版本更新到 5.5.7-458

修改帖子评论复用问题

See merge request halo/android/assistant-android!197

.gitignore

@@ -1,9 +1,12 @@
-/.idea
-.idea/misc.xml
+.idea/
 *.iml
-.gradle
-/local.properties
+.gradle/
+local.properties
+# sign.properties
 .DS_Store
-/build
-/captures
-/PushSDK/build
+captures/
+build/
+release-app/
+test-app/
+scripts/apk-channel/
+app/src/test/java/com/gh/gamecenter

.gitmodules

@@ -0,0 +1,7 @@
+[submodule "libraries/LGLibrary"]
+	path = libraries/LGLibrary
+	url = git@git.ghzs.com:android/common-library.git
+	branch = master
+[submodule "assistant_flutter"]
+	path = assistant_flutter
+	url = git@git.ghzs.com:halo/android/flutter-module.git

CHANGELOG.md

@@ -0,0 +1,89 @@
+# 版本升级备忘
+
+### Ver 2.5
+* 此处写本次更新所做的业务和代码修改
+
+### Ver 2.6
+* xx
+
+### Ver 3.0
+* 升级账号系统(登录流程/用户信息相关/用户账号相关操作(评论,礼包...))
+* 新增收藏功能(文章/工具箱)
+* 删除用户相关的所有本地数据库
+* 重做总开服表
+* 重做首页插件化模块
+* 礼包重复领取机制改变(可重复领取的礼包,领取后立刻显示再领一个/再淘一个)
+* 游戏下载平台面板修改(加快弹出速度,不再读取本地平台图片)
+* 接入bugly(tinker)
+
+### VER 3.1
+### VER 3.2
+### VER 3.3
+### VER 3.4
+### VER 3.5
+
+### Ver 3.6
+* 首页游戏增加预览骨架,游戏ITEM样式微调和开服标签
+* 首页问答增加关注页面
+* 重构游戏更新管理(游戏更新/插件化/已安装的游戏),具体细节参考PackageRepository & PackageViewModel
+* 重构APP更新管理(已VersionVode为更新基准,小版本更新改为光环后台控制)
+  - 删除TINKER_VERISON_NAME
+  - tinker打包方式变更(以小版本作为Base包,防止与数据后台小版本更新发生冲突)
+* 社区增加版主功能(版主可以对存在的相关内容进行修改/隐藏操作,内容包括问题/回答/回答评论)
+* 社区互动引导优化(问答推荐增加`推荐关注`,回答详情增加一些交互动效)
+
+### Ver 3.6.1
+* 可以后台控制关闭资讯功能
+* 版块、分类、专题详情、游戏详情、礼包详情增加预览骨架
+* 下载按钮状态可以通过接口屏蔽相应的包
+
+### Ver 3.6.2
+* 资讯/问答入口和插件功能线上控制(不可逆)
+* 首页不显示已安装的游戏
+* 插件求版本功能增加内部跳转
+* 下载面板增加公告和版本说明功能
+* 接入腾讯`广点通`(广告)
+
+### ver 3.6.3
+* 社区搜索修改
+  - 增加 `文章/用户` 模块
+  - 增加 `搜索置顶` 功能
+* 回答详情/社区文章详情修改
+  - 支持文案样式(加粗/斜体/删除线)和段落样式(引用/标题)
+  - 支持关闭评论功能
+  - 回答详情新增上下切换回答
+* 社区编辑框(回答/文章)修改
+  - 支持批量插入图片(使用知乎Matisse实现)
+  - 新增插入特殊样式,文案样式(加粗/斜体/删除线)和段落样式(引用/标题)
+* 编辑框部分 JS/CSS 使用远程文件
+
+### ver 3.6.4
+* 增加浏览记录(回答/文章/资讯/游戏)
+* 回答/社区文章 增加反对功能
+* 社区编辑框增加插入文章/回答/游戏
+  - 低版本兼容方案: 插入的样式默认隐藏,只有在3.6.4及以上才会显示
+* 游戏详情评分模块增加`小编评论`区域以及样式修改
+* 游戏评分增加回复功能
+
+### var 3.6.5
+* 以补丁方式向外推出，并没有增加需求，只是单纯的修BUG
+
+### var 3.6.6
+* 游戏详情:
+  - 支持修改评分
+  - 评分列表增加排序/过滤功能
+  - 增加弹出系统
+* 社区相关:
+  - 选择社区页面重做
+  - 首页社区推荐增加推荐入口
+  - 首页社区问题模块改版,名称改为全部,去除问题分类(统一为问题列表),增加社区文章列表
+* 游戏搜索默认页面改版
+* 权限系统更改,不授权也可以进去App,申请权限细分到功能(用到某个功能时才需要强制授予权限)
+* 增加隐私系统
+* 增加游戏预约功能
+* 增加标签详情模块
+* 进入今日头条广告SDK
+* 图片上传压缩机制优化
+  - 支持从后台修改上传配置(本该在早些版本实现,由于代码问题无法引用后台配置)
+  - 对压缩失败是进行catch(由于后台对宽高配置放宽,很容易发生OOM),失败后直接上传原图(这步可能会出现问题)
+* 游戏相关UI修改

PushSDK/AndroidManifest.xml

@@ -1,147 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.umeng.message.lib"
-    android:versionCode="1"
-    android:versionName="1.0">
-
-    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.WAKE_LOCK" />
-    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
-    <uses-permission android:name="android.permission.BROADCAST_PACKAGE_ADDED" />
-    <uses-permission android:name="android.permission.BROADCAST_PACKAGE_CHANGED" />
-    <uses-permission android:name="android.permission.BROADCAST_PACKAGE_INSTALL" />
-    <uses-permission android:name="android.permission.BROADCAST_PACKAGE_REPLACED" />
-    <uses-permission android:name="android.permission.RESTART_PACKAGES" />
-    <uses-permission android:name="android.permission.GET_TASKS" />
-    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
-    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
-    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
-
-    <application>
-
-        <service
-            android:name="com.taobao.accs.ChannelService"
-            android:exported="true"
-            android:process=":channel">
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.SERVICE" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.ELECTION" />
-            </intent-filter>
-        </service>
-
-        <service
-            android:name="com.taobao.accs.data.MsgDistributeService"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.RECEIVE" />
-            </intent-filter>
-        </service>
-
-        <receiver
-            android:name="com.taobao.accs.EventReceiver"
-            android:process=":channel">
-            <intent-filter>
-                <action android:name="android.intent.action.BOOT_COMPLETED" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.intent.action.PACKAGE_REMOVED" />
-                <data android:scheme="package" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.intent.action.USER_PRESENT" />
-            </intent-filter>
-        </receiver>
-
-        <receiver
-            android:name="com.taobao.accs.ServiceReceiver"
-            android:exported="false"
-            android:process=":channel">
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.COMMAND" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.START_FROM_AGOO" />
-            </intent-filter>
-        </receiver>
-
-        <service
-            android:name="com.taobao.accs.ChannelService$KernelService"
-            android:process=":channel">
-        </service>
-
-        <service
-            android:name="org.android.agoo.accs.AgooService"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.RECEIVE" />
-            </intent-filter>
-        </service>
-
-        <service android:name="com.umeng.message.UmengIntentService"
-            android:exported="true"
-            android:process=":channel">
-            <intent-filter>
-                <action android:name="org.agoo.android.intent.action.RECEIVE" />
-            </intent-filter>
-        </service>
-
-        <receiver
-            android:name="com.taobao.agoo.AgooCommondReceiver"
-            android:exported="true">
-            <intent-filter>
-                <action android:name="com.gh.gamecenter.intent.action.COMMAND" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.intent.action.PACKAGE_REMOVED" />
-                <data android:scheme="package" />
-            </intent-filter>
-        </receiver>
-
-        <receiver
-            android:name="com.umeng.message.NotificationProxyBroadcastReceiver"
-            android:exported="false" />
-        <service
-            android:name="com.umeng.message.UmengMessageCallbackHandlerService"
-            android:exported="false">
-            <intent-filter>
-                <action android:name="com.umeng.messge.registercallback.action" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.umeng.message.enablecallback.action" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.umeng.message.disablecallback.action" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.umeng.message.message.handler.action" />
-            </intent-filter>
-        </service>
-
-        <service
-            android:name="com.umeng.message.UmengDownloadResourceService"
-            android:exported="false" />
-        <service
-            android:name="com.umeng.message.UmengMessageIntentReceiverService"
-            android:exported="true"
-            android:process=":channel" >
-            <intent-filter>
-                <action android:name="org.android.agoo.client.MessageReceiverService" />
-            </intent-filter>
-        </service>
-        <provider
-            android:name="com.umeng.message.provider.MessageProvider"
-            android:authorities="com.gh.gamecenter.umeng.message"
-            android:exported="false">
-            <grant-uri-permission android:pathPattern=".*" />
-        </provider>
-    </application>
-
-</manifest>

PushSDK/build.gradle

@@ -1,51 +0,0 @@
-apply plugin: 'com.android.library'
-
-android {
-    compileSdkVersion 22
-    buildToolsVersion "23.0.2"
-
-    defaultConfig {
-        minSdkVersion 11
-        targetSdkVersion 22
-    }
-
-    buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
-        }
-        debug {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
-        }
-    }
-
-    sourceSets {
-        main {
-            manifest.srcFile 'AndroidManifest.xml'
-            java.srcDirs = ['src']
-            resources.srcDirs = ['src']
-            aidl.srcDirs = ['src']
-            renderscript.srcDirs = ['src']
-            res.srcDirs = ['res']
-            assets.srcDirs = ['assets']
-            jniLibs.srcDirs = ['libs']
-        }
-
-        // Move the tests to tests/java, tests/res, etc...
-        instrumentTest.setRoot('tests')
-
-        // Move the build types to build-types/<type>
-        // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
-        // This moves them out of them default location under src/<type>/... which would
-        // conflict with src/ being used by the main source set.
-        // Adding new build types or product flavors should be accompanied
-        // by a similar customization.
-        debug.setRoot('build-types/debug')
-        release.setRoot('build-types/release')
-    }
-}
-
-dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-}

PushSDK/build/intermediates/manifest/androidTest/debug/AndroidManifest.xml

@@ -1,156 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.umeng.message.lib.test" >
-
-    <uses-sdk
-        android:minSdkVersion="11"
-        android:targetSdkVersion="22" />
-
-    <instrumentation
-        android:name="android.test.InstrumentationTestRunner"
-        android:functionalTest="false"
-        android:handleProfiling="false"
-        android:label="Tests for com.umeng.message.lib.test"
-        android:targetPackage="com.umeng.message.lib.test" />
-
-    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.WAKE_LOCK" />
-    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
-    <uses-permission android:name="android.permission.BROADCAST_PACKAGE_ADDED" />
-    <uses-permission android:name="android.permission.BROADCAST_PACKAGE_CHANGED" />
-    <uses-permission android:name="android.permission.BROADCAST_PACKAGE_INSTALL" />
-    <uses-permission android:name="android.permission.BROADCAST_PACKAGE_REPLACED" />
-    <uses-permission android:name="android.permission.RESTART_PACKAGES" />
-    <uses-permission android:name="android.permission.GET_TASKS" />
-    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
-    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
-    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
-
-    <application>
-        <uses-library android:name="android.test.runner" />
-
-        <service
-            android:name="com.taobao.accs.ChannelService"
-            android:exported="true"
-            android:process=":channel" >
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.SERVICE" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.ELECTION" />
-            </intent-filter>
-        </service>
-        <service
-            android:name="com.taobao.accs.data.MsgDistributeService"
-            android:exported="true" >
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.RECEIVE" />
-            </intent-filter>
-        </service>
-
-        <receiver
-            android:name="com.taobao.accs.EventReceiver"
-            android:process=":channel" >
-            <intent-filter>
-                <action android:name="android.intent.action.BOOT_COMPLETED" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.intent.action.PACKAGE_REMOVED" />
-
-                <data android:scheme="package" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.intent.action.USER_PRESENT" />
-            </intent-filter>
-        </receiver>
-        <receiver
-            android:name="com.taobao.accs.ServiceReceiver"
-            android:exported="false"
-            android:process=":channel" >
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.COMMAND" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.START_FROM_AGOO" />
-            </intent-filter>
-        </receiver>
-
-        <service
-            android:name="com.taobao.accs.ChannelService$KernelService"
-            android:process=":channel" >
-        </service>
-        <service
-            android:name="org.android.agoo.accs.AgooService"
-            android:exported="true" >
-            <intent-filter>
-                <action android:name="com.taobao.accs.intent.action.RECEIVE" />
-            </intent-filter>
-        </service>
-        <service
-            android:name="com.umeng.message.UmengIntentService"
-            android:exported="true"
-            android:process=":channel" >
-            <intent-filter>
-                <action android:name="org.agoo.android.intent.action.RECEIVE" />
-            </intent-filter>
-        </service>
-
-        <receiver
-            android:name="com.taobao.agoo.AgooCommondReceiver"
-            android:exported="true" >
-            <intent-filter>
-                <action android:name="com.gh.gamecenter.intent.action.COMMAND" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="android.intent.action.PACKAGE_REMOVED" />
-
-                <data android:scheme="package" />
-            </intent-filter>
-        </receiver>
-        <receiver
-            android:name="com.umeng.message.NotificationProxyBroadcastReceiver"
-            android:exported="false" />
-
-        <service
-            android:name="com.umeng.message.UmengMessageCallbackHandlerService"
-            android:exported="false" >
-            <intent-filter>
-                <action android:name="com.umeng.messge.registercallback.action" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.umeng.message.enablecallback.action" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.umeng.message.disablecallback.action" />
-            </intent-filter>
-            <intent-filter>
-                <action android:name="com.umeng.message.message.handler.action" />
-            </intent-filter>
-        </service>
-        <service
-            android:name="com.umeng.message.UmengDownloadResourceService"
-            android:exported="false" />
-        <service
-            android:name="com.umeng.message.UmengMessageIntentReceiverService"
-            android:exported="true"
-            android:process=":channel" >
-            <intent-filter>
-                <action android:name="org.android.agoo.client.MessageReceiverService" />
-            </intent-filter>
-        </service>
-
-        <provider
-            android:name="com.umeng.message.provider.MessageProvider"
-            android:authorities="com.gh.gamecenter.umeng.message"
-            android:exported="false" >
-            <grant-uri-permission android:pathPattern=".*" />
-        </provider>
-    </application>
-
-</manifest>

PushSDK/project.properties

@@ -1,12 +0,0 @@
-# This file is automatically generated by Android Tools.
-# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
-#
-# This file must be checked in Version Control Systems.
-#
-# To customize properties used by the Ant build system use,
-# "ant.properties", and override values to adapt the script to your
-# project structure.
-
-# Project target.
-target=android-19
-android.library=true

PushSDK/res/values/string.xml

@@ -1,3 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-</resources>

README.md

@@ -0,0 +1,68 @@
+# 光环助手Android客户端
+
+### 概述
+
+光环助手Android客户端目前使用 Kotlin 作为主要开发语言，以 MVVM 作为参考架构模式进行开发
+
+### 约束
+
+为编写易读易维护且较健壮的代码，可参考以下约束
+
+1. 尽量将逻辑代码放置于 ViewModel 中，View 中只执行 UI 操作
+2. 尽量使 View 在被销毁之后仍能恢复状态，处理方式可参考 [保存界面状态](https://developer.android.com/topic/libraries/architecture/saving-states)
+3. 尽量参考原有文件结构及命名规范，即以 大模块 - 小模块 的形式生成包关系
+4. 遵循最小改动原则，在提交代码前务必先检查变动的代码，尽量以可控的变动规模来构成一个 commit ，以便日后追踪问题
+5. 代码规范可参考 [AOSP Java 风格](https://source.android.com/setup/contribute/code-style)
+6. 尽量使用 Kotlin 来写新文件
+7. 尽量不要使用 DataBinding，因为回影响编译性能
+8. Commit 前请确保不带入非项目必须文件，可手动修改 [.gitignore](https://stackoverflow.com/questions/8527597/how-do-i-ignore-files-in-a-directory-in-git) 文件忽略
+9. 新页面请勿使用 ButterKnife 来进行 View 获取和绑定，请使用 ViewBinding
+10. No AsyncTask!
+
+### 公用部分
+
+本项目使用 LiveData 实现了一个简单通用的基础列表分页功能，具体可见 `ListFragment`, `ListViewModel` 等类，理想情况下只需少量代码即可新建一个简单分页列表
+
+### 首次拉取项目代码
+
+`git clone -b dev git@git.ghzs.com:halo/android/assistant-android.git --recursive`
+
+### git 版本管理
+
+本项目使用简化版的 git flow 来管理分支，细节请看 [光环安卓简单 git 规范](https://git.ghzs.com/halo/android/assistant-android/-/wikis/%E5%85%89%E7%8E%AF%E5%AE%89%E5%8D%93%E7%AE%80%E5%8D%95-git-%E8%A7%84%E8%8C%83)
+
+### API 环境配置
+
+本项目使用 Build Variants 来切换 API 环境
+
+* internal 为测试环境
+* publish 为正式环境
+
+### 图片资源配置
+
+* 新增图片资源时，默认只添加最高规格的 xxxhdpi 文件
+* 新增图片资源时，需要将其转换为 .webp 格式 (包括含透明图层的图片，默认质量为90%) (转换后体积变大的文件除外)
+
+### 第三方appkey等配置
+
+* 修改`gradle.properties`文件将各种key填入其中，实现统一管理
+* 通过gradle文件内的resValue/buildConfigField/manifestPlaceHolder方式实现编译期间修改，具体情况请参考``./build.gradle``和``./app/build.gradle``配置
+
+### 混淆配置
+
+* 本项目使用了微信的 [AndResGuard](https://github.com/shwenzhang/AndResGuard) 作为资源混淆压缩方案，新增需要使用 `getIdentifier` 获取的资源文件时需要添加至白名单
+* 本项目默认使用 R8 作为混淆工具，往 proguard-rules.txt 添加 proguard 新配置项时请检查可用性(如语法等)
+
+### APK打包配置
+
+* 本项目使用了 [VasDolly](https://github.com/Tencent/VasDolly) 作为渠道包实现方案
+* 打包命令，具体参数请见相应文件：
+
+> 打内部测试包：`./scripts/test_build.sh`
+> 打正式发布包：`./scripts/build_with_simple_backup.sh`
+
+### TODO
+
+* 把原有 EventBus 的消息 Type 统一到一个文件内
+* 将实现细节从 View(Fragment、Activity) 剥离并以 MVVM 结构改造
+* 重构 MainActivity

app/build.gradle

@@ -1,132 +1,604 @@
+// This comment exists for a reason, do not delete
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android' // kotlin
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-kapt'
+apply plugin: 'AndResGuard'
+
+import groovy.xml.XmlUtil
 
 android {
-    compileSdkVersion 21
-    buildToolsVersion "23.0.3"
 
-    defaultConfig {
-        applicationId "com.gh.gamecenter"
-        minSdkVersion 14
-        targetSdkVersion 21
-        versionCode 18
-        versionName "2.3"
-
-        // 默认的渠道
-//        manifestPlaceholders = [CHANNEL_VALUE: "GH_TEST"]
+    androidExtensions {
+        experimental = true
     }
 
-    /**
-     * 签名设置
-     */
+    buildFeatures {
+        viewBinding = true
+        dataBinding = true
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+
+    dexOptions {
+//        jumboMode = true
+        javaMaxHeapSize "4g"
+        preDexLibraries true
+        maxProcessCount 8
+    }
+
+    aaptOptions {
+        additionalParameters "--no-version-vectors"
+    }
+
+    kapt {
+        useBuildCache = true
+        javacOptions {
+            // 增加注解处理器的最大错误次数,默认为 100
+            option("-Xmaxerrs", 500)
+        }
+    }
+
+    defaultConfig {
+
+        multiDexEnabled true
+        javaCompileOptions {
+            annotationProcessorOptions {
+                arguments = [eventBusIndex: 'com.gh.EventBusIndex']
+            }
+        }
+
+        ndk {
+            // 如果不添加 `arm64` 调用系统的 PackageManager 的方法读取安装包信息的时候会出现 native 层闪退，草
+            // 添加了 `arm64` 以后部分 5.0 的设备会报用错 so 的问题，
+            // couldn't find DSO to load: libimagepipeline.so caused by: dlopen failed: "/data/data/com.gh.gamecenter/lib-main/libimagepipeline.so" is 64-bit instead of 32-bit result: 0
+            // 以 OPPO R7PLUS 为例，明明设备是骁龙 615，ARMv8-64 bit 的设备却不支持 arm64 的 abi，限制了只使用 java 后还是报错，只有 5.0，5.1 设备无法复现 : (
+            // 惊了
+            abiFilters "armeabi-v7a", "arm64-v8a", "x86"
+        }
+
+        renderscriptTargetApi 18
+        renderscriptSupportModeEnabled true
+
+        // 由于app只针对中文用户，所以仅保留zh资源，其他删掉
+        resConfigs "zh"
+
+        minSdkVersion rootProject.ext.minSdkVersion
+        targetSdkVersion rootProject.ext.targetSdkVersion
+        versionCode rootProject.ext.versionCode
+        versionName rootProject.ext.versionName
+        applicationId rootProject.ext.applicationId
+
+        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt', 'proguard-fresco.txt'
+
+        /**
+         * All third-party appid/appkey
+         */
+        buildConfigField "String", "API_HOST", "\"${API_HOST}\""
+        buildConfigField "String", "NEW_API_HOST", "\"${NEW_API_HOST}\""
+        buildConfigField "String", "WECHAT_APPID", "\"${WECHAT_APPID}\""
+        buildConfigField "String", "WECHAT_SECRET", "\"${WECHAT_SECRET}\""
+        buildConfigField "String", "TENCENT_APPID", "\"${TENCENT_APPID}\""
+        buildConfigField "String", "WEIBO_APPKEY", "\"${WEIBO_APPKEY}\""
+        buildConfigField "String", "TD_APPID", "\"${TD_APPID}\""
+        buildConfigField "String", "LETO_APPID", "\"${LETO_APPID}\""
+        buildConfigField "String", "TTAD_APPID", "\"${TTAD_APPID}\""
+        buildConfigField "String", "DOUYIN_CLIENTKEY", "\"${DOUYIN_CLIENTKEY}\""
+        buildConfigField "String", "DOUYIN_CLIENTSECRET", "\"${DOUYIN_CLIENTSECRET}\""
+        buildConfigField "String", "QUICK_LOGIN_APPID", "\"${QUICK_LOGIN_APPID}\""
+        buildConfigField "String", "QUICK_LOGIN_APPKEY", "\"${QUICK_LOGIN_APPKEY}\""
+
+        /**
+         * Build Time 供区分 jenkins 打包时间用
+         */
+        buildConfigField "long", "BUILD_TIME", "0"
+    }
+
+    // gradle 2.2以上默认同时启用v1和v2（优先用于Android N）
     signingConfigs {
+        debug {
+            v1SigningEnabled true
+            v2SigningEnabled true
+        }
         release {
-            storeFile file("gh.keystore")
-            keyAlias "gh.keystore"
-            keyPassword "20150318"
-            storePassword "20150318"
+            v1SigningEnabled true
+            v2SigningEnabled true
         }
     }
 
     buildTypes {
         debug {
+            debuggable true
             minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            zipAlignEnabled false
+            signingConfig signingConfigs.debug
+
+            buildConfigField "String", "EXPOSURE_REPO", "\"test\""
+            buildConfigField "String", "EXPOSURE_VERSION", "\"E4\""
+
+            multiDexKeepProguard file("tinker_multidexkeep.pro")
         }
         release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            debuggable false
+            minifyEnabled true
+            zipAlignEnabled true
+            shrinkResources true
             signingConfig signingConfigs.release
+
+            buildConfigField "String", "EXPOSURE_REPO", "\"exposure\""
+            buildConfigField "String", "EXPOSURE_VERSION", "\"E4\""
+
+            multiDexKeepProguard file("tinker_multidexkeep.pro")
         }
     }
 
-    /**
-     * 多渠道打包
-     */
-    productFlavors {
-        GH_100 {}
-        GH_101 {}
-        GH_102 {}
-        GH_103 {}
-        GH_104 {}
-        GH_106 {}
-        GH_107 {}
-        GH_108 {}
-        GH_109 {}
-        GH_110 {}
-        GH_111 {}
-        GH_113 {}
-        GH_114 {}
-        GH_115 {}
-        GH_116 {}
-        GH_117 {}
-        GH_118 {}
-        GH_119 {}
-        GH_120 {}
-        GH_121 {}
-        GH_123 {}
-        GH_127 {}
-        GH_200 {}
-        GH_201 {}
-        GH_202 {}
-        GH_203 {}
-        GH_204 {}
-        GH_205 {}
-        GH_222 {}
-        GH_307 {}
-        GH_TEST {}
+    // Ignore useless variant
+    variantFilter { variant ->
+        def names = variant.flavors*.name
+        def isDebugType = variant.buildType.name == "debug"
+        if ((names.contains("tea") || name.contains("gdt")) && isDebugType) {
+            setIgnore(true)
+        }
     }
-    productFlavors.all { flavor ->
-        flavor.manifestPlaceholders = [CHANNEL_VALUE: name]//命令 gradlew assembleRelease
+
+    flavorDimensions("env")
+
+    sourceSets {
+        publish {
+            java.srcDirs = ['src/main/java']
+        }
+        internal {
+            java.srcDirs = ['src/main/java']
+        }
+        tea {
+            java.srcDirs = ['src/main/java', 'src/tea/java']
+        }
+        gdt {
+            java.srcDirs = ['src/main/java', 'src/gdt/java']
+        }
+    }
+
+    productFlavors {
+        // internal test dev host
+        internal {
+            dimension "env"
+            versionNameSuffix "-debug"
+
+            buildConfigField "String", "DEV_API_HOST", "\"${DEV_API_HOST}\""
+            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_DEV_API_HOST}\""
+        }
+
+        // publish release host˛
+        publish {
+            dimension "env"
+
+            buildConfigField "String", "DEV_API_HOST", "\"${API_HOST}\""
+            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_API_HOST}\""
+        }
+
+        tea {
+            dimension "env"
+
+            buildConfigField "String", "DEV_API_HOST", "\"${API_HOST}\""
+            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_API_HOST}\""
+
+            manifestPlaceholders.put("APPLOG_SCHEME", "rangersapplog.byAx6uYt".toLowerCase())
+        }
+
+        gdt {
+            dimension "env"
+
+            buildConfigField "String", "DEV_API_HOST", "\"${API_HOST}\""
+            buildConfigField "String", "NEW_DEV_API_HOST", "\"${NEW_API_HOST}\""
+        }
+    }
+
+    lintOptions {
+        // For flutter release build, see https://github.com/flutter/flutter/issues/58247
+        checkReleaseBuilds false
     }
 }
 
-//butterknife
-buildscript {
-    repositories {
-        mavenCentral()
-    }
-    dependencies {
-        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
+repositories {
+    flatDir {
+        dirs 'libs', 'libs/aars'
     }
 }
-apply plugin: 'com.neenbedankt.android-apt'
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:21.0.0'
-//    compile 'com.android.support:cardview-v7:21.0.0'
-    // fresco图片框架
-    compile 'com.facebook.fresco:fresco:0.12.0'
-    compile 'com.facebook.fresco:animated-gif:0.12.0'
-    // Retrofit2所需要的包
-    compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4'
-    // okhttp
-    compile 'com.squareup.okhttp3:okhttp:3.2.0'
-    // ConverterFactory的Gson依赖包
-    compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'
-    // ConverterFactory的String依赖包
-    //    compile 'com.squareup.retrofit2:converter-scalars:2.0.0-beta4'
-    // ConverterFactory的RxJava依赖包
-    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4'
-    // gson
-    compile 'com.google.code.gson:gson:2.8.0'
-    // OrmLite数据库
-    compile 'com.j256.ormlite:ormlite-android:5.0'
-    compile 'com.j256.ormlite:ormlite-core:5.0'
-    // butterknife
-    compile 'com.jakewharton:butterknife:8.4.0'
-    apt 'com.jakewharton:butterknife-compiler:8.4.0'
-    // RxJava && RxAndroid
-    compile 'io.reactivex:rxandroid:1.1.0'
-    compile 'io.reactivex:rxjava:1.1.0'
-    // RxBinding
-    compile 'com.jakewharton.rxbinding:rxbinding:0.3.0'
-    //    compile 'com.jakewharton.rxbinding:rxbinding-appcompat-v7:0.3.0'
-    //    compile 'com.jakewharton.rxbinding:rxbinding-design:0.3.0'
-    //添加友盟依赖工程
-    compile project(':PushSDK')
-    // zxing 二维码扫描以及生成
-    compile 'com.google.zxing:core:3.2.1'
-    compile 'com.google.zxing:android-core:3.2.1'
+
+    implementation fileTree(include: ['*.jar', '*.aar'], dir: 'libs')
+    gdtImplementation fileTree(include: ['*.jar', '*.aar'], dir: 'src/gdt/libs')
+
+    testImplementation 'junit:junit:4.12'
+
+    debugImplementation "com.squareup.leakcanary:leakcanary-android:${leakcanary}"
+    debugImplementation "com.squareup.okhttp3:logging-interceptor:${okHttp}"
+//    debugImplementation "com.gu.android:toolargetool:${toolargetool}" // 需要使用调试时才启用
+    debugImplementation "com.github.nichbar:WhatTheStack:${whatTheStack}"
+
+    implementation "androidx.core:core-ktx:${core}"
+    implementation "androidx.fragment:fragment-ktx:${fragment}"
+    implementation "androidx.multidex:multidex:${multiDex}"
+    implementation "androidx.appcompat:appcompat:${appCompat}"
+    implementation "androidx.cardview:cardview:${cardView}"
+    implementation "androidx.annotation:annotation:${annotation}"
+    implementation "androidx.constraintlayout:constraintlayout:${constraintLayout}"
+    implementation "androidx.recyclerview:recyclerview:${recyclerView}"
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifeCycle"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifeCycle"
+    implementation "androidx.lifecycle:lifecycle-common-java8:$lifeCycle"
+    implementation "androidx.room:room-runtime:${room}"
+    implementation "androidx.room:room-rxjava2:${room}"
+    implementation "androidx.core:core-ktx:${ktx}"
+    implementation "androidx.viewpager2:viewpager2:${viewpager2}"
+    implementation "androidx.webkit:webkit:${webkit}"
+    kapt "androidx.room:room-compiler:${room}"
+
+    implementation "com.google.android.material:material:${material}"
+
+    implementation "com.kyleduo.switchbutton:library:${switchButton}"
+
+    implementation "com.facebook.fresco:fresco:${fresco}"
+    implementation "com.facebook.fresco:animated-gif-lite:${fresco}"
+    implementation "com.facebook.fresco:animated-drawable:${fresco}"
+    implementation "com.facebook.fresco:animated-webp:${fresco}"
+    implementation "com.facebook.fresco:webpsupport:${fresco}"
+
+    implementation "com.squareup.okhttp3:okhttp:${okHttp}"
+
+    implementation "com.leon.channel:helper:${apkChannelPackage}"
+
+    implementation "com.squareup.retrofit2:retrofit:${retrofit}"
+    implementation "com.squareup.retrofit2:converter-gson:${retrofit}"   // include gson 2.7
+    implementation "com.squareup.retrofit2:adapter-rxjava2:${retrofit}"
+
+    implementation "com.j256.ormlite:ormlite-android:${ormlite}"
+    implementation "com.j256.ormlite:ormlite-core:${ormlite}"
+
+    implementation "com.jakewharton:butterknife:${butterKnife}"
+    kapt "com.jakewharton:butterknife-compiler:${butterKnife}"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:${kotlin_version}"
+
+    implementation "org.greenrobot:eventbus:${eventbus}"
+    kapt "org.greenrobot:eventbus-annotation-processor:${eventbusApt}"
+
+    implementation "io.reactivex.rxjava2:rxjava:${rxJava2}"
+    implementation "io.reactivex.rxjava2:rxandroid:${rxAndroid2}"
+    implementation "com.jakewharton.rxbinding2:rxbinding:${rxBinding2}"
+
+    implementation "com.google.zxing:core:${zxing}"
+    implementation "com.google.zxing:android-core:${zxing}"
+
+    implementation "com.daimajia.swipelayout:library:${swipeLayout}"
+
+    implementation "com.google.android:flexbox:${flexbox}"
+
+    implementation "pub.devrel:easypermissions:${easypermissions}"
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+
+    implementation "com.contrarywind:Android-PickerView:${pickerView}"
+
+    implementation "com.scwang.smartrefresh:SmartRefreshLayout:${smartRefreshLayout}"
+    implementation "net.cachapa.expandablelayout:expandablelayout:${expandableLayout}"
+
+    // 用于比较 versionName 是大于小于或等于
+    implementation "com.g00fy2:versioncompare:${versioncompare}"
+
+    implementation "top.zibin:Luban:${luban}"
+
+    implementation "com.squareup.picasso:picasso:${picasso}"
+
+    // for video streaming
+    implementation("com.github.CarGuo.GSYVideoPlayer:gsyVideoPlayer-java:$gsyVideo", {
+        exclude module: "gsyvideoplayer-androidvideocache"
+        exclude group: "tv.danmaku.ijk.media"
+    })
+    implementation "com.github.CarGuo.GSYVideoPlayer:gsyVideoPlayer-exo_player2:$gsyVideo"
+
+    implementation "android.arch.work:work-runtime:${workManager}"
+
+    implementation "com.llew.huawei:verifier:${verifier}"
+
+    implementation "com.github.tbruyelle:rxpermissions:${rxPermissions}"
+
+    implementation "com.lg:skeleton:${skeleton}"
+    implementation "com.tencent.mm.opensdk:wechat-sdk-android-without-mta:${mta}"
+    implementation "com.github.nichbar:AndroidRomChecker:${romChecker}"
+
+    debugImplementation "com.github.nichbar.chucker:library:${chucker}"
+    releaseImplementation "com.github.nichbar.chucker:library-no-op:${chucker}"
+    teaImplementation "com.bytedance.applog:RangersAppLog-Lite-cn:${bytedanceApplog}"
+
+    implementation "com.aliyun.dpa:oss-android-sdk:${oss}"
+
+    implementation "com.airbnb.android:lottie:${lottie}"
+
+    implementation "net.lingala.zip4j:zip4j:${zip4j}"
+
+    implementation "io.sentry:sentry-android:4.3.0"
+
+    implementation("com.github.piasy:BigImageViewer:${bigImageViewer}", {
+        exclude group: 'com.squareup.okhttp3'
+        exclude group: 'androidx.swiperefreshlayout'
+        exclude group: 'com.github.bumptech.glide'
+        exclude group: 'com.facebook.fresco'
+    })
+    implementation "com.github.PhilJay:MPAndroidChart:${chart}"
+
+    implementation "com.lahm.library:easy-protector-release:${easyProtector}"
+
+    implementation "com.github.hsiafan:apk-parser:${apkParser}"
+    implementation "org.nanohttpd:nanohttpd:${nanohttpd}"
+
+    implementation "com.aliyun.openservices:aliyun-log-android-sdk:${aliyunLog}"
+    implementation "com.lg:easyfloat:${easyFloat}"
+
+    implementation "io.github.florent37:shapeofview:${shapeOfView}"
+
+    implementation "io.github.sinaweibosdk:core:${weiboSDK}"
+
+    implementation "com.lg:gid:1.3.0"
+
+    implementation "com.louiscad.splitties:splitties-fun-pack-android-base-with-views-dsl:${splitties}"
+
+    compileOnly "com.github.axen1314.lancet:lancet-base:$lancet_version"
+
+    implementation project(':libraries:LGLibrary')
+    implementation project(':libraries:QQShare')
+    implementation project(':libraries:Matisse')
+}
+File propFile = file('sign.properties')
+if (propFile.exists()) {
+    Properties props = new Properties()
+    props.load(new FileInputStream(propFile))
+
+    if (props.containsKey('keyAlias') && props.containsKey('keyPassword') &&
+            props.containsKey('storeFile') && props.containsKey('storePassword')) {
+        android.signingConfigs {
+            // debug 不要使用正式签名，这样tinker才不会打补丁。
+            debug {
+                keyAlias props.get('keyAlias')
+                keyPassword props.get('keyPassword')
+                storeFile file(props.get('storeFile'))
+                storePassword props.get('storePassword')
+            }
+            release {
+                keyAlias props.get('keyAlias')
+                keyPassword props.get('keyPassword')
+                storeFile file(props.get('storeFile'))
+                storePassword props.get('storePassword')
+            }
+        }
+    } else {
+        android.buildTypes.release.signingConfig = null
+    }
+} else {
+    android.buildTypes.release.signingConfig = null
+}
+
+// 用于测试读取 META-INF 里的文件
+//task generateMetaJson {
+//    def resDir = new File(buildDir, 'generated/FILES_FOR_META_INF/')
+//    def destDir = new File(resDir, 'META-INF/')
+//    // Add resDir as a resource directory so that it is automatically included in the APK.
+//    android {
+//        sourceSets {
+//            main.resources {
+//                srcDir resDir
+//            }
+//        }
+//    }
+//
+//    doLast {
+//        if (!destDir.exists()) destDir.mkdirs()
+//        copy {
+//            into destDir
+//            from new File('generated/FILES_FOR_META_INF/META-INF/halo_skip.json')
+//        }
+//    }
+//}
+//// Specify when put_files_in_META_INF should run
+//project.afterEvaluate {
+//    tasks.findAll { task ->
+//        task.name.startsWith('merge') && task.name.endsWith('Resources')
+//    }.each { t -> t.dependsOn generateMetaJson }
+//}
+
+andResGuard {
+    mappingFile = null
+    use7zip = true
+    useSign = true
+    // 打开这个开关，会keep住所有资源的原始路径，只混淆资源的名字
+    keepRoot = false
+    // 设置这个值，会把arsc name列混淆成相同的名字，减少string常量池的大小
+    fixedResName = "arg"
+    // 打开这个开关会合并所有哈希值相同的资源，但请不要过度依赖这个功能去除去冗余资源
+    mergeDuplicatedRes = true
+    whiteList = [
+            "R.drawable.icon",
+            "R.drawable.ic_bar_back",
+            "R.drawable.toolbar_search_icon",
+            "R.drawable.bg_notification_answer_style_1",
+            "R.drawable.bg_notification_answer_style_2",
+            "R.drawable.bg_notification_article_style_1",
+            "R.drawable.bg_notification_article_style_2",
+            "R.drawable.bg_notification_feedback_style_1",
+            "R.drawable.bg_notification_feedback_style_2",
+            "R.drawable.bg_notification_gift_style_1",
+            "R.drawable.bg_notification_gift_style_2",
+            "R.drawable.bg_notification_login_style_1",
+            "R.drawable.bg_notification_login_style_2",
+            "R.drawable.bg_notification_question_style_1",
+            "R.drawable.bg_notification_question_style_2",
+            "R.drawable.bg_notification_rating_style_1",
+            "R.drawable.bg_notification_rating_style_2",
+            "R.drawable.bg_notification_reserve_game_style_1",
+            "R.drawable.bg_notification_reserve_game_style_2",
+            "R.drawable.bg_notification_video_style_1",
+            "R.drawable.bg_notification_video_style_2",
+            "R.drawable.ic_search_no_1",
+            "R.drawable.ic_search_no_2",
+            "R.drawable.ic_search_no_3",
+            "R.drawable.ic_search_no_4",
+            "R.drawable.ic_search_no_5",
+            "R.drawable.ic_search_no_6",
+            "R.drawable.ic_search_no_7",
+            "R.drawable.ic_search_no_8",
+            "R.drawable.ic_search_no_9",
+            "R.drawable.ic_search_no_10",
+            "R.drawable.ic_search_no_11",
+            "R.drawable.ic_search_no_12",
+            "R.drawable.ic_search_no_13",
+            "R.drawable.ic_search_no_14",
+            "R.drawable.ic_search_no_15",
+            "R.drawable.ic_search_no_16",
+            "R.drawable.ic_search_no_17",
+            "R.drawable.ic_search_no_18",
+            "R.drawable.ic_search_no_19",
+            "R.drawable.ic_search_no_20",
+            "R.drawable.ic_recommend_activity",
+            "R.drawable.ic_recommend_discount",
+            "R.drawable.ic_recommend_function",
+            "R.drawable.ic_recommend_gift",
+            "R.drawable.ic_recommend_role",
+            "R.drawable.login_btn_bg",
+            "R.drawable.ic_quick_login_check",
+            "R.drawable.ic_quick_login_uncheck",
+            "R.anim.anim_auth_in",
+            "R.anim.anim_auth_out",
+            "R.id.download_speed",
+            "R.id.download_percentage",
+            "R.id.comment",
+            "R.id.vote",
+            "R.id.watermark_hint",
+            "R.id.watermark_sb",
+            "R.id.bottomShareIv",
+            "R.id.bottomShareTv",
+            "R.id.recommendStarPref",
+            "R.id.recommendStar",
+            "R.drawable.help_search_delete",
+            "R.drawable.suggest_type_normal",
+            "R.drawable.suggest_type_crash",
+            "R.drawable.suggest_type_game_question",
+            "R.drawable.suggest_type_game_collect",
+            "R.drawable.suggest_type_function_suggest",
+            "R.drawable.suggest_type_article_collect",
+            "R.drawable.suggest_type_copyright",
+            "R.drawable.help_result_empty",
+            "R.drawable.news_comment_detail_read",
+            "R.drawable.news_comment_detail_comment",
+            "R.drawable.news_comment_detail_share",
+            "R.drawable.ic_libao",
+            "R.drawable.ic_link",
+            "R.drawable.concern_message_icon",
+            "R.drawable.reuse_blank_hint",
+            "R.drawable.ic_concern",
+            "R.drawable.concern_down",
+            "R.drawable.concern_up",
+            "R.drawable.ic_libao_more",
+            "R.drawable.ic_libao_delete",
+            "R.drawable.ic_dialog_close"
+    ]
+    compressFilePattern = [
+            "*.png",
+            "*.jpg",
+            "*.jpeg",
+            "*.gif",
+    ]
+    sevenzip {
+        artifact = 'com.tencent.mm:SevenZip:1.2.20'
+    }
+}
+
+project.afterEvaluate {
+    def variants = null
+    try {
+        variants = android.applicationVariants
+    } catch (Throwable t) {
+        t.printStackTrace()
+        try {
+            variants = android.libraryVariants
+        } catch (Throwable tt) {
+            tt.printStackTrace()
+        }
+    }
+    if (variants != null) {
+        variants.all { variant ->
+            variant.outputs.each { output ->
+                def task = output.processManifestProvider.get()
+                if (task == null) {
+                    return
+                }
+
+                /**
+                 * 为 Manifest 的 Activity 的 configChanges 添加自己手动处理 configurationChanges 配置 [https://developer.android.com/guide/topics/resources/runtime-changes]
+                 * AGP 4.1.0 从 ProcessManifest task 里拿 manifest 的 API 变更调整可以参考这里 [https://github.com/Tencent/tinker/pull/1476/commits/d71645729b13d545ca4ba6826f93fbf558751434]
+                 * (搞半天还是不会抽离方法，有空再把 gradle 改成用 kotlin 实现吧)
+                 */
+                task.doLast {
+                    def manifestFile = new File(multiApkManifestOutputDirectory.get().asFile, "AndroidManifest.xml")
+                    if (manifestFile == null || !manifestFile.exists()) {
+                        return
+                    }
+
+                    String[] configChanges = [
+                            "density",
+                            "fontScale",
+                            "keyboard",
+                            "keyboardHidden",
+                            "layoutDirection",
+                            "locale",
+                            "mcc",
+                            "mnc",
+                            "navigation",
+                            "orientation",
+                            "screenLayout",
+                            "screenSize",
+                            "smallestScreenSize",
+                            "touchscreen",
+                            "uiMode"]
+
+                    def parser = new XmlSlurper(false, true)
+                    def manifest = parser.parse(manifestFile)
+                    def app = manifest.'application'[0]
+                    app.'activity'.each { act ->
+                        String value = act.attributes()['android:configChanges']
+                        if (value == null || value.isEmpty()) {
+                            if (value == null) value = ""
+                            configChanges.eachWithIndex { config, index ->
+                                if (index != configChanges.length - 1) {
+                                    value += config + "|"
+                                } else {
+                                    value += config
+                                }
+                            }
+                            act.attributes()['androidconfigChanges'] = value
+                        } else {
+                            String[] valueSplit = value.split("\\|")
+                            println configChanges
+                            configChanges.eachWithIndex { config, index ->
+                                if (!valueSplit.contains(config)) {
+                                    value += ("|" + config)
+                                }
+                            }
+                            act.attributes()['android:configChanges'] = value
+                        }
+                    }
+
+                    def tmpManifest = XmlUtil.serialize(manifest).replaceAll("androidconfigChanges", "android:configChanges")
+                    manifest = parser.parseText(tmpManifest)
+                    manifestFile.setText(XmlUtil.serialize(manifest), "utf-8")
+                }
+            }
+        }
+    }
 }

app/proguard-fresco.txt

@@ -0,0 +1,21 @@
+# Keep our interfaces so they can be used by other ProGuard rules.
+# See http://sourceforge.net/p/proguard/bugs/466/
+-keep,allowobfuscation @interface com.facebook.common.internal.DoNotStrip
+
+# Do not strip any method/class that is annotated with @DoNotStrip
+-keep @com.facebook.common.internal.DoNotStrip class *
+-keepclassmembers class * {
+    @com.facebook.common.internal.DoNotStrip *;
+}
+
+# Keep native methods
+-keepclassmembers class * {
+    native <methods>;
+}
+
+-dontwarn okio.**
+-dontwarn com.squareup.okhttp.**
+-dontwarn okhttp3.**
+-dontwarn javax.annotation.**
+-dontwarn com.android.volley.toolbox.**
+-dontwarn com.facebook.infer.**

app/proguard-rules-legacy.txt

@@ -0,0 +1,271 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in C:\Android\sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+#--------- remove logs start  ----------------
+-assumenosideeffects class com.lightgame.config.CommonDebug {
+   private static String getLogTag(...);
+   private static String getMethodName();
+   public static void logMethodName(...);
+   public static void logParams(...);
+   public static void logFields(...);
+   public static void logMethodWithParams(...);
+}
+#-assumenosideeffects class com.lightgame.config.CommonDebug {*;}
+
+#-dontoptimize
+#--------- remove logs end  ----------------
+
+-keepattributes *Annotation*,Signature,InnerClasses,EnclosingMethod
+-dontwarn InnerClasses
+
+# OrmLite uses reflection
+-keep class com.j256.**
+-keepclassmembers class com.j256.** { *; }
+-keep enum com.j256.**
+-keepclassmembers enum com.j256.** { *; }
+-keep interface com.j256.**
+-keepclassmembers interface com.j256.** { *; }
+-dontwarn com.j256.**
+
+#okhttp3
+-dontwarn com.squareup.okhttp3.**
+-dontwarn okio.**
+-keep class com.squareup.okhttp3.** { *;}
+
+# stetho
+-keep class com.facebook.stetho.** { *; }
+-dontwarn com.facebook.stetho.**
+
+# Retrofit 2.2
+# Platform calls Class.forName on types which do not exist on Android to determine platform.
+-dontnote retrofit2.Platform
+# Platform used when running on Java 8 VMs. Will not be used at runtime.
+-dontwarn retrofit2.Platform$Java8
+# Retain generic type information for use by reflection by converters and adapters.
+-keepattributes Signature
+# Retain declared checked exceptions for use by a Proxy instance.
+-keepattributes Exceptions
+
+# Retrofit 2.X
+## https://square.github.io/retrofit/ ##
+
+-dontwarn retrofit2.**
+-keep class retrofit2.** { *; }
+-keepattributes Signature
+-keepattributes Exceptions
+
+-keepclasseswithmembers class * {
+    @retrofit2.http.* <methods>;
+}
+
+
+# rxjava
+-keep class rx.schedulers.Schedulers {
+    public static <methods>;
+}
+-keep class rx.schedulers.ImmediateScheduler {
+    public <methods>;
+}
+-keep class rx.schedulers.TestScheduler {
+    public <methods>;
+}
+-keep class rx.schedulers.Schedulers {
+    public static ** test();
+}
+-keepclassmembers class rx.internal.util.unsafe.*ArrayQueue*Field* {
+    long producerIndex;
+    long consumerIndex;
+}
+-keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueProducerNodeRef {
+    long producerNode;
+    long consumerNode;
+}
+-dontwarn rx.internal.util.**
+
+## AutoScrollViewPager
+-keep class cn.trinea.android.** { *; }
+-keepclassmembers class cn.trinea.android.** { *; }
+-dontwarn cn.trinea.android.**
+
+## butterknife
+# Retain generated class which implement Unbinder.
+#-keep public class * implements butterknife.Unbinder { public <init>(**, android.view.View); }
+#
+## Prevent obfuscation of types which use ButterKnife annotations since the simple name
+## is used to reflectively look up the generated ViewBinding.
+#-keep class butterknife.*
+#-keepclasseswithmembernames class * { @butterknife.* <methods>; }
+#-keepclasseswithmembernames class * { @butterknife.* <fields>; }
+
+-dontwarn butterknife.internal.**
+-keep class **$$ViewInjector { *; }
+-keepnames class * { @butterknife.InjectView *;}
+-dontwarn butterknife.Views$InjectViewProcessor
+-dontwarn com.gc.materialdesign.views.**
+
+# eventbus
+-keepattributes *Annotation*
+-keepclassmembers class ** {
+    @org.greenrobot.eventbus.Subscribe <methods>;
+}
+-keep enum org.greenrobot.eventbus.ThreadMode { *; }
+
+# Only required if you use AsyncExecutor
+-keepclassmembers class * extends org.greenrobot.eventbus.util.ThrowableFailureEvent {
+    <init>(java.lang.Throwable);
+}
+
+# weiboSdk
+-keep class com.sina.weibo.sdk.** { *; }
+-dontwarn android.webkit.WebView
+-dontwarn android.webkit.WebViewClient
+
+# app models
+-keep class com.gh.common.view.** {*;}
+-keep class com.gh.gamecenter.db.info.** {*;}
+-keep class com.gh.gamecenter.entity.** {*;}
+-keep class com.gh.gamecenter.qa.entity.** {*;}
+-keep class com.gh.gamecenter.retrofit.** {*;}
+-keep class com.gh.gamecenter.eventbus.** {*;}
+-keep class com.gh.gamecenter.video.detail.** {*;}
+-keep class * extends rx.Subscriber
+
+#---------------------------------webview------------------------------------
+-keepclassmembers class * extends android.webkit.WebViewClient {
+    public void *(android.webkit.WebView, java.lang.String, android.graphics.Bitmap);
+    public boolean *(android.webkit.WebView, java.lang.String);
+}
+-keepclassmembers class * extends android.webkit.WebViewClient {
+    public void *(android.webkit.WebView, java.lang.String);
+}
+#----------------------------------------------------------------------------
+
+
+##---------------Begin: proguard configuration for Gson  ----------
+# Gson uses generic type information stored in a class file when working with fields. Proguard
+# removes such information by default, so configure it to keep all of it.
+-keepattributes Signature
+
+# For using GSON @Expose annotation
+-keepattributes *Annotation*
+
+# Gson specific classes
+-keep class sun.misc.Unsafe { *; }
+#-keep class com.google.gson.stream.** { *; }
+
+# Prevent proguard from stripping interface information from TypeAdapterFactory,
+# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
+-keep class * implements com.google.gson.TypeAdapterFactory
+-keep class * implements com.google.gson.JsonSerializer
+-keep class * implements com.google.gson.JsonDeserializer
+
+-keepclassmembers enum * { *; }
+
+##---------------End: proguard configuration for Gson  ----------
+
+# ------ bugly ---------
+-dontwarn com.tencent.bugly.**
+-keep public class com.tencent.bugly.**{*;}
+
+# easypermission
+-keepclassmembers class * {
+    @pub.devrel.easypermissions.AfterPermissionGranted <methods>;
+}
+
+# 重命名文件为SourceFile，再配合mapping符号表，可以拿到真实的类名
+-renamesourcefileattribute SourceFile
+# 保留源文件行号
+-keepattributes SourceFile,LineNumberTable
+
+-ignorewarnings
+
+-keep @androidx.annotation.Keep class *
+-keepclassmembers class ** {
+    @androidx.annotation.Keep *;
+}
+
+-keep class com.gh.loghub.** { *; }
+
+### greenDAO 3
+-keepclassmembers class * extends org.greenrobot.greendao.AbstractDao {
+    public static java.lang.String TABLENAME;
+}
+-keep class **$Properties
+-keep class org.greenrobot.greendao.** { *; }
+# If you do not use SQLCipher:
+-dontwarn org.greenrobot.greendao.database.**
+# If you do not use RxJava:
+-dontwarn rx.**
+-dontwarn org.greenrobot.greendao.rx.**
+-dontwarn org.greenrobot.greendao.**
+
+### fastJson
+-dontwarn com.alibaba.fastjson.**
+-keep class com.alibaba.fastjson.** { *; }
+-keepattributes Signature
+-keepattributes Annotation
+
+### 广点通
+-dontwarn com.qq.gdt.action.**
+-keep class com.qq.gdt.action.** {*;}
+
+### AndroidX
+-keep class androidx.core.app.CoreComponentFactory { *; }
+
+#阿里云上传
+-keep class com.alibaba.sdk.android.oss.** { *; }
+-dontwarn okio.**
+-dontwarn org.apache.commons.codec.binary.**
+
+#视频相关
+-keep class com.shuyu.gsyvideoplayer.video.** { *; }
+-dontwarn com.shuyu.gsyvideoplayer.video.**
+-keep class com.shuyu.gsyvideoplayer.video.base.** { *; }
+-dontwarn com.shuyu.gsyvideoplayer.video.base.**
+-keep class com.shuyu.gsyvideoplayer.utils.** { *; }
+-dontwarn com.shuyu.gsyvideoplayer.utils.**
+-keep class tv.danmaku.ijk.** { *; }
+-dontwarn tv.danmaku.ijk.**
+-keep public class * extends android.view.View{
+    *** get*();
+    void set*(***);
+    public <init>(android.content.Context);
+    public <init>(android.content.Context, android.util.AttributeSet);
+    public <init>(android.content.Context, android.util.AttributeSet, int);
+}
+
+#穿山甲
+-keep class com.bytedance.sdk.openadsdk.** { *; }
+-keep public interface com.bytedance.sdk.openadsdk.downloadnew.** {*;}
+-keep class com.pgl.sys.ces.* {*;}
+
+-keep class com.gyf.immersionbar.* {*;}
+-dontwarn com.gyf.immersionbar.**
+
+-keep class com.taobao.securityjni.**{*;}
+-keep class com.taobao.wireless.security.**{*;}
+-keep class com.ut.secbody.**{*;}
+-keep class com.taobao.dp.**{*;}
+-keep class com.alibaba.wireless.security.**{*;}
+
+-keep class com.alibaba.sdk.android.**{*;}
+-keep class com.ut.**{*;}
+-keep class com.ta.**{*;}
+
+-keep class com.gh.gamecenter.GdtHelper { *; }
+-keep class com.gh.gamecenter.TeaHelper { *; }

app/proguard-rules.pro

@@ -1,17 +0,0 @@
-# Add project specific ProGuard rules here.
-# By default, the flags in this file are appended to flags specified
-# in C:\Android\sdk/tools/proguard/proguard-android.txt
-# You can edit the include path and order by changing the proguardFiles
-# directive in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# Add any project specific keep options here:
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}

app/proguard-rules.txt

@@ -0,0 +1,151 @@
+
+#--------- remove logs start  ----------------
+-assumenosideeffects class com.lightgame.config.CommonDebug {
+   private static String getLogTag(...);
+   private static String getMethodName();
+   public static void logMethodName(...);
+   public static void logParams(...);
+   public static void logFields(...);
+   public static void logMethodWithParams(...);
+}
+
+-assumenosideeffects class com.lightgame.utils.Utils {
+   public static void log(...);
+}
+#--------- remove logs end  ----------------
+
+# TODO Dicard sourceFile in final release build but remain in internal build.
+-renamesourcefileattribute SourceFile
+# Keep Attribute
+-keepattributes *Annotation*,Signature,InnerClasses,EnclosingMethod,SourceFile,LineNumberTable
+
+# OrmLite
+-keep class com.j256.*
+-keepclassmembers class com.j256.* { *; }
+-keep enum com.j256.*
+-keepclassmembers enum com.j256.* { *; }
+-keep interface com.j256.*
+-keepclassmembers interface com.j256.* { *; }
+-dontwarn com.j256.**
+
+### AutoScrollViewPager
+-keep class cn.trinea.android.* { *; }
+-keepclassmembers class cn.trinea.android.* { *; }
+-dontwarn cn.trinea.android.**
+
+### Butterknife
+-keep public class * implements butterknife.Unbinder { public <init>(**, android.view.View); }
+-keep class butterknife.*
+-keepclasseswithmembernames class * { @butterknife.* <methods>; }
+-keepclasseswithmembernames class * { @butterknife.* <fields>; }
+
+### eventbus
+-keepclassmembers class * {
+    @org.greenrobot.eventbus.Subscribe <methods>;
+}
+-keep enum org.greenrobot.eventbus.ThreadMode { *; }
+
+### Only required if you use AsyncExecutor
+-keepclassmembers class * extends org.greenrobot.eventbus.util.ThrowableFailureEvent {
+    <init>(java.lang.Throwable);
+}
+
+### weiboSdk
+-keep class com.sina.weibo.sdk.** { *; }
+-dontwarn android.webkit.WebView
+-dontwarn android.webkit.WebViewClient
+
+### wechatSdk
+### TODO 这里用 com.tencent.*{*;} 不起效？但其它地方可以？
+-keep class com.tencent.**{*;}
+
+### app models
+-keep class com.gh.common.view.* {*;}
+-keep class com.gh.gamecenter.db.info.* {*;}
+-keep class com.gh.gamecenter.entity.* {*;}
+-keep class com.gh.gamecenter.qa.entity.* {*;}
+-keep class com.gh.gamecenter.retrofit.* {*;}
+-keep class com.gh.gamecenter.eventbus.* {*;}
+-keep class com.gh.gamecenter.video.detail.* {*;}
+-keep class com.gh.gamecenter.home.gamecollection.* {*;}
+
+###
+-keepclassmembers class * extends android.webkit.WebViewClient {
+    public void *(android.webkit.WebView, java.lang.String, android.graphics.Bitmap);
+    public boolean *(android.webkit.WebView, java.lang.String);
+}
+-keepclassmembers class * extends android.webkit.WebViewClient {
+    public void *(android.webkit.WebView, java.lang.String);
+}
+
+### easypermission
+-keepclassmembers class * {
+    @pub.devrel.easypermissions.AfterPermissionGranted <methods>;
+}
+
+# TODO What's this ?
+-ignorewarnings
+
+### Keep Annotation
+-keep @androidx.annotation.Keep class *
+-keepclassmembers class * {
+    @androidx.annotation.Keep *;
+}
+
+### 广点通
+-dontwarn com.qq.gdt.action.**
+-keep class com.qq.gdt.action.* {*;}
+
+### 阿里云上传
+-keep class com.alibaba.sdk.android.oss.* { *; }
+-dontwarn okio.**
+-dontwarn org.apache.commons.codec.binary.**
+
+### 视频相关
+-keep class com.shuyu.gsyvideoplayer.video.* { *; }
+-dontwarn com.shuyu.gsyvideoplayer.video.**
+-keep class com.shuyu.gsyvideoplayer.video.base.* { *; }
+-dontwarn com.shuyu.gsyvideoplayer.video.base.**
+-keep class com.shuyu.gsyvideoplayer.utils.* { *; }
+-dontwarn com.shuyu.gsyvideoplayer.utils.**
+-keep class tv.danmaku.ijk.* { *; }
+-dontwarn tv.danmaku.ijk.**
+-keep public class * extends android.view.View{
+    *** get*();
+    void set*(***);
+    public <init>(android.content.Context);
+    public <init>(android.content.Context, android.util.AttributeSet);
+    public <init>(android.content.Context, android.util.AttributeSet, int);
+}
+
+-keep class com.alibaba.sdk.android.*{*;}
+-keep class com.ut.*{*;}
+-keep class com.ta.*{*;}
+
+### GDT & TEA
+-keep class com.gh.gamecenter.GdtHelper { *; }
+-keep class com.gh.gamecenter.TeaHelper { *; }
+
+### 阿里云日志
+-keep class com.aliyun.sls.android.producer.* { *; }
+-keep interface com.aliyun.sls.android.producer.* { *; }
+
+### 中国移动一键登录
+-dontwarn com.cmic.sso.sdk.**
+-keep class com.cmic.sso.sdk.* { *; }
+
+### EasyFloat
+-keep class com.lzf.easyfloat.* {*;}
+
+### 避免 WebChromeClient 被混淆
+-keepclassmembers class * extends android.webkit.WebChromeClient{
+    public void openFileChooser(...);
+}
+
+# Flutter模块
+-keep class com.gh.common.util.DirectUtils {
+    public static void directToQa(...);
+    public static void directToQaCollection(...);
+    public static void directToFeedback(...);
+}
+

app/sign.properties

@@ -0,0 +1,4 @@
+storeFile=gh.keystore
+storePassword=20150318
+keyAlias=gh.keystore
+keyPassword=20150318

app/src/androidTest/java/com/gh/gamecenter/ApplicationTest.java

@@ -1,13 +0,0 @@
-package com.gh.gamecenter;
-
-import android.app.Application;
-import android.test.ApplicationTestCase;
-
-/**
- * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
- */
-public class ApplicationTest extends ApplicationTestCase<Application> {
-    public ApplicationTest() {
-        super(Application.class);
-    }
-}

app/src/debug/java/com/gh/gamecenter/Injection.java

@@ -0,0 +1,32 @@
+package com.gh.gamecenter;
+
+import android.app.Application;
+
+
+import okhttp3.OkHttpClient;
+import okhttp3.logging.HttpLoggingInterceptor;
+
+/**
+ * @author CsHeng
+ * @Date 03/09/2017
+ * @Time 4:34 PM
+ */
+
+public class Injection {
+
+    public static boolean appInit(Application application) {
+        // 监控Bundle大小,预防溢出(需要调试的时候再开启吧!)
+//        TooLargeTool.startLogging(application);
+        return true;
+    }
+
+    public static OkHttpClient.Builder provideRetrofitBuilder() {
+        OkHttpClient.Builder builder = new OkHttpClient.Builder();
+        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
+        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
+        builder.addNetworkInterceptor(interceptor);
+        return builder;
+    }
+
+
+}

app/src/gdt/java/com/gh/gamecenter/GdtHelper.kt

@@ -0,0 +1,77 @@
+package com.gh.gamecenter
+
+import android.app.Application
+import android.text.TextUtils
+import android.util.Log
+import com.gh.common.util.ToastUtils
+import com.lightgame.utils.Utils
+import com.qq.gdt.action.GDTAction
+import org.json.JSONObject
+
+/**
+ * 广点通辅助类 [https://gitlab.ghzhushou.com/pm/halo-app-issues/issues/403]
+ *
+ * 更换帐号 [https://gitlab.ghzs.com/pm/yunying/issues/893]
+ */
+object GdtHelper {
+
+    const val NETWORK_TYPE = "NETWORK_TYPE"
+    const val PAGE_TYPE = "PAGE_TYPE"
+    const val CONTENT_TYPE = "CONTENT_TYPE"
+    const val CONTENT_ID = "CONTENT_ID"
+    const val KEYWORD = "KEYWORD"
+    const val GAME_ID = "GAME_ID"
+    const val SCORE = "SCORE"
+    const val PLATFORM = "PLATFORM"
+
+    @JvmStatic
+    fun init(application: Application, channel: String) {
+        if (shouldUseGdtHelper()) {
+            if (channel == "GH_728") {
+                GDTAction.init(application, "1111012969", "9d3d9da5b0948a317c03d08f14d445dc")
+            } else if (channel == "GH_729") {
+                GDTAction.init(application, "1111013063", "f53dabf458a356b101d99fc4069eb7f1")
+            } else if (channel == "GH_765") {
+                GDTAction.init(application, "1111327925", "588d503f0990f98f9b2394fbb795c570")
+            } else {
+                GDTAction.init(application, "1110680399", "f5ddaafbf520d7d7385499232a408d0a")
+            }
+        }
+        Utils.log("init GdtHelper")
+    }
+
+//    fun logAction(type: String) {
+//        if (shouldUseGdtHelper()) {
+//            GDTAction.logAction(type)
+//            Utils.log("GDT", type)
+//        }
+//    }
+    @JvmStatic
+    fun logAction(type: String, vararg kv: String?) {
+        try {
+            val actionParam = JSONObject()
+            for (i in kv.indices) {
+                if (i % 2 != 0) {
+                    val key = kv[i - 1]
+                    val value = kv[i]
+                    if (!TextUtils.isEmpty(key) && !TextUtils.isEmpty(value)) {
+                        actionParam.put(key, value)
+                    }
+                }
+            }
+            Utils.log("GDT", "$type + [${kv.joinToString(" , ")}]")
+            GDTAction.logAction(type, actionParam)
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+    }
+
+    // TODO 确认开启的渠道条件
+    private fun shouldUseGdtHelper(): Boolean {
+        return true
+//
+//        val channel = HaloApp.getInstance().channel
+//        return !(TextUtils.isEmpty(channel) || channel.contains("GDT".toLowerCase(Locale.CHINA)))
+    }
+
+}

app/src/main/assets/content.js

@@ -0,0 +1,163 @@
+function requestContentFocus() {
+  $("#editor").focus();
+}
+
+function setupWhenContentEditable() {
+  var editor = $("#editor");
+  if (!editor[0].hasAttribute("contenteditable")) {
+    return;
+  }
+
+  // paste
+  editor.on("paste", function(e) {
+    e.preventDefault();
+    var text = (e.originalEvent || e).clipboardData.getData("text/plain");
+    text = text.replace(/\n/g, "<br>");
+    if ("" != text) {
+      document.execCommand("insertHTML", false, text);
+    } else {
+      window.onPasteListener.onPaste();
+    }
+  });
+
+  requestContentFocus();
+}
+
+function getStyle(dom, name) {
+  return window.getComputedStyle(dom)[name];
+}
+
+function customLinkgo(self) {
+  var datas = self.dataset.datas;
+  console.log(datas)
+  window.OnLinkClickListener.onClick(datas);
+}
+
+var typeClassList = [
+  "community_article-container",
+  "answer-container",
+  "game-container"
+];
+
+function removeDomByParent(curDom) {
+  if (curDom.parentElement) {
+    curDom.parentElement.removeChild(curDom);
+  }
+}
+
+window.addEventListener("load", function() {
+  var EditorDom = document.querySelector("#editor");
+  setupWhenContentEditable();
+
+  document.addEventListener("keydown", function(e) {
+    var event = e || window.event;
+
+    if (event.keyCode === 8) {
+      var s = document.getSelection();
+      var r = s.getRangeAt(0);
+
+      if (r.startOffset === r.endOffset && r.endOffset === 0) {
+        var preDOM = s.focusNode.previousElementSibling;
+
+        if (
+          preDOM &&
+          preDOM instanceof Element &&
+          preDOM.nodeName === "IMG" &&
+          getStyle(preDOM, "display") === "block"
+        ) {
+          preDOM.parentElement.removeChild(preDOM);
+        }
+      }
+
+      var customDom = s.focusNode;
+      if (customDom) {
+        if (
+          r.startContainer.nodeName.toLowerCase() === "blockquote" &&
+          r.startOffset === 0
+        ) {
+          RE.formatBlock();
+          e.preventDefault();
+        } else if (
+          customDom.nodeName === "#text" &&
+          customDom.previousElementSibling &&
+          typeClassList.indexOf(customDom.previousElementSibling.className) >
+            -1 &&
+          r.startOffset === 1
+        ) {
+          var needDeleteDom = customDom.previousElementSibling;
+          needDeleteDom.insertAdjacentElement(
+            "afterend",
+            document.createElement("br")
+          );
+        } else if (
+          customDom instanceof Element &&
+          customDom.childNodes[s.focusOffset] &&
+          customDom.childNodes[s.focusOffset].previousElementSibling &&
+          typeClassList.indexOf(
+            customDom.childNodes[s.focusOffset].previousElementSibling.className
+          ) > -1
+        ) {
+          customDom =
+            customDom.childNodes[s.focusOffset].previousElementSibling;
+          customDom.parentElement.removeChild(customDom);
+        }
+      }
+    }
+  });
+
+  document.addEventListener("keyup", function(e) {
+    var event = e || window.event;
+    if (event.keyCode === 13) {
+      var s = document.getSelection();
+      var curDom = s.focusNode;
+      var preDom = curDom.previousElementSibling;
+
+      if (
+        curDom.nodeName.toLowerCase() === "blockquote" &&
+        preDom.nodeName.toLowerCase() === "blockquote"
+      ) {
+        if (
+          preDom.childNodes.length > 1 ||
+          (preDom.childNodes.length === 1 &&
+            preDom.childNodes[0].tagName !== "BR")
+        ) {
+          curDom.style.marginTop = 0;
+          preDom.style.marginBottom = 0;
+        } else if (
+          (curDom.childNodes.length === 0 ||
+            (curDom.childNodes.length === 1 &&
+              curDom.childNodes[0].tagName === "BR")) &&
+          (preDom.childNodes.length === 0 ||
+            (preDom.childNodes.length === 1 &&
+              preDom.childNodes[0].tagName === "BR"))
+        ) {
+
+          removeDomByParent(curDom);
+
+          var startQuoteDom = preDom.previousElementSibling;
+          startQuoteDom && startQuoteDom.nodeName.toLowerCase() === "blockquote"
+            ? (startQuoteDom.style.marginBottom = "10px")
+            : null;
+
+          var range = document.createRange();
+          range.selectNode(preDom);
+          s.removeAllRanges();
+          s.addRange(range);
+
+          RE.formatBlock();
+        }
+      }
+    }
+  });
+
+  document.addEventListener("selectionchange", function(e) {
+    var event = e || window.event;
+    var targetDom = event.target.activeElement;
+    if (targetDom.id === "editor" && targetDom.lastElementChild) {
+      if (typeClassList.indexOf(targetDom.lastElementChild.className) > -1) {
+        var brDom = document.createElement("br");
+        EditorDom.appendChild(brDom);
+      }
+    }
+  });
+});

app/src/main/assets/editor.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
+    <link rel="stylesheet" type="text/css" href="normalize.css">
+    <link rel="stylesheet" type="text/css" href="style.css">
+    <link rel="stylesheet" type="text/css" href="video-js.min.css">
+<!--    <link rel="stylesheet" href="https://static-web.ghzs.com/website-static/lib/video-js.min.css">--> <!--在web页面播放视频-->
+    <!--<link rel="stylesheet" type="text/css" href="https://resource.ghzs.com/css/halo_app.css">-->
+</head>
+
+<body style="overflow-x: hidden; word-break: break-all;">
+<div id="editor" contenteditable="false"></div>
+<script type="text/javascript" src="zepto.min.js"></script>
+<script type="text/javascript" src="rich_editor.js"></script>
+<script type="text/javascript" src="video.min.js"></script>
+<!--<script src="https://static-web.ghzs.com/website-static/lib/video.min.js"></script>--> <!--在web页面播放视频-->
+<!--<script type="text/javascript" src="content.js"></script>-->
+<!--<script type="text/javascript" src="https://resource.ghzs.com/js/halo_app.js"></script>-->
+</body>
+</html>

app/src/main/assets/lottie/click_guide.json

@@ -0,0 +1 @@
+{"v":"5.5.9","fr":60,"ip":0,"op":90,"w":1080,"h":202,"nm":"click","ddd":0,"assets":[{"id":"comp_0","layers":[{"ddd":0,"ind":1,"ty":4,"nm":"椭圆形","sr":1,"ks":{"o":{"a":0,"k":20,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[204,1455,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":0,"k":[100,100,100],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[24,24],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"nm":"椭圆路径 1","mn":"ADBE Vector Shape - Ellipse","hd":false},{"ty":"fl","c":{"a":0,"k":[1,1,1,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"填充 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"椭圆形","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":120,"st":0,"bm":0},{"ddd":0,"ind":2,"ty":4,"nm":"椭圆形","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.833],"y":[0.833]},"o":{"x":[0.167],"y":[0.167]},"t":63,"s":[10]},{"t":70,"s":[0]}],"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[204,1455,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.833,0.833,0.833],"y":[0.833,0.833,0.833]},"o":{"x":[0.167,0.167,0.167],"y":[0.167,0.167,0.167]},"t":39,"s":[100,100,100]},{"t":49,"s":[110,110,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[36,36],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"nm":"椭圆路径 1","mn":"ADBE Vector Shape - Ellipse","hd":false},{"ty":"fl","c":{"a":0,"k":[1,1,1,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"填充 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"椭圆形","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":120,"st":0,"bm":0}]}],"layers":[{"ddd":0,"ind":1,"ty":0,"nm":"圆环","refId":"comp_0","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.531],"y":[0]},"t":28,"s":[0]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"t":38,"s":[100]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.526],"y":[0]},"t":48,"s":[100]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.446],"y":[0]},"t":63,"s":[50]},{"t":82,"s":[0]}],"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[125.951,79.658,0],"ix":2},"a":{"a":0,"k":[205.951,1458.658,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.601,0.601,0.333],"y":[0,0,0]},"t":28,"s":[50,50,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.528,0.528,0.333],"y":[0,0,0]},"t":38,"s":[100,100,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.526,0.526,0.333],"y":[0,0,0]},"t":48,"s":[120,120,100]},{"t":63,"s":[100,100,100]}],"ix":6}},"ao":0,"w":1080,"h":1920,"ip":0,"op":120,"st":0,"bm":0},{"ddd":0,"ind":2,"ty":4,"nm":"点击手","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.596],"y":[0]},"t":0,"s":[0]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"t":10,"s":[100]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.515],"y":[0]},"t":63,"s":[100]},{"t":83,"s":[0]}],"ix":11},"r":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.507],"y":[0]},"t":10,"s":[6]},{"t":30,"s":[2]}],"ix":10},"p":{"a":0,"k":[178.982,123.325,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.489,0.489,0.333],"y":[0,0,0]},"t":10,"s":[100,100,100]},{"t":30,"s":[90,90,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[-5.33,-8.3],[3.89,0.27],[-4.4,-1.68],[-4.33,-0.67],[-4.08,9.32],[3.33,5.44],[3.39,4.6],[0.87,-3.7],[3.6,-0.86],[1.03,-0.21],[2.34,-0.53],[0.96,1.15],[4.22,5.48],[-1.18,-4.56]],"o":[[1.11,1.71],[-3.89,-0.27],[6.42,2.5],[4.33,0.66],[1.63,-5.32],[-3.34,-5.45],[-1.68,-2.1],[-0.71,3.14],[-3.43,0.95],[-0.57,0.08],[-3.86,1.12],[-3.23,-3.94],[-1.89,-2.28],[2.42,4.64]],"v":[[-5.387,9.698],[-10.717,8.498],[-12.327,15.628],[5.813,21.748],[23.313,11.778],[20.273,-1.202],[11.563,-13.962],[5.393,-12.362],[1.083,-13.722],[-2.087,-9.742],[-5.707,-11.752],[-8.777,-7.572],[-18.297,-20.542],[-23.827,-17.832]],"c":true},"ix":2},"nm":"路径 1","mn":"ADBE Vector Shape - Group","hd":false},{"ty":"fl","c":{"a":0,"k":[1,1,1,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"填充 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"路径备份 2","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":120,"st":0,"bm":0}],"markers":[]}

app/src/main/assets/lottie/double_click_guide.json

@@ -0,0 +1 @@
+{"v":"5.6.4","fr":25,"ip":0,"op":35,"w":1080,"h":214,"nm":"点赞","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"椭圆形 2","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.588],"y":[0]},"t":17,"s":[15]},{"t":20,"s":[0]}],"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[468.04,73.68,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.659,0.659,0.333],"y":[0,0,0]},"t":10,"s":[50,50,100]},{"t":19,"s":[150,150,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[24,24],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"nm":"椭圆路径 1","mn":"ADBE Vector Shape - Ellipse","hd":false},{"ty":"fl","c":{"a":0,"k":[1,1,1,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"填充 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"椭圆形","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":10,"op":1510,"st":10,"bm":0},{"ddd":0,"ind":2,"ty":4,"nm":"椭圆形 3","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.588],"y":[0]},"t":27,"s":[15]},{"t":30,"s":[0]}],"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[468.04,73.68,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.659,0.659,0.333],"y":[0,0,0]},"t":20,"s":[50,50,100]},{"t":28,"s":[140,140,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[24,24],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"nm":"椭圆路径 1","mn":"ADBE Vector Shape - Ellipse","hd":false},{"ty":"fl","c":{"a":0,"k":[1,1,1,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"填充 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"椭圆形","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":20,"op":1520,"st":20,"bm":0},{"ddd":0,"ind":3,"ty":4,"nm":"路径备份 2","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.602],"y":[0]},"t":0,"s":[0]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"t":5,"s":[100]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.663],"y":[0]},"t":24,"s":[100]},{"t":29,"s":[0]}],"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[531.02,129.675,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.514,0.514,0.333],"y":[0,0,0]},"t":5,"s":[100,100,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.533,0.533,0.333],"y":[0,0,0]},"t":10,"s":[90,90,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.586,0.586,0.333],"y":[0,0,0]},"t":15,"s":[95,95,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.499,0.499,0.333],"y":[0,0,0]},"t":19,"s":[90,90,100]},{"t":24,"s":[100,100,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[-5.33,-8.3],[3.89,0.27],[-4.4,-1.68],[-4.33,-0.67],[-4.08,9.32],[3.33,5.44],[3.39,4.6],[0.87,-3.7],[3.6,-0.86],[1.03,-0.21],[2.34,-0.53],[0.96,1.15],[4.22,5.48],[-1.18,-4.56]],"o":[[1.11,1.71],[-3.89,-0.27],[6.42,2.5],[4.33,0.66],[1.63,-5.32],[-3.34,-5.45],[-1.68,-2.1],[-0.71,3.14],[-3.43,0.95],[-0.57,0.08],[-3.86,1.12],[-3.23,-3.94],[-1.89,-2.28],[2.42,4.64]],"v":[[-5.387,9.698],[-10.717,8.498],[-12.327,15.628],[5.813,21.748],[23.313,11.778],[20.273,-1.202],[11.563,-13.962],[5.393,-12.362],[1.083,-13.722],[-2.087,-9.742],[-5.707,-11.752],[-8.777,-7.572],[-18.297,-20.542],[-23.827,-17.832]],"c":true},"ix":2},"nm":"路径 1","mn":"ADBE Vector Shape - Group","hd":false},{"ty":"fl","c":{"a":0,"k":[1,1,1,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"填充 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"路径备份 2","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":1500,"st":0,"bm":0}],"markers":[]}

app/src/main/assets/lottie/slide_guide.json

@@ -0,0 +1 @@
+{"v":"5.5.9","fr":60,"ip":0,"op":120,"w":1080,"h":586,"nm":"上滑","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":2,"ty":4,"nm":"手","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.642],"y":[0]},"t":0,"s":[0]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.333],"y":[0]},"t":6,"s":[100]},{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.558],"y":[0]},"t":60,"s":[100]},{"t":71,"s":[0]}],"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":1,"k":[{"i":{"x":0.667,"y":1},"o":{"x":0.479,"y":0},"t":3,"s":[611,475,0],"to":[0,-62.75,0],"ti":[0,62.75,0]},{"t":40,"s":[611,98.5,0]}],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":0,"k":[90,90,100],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[-7.78,-12.06],[5.68,0.39],[-6.42,-2.45],[-6.32,-0.97],[-5.95,13.55],[4.87,7.91],[4.94,6.69],[1.26,-5.37],[5.25,-1.25],[1.5,-0.3],[3.4,-0.77],[1.4,1.68],[6.15,7.98],[-1.73,-6.64]],"o":[[1.62,2.49],[-5.68,-0.39],[9.37,3.63],[6.31,0.98],[2.39,-7.74],[-4.87,-7.92],[-2.45,-3.05],[-1.05,4.57],[-4.99,1.39],[-0.83,0.13],[-5.63,1.63],[-4.71,-5.72],[-2.75,-3.31],[3.52,6.76]],"v":[[-7.86,14.26],[-15.64,12.52],[-17.99,22.89],[8.47,31.78],[33.98,17.29],[29.55,-1.59],[16.85,-20.15],[7.86,-17.83],[1.56,-19.8],[-3.05,-14.02],[-8.33,-16.94],[-12.44,-11.045],[-26.761,-30.19],[-34.75,-25.78]],"c":true},"ix":2},"nm":"路径 1","mn":"ADBE Vector Shape - Group","hd":false},{"ty":"fl","c":{"a":0,"k":[1,1,1,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"填充 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"路径","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":120,"st":0,"bm":0},{"ddd":0,"ind":3,"ty":4,"nm":"矩形","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.715],"y":[0]},"t":57,"s":[100]},{"t":67,"s":[0]}],"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[525,228.5,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":0,"k":[100,100,100],"ix":6}},"ao":0,"hasMask":true,"masksProperties":[{"inv":false,"mode":"a","pt":{"a":1,"k":[{"i":{"x":0.667,"y":1},"o":{"x":0.491,"y":0},"t":3,"s":[{"i":[[0,0],[0,0],[0,0],[0,0]],"o":[[0,0],[0,0],[0,0],[0,0]],"v":[[24.328,180.5],[-22,180.5],[-22,204.5],[24.328,204.5]],"c":true}]},{"t":40,"s":[{"i":[[0,0],[0,0],[0,0],[0,0]],"o":[[0,0],[0,0],[0,0],[0,0]],"v":[[24.328,-207.5],[-22,-207.5],[-22,204.5],[24.328,204.5]],"c":true}]}],"ix":1},"o":{"a":0,"k":100,"ix":3},"x":{"a":0,"k":0,"ix":4},"nm":"蒙版 1"}],"shapes":[{"ty":"gr","it":[{"ty":"rc","d":1,"s":{"a":0,"k":[6,137],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"r":{"a":0,"k":2,"ix":4},"nm":"矩形路径 1","mn":"ADBE Vector Shape - Rect","hd":false},{"ty":"gf","o":{"a":0,"k":100,"ix":10},"r":1,"bm":0,"g":{"p":3,"k":{"a":0,"k":[0,1,1,1,0.5,1,1,1,1,1,1,1,0,1,0.5,0.5,1,0],"ix":9}},"s":{"a":0,"k":[0,-68.5],"ix":5},"e":{"a":0,"k":[0,68.5],"ix":6},"t":1,"nm":"Gradient Fill 1","mn":"ADBE Vector Graphic - G-Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"矩形","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false},{"ty":"tm","s":{"a":0,"k":0,"ix":1},"e":{"a":0,"k":100,"ix":2},"o":{"a":0,"k":33,"ix":3},"m":1,"ix":2,"nm":"修剪路径 1","mn":"ADBE Vector Filter - Trim","hd":false}],"ip":3,"op":123,"st":3,"bm":0}],"markers":[]}

app/src/main/assets/lottie/tab_forum.json

@@ -0,0 +1 @@
+{"v":"5.6.9","fr":30,"ip":0,"op":20,"w":66,"h":66,"nm":"bottom bar tab/论坛/选中/E","ddd":0,"assets":[{"id":"comp_0","layers":[{"ddd":0,"ind":1,"ty":4,"nm":"白-修正","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[33,33,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.333,0.333,0.333],"y":[0,0,0]},"t":0,"s":[100,100,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.333,0.333,0.333],"y":[0,0,0]},"t":4,"s":[80,80,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.333,0.333,0.333],"y":[0,0,0]},"t":9,"s":[110,110,100]},{"t":13,"s":[100,100,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":1,"k":[{"i":{"x":0.667,"y":1},"o":{"x":1,"y":0},"t":0,"s":[{"i":[[0,-0.66],[0,0],[1.38,0],[0,1.38],[0,0],[-0.66,0],[0,0]],"o":[[0,0],[0,1.38],[-1.38,0],[0,0],[0,-0.66],[0,0],[0.66,0]],"v":[[2.5,-1.3],[2.5,0],[0,2.5],[-2.5,0],[-2.5,-1.3],[-1.3,-2.5],[1.3,-2.5]],"c":true}]},{"i":{"x":0,"y":1},"o":{"x":0.333,"y":0},"t":4,"s":[{"i":[[0,-0.66],[0,0],[1.38,0],[0,1.38],[0,0],[-0.66,0],[0,0]],"o":[[0,0],[0,1.38],[-1.38,0],[0,0],[0,-0.66],[0,0],[0.66,0]],"v":[[2.5,-0.102],[2.5,0],[0,2.109],[-2.5,0],[-2.5,-0.102],[-1.3,-1.302],[1.3,-1.302]],"c":true}]},{"i":{"x":0.667,"y":1},"o":{"x":1,"y":0},"t":9,"s":[{"i":[[0,-0.66],[0,0],[1.38,0],[0,1.38],[0,0],[-0.66,0],[0,0]],"o":[[0,0],[0,1.38],[-1.38,0],[0,0],[0,-0.66],[0,0],[0.66,0]],"v":[[2.498,-1.845],[2.5,0],[0,2.734],[-2.5,0],[-2.502,-1.845],[-1.302,-3.045],[1.298,-3.045]],"c":true}]},{"t":13,"s":[{"i":[[0,-0.66],[0,0],[1.38,0],[0,1.38],[0,0],[-0.66,0],[0,0]],"o":[[0,0],[0,1.38],[-1.38,0],[0,0],[0,-0.66],[0,0],[0.66,0]],"v":[[2.5,-1.3],[2.5,0],[0,2.5],[-2.5,0],[-2.5,-1.3],[-1.3,-2.5],[1.3,-2.5]],"c":true}]}],"ix":2},"nm":"路径 1","mn":"ADBE Vector Shape - Group","hd":false},{"ty":"fl","c":{"a":0,"k":[1,1,1,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"填充 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"矩形","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":150,"st":0,"bm":0},{"ddd":0,"ind":3,"ty":4,"nm":"蓝","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[33,33.76,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":0,"k":[100,100,100],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[-1.8,0.42],[-3.44,-0.79],[-0.09,-1.71],[0,0],[0,0],[1.98,-0.1],[0,0],[0,0],[0,0],[0.62,0.57],[0,0],[0,0],[0,0],[0,0],[0,0],[0.2,1.89],[0,0],[0,0],[0,0]],"o":[[3.44,-0.79],[1.74,0.41],[0,0],[0,0],[0,2],[0,0],[0,0],[0,0],[-0.69,0.52],[0,0],[0,0],[0,0],[0,0],[0,0],[-1.94,0],[0,0],[0,0],[0,0],[0,-1.8]],"v":[[-6.39,-8.971],[6.39,-8.971],[9.49,-5.471],[9.5,-5.271],[9.5,3.249],[5.95,6.989],[5.75,6.999],[3.25,6.999],[0.3,9.209],[-1.95,9.089],[-2.06,8.969],[-2.17,8.849],[-2.21,8.779],[-3.4,6.999],[-5.75,6.999],[-9.48,3.639],[-9.49,3.449],[-9.5,3.249],[-9.5,-5.271]],"c":true},"ix":2},"nm":"路径 1","mn":"ADBE Vector Shape - Group","hd":false},{"ty":"gf","o":{"a":0,"k":100,"ix":10},"r":1,"bm":0,"g":{"p":3,"k":{"a":0,"k":[0,0.266,0.638,1,0.5,0.242,0.595,1,1,0.217,0.552,1],"ix":9}},"s":{"a":0,"k":[-9.5,-9.561],"ix":5},"e":{"a":0,"k":[9.5,9.561],"ix":6},"t":1,"nm":"color","mn":"ADBE Vector Graphic - G-Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"路径","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":150,"st":0,"bm":0}]}],"layers":[{"ddd":0,"ind":1,"ty":0,"nm":"预合成 1","refId":"comp_0","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[33,33,0],"ix":2},"a":{"a":0,"k":[33,33,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.833,0.833,0.833],"y":[0.833,0.833,0.833]},"o":{"x":[0.167,0.167,0.167],"y":[0.167,0.167,0.167]},"t":0,"s":[100,100,100]},{"i":{"x":[0.833,0.833,0.833],"y":[0.833,0.833,0.833]},"o":{"x":[0.167,0.167,0.167],"y":[0.167,0.167,0.167]},"t":4,"s":[70,70,100]},{"i":{"x":[0.833,0.833,0.833],"y":[0.833,0.833,0.833]},"o":{"x":[0.167,0.167,0.167],"y":[0.167,0.167,0.167]},"t":9,"s":[110,110,100]},{"i":{"x":[0.833,0.833,0.833],"y":[0.833,0.833,0.833]},"o":{"x":[0.167,0.167,0.167],"y":[0.167,0.167,0.167]},"t":13,"s":[90,90,100]},{"t":16,"s":[100,100,100]}],"ix":6}},"ao":0,"w":66,"h":66,"ip":0,"op":20,"st":0,"bm":0}],"markers":[]}

app/src/main/assets/lottie/tab_home.json

@@ -0,0 +1 @@
+{"v":"5.5.9","fr":30,"ip":0,"op":20,"w":66,"h":66,"nm":"tab_index","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"椭圆形备份","sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.596],"y":[0]},"t":0,"s":[0]},{"t":6,"s":[100]}],"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[33,40.493,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.167,0.167,0.167],"y":[0,0,0]},"t":0,"s":[100,100,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.54,0.54,0.333],"y":[0,0,0]},"t":4,"s":[80,80,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.555,0.555,0.333],"y":[0,0,0]},"t":9,"s":[110,110,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.552,0.552,0.333],"y":[0,0,0]},"t":13,"s":[90,90,100]},{"t":16,"s":[100,100,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[5,5],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"nm":"椭圆路径 1","mn":"ADBE Vector Shape - Ellipse","hd":false},{"ty":"tm","s":{"a":0,"k":0,"ix":1},"e":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.635],"y":[0]},"t":0,"s":[0]},{"t":8,"s":[100]}],"ix":2},"o":{"a":0,"k":0,"ix":3},"m":1,"ix":2,"nm":"修剪路径 1","mn":"ADBE Vector Filter - Trim","hd":false},{"ty":"st","c":{"a":0,"k":[1,1,1,1],"ix":3},"o":{"a":0,"k":100,"ix":4},"w":{"a":0,"k":1.5,"ix":5},"lc":2,"lj":1,"ml":4,"bm":0,"nm":"描边 1","mn":"ADBE Vector Graphic - Stroke","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"椭圆形备份","np":3,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":-0.5,"op":59.5,"st":-0.5,"bm":0},{"ddd":0,"ind":2,"ty":4,"nm":"路径备份","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[33,32.993,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.508,0.508,0.333],"y":[0,0,0]},"t":0,"s":[100,100,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.488,0.488,0.333],"y":[0,0,0]},"t":4,"s":[80,80,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.502,0.502,0.333],"y":[0,0,0]},"t":9,"s":[110,110,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.534,0.534,0.333],"y":[0,0,0]},"t":13,"s":[95,95,100]},{"t":16,"s":[100,100,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[-1.24,-1.21],[-1.93,-1.89],[-0.24,-0.57],[0,-0.06],[0,-2.63],[1.76,0],[0,0],[0,1.72],[0,2.63],[-0.24,0.61],[-0.03,0.02],[-1.93,1.89]],"o":[[1.92,1.89],[0.02,0.02],[0.24,0.57],[0,2.63],[0,1.72],[0,0],[-1.76,0],[0,-2.62],[0,-0.07],[0.25,-0.61],[1.92,-1.89],[1.24,-1.21]],"v":[[2.26,-9.09],[8.03,-3.42],[8.76,-2.38],[9,-1.02],[9,6.88],[5.82,10],[-5.82,10],[-9,6.88],[-9,-0.99],[-8.71,-2.38],[-8.01,-3.43],[-2.23,-9.09]],"c":true},"ix":2},"nm":"路径 1","mn":"ADBE Vector Shape - Group","hd":false},{"ty":"gf","o":{"a":0,"k":100,"ix":10},"r":1,"bm":0,"g":{"p":3,"k":{"a":0,"k":[0,0.266,0.638,1,0.5,0.242,0.595,1,1,0.217,0.552,1],"ix":9}},"s":{"a":0,"k":[-4.902,-4.663],"ix":5},"e":{"a":0,"k":[8.159,8.646],"ix":6},"t":1,"nm":"Gradient Fill 1","mn":"ADBE Vector Graphic - G-Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"路径备份","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":60,"st":0,"bm":0}],"markers":[]}

app/src/main/assets/lottie/tab_video.json

@@ -0,0 +1 @@
+{"v":"5.5.9","fr":30,"ip":0,"op":20,"w":66,"h":66,"nm":"tab_video","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"形状图层 1","parent":2,"sr":1,"ks":{"o":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.771],"y":[0]},"t":0,"s":[0]},{"t":5,"s":[100]}],"ix":11},"r":{"a":0,"k":90,"ix":10},"p":{"a":0,"k":[-3.742,6.835,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":0,"k":[30.937,31.042,100],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ty":"sr","sy":2,"d":1,"pt":{"a":0,"k":3,"ix":3},"p":{"a":0,"k":[0,0],"ix":4},"r":{"a":0,"k":0,"ix":5},"or":{"a":0,"k":29.286,"ix":7},"os":{"a":0,"k":75,"ix":9},"ix":1,"nm":"多边星形路径 1","mn":"ADBE Vector Shape - Star","hd":false},{"ty":"st","c":{"a":0,"k":[1,1,1,1],"ix":3},"o":{"a":0,"k":100,"ix":4},"w":{"a":0,"k":13,"ix":5},"lc":1,"lj":1,"ml":4,"bm":0,"nm":"描边 1","mn":"ADBE Vector Graphic - Stroke","hd":false},{"ty":"tr","p":{"a":0,"k":[-20.75,-13.25],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[102.743,88.578],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"多边星形 1","np":3,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false},{"ty":"tm","s":{"a":0,"k":0,"ix":1},"e":{"a":1,"k":[{"i":{"x":[0.667],"y":[1]},"o":{"x":[0.657],"y":[0]},"t":0,"s":[0]},{"t":8,"s":[100]}],"ix":2},"o":{"a":0,"k":-115,"ix":3},"m":1,"ix":2,"nm":"修剪路径 1","mn":"ADBE Vector Filter - Trim","hd":false}],"ip":0,"op":60,"st":0,"bm":0},{"ddd":0,"ind":2,"ty":4,"nm":"路径 2","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[33,33.004,0],"ix":2},"a":{"a":0,"k":[0,0,0],"ix":1},"s":{"a":1,"k":[{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.508,0.508,0.333],"y":[0,0,0]},"t":0,"s":[100,100,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.488,0.488,0.333],"y":[0,0,0]},"t":4,"s":[80,80,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.502,0.502,0.333],"y":[0,0,0]},"t":9,"s":[110,110,100]},{"i":{"x":[0.667,0.667,0.667],"y":[1,1,1]},"o":{"x":[0.534,0.534,0.333],"y":[0,0,0]},"t":13,"s":[95,95,100]},{"t":16,"s":[100,100,100]}],"ix":6}},"ao":0,"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[0,0],[2.16,0.38],[3.22,-0.55],[0.38,-2.16],[-0.55,-3.22],[-2.16,-0.38],[-1.63,0],[-1.61,0.27],[-0.38,2.16],[0.55,3.22]],"o":[[-0.38,-2.16],[-3.22,-0.55],[-2.16,0.38],[-0.55,3.22],[0.38,2.16],[1.61,0.27],[1.63,0],[2.16,-0.38],[0.55,-3.22],[0,0]],"v":[[9.09,-4.86],[4.86,-9.09],[-4.86,-9.09],[-9.09,-4.86],[-9.09,4.86],[-4.86,9.09],[0,9.5],[4.86,9.09],[9.09,4.86],[9.09,-4.86]],"c":true},"ix":2},"nm":"路径 1","mn":"ADBE Vector Shape - Group","hd":false},{"ty":"gf","o":{"a":0,"k":100,"ix":10},"r":1,"bm":0,"g":{"p":3,"k":{"a":0,"k":[0,0.266,0.638,1,0.5,0.242,0.595,1,1,0.217,0.552,1],"ix":9}},"s":{"a":0,"k":[-5.174,-4.43],"ix":5},"e":{"a":0,"k":[8.612,8.214],"ix":6},"t":1,"nm":"Gradient Fill 3","mn":"ADBE Vector Graphic - G-Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[0,0],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[300,300],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"变换"}],"nm":"路径","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":60,"st":0,"bm":0}],"markers":[]}

app/src/main/assets/normalize.css

@@ -0,0 +1,413 @@
+/*! normalize.css v3.0.2 | MIT License | git.io/normalize */
+
+/**
+ * 1. Set default font family to sans-serif.
+ * 2. Prevent iOS text size adjust after orientation change, without disabling
+ *    user zoom.
+ */
+
+html {
+  font-family: sans-serif; /* 1 */
+  -webkit-text-size-adjust: 100%; /* 2 */
+}
+
+/**
+ * Remove default margin.
+ */
+
+body {
+  margin: 0;
+}
+
+/* HTML5 display definitions
+   ========================================================================== */
+
+/**
+ * Correct `block` display not defined for any HTML5 element in IE 8/9.
+ * Correct `block` display not defined for `details` or `summary` in IE 10/11
+ * and Firefox.
+ * Correct `block` display not defined for `main` in IE 11.
+ */
+
+article,
+aside,
+details,
+figcaption,
+figure,
+footer,
+header,
+hgroup,
+main,
+menu,
+nav,
+section,
+summary {
+  display: block;
+}
+
+/**
+ * 1. Correct `inline-block` display not defined in IE 8/9.
+ * 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
+ */
+
+audio,
+canvas,
+progress,
+video {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
+/**
+ * Prevent modern browsers from displaying `audio` without controls.
+ * Remove excess height in iOS 5 devices.
+ */
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
+/**
+ * Address `[hidden]` styling not present in IE 8/9/10.
+ * Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
+ */
+
+[hidden],
+template {
+  display: none;
+}
+
+/* Links
+   ========================================================================== */
+
+/**
+ * Remove the gray background color from active links in IE 10.
+ */
+
+a {
+  background-color: transparent;
+}
+
+/**
+ * Improve readability when focused and also mouse hovered in all browsers.
+ */
+
+a:active,
+a:hover {
+  outline: 0;
+}
+
+/* Text-level semantics
+   ========================================================================== */
+
+/**
+ * Address styling not present in IE 8/9/10/11, Safari, and Chrome.
+ */
+
+abbr[title] {
+  border-bottom: 1px dotted;
+}
+
+/**
+ * Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
+ */
+
+b,
+strong {
+  font-weight: bold;
+}
+
+/**
+ * Address styling not present in Safari and Chrome.
+ */
+
+dfn {
+  font-style: italic;
+}
+
+/**
+ * Address variable `h1` font-size and margin within `section` and `article`
+ * contexts in Firefox 4+, Safari, and Chrome.
+ */
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+/**
+ * Address styling not present in IE 8/9.
+ */
+
+mark {
+  background: #ff0;
+  color: #000;
+}
+
+/**
+ * Address inconsistent and variable font size in all browsers.
+ */
+
+small {
+  font-size: 80%;
+}
+
+/**
+ * Prevent `sub` and `sup` affecting `line-height` in all browsers.
+ */
+
+sub,
+sup {
+  font-size: 75%;
+  line-height: 0;
+  position: relative;
+  vertical-align: baseline;
+}
+
+sup {
+  top: -0.5em;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+/* Embedded content
+   ========================================================================== */
+
+/**
+ * Remove border when inside `a` element in IE 8/9/10.
+ */
+
+img {
+  border: 0;
+}
+
+/**
+ * Correct overflow not hidden in IE 9/10/11.
+ */
+
+svg:not(:root) {
+  overflow: hidden;
+}
+
+/* Grouping content
+   ========================================================================== */
+
+/**
+ * Address margin not present in IE 8/9 and Safari.
+ */
+
+figure {
+  margin: 1em 40px;
+}
+
+/**
+ * Address differences between Firefox and other browsers.
+ */
+
+hr {
+  box-sizing: content-box;
+  height: 0;
+}
+
+/**
+ * Contain overflow in all browsers.
+ */
+
+pre {
+  overflow: auto;
+}
+
+/**
+ * Address odd `em`-unit font size rendering in all browsers.
+ */
+
+code,
+kbd,
+pre,
+samp {
+  font-family: monospace, monospace;
+  font-size: 1em;
+}
+
+/* Forms
+   ========================================================================== */
+
+/**
+ * Known limitation: by default, Chrome and Safari on OS X allow very limited
+ * styling of `select`, unless a `border` property is set.
+ */
+
+/**
+ * 1. Correct color not being inherited.
+ *    Known issue: affects color of disabled elements.
+ * 2. Correct font properties not being inherited.
+ * 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
+ */
+
+button,
+input,
+optgroup,
+select,
+textarea {
+  color: inherit; /* 1 */
+  font: inherit; /* 2 */
+  margin: 0; /* 3 */
+}
+
+/**
+ * Address `overflow` set to `hidden` in IE 8/9/10/11.
+ */
+
+button {
+  overflow: visible;
+}
+
+/**
+ * Address inconsistent `text-transform` inheritance for `button` and `select`.
+ * All other form control elements do not inherit `text-transform` values.
+ * Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
+ * Correct `select` style inheritance in Firefox.
+ */
+
+button,
+select {
+  text-transform: none;
+}
+
+/**
+ * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
+ *    and `video` controls.
+ * 2. Correct inability to style clickable `input` types in iOS.
+ * 3. Improve usability and consistency of cursor style between image-type
+ *    `input` and others.
+ */
+
+button,
+html input[type="button"], /* 1 */
+input[type="reset"],
+input[type="submit"] {
+  -webkit-appearance: button; /* 2 */
+  cursor: pointer; /* 3 */
+}
+
+/**
+ * Re-set default cursor for disabled elements.
+ */
+
+button[disabled],
+html input[disabled] {
+  cursor: default;
+}
+
+/**
+ * Address Firefox 4+ setting `line-height` on `input` using `!important` in
+ * the UA stylesheet.
+ */
+
+input {
+  line-height: normal;
+}
+
+/**
+ * It's recommended that you don't attempt to style these elements.
+ * Firefox's implementation doesn't respect box-sizing, padding, or width.
+ *
+ * 1. Address box sizing set to `content-box` in IE 8/9/10.
+ * 2. Remove excess padding in IE 8/9/10.
+ */
+
+input[type="checkbox"],
+input[type="radio"] {
+  box-sizing: border-box; /* 1 */
+  padding: 0; /* 2 */
+}
+
+/**
+ * Fix the cursor style for Chrome's increment/decrement buttons. For certain
+ * `font-size` values of the `input`, it causes the cursor style of the
+ * decrement button to change from `default` to `text`.
+ */
+
+input[type="number"]::-webkit-inner-spin-button,
+input[type="number"]::-webkit-outer-spin-button {
+  height: auto;
+}
+
+/**
+ * 1. Address `appearance` set to `searchfield` in Safari and Chrome.
+ * 2. Address `box-sizing` set to `border-box` in Safari and Chrome
+ */
+
+input[type="search"] {
+  -webkit-appearance: textfield; /* 1 */
+  -webkit-box-sizing: content-box; /* 2 */
+  box-sizing: content-box;
+}
+
+/**
+ * Remove inner padding and search cancel button in Safari and Chrome on OS X.
+ * Safari (but not Chrome) clips the cancel button when the search input has
+ * padding (and `textfield` appearance).
+ */
+
+input[type="search"]::-webkit-search-cancel-button,
+input[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+/**
+ * Define consistent border, margin, and padding.
+ */
+
+fieldset {
+  border: 1px solid #c0c0c0;
+  margin: 0 2px;
+  padding: 0.35em 0.625em 0.75em;
+}
+
+/**
+ * 1. Correct `color` not being inherited in IE 8/9/10/11.
+ * 2. Remove padding so people aren't caught out if they zero out fieldsets.
+ */
+
+legend {
+  border: 0; /* 1 */
+  padding: 0; /* 2 */
+}
+
+/**
+ * Remove default vertical scrollbar in IE 8/9/10/11.
+ */
+
+textarea {
+  overflow: auto;
+}
+
+/**
+ * Don't inherit the `font-weight` (applied by a rule above).
+ * NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
+ */
+
+optgroup {
+  font-weight: bold;
+}
+
+/* Tables
+   ========================================================================== */
+
+/**
+ * Remove most spacing between table cells.
+ */
+
+table {
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+td,
+th {
+  padding: 0;
+}

app/src/main/assets/notification_style.json

@@ -0,0 +1,132 @@
+[
+  {
+    "login": {
+      "title": "开启消息通知",
+      "content": "新游上线、互动回复，重要推送不错过",
+      "image": "bg_notification_login_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景1"
+    },
+    "question": {
+      "title": "开启消息通知",
+      "content": "及时查看大神回答",
+      "image": "bg_notification_question_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景2"
+    },
+    "answer": {
+      "title": "开启消息通知",
+      "content": "及时查看点赞与评论",
+      "image": "bg_notification_answer_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景3"
+    },
+    "article": {
+      "title": "开启消息通知",
+      "content": "及时查看点赞与评论",
+      "image": "bg_notification_article_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景4"
+    },
+    "video": {
+      "title": "开启消息通知",
+      "content": "实时获取审核与推荐进度",
+      "image": "bg_notification_video_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景5"
+    },
+    "rating": {
+      "title": "开启消息通知",
+      "content": "成功上墙立即知道",
+      "image": "bg_notification_rating_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景6"
+    },
+    "gift": {
+      "title": "开启消息通知",
+      "content": "新上礼包不再错过",
+      "image": "bg_notification_gift_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景7"
+    },
+    "reserveGame": {
+      "title": "开启消息通知",
+      "content": "新游上线即时体验",
+      "image": "bg_notification_reserve_game_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景8"
+    },
+    "feedback": {
+      "title": "开启消息通知",
+      "content": "及时查看客服回复",
+      "image": "bg_notification_feedback_style_1",
+      "styleNo": "样式A",
+      "scenes": "场景9"
+    }
+  },
+  {
+    "login": {
+      "title": "咦！是新的小伙伴耶！",
+      "content": "打开<font color=\"#1383EB\">通知开关</font>，游戏、礼包、抽奖活动不错过",
+      "image": "bg_notification_login_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景1"
+    },
+    "question": {
+      "title": "发布成功！答案马上来！",
+      "content": "为了第一时间通知您，需要打开<font color=\"#1383EB\">通知开关</font>",
+      "image": "bg_notification_question_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景2"
+    },
+    "answer": {
+      "title": "精彩的回答！大佬牛啤！",
+      "content": "打开<font color=\"#1383EB\">通知开关</font>，可以第一时间收获赞美和感谢哟！",
+      "image": "bg_notification_answer_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景3"
+    },
+    "article": {
+      "title": "发布成功！不愧是你！",
+      "content": "打开<font color=\"#1383EB\">通知开关</font>，可以第一时间收获赞美和互动哟！",
+      "image": "bg_notification_article_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景4"
+    },
+    "video": {
+      "title": "“百万”播放预定！",
+      "content": "<font color=\"#1383EB\">打开通知！</font>第一时间知道审核结果和互动信息哟！",
+      "image": "bg_notification_video_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景5"
+    },
+    "rating": {
+      "title": "这游戏超好玩，我说的！",
+      "content": "想知道有多少人吃下安利？<font color=\"#1383EB\">打开通知</font>，马上知道！",
+      "image": "bg_notification_rating_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景6"
+    },
+    "gift": {
+      "title": "获得道具：神奇的游戏礼包！",
+      "content": "<font color=\"#1383EB\">打开通知！</font>礼包上线，马上知道！",
+      "image": "bg_notification_gift_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景7"
+    },
+    "reserveGame": {
+      "title": "玩最新的游戏，做游戏圈最靓的仔",
+      "content": "<font color=\"#1383EB\">打开通知！</font>游戏上线，更快知道！",
+      "image": "bg_notification_reserve_game_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景8"
+    },
+    "feedback": {
+      "title": "真是重要的反馈！",
+      "content": "感恩有你，光环更精彩！<font color=\"#1383EB\">打开通知</font>，客服回复，马上知道！",
+      "image": "bg_notification_feedback_style_2",
+      "styleNo": "样式B",
+      "scenes": "场景9"
+    }
+  }
+]

app/src/main/assets/privacy_policies.html

@@ -0,0 +1,758 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
+    <title>隐私政策</title>
+    <style>
+      * {
+        margin: 0;
+        padding: 0;
+        -webkit-user-select: text;
+        -moz-user-select: text;
+        -ms-user-select: text;
+        user-select: text;
+      }
+
+      .page {
+        padding: 0 10px;
+      }
+
+      .date p {
+        margin-bottom: 6px;
+      }
+
+      p {
+        font-family: "SourceHanSansSC-regular" !important;
+        color: #101010;
+        font-size: 14px;
+        font-weight: normal;
+        margin-bottom: 6px;
+        word-break: break-all;
+      }
+
+      b {
+        font-weight: 700;
+        font-size: 14px;
+      }
+
+      .points {
+        margin: 14px 0;
+      }
+
+      .points p {
+        margin-bottom: 6px;
+      }
+
+      .introduce p {
+        margin-bottom: 6px;
+      }
+
+      .content p b {
+        margin: 6px 0;
+        display: block;
+      }
+      .link-text {
+        color: rgb(19, 131, 235);
+        cursor: pointer;
+      }
+      .link-text a {
+        color: rgb(19, 131, 235);
+        cursor: pointer;
+        text-decoration: none;
+      }
+      .left-indent {
+        margin-left: 20px;
+      }
+      .page-title {
+        font-weight: bold;
+        font-size: 16px;
+        text-align: center;
+        margin: 20px 0 10px 0;
+      }
+      .red-style {
+        color: red;
+      }
+      .bold-font {
+        font-weight: bold;
+      }
+      span.bold {
+        font-weight: bold;
+      }
+      .link-text {
+        color: #005ad0;
+        text-decoration: underline;
+      }
+    </style>
+  </head>
+
+  <body>
+    <div class="page">
+      <div class="page-title">欢迎您使用光环助手！</div>
+
+      <div class="introduce">
+        <p>
+          为了向您提供游戏预约、论坛互动交流等相关服务，受制于手机系统限制，我们会申请您的设备信息权限；
+        </p>
+        <p>为了让您正常使用游戏下载和论坛功能，我们会申请您的储存权限；</p>
+        <p>以下为完整《隐私权限政策》</p>
+        <p>
+          光环助手（简称“我们”）深知个人信息对您的重要性，我们将依据《中华人民共和国网络安全法》、《信息安全技术
+          个人信息安全规范》（GB/T
+          35273-2017）以及其他相关法律法规和技术规范收集和使用您的个人信息，以帮助我们向您提供更优质的产品和/或服务，
+          保护您的个人信息及隐私安全。我们制定本“隐私指引”并特别提示：希望您在使用光环助手及相关服务前仔细阅读并理解本隐私政策，以便做出适当的选择。
+        </p>
+        <p>
+          下文将帮您详细了解我们如何收集、使用、存储、传输、共享、转让（如适用）与保护个人信息；帮您了解查询、访问、删除、更正、撤回授权个人信息的方式。其中，
+          <b>
+            有关您个人信息权益的条款重要内容我们已用加粗形式提示，请特别关注。
+          </b>
+        </p>
+      </div>
+
+      <div class="points">
+        <p><b>1.我们处理个人信息的法律依据</b></p>
+        <p><b>2.我们如何共享、转让、公开披露个人信息</b></p>
+        <p><b>3.我们如何收集和使用个人信息</b></p>
+        <p><b>4.我们如何存储个人信息</b></p>
+        <p><b>5.我们如何保护个人信息的安全</b></p>
+        <p><b>6.管理您的个人信息</b></p>
+        <p><b>7.未成年人使用条款</b></p>
+        <p><b>8.隐私政策的修订和通知</b></p>
+        <p><b>9.联系我们</b></p>
+      </div>
+
+      <div class="content">
+        <p><b>1.我们处理个人信息的法律依据</b></p>
+        <p>
+          如果您是中华人民共和国大陆地区的用户，我们将依据《中华人民共和国网络安全法》、《信息安全技术
+          个人信息安全规范》（GB/T
+          35273-2017）以及其他相关法律法规收集和使用您的个人信息，为您提供产品或服务。
+        </p>
+        <p>
+          我们通常只会在征得您同意的情况下收集您的个人信息。
+          在某些情况下，我们可能还会基于法律义务或者履行合同之必需向您收集个人信息，或者可能需要个人信息来保护您的重要利益或其他人的利益。
+        </p>
+
+        <p><b>2.我们如何共享、转让、公开披露个人信息</b></p>
+
+        <p class="title margintop"><b>2.1第三方SDK接入说明</b></p>
+        <p>
+          为保障光环助手App相关功能的实现与应用安全稳定的运行，我们会接入由第三方提供的软件开发包（SDK）实现相关功能。
+          <br />
+          我们会对合作方获取有关信息的软件工具开发包（SDK）进行严格的安全检测，并与授权合作伙伴约定严格的数据保护措施，令其按照我们的委托目的、服务说明、本隐私权政策以及其他任何相关的保密和安全措施来处理个人信息。
+          <br />
+          <span class="red-style">
+            下方为整个光环助手
+            <span class="bold">所有版本</span>
+            内接入的所有信息收集类第三方SDK的权限说明，因隐私政策会因光环助手版本迭代而新接入SDK或停止合作部分SDK，方便照顾
+            <span class="bold">所有版本</span>
+            的用户查看自己SDK第三方权限说明。
+            <br />
+            我们对涉及用户信息使用的SDK相关情况进行了逐项列举，具体如下：
+          </span>
+        </p>
+
+        <p class="margintop red-style bold-font"><b>（1）数据统计类</b></p>
+        <p>1.头条推广</p>
+        <p>
+          SDK官网：
+          <span class="link-text">
+            https://ad.oceanengine.com/openapi/index.html
+          </span>
+        </p>
+        <p>SDK包名：com.bytedance</p>
+        <p>企业主体：北京有竹居网络技术有限公司</p>
+        <p>使用目的：用于广告流量统计相关服务</p>
+        <p>
+          收集信息类型：设备品牌、型号、软件系统相关信息、安卓（oaid、无线网SSID名称、WiFi路由器MAC地址、设备MAC地址、IMEI、地理位置）
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            https://ad.oceanengine.com/openapi/register/protocol.html?rid=vo25p8sfqde
+          </span>
+        </p>
+        <p>2.talkingdata统计</p>
+        <p>
+          SDK官网：
+          <span class="link-text">http://www.talkingdata.com/</span>
+        </p>
+        <p>SDK包名：com.tendcloud</p>
+        <p>企业主体：北京腾云天下科技有限公司</p>
+        <p>使用目的：用于统计数据和效果分析，以便为用户提供更好的服务</p>
+        <p>收集信息类型：设备信息、网络信息、位置信息、应用信息</p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            http://www.talkingdata.com/privacy.jsp?languagetype=zh_cn
+          </span>
+        </p>
+
+        <p>3.腾讯MTA</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://mta.qq.com/mta/</span>
+        </p>
+        <p>SDK包名：com.tencent</p>
+        <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+        <p>使用目的：用于统计数据和效果分析</p>
+        <p>
+          收集信息类型：Mac地址、唯一设备识别码（IMEI、android
+          ID、IDFA、OPENUDID、GUID/SIM卡IMSI信息）、地理位置信息
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            https://mta.qq.com/mta/ctr_index/protocol_v2/
+          </span>
+        </p>
+
+        <p>4.腾讯广点通</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://developers.e.qq.com/</span>
+        </p>
+        <p>SDK包名：com.tencent</p>
+        <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+        <p>使用目的：用于广告流量统计相关服务</p>
+        <p>
+          收集信息类型：
+          个人常用设备信息（IMEI、AndroidID）、位置信息，IP地址、软件版本号
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">https://e.qq.com/optout.html</span>
+        </p>
+
+        <p class="margintop red-style bold-font"><b>（2）社交登录类</b></p>
+        <p>5.微信登录分享</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://open.weixin.qq.com/</span>
+        </p>
+        <p>SDK包名：com.tencent.mm.opensdk</p>
+        <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+        <p>使用目的：用于支持微信登录、分享</p>
+        <p>
+          收集信息类型：个人常用设备信息（MAC地址、IMEI、AndroidID）、硬件型号、操作系统类型、软件信息（软件版本号、浏览器类型）、IP地址、服务日志信息、通讯日志信息
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">https://privacy.tencent.com/</span>
+        </p>
+
+        <p>6.QQ登录分享</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://connect.qq.com/</span>
+        </p>
+        <p>SDK包名：com.tentcent</p>
+        <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+        <p>使用目的：用于支持QQ登录、分享</p>
+        <p>
+          收集信息类型：个人常用设备信息（MAC地址、IMEI、AndroidID、IMSI、ICCID、序列号）、设备型号、操作系统版本、软件信息（软件版本号、浏览器类型）、网络信息、IP地址、服务日志信息、通讯日志信息 
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            https://wiki.connect.qq.com/qq互联sdk隐私保护声明
+          </span>
+        </p>
+
+        <p>7.微博登录分享</p>
+        <p>
+          SDK官网：
+          <span class="link-text">http://open.weibo.com/authentication</span>
+        </p>
+        <p>SDK包名：com.sina.weibo.sdk</p>
+        <p>企业主体：北京微梦创科网络技术有限公司</p>
+        <p>使用目的：用于支持微博登录、分享</p>
+        <p>
+          收集信息类型：个人常用设备信息（MAC地址、IMEI、AndroidID、IMSI、ICCID、序列号）、网络信息、应用列表，硬件型号、操作系统类型、软件信息（软件版本号、浏览器类型）、IP地址、服务日志信息、通讯日志信息
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">https://open.weibo.com/wiki/开发者协议</span>
+        </p>
+
+        <p>8.头条抖音登录</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://open.douyin.com/platform</span>
+        </p>
+        <p>SDK包名：com.bytedance.sdk</p>
+        <p>企业主体：北京字节跳动科技有限公司</p>
+        <p>使用目的：用于支持抖音登录</p>
+        <p>
+          收集信息类型：个人常用设备信息（MAC地址、IMEI、AndroidID）、硬件型号、操作系统类型、软件信息（软件版本号、浏览器类型）、IP地址、服务日志信息、通讯日志信息
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            https://www.douyin.com/agreements/?id=6773901168964798477
+          </span>
+        </p>
+
+        <p class="margintop red-style bold-font"><b>（3）推送通知类</b></p>
+        <p>9.友盟推送</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://www.umeng.com/push</span>
+        </p>
+        <p>SDK包名：com.umeng</p>
+        <p>企业主体：北京友盟网络科技有限公司</p>
+        <p>使用目的：用于游戏相关信息的提醒通知</p>
+        <p>
+          收集信息类型：Mac地址、唯一设备识别码（IMEI、android
+          ID、IDFA、OPENUDID、GUID/SIM卡IMSI信息）、地理位置信息
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            https://www.umeng.com/page/policy?spm=a213m0.14063960.0.0.7f626e72hx3nnv
+          </span>
+        </p>
+
+        <p class="margintop red-style bold-font"><b>（4）其他功能类</b></p>
+        <p>10.阿里云反爬虫</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://www.aliyun.com/product/antibot</span>
+        </p>
+        <p>SDK包名：com.alibaba.wireless</p>
+        <p>企业主体：阿里巴巴网络技术有限公司</p>
+        <p>使用目的：为APP提供网络应用安全防护</p>
+        <p>
+          收集信息类型：设备相关信息（例如设备型号、操作系统版本、设备设置、唯一设备标识符等软硬件特征信息）、设备所在位置相关信息（例如IP地址、GPS位置以及能够提供相关信息的Wi-Fi接入点、蓝牙和基站等传感器信息）。
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            http://terms.aliyun.com/legal-agreement/terms/suit_bu1_ali_cloud/suit_bu1_ali_cloud201902141711_54837.html?spm=a2c4g.11186623.J_9220772140.81.b7574832gmk0vr
+          </span>
+        </p>
+
+        <p>11.腾讯bugly</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://bugly.qq.com/v2/</span>
+        </p>
+        <p>SDK包名：com.tencent.bugly</p>
+        <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+        <p>使用目的：APP异常上报</p>
+        <p>
+          收集信息类型：设备及应用信息。如：设备名称、设备识别符、硬件型号、操作系统版本、应用程序版本
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">https://bugly.qq.com/v2/contract</span>
+        </p>
+
+        <p>12.阿里云文件上传</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://www.alibabacloud.com/zh</span>
+        </p>
+        <p>SDK包名：com.alibaba.sdk.android</p>
+        <p>SDK包名：com.alibaba.sdk.android</p>
+        <p>企业主体：阿里巴巴网络技术有限公司</p>
+        <p>使用目的：用于支持用户上传视频等相关内容</p>
+        <p>
+          收集信息类型：设备相关信息（例如设备型号、操作系统版本、设备设置、唯一设备标识符等软硬件特征信息）、设备所在位置相关信息（例如IP地址、GPS位置以及能够提供相关信息的Wi-Fi接入点、蓝牙和基站等传感器信息）。
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            http://terms.aliyun.com/legal-agreement/terms/suit_bu1_ali_cloud/suit_bu1_ali_cloud201902141711_54837.html?spm=a2c4g.11186623.J_9220772140.81.b7574832gmk0vr
+          </span>
+        </p>
+
+        <p>13.阿里云日志上传</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://www.alibabacloud.com/zh</span>
+        </p>
+        <p>SDK包名：com.aliyun.sls.android.sdk</p>
+        <p>企业主体：阿里巴巴网络技术有限公司</p>
+        <p>
+          使用目的：通过网络日志分析这些信息以便更及时响应您的帮助请求，以及用于改进服务
+        </p>
+        <p>
+          收集信息类型：设备相关信息（例如设备型号、操作系统版本、设备设置、唯一设备标识符等软硬件特征信息）、设备所在位置相关信息（例如IP地址、GPS位置以及能够提供相关信息的Wi-Fi接入点、蓝牙和基站等传感器信息）。
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            http://terms.aliyun.com/legal-agreement/terms/suit_bu1_ali_cloud/suit_bu1_ali_cloud201902141711_54837.html?spm=a2c4g.11186623.J_9220772140.81.b7574832gmk0vr
+          </span>
+        </p>
+
+        <p>14.容联七陌</p>
+        <p>
+          SDK官网：
+          <span class="link-text">https://www.7moor.com/developer</span>
+        </p>
+        <p>SDK包名：com.m7.imkfsdk</p>
+        <p>企业主体：北京七陌科技有限公司</p>
+        <p>使用目的：用于提供对应在线客服功能</p>
+        <p>
+          收集信息类型：设备相关信息（设备名称、设备型号、硬件序列号、操作系统和应用程序版本及类型、语言设置、分辨率、移动终端随机存储内存、摄像头/相册、通讯录权限等）
+        </p>
+        <p>
+          隐私政策链接：
+          <span class="link-text">
+            http://m.7moor.com/72/57/p5077783560e807/
+          </span>
+        </p>
+
+        <p><b>2.2 共享您的个人信息</b></p>
+        <p>
+          （1）我们不会与任何公司、组织和个人共享您的个人信息，但以下情况除外：
+        </p>
+        <p>
+          （2）事先获得您的明确授权或同意：
+          获得您的明确同意后，我们会与其他方共享您的个人信息；
+        </p>
+        <p>
+          （3）在法定情形下的共享：
+          根据适用的法律法规、法律程序、政府的强制命令或司法裁定而需共享您的个人信息；
+        </p>
+        <p>
+          （4）在法律要求或允许的范围内，为了保护光环助手及其用户或社会公众的利益、财产或安全免遭损害而有必要提供您的个人信息给第三方；
+        </p>
+        <p>
+          （5）与我们的关联公司共享：
+          您的个人信息可能会在我们的关联公司之间共享。我们会对共享的个人信息进行匿名化处理，且这种共享受本指引所声明目的的约束。关联公司如要改变个人信息的处理目的，将再次征求您的授权同意。
+        </p>
+        <p><b>2.3转让</b></p>
+        <p>
+          （1）我们不会转让您的个人信息给任何其他第三方，除非征得您的明确同意。
+        </p>
+        <p>
+          （2）随着我们业务的持续发展，我们将有可能进行合并、收购、资产转让，您的个人信息有可能因此而被转移。在发生前述变更时，我们将按照法律法规及不低于本隐私政策所载明的安全标准要求继受方保护您的个人信息，否则我们将要求继受方重新征得您的授权同意。
+        </p>
+        <p><b>2.4披露</b></p>
+        <p>
+          （1）我们不会公开披露您的信息，除非遵循国家法律法规规定或者获得您的同意。我们公开披露您的个人信息会采用符合行业内标准的安全保护措施。
+        </p>
+        <p>
+          （2）基于法律、法律程序、诉讼或政府主管部门强制性要求的情况下，我们可能会向有权机关披露您的个人信息。但我们保证，在上述情况发生时，我们会要求披露请求方必须出具与之相应的有效法律文件，并对被披露的信息采取符合法律和业界标准的安全防护措施。
+        </p>
+        <p>
+          （3）对违规账号、欺诈行为进行处罚公告时，我们会披露相关账号的信息。
+        </p>
+
+        <p><b>2.5依法豁免征得同意共享、转让、公开披露的个人信息</b></p>
+        <p>
+          请您理解，在下列情形中，根据法律法规及国家标准，我们共享、转让、公开披露您的个人信息无需征得您的授权同意：
+        </p>
+        <p>（1）与国家安全、国防安全直接相关的；</p>
+        <p>（2）与公共安全、公共卫生、重大公共利益直接相关的；</p>
+        <p>（3）与犯罪侦查、起诉、审判和判决执行等直接相关的；</p>
+        <p>
+          （4）出于维护您或其他个人的生命、财产等重大合法权益但又很难得到本人同意的；
+        </p>
+        <p>（5）您自行向社会公众公开的个人信息；</p>
+        <p>
+          （6）从合法公开披露的信息中收集个人信息的，如合法的新闻报道、政府信息公开等渠道。
+        </p>
+
+        <p><b>3.我们如何收集和使用个人信息</b></p>
+        <p>
+          我们会遵循正当、合法、必要的原则，出于本指引所述的以下目的，收集和使用您在使用服务过程中主动提供或因使用产品或服务而产生的个人信息。
+        </p>
+        <p>
+          我们收集和使用的您的个人信息类型包括两种：第一种：我们产品或服务的核心业务功能所必需的信息：此类信息为产品或服务正常运行的必备信息，您须授权我们收集。如您拒绝提供，您将无法正常使用我们的功能，以"仅浏览（游客身份）"
+          的状态体验；第二种：我们产品或服务的附加业务功能可能需要收集的信息：此信息为非核心业务功能所需的信息，您可以选择是否授权我们收集。如您拒绝提供，将导致附加业务功能无法实现或无法达到我们拟达到的效果，但不影响您对核心业务功能的正常使用。
+        </p>
+        <p>
+          如果我们要将您的个人信息用于本指引未载明的其它用途，或基于特定目的将收集而来的信息用于其他目的，我们将以合理的方式向您告知，并在使用前再次征得您的同意。
+        </p>
+
+        <p><b>3.1实现产品或服务的基本功能</b></p>
+        <p>
+          （1）手机管理和内容资源下载功能。为实现手机管理及手机内容资源下载的基本功能，我们会通过手机系统的公用接口收集经过MD5算法加密的国际移动设备身份码（IMEI）和网络设备地址（MAC），以及手机型号、手机系统版本号、系统编号、系统ID号、屏幕分辨率、上网类型、手机中软件的名称、版本号、版本名、包名、软件使用时间和频率、软件崩溃信息、设备和软件相关的信息。这些信息是提供服务所必须收集的基础信息，如您拒绝提供上述权限将可能导致您无法使用我们的服务。
+        </p>
+        <p>
+          （2）软件升级管理功能。为实现手机软件下载、安装、升级、卸载软件管理功能，在您使用产品时，我们会采集您手机中已安装软件的软件名称、版本号、版本名、软件包名信息并上传到我们的服务器进行软件版本比对。发现有更新的版本，我们会提示您升级相应的软件。上述软件信息为实现此功能所必需，不涉及您个人身份敏感信息。
+        </p>
+        <p>
+          （3）过滤无法使用的软件功能。为了过滤您手机无法使用的软件，我们会收集您手机的手机型号、手机系统版本号、系统版本号、屏幕分辨率信息，并依据这些信息排除您手机无法使用的软件，以保证您在光环助手下载的软件都可安装使用。
+        </p>
+
+        <p><b>3.2关于获取手机设备信息的说明</b></p>
+        <p>
+          （1）为方便区分每个用户的个人信息等，本软件需获取用户的手机设备信息，用于游戏主动预约、论坛互动交流后进行推送等用户相关的行为
+        </p>
+        <p>
+          （2）为了保障软件与服务的安全运行，我们会收集您的硬件型号、操作系统版本号、国际移动设备识别码、唯一设备标识符、网络设备硬件地址、IP
+          地址、WLAN接入点、蓝牙、基站、软件版本号、网络接入方式、类型、状态、网络质量数据、操作、使用、服务日志。
+        </p>
+        <p>
+          （3）为了预防恶意程序及安全运营所必需，我们会收集安装的应用信息或正在运行的进程信息、应用程序的总体运行、使用情况与频率、应用崩溃情况、总体安装使用情况、性能数据、应用来源。
+        </p>
+        <p>
+          （4）我们可能使用您的账户信息、设备信息、服务日志信息以及我们关联公司、合作方在获得您授权或依法可以共享的信息，用于判断账户安全、进行身份验证、检测及防范安全事件。
+        </p>
+        <p>（5）具体会发生获取手机设备信息场景如下说明：</p>
+
+        <p class="left-indent">
+          1） 首次启动光环助手
+          <b></b>
+          2） 游戏列表/游戏详情/资讯文章详情/搜索结果页-预约功能
+          <b></b>
+          3） 礼包中心/礼包详情-领取功能
+          <b></b>
+          4） 评论详情-发送评论功能
+          <b></b>
+          5） 回答/问题详情-我来回答功能
+          <b></b>
+          6） 问答首页-提问功能
+          <b></b>
+          7） 个人主页-发文章功能
+          <b></b>
+          8） 帖子草稿/我的草稿-编辑功能
+          <b></b>
+          9） 游戏投稿功能
+          <b></b>
+          10）视频投稿-上传视频功能
+          <b></b>
+          11）游戏详情-关注游戏功能
+        </p>
+
+        <p><b>3.3帮助您成为我们的在线用户</b></p>
+        <p>（1）注册账号/登录账号</p>
+        <p>
+          a.当您注册、登录我们相关服务时，您可以通过手机号创建账号，并且您可以完善相关的网络身份识别信息（头像、昵称、密码），收集这些信息是为了帮助您完成注册。您还可以根据自身需求选择填写性别、生日、地区及个人介绍来完善您的信息。
+        </p>
+        <p>
+          b.您也可以使用第三方账号登录并使用，您将授权我们获取您在第三方平台注册的公开信息（头像、昵称以及您授权的其他信息），用于与光环助手账号绑定，使您可以直接登录并使用本产品和相关服务。
+        </p>
+        <p>（2）认证用户</p>
+        <p>
+          a.在您使用身份认证的功能或服务时，根据相关法律法规，您可能需要提供您的真实身份信息（真实姓名、身份证号码、电话号码）以完成实名验证。
+        </p>
+        <p>
+          b.这些信息属于个人敏感信息，您可以拒绝提供，但您将可能无法获得相关服务，但不影响其他功能与服务的正常使用。
+        </p>
+
+        <p><b>3.4搜索</b></p>
+        <p>
+          （1）您使用“光环助手”的搜索服务时，我们会收集您的搜索关键字信息、日志记录。
+        </p>
+        <p>
+          （2）为了提供高效的搜索服务，部分前述信息会暂时存储在您的本地存储设备之中，并可向您展示搜索结果内容、搜索历史记录。
+        </p>
+
+        <p><b>3.5预约游戏</b></p>
+        <p>
+          当您使用游戏预约、游戏开测提醒功能时，您可以根据需要是否填写手机号。如您拒绝提供，仅会使您无法接收该预约游戏的短信快速提醒功能，但并不影响您正常使用产品与服务的其他。
+        </p>
+
+        <p><b>3.6游戏时长统计</b></p>
+        <p>
+          您可以授权我们使用应用使用记录访问权限，我们会获取您使用某款游戏应用的使用时长，以便于提供游戏时长展示服务以及对应的大数据统计分析。
+        </p>
+
+        <p><b>3.7信息发布功能</b></p>
+        <p>
+          （1）注册成为光环用户后，可在光环平台上发布提问、帖子、视频，并对别人的提问作出回答或邀请其他用户回答，您还可以对别人的回答、帖子和视频的评论作出回复、赞同、感谢。
+        </p>
+        <p>
+          （2）上述功能基于相册（图片库/视频库）的图片/视频访问及上传的附加服务，我们会请求您授权相机、照片、麦克风权限，您可以使用该功能上传您的照片/图片/视频，以实现发布照片/图片/视频的功能、与其他用户进行照片/图片分享等功能。如您拒绝提供该权限和内容的，仅会使您无法使用该功能，但并不影响您正常使用产品与/或服务的其他功能。
+        </p>
+        <p>
+          （3）您发布内容、评论、提问或回答时，我们将收集您发布的信息，并展示您的昵称、头像、发布内容。
+        </p>
+        <p>
+          （4）用户因使用我们的产品或者服务而被我们收集的信息，例如其他用户发布的信息中可能含有您的部分信息（如：在评论、留言、发布图文、音视频中涉及到与您相关的信息）。
+        </p>
+
+        <p><b>3.8浏览、关注与收藏功能</b></p>
+        <p>（1）您可浏览的内容包括问答、评论、专栏、文章。</p>
+        <p>
+          （2）在浏览的过程中，您还可以关注您感兴趣的用户、专栏、问题、收藏，并收藏上述内容。
+        </p>
+        <p>
+          （3）为此，
+          我们可能会收集您使用时的设备信息，如设备型号、唯一设备标识符、操作系统、分辨率、电信运营商等软硬件信息。
+          我们还可能收集您的浏览器类型，以此来为您提供信息展示的最优方案。
+        </p>
+        <p>
+          （4）此外，在您使用浏览和收藏功能的过程中，我们会自动收集您使用的详细情况，并作为有关的
+          网络日志保存，包括但不限于您输入的搜索关键词信息和点击的链接。
+        </p>
+        <p>
+          （5）您浏览和发布的内容及评论信息，您上传的图片信息、您的交易信息、您使用的语言、访问的日期和时间、及您请求的网页记录、操作系统、软件版本号、登录
+          IP 信息。
+        </p>
+        <p>
+          （6）在此过程中，
+          我们会收集您的浏览记录，浏览记录包括您浏览的问答、主页、文章、专栏，
+          您可以自主删除浏览记录。
+        </p>
+        <p><b>3.9互动交流</b></p>
+        <p>
+          （1）您主动关注您感兴趣的账号、内容、视频并与之进行互动，进行浏览、评论、收藏、点赞或分享内容时，我们会收集您关注的账号，并向您展示您关注账号发布内容。
+        </p>
+        <p>
+          （2）您使用推荐通讯录好友功能时，我们会请求通讯录权限，并将通讯录中的信息进行高强度加密算法处理后，用于向您推荐通信录中的好友。通讯录信息属于个人敏感信息，拒绝提供该信息仅会使您无法使用上述功能，但不影响您正常使用“光环助手”及相关服务的其他功能。
+        </p>
+
+        <p><b>3.10收集、使用个人信息目的变更</b></p>
+        <p>
+          （1）请您了解，随着我们业务的发展，可能会对“光环助手”的功能和提供的服务有所调整变化。
+        </p>
+        <p>
+          （2）原则上，当新功能或服务与我们当前提供的功能或服务相关时，收集与使用的个人信息将与原处理目的具有直接或合理关联。
+        </p>
+        <p>
+          （3）在与原处理目的无直接或合理关联的场景下，我们收集、使用您的个人信息，会再次进行告知，并征得您的同意。
+        </p>
+
+        <p><b>3.11依法豁免征得同意收集和使用的个人信息</b></p>
+        <p>
+          请您理解，在下列情形中，根据法律法规及相关国家标准，我们收集和使用您的个人信息无需征得您的授权同意：
+        </p>
+        <p>（1）与国家安全、国防安全直接相关的；</p>
+        <p>（2）与公共安全、公共卫生、重大公共利益直接相关的；</p>
+        <p>（3）与犯罪侦查、起诉、审判和判决执行等直接相关的；</p>
+        <p>
+          （4）出于维护个人信息主体或其他个人的生命、财产等重大合法权益但又很难得到本人同意的；
+        </p>
+        <p>（5）所收集的您的个人信息是您自行向社会公众公开的；</p>
+        <p>
+          （6）从合法公开披露的信息中收集的您的个人信息的，如合法的新闻报道、政府信息公开等渠道；
+        </p>
+        <p>（7）根据您的要求签订或履行合同所必需的；</p>
+        <p>
+          （8）用于维护软件及相关服务的安全稳定运行所必需的，例如发现、处置软件及相关服务的故障；
+        </p>
+        <p>（9）为合法的新闻报道所必需的；</p>
+        <p>
+          （10）学术研究机构基于公共利益开展统计或学术研究所必要，且对外提供学术研究或描述的结果时，对结果中所包含的个人信息进行去标识化处理的。
+        </p>
+        <p>（11）法律法规规定的其他情形。</p>
+        <p>
+          特别提示您注意，如信息无法单独或结合其他信息识别到您的个人身份，其不属于法律意义上您的个人信息；当您的信息可以单独或结合其他信息识别到您的个人身份时或我们将无法与任何特定个人信息建立联系的数据与其他您的个人信息结合使用时，这些信息在结合使用期间，将作为您的个人信息按照本隐私政策处理与保护。
+        </p>
+
+        <p><b>4.我们如何存储个人信息</b></p>
+        <p><b>4.1 存储地点</b></p>
+        <p>
+          （1）我们依照法律法规的规定，将在境内运营过程中收集和产生的您的个人信息存储于中华人民共和国境内。
+        </p>
+        <p>
+          （2）目前，我们不会将上述信息传输至境外，如果我们向境外传输，我们将会遵循相关国家规定或者征求您的同意。
+        </p>
+        <p><b>4.2存储期限</b></p>
+        <p>
+          （1）我们仅在为提供“光环助手”及服务之目的所必需的期间内保留您的个人信息：您发布的信息、评论、点赞及相关信息，在您未撤回、删除或未注销账号期间，我们会保留相关信息。
+        </p>
+        <p>
+          （2）超出必要期限后，我们将对您的个人信息进行删除或匿名化处理，但法律法规另有规定的除外。
+        </p>
+
+        <p><b>5.我们如何保护个人信息的安全</b></p>
+        <p>
+          （1）我们非常重视您个人信息的安全，将努力采取合理的安全措施（包括技术方面和管理方面）来保护您的个人信息，防止您提供的个人信息被不当使用或未经授权的情况下被访问、公开披露、使用、修改、损坏、丢失或泄漏。
+        </p>
+        <p>
+          （2）我们会使用不低于行业同行的加密技术、匿名化处理及相关合理可行的手段保护您的个人信息，并使用安全保护机制防止您的个人信息遭到恶意攻击。
+        </p>
+        <p>
+          （3）我们会建立专门的安全部门、安全管理制度、数据安全流程保障您的个人信息安全。我们采取严格的数据使用和访问制度，确保只有授权人员才可访问您的个人信息，并适时对数据和技术进行安全审计。
+        </p>
+        <p>
+          （4）尽管已经采取了上述合理有效措施，并已经遵守了相关法律规定要求的标准，但请您理解，由于技术的限制以及可能存在的各种恶意手段，在互联网行业，即便竭尽所能加强安全措施，也不可能始终保证信息百分之百的安全，我们将尽力确保您提供给我们的个人信息的安全性。
+        </p>
+        <p>
+          （5）您知悉并理解，您接入我们的服务所用的系统和通讯网络，有可能因我们可控范围外的因素而出现问题。因此，我们强烈建议您采取积极措施保护个人信息的安全，包括但不限于使用复杂密码、定期修改密码、不将自己的账号密码及相关个人信息透露给他人。
+        </p>
+        <p>
+          （6）我们会制定应急处理预案，并在发生用户信息安全事件时立即启动应急预案，努力阻止这些安全事件的影响和后果扩大。一旦发生用户信息安全事件（泄露、丢失）后，我们将按照法律法规的要求，及时向您告知：安全事件的基本情况和可能的影响、我们已经采取或将要采取的处置措施、您可自主防范和降低风险的建议、对您的补救措施。我们将及时将事件相关情况以推送通知、邮件、信函、短信及相关形式告知您，难以逐一告知时，我们会采取合理、有效的方式发布公告。同时，我们还将按照相关监管部门要求，上报用户信息安全事件的处置情况。
+        </p>
+        <p>
+          （7）您一旦离开“光环助手”及相关服务，浏览或使用其他网站、服务及内容资源，我们将没有能力和直接义务保护您在光环助手及相关服务之外的软件、网站提交的任何个人信息，无论您登录、浏览或使用上述软件、网站是否基于“光环助手”的链接或引导。
+        </p>
+
+        <p><b>6.管理您的个人信息</b></p>
+        <p>
+          我们非常重视您对个人信息的管理，并尽全力保护您的隐私，对于您个人信息的查询、访问、修改、删除、撤回同意授权、注销账号、投诉举报以及设置隐私功能的相关权利，以使您有能力保障您的隐私和信息安全。
+        </p>
+
+        <p><b>6.1 访问、删除、更正您的个人信息</b></p>
+        <p>（1）访问个人账号信息</p>
+        <p>a. 您可以查询、访问您的头像、用户名、简介、性别、生日、地区</p>
+        <p>b.您可以在光环助手的“个人中心”中进行查询、访问。</p>
+        <p>（2）查询访问、更正、取消您关注账号、查询访问粉丝、访客信息</p>
+        <p>a.进入“关注”在关注列表中查询、访问、取消关注您关注的账号。</p>
+        <p>
+          （3）查询访问、更改、删除您的收藏、点赞、浏览记录、阅读历史记录、搜索历史历史记录
+        </p>
+        <p>
+          a.点击“我的”—点击“我的收藏”、
+          “我的点赞”、或“浏览历史”进入查询访问、删除；
+        </p>
+        <p>b.点击搜索栏—删除搜索“历史记录”</p>
+        <p>c.您可以通过点击“系统设置”—点击“清理缓存”。</p>
+        <p>（4）投诉举报</p>
+        <p>a.您可按照我们公示的制度进行投诉或举报。</p>
+        <p>
+          b.如果您认为您的个人信息权利可能受到侵害，或者发现侵害个人信息权利的线索（例如：认为我们收集您的个人信息违反法律规定或者双方约定），“我的”—“基础功能”—“用户反馈”，进入用户反馈界面与我们联系。
+        </p>
+        <p>c.我们核查后会及时反馈您的投诉与举报。</p>
+        <p>（5）访问隐私政策</p>
+        <p>
+          a.您可以在注册页面，或者在登录个人账号“设置”—“关于”查看本隐私政策的全部内容
+        </p>
+        <p>
+          b.请您了解，本隐私政策中所述的“光环助手”及相关服务可能会根据您所使用的手机型号、系统版本、软件应用程序版本、移动客户端等因素而有所不同。最终的产品和服务以您所使用的“光环助手”软件及相关服务为准。
+        </p>
+        <p>（6）停止运营向您告知</p>
+        <p>
+          a.如我们停止运营，我们将及时停止收集您个人信息的活动，将停止运营的通知以逐一送达或公告的形式通知您，并对所持有的您的个人信息进行删除或匿名化处理。
+        </p>
+
+        <p><b>6.2 注销您的个人账号</b></p>
+        <p>
+          如需要注销个人账户，可前往光环助手，我的光环> 设置 > 账号与安全 ＞
+          账号安全中心 ＞
+          注销账号，进行注销操作。请您注意，如果您选择注销光环助手账户，那么您的光环助手账号将不可被使用且相关账号信息将被删除，包括所发布的所有内容，包括：提问、回答、社区文章、评论、关注的人等均会被清空；您将无法再通过光环助手账号登录光环助手的服务（但不会影响您使用无需账号登录即可使用的服务和功能）
+        </p>
+        <p>
+          当您注销账户后，除法律法规要求我们保存相关信息的情况外，我们将停止为您提供相应的产品（或服务），并在60个工作日内删除或匿名化您的个人信息。
+        </p>
+
+        <p><b>7.未成年人条款</b></p>
+        <p>
+          a.若您是未满18周岁的未成年人，在使用“光环助手”及相关服务前，应在您的父母或其他监护人监护、指导下共同阅读并同意本隐私政策。
+        </p>
+        <p>
+          b.我们根据国家相关法律法规的规定保护未成年人的个人信息，只会在法律允许、父母或其他监护人明确同意或保护未成年人所必要的情况下收集、使用、储存、共享、转让或披露未成年人的个人信息；如果我们发现在未事先获得可证实的父母同意的情况下收集了未成年人的个人信息，则会设法尽快删除相关信息。
+        </p>
+        <p>
+          c.若您是未成年人的监护人，当您对您所监护的未成年人的个人信息有相关疑问时，请通过公司本隐私政策公示的联系方式与我们联系。
+        </p>
+        <p><b>8.隐私政策的修订和通知</b></p>
+        <p>
+          （1）为了给您提供更好的服务，光环助手及相关服务将不时更新与变化，我们会适时对本隐私政策进行修订，这些修订构成本隐私政策的一部分并具有等同于本隐私政策的效力，未经您明确同意，我们不会削减您依据当前生效的本隐私政策所应享受的权利。
+        </p>
+        <p>
+          （2）本隐私政策更新后，我们会在光环助手发出更新版本，并在更新后的条款生效前通过公告或其他适当的方式提醒您更新的内容，以便您及时了解本隐私政策的最新版本。
+        </p>
+        <p><b>9.联系我们</b></p>
+        <p>
+          如果您对我们的隐私政策及对您个人信息的处理有任何疑问、意见、建议、或投诉，请通过以下方式与我们联系
+        </p>
+        <p>广州加兔网络科技有限公司</p>
+        <p>注册地址：广州市番禺区市桥街丹山村青云一街2号229房</p>
+        <p>在线客服QQ：350473523</p>
+        <p>信息保护事务联系电话：020-85526920</p>
+        <p>在一般情况下，我们会在15个工作日内对您的请求予以答复</p>
+      </div>
+    </div>
+  </body>
+</html>

app/src/main/assets/rich_editor.js

@@ -0,0 +1,641 @@
+/**
+ * Copyright (C) 2017 Wasabeef
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// alert("")
+
+var RE = {};
+
+RE.currentSelection = {
+    "startContainer": 0,
+    "startOffset": 0,
+    "endContainer": 0,
+    "endOffset": 0};
+
+var isDebug = false;
+try {
+    isDebug = window.NativeCallBack.isNativeBuildDebug()
+} catch(error) {
+}
+
+// 引用远端的JS 和 CSS
+var script = document.createElement("script")
+document.body.appendChild(script)
+if (isDebug) {
+    script.src = "https://resource.ghzs.com/js/halo_app_test.js" + "?timestamp=" + Math.round(new Date().getTime() / 1000)
+} else {
+    script.src = "https://resource.ghzs.com/js/halo.js" + "?timestamp=" + Math.round(new Date().getTime() / 1000 / 1000)
+}
+
+var style = document.createElement("link")
+style.rel = "stylesheet"
+style.type = "text/css"
+if (isDebug) {
+    style.href = "https://resource.ghzs.com/css/halo_app_test.css" + "?timestamp=" + Math.round(new Date().getTime() / 1000)
+} else {
+    style.href = "https://resource.ghzs.com/css/halo.css" + "?timestamp=" + Math.round(new Date().getTime() / 1000 / 1000)
+}
+
+document.head.appendChild(style)
+
+RE.editor = document.getElementById('editor');
+
+document.addEventListener("selectionchange", function() { RE.backuprange(); });
+
+// Initializations
+RE.callback = function() {
+    window.location.href = "re-callback://" + encodeURIComponent(RE.getHtml());
+}
+
+RE.setHtml = function(contents) {
+    RE.editor.innerHTML = decodeURIComponent(contents.replace(/\+/g, '%20'));
+}
+
+// 后续初始化html代码,都用该方法
+RE.setHtmlByVideoStatus = function(contents) {
+    RE.editor.innerHTML = decodeURIComponent(contents.replace(/\+/g, '%20'));
+}
+
+// Deprecated
+RE.getHtml = function() {
+    return RE.editor.innerHTML;
+}
+
+RE.getText = function() {
+    return RE.editor.innerText;
+}
+
+RE.setBaseTextColor = function(color) {
+    RE.editor.style.color  = color;
+}
+
+RE.setBaseFontSize = function(size) {
+    RE.editor.style.fontSize = size;
+}
+
+RE.setPadding = function(left, top, right, bottom) {
+  RE.editor.style.paddingLeft = left;
+  RE.editor.style.paddingTop = top;
+  RE.editor.style.paddingRight = right;
+  RE.editor.style.paddingBottom = bottom;
+}
+
+RE.setBackgroundColor = function(color) {
+    document.body.style.backgroundColor = color;
+}
+
+RE.setBackgroundImage = function(image) {
+    RE.editor.style.backgroundImage = image;
+}
+
+RE.setWidth = function(size) {
+    RE.editor.style.minWidth = size;
+}
+
+RE.setHeight = function(size) {
+    RE.editor.style.height = size;
+}
+
+RE.setTextAlign = function(align) {
+    RE.editor.style.textAlign = align;
+}
+
+RE.setVerticalAlign = function(align) {
+    RE.editor.style.verticalAlign = align;
+}
+
+RE.setPlaceholder = function(placeholder) {
+    RE.editor.setAttribute("placeholder", placeholder);
+}
+
+RE.setEditorFocus = function() {
+    RE.editor.focus();
+}
+
+RE.setInputEnabled = function(inputEnabled) {
+    RE.editor.contentEditable = String(inputEnabled);
+}
+
+RE.formatBlock = function() {
+    document.execCommand('formatBlock', false, 'p');
+}
+
+RE.undo = function() {
+    document.execCommand('undo', false, null);
+}
+
+RE.redo = function() {
+    document.execCommand('redo', false, null);
+}
+
+RE.setBold = function() {
+    document.execCommand('bold', false, null);
+}
+
+RE.setItalic = function() {
+    document.execCommand('italic', false, null);
+}
+
+RE.setSubscript = function() {
+    document.execCommand('subscript', false, null);
+}
+
+RE.setSuperscript = function() {
+    document.execCommand('superscript', false, null);
+}
+
+RE.setStrikeThrough = function() {
+    document.execCommand('strikeThrough', false, null);
+}
+
+RE.setUnderline = function() {
+    document.execCommand('underline', false, null);
+}
+
+RE.setBullets = function() {
+    document.execCommand('insertUnorderedList', false, null);
+}
+
+RE.setNumbers = function() {
+    document.execCommand('insertOrderedList', false, null);
+}
+
+RE.setTextColor = function(color) {
+    RE.restorerange();
+    document.execCommand("styleWithCSS", null, true);
+    document.execCommand('foreColor', false, color);
+    document.execCommand("styleWithCSS", null, false);
+}
+
+RE.setTextBackgroundColor = function(color) {
+    RE.restorerange();
+    document.execCommand("styleWithCSS", null, true);
+    document.execCommand('hiliteColor', false, color);
+    document.execCommand("styleWithCSS", null, false);
+}
+
+RE.setFontSize = function(fontSize){
+    document.execCommand("fontSize", false, fontSize);
+}
+
+RE.setHeading = function(heading) {
+    document.execCommand('formatBlock', false, '<h'+heading+'>');
+    RE.sendElementNameToNative()
+}
+
+RE.setIndent = function() {
+    document.execCommand('indent', false, null);
+}
+
+RE.setOutdent = function() {
+    document.execCommand('outdent', false, null);
+}
+
+RE.setJustifyLeft = function() {
+    document.execCommand('justifyLeft', false, null);
+}
+
+RE.setJustifyCenter = function() {
+    document.execCommand('justifyCenter', false, null);
+}
+
+RE.setJustifyRight = function() {
+    document.execCommand('justifyRight', false, null);
+}
+
+RE.setBlockquote = function() {
+    document.execCommand('formatBlock', false, '<blockquote>');
+//    var blockId = window.getSelection().focusNode.parentNode;
+//    $(blockId).addClass("haloBlock")
+    RE.sendElementNameToNative()
+}
+
+RE.insertImage = function(url) {
+    var html = "<div><img src =\"" + url + "\" style=\" max-width: 100%; display:block; margin:15px auto; height: auto;\"></div><br>"
+    RE.insertHTML(html);
+}
+
+// 替换成缩略图
+RE.replaceTbImage = function(imgRuleFlag, gifRuleFlag) {
+    var imgs = document.getElementsByTagName("img");
+    var index = 0
+    for (var i = 0; i < imgs.length; i++) {
+         var img = imgs[i];
+         var imageClassName = img.className;
+//         console.log(imageClassName)
+         if (imageClassName == "image-link" || img.className == "poster") continue;
+         if(img.src.indexOf("?") > 0) continue;
+//         console.log(i)
+         var tbImg
+         if(img.src.indexOf(".gif") > 0) {
+           tbImg = img.src + gifRuleFlag
+         } else {
+           tbImg = img.src + imgRuleFlag
+         }
+
+         img.style.cssText = "max-width: 60%; display:block; margin:15px auto; height: auto;"
+         img.src = tbImg;
+
+         if (index == 0) {
+             var bigImg = document.createElement('img');
+             bigImg.src = "file:///android_asset/web_load_dfimg_icon.png";
+             bigImg.style.cssText = "max-width: 20%; margin:15px 0 0 0; height: auto;"
+             img.parentNode.insertBefore(bigImg, img.parentNode.childNodes[0]);
+             i++;
+
+             if(img.parentNode != null) {
+                 img.parentNode.style.cssText += "text-align: left;"
+             }
+
+             if(img.parentNode != null && img.parentNode.parentNode != null) {
+                 img.parentNode.parentNode.style.cssText += "text-align: left;"
+             }
+
+         }
+         index ++;
+    }
+}
+
+// 替换成默认图
+RE.replaceAllDfImage = function(imgRuleFlag, gifRuleFlag) {
+    var imgs = document.getElementsByTagName("img");
+    for (var i = 0; i < imgs.length; i++) {
+         var img = imgs[i];
+         var imageClassName = img.className;
+         if (imageClassName == "image-link" || img.className == "poster") continue;
+         if(img.src.indexOf("web_load_dfimg_icon") > 0) {
+            img.parentNode.removeChild(img.parentNode.childNodes[0]);
+            i--;
+         } else {
+           if(img.src.indexOf(".gif") > 0) {
+              if(gifRuleFlag.indexOf(",default") > 0) {
+                 img.style.cssText = "max-width: 100%; display:block; margin:8px auto; height: auto;"
+                 img.src = img.src.split("?")[0] + gifRuleFlag
+              }
+           } else {
+             img.style.cssText = "max-width: 100%; display:block; margin:8px auto; height: auto;"
+             img.src = img.src.split("?")[0] + imgRuleFlag
+           }
+         }
+    }
+
+}
+
+// 去除显示大图
+RE.hideShowBigPic = function() {
+    var imgs = document.getElementsByTagName("img");
+    var j = 0;
+    for (var i = 0; i < imgs.length; i++) {
+         var img = imgs[i];
+         var imageClassName = img.className;
+         if (imageClassName == "image-link" || img.className == "poster") continue;
+         if(img.src.indexOf(",thumbnail") > 0 && img.src.indexOf(".gif") == -1) {
+            j++;
+         }
+    }
+    // 去除显示大图
+    if (j == 0) {
+       var imgs = document.getElementsByTagName("img");
+       for (var i = 0; i < imgs.length; i++) {
+           var img = imgs[i];
+           var imageClassName = img.className;
+           if (imageClassName == "image-link" || img.className == "poster") continue;
+           if(img.src.indexOf("web_load_dfimg_icon") > 0) {
+             img.parentNode.removeChild(img.parentNode.childNodes[0]);
+             break;
+           }
+       }
+    }
+}
+
+RE.replaceDfImageByUrl = function(imgUrl, imgRuleFlag, gifRuleFlag) {
+    var imgs = document.getElementsByTagName("img");
+    for (var i = 0; i < imgs.length; i++) {
+         var img = imgs[i];
+         var imageClassName = img.className;
+         if (imageClassName == "image-link" || img.className == "poster") continue;
+         if (img.src.indexOf(imgUrl) != -1) {
+             img.style.cssText = "max-width: 100%; display:block; margin:8px auto; height: auto;"
+             if(img.src.indexOf(".gif") > 0) {
+               img.src = img.src.split("?")[0] + gifRuleFlag
+             } else {
+               img.src = img.src.split("?")[0] + imgRuleFlag
+             }
+         }
+    }
+    RE.hideShowBigPic();
+}
+
+RE.ImageClickListener = function() {
+    var imgs = document.getElementsByTagName("img");
+    for (var i = 0; i < imgs.length; i++) {
+         var img = imgs[i];
+         var imageClassName = img.className;
+         if (imageClassName == "image-link"|| img.className == "poster") continue;
+         window.imagelistener.imageArr(img.src);
+         img.onclick = function() {
+             window.imagelistener.imageClick(this.src);
+         }
+    }
+}
+
+RE.insertHTML = function(html) {
+    RE.restorerange();
+    document.execCommand('insertHTML', false, html);
+}
+
+RE.insertLink = function(url, title) {
+    RE.restorerange();
+    var sel = document.getSelection();
+    if (sel.toString().length == 0) {
+        document.execCommand("insertHTML",false,"<a href='"+url+"'>"+title+"</a>");
+    } else if (sel.rangeCount) {
+       var el = document.createElement("a");
+       el.setAttribute("href", url);
+       el.setAttribute("title", title);
+
+       var range = sel.getRangeAt(0).cloneRange();
+       range.surroundContents(el);
+       sel.removeAllRanges();
+       sel.addRange(range);
+   }
+    RE.callback();
+}
+
+RE.setTodo = function(text) {
+    var html = '<input type="checkbox" name="'+ text +'" value="'+ text +'"/> &nbsp;';
+    document.execCommand('insertHTML', false, html);
+}
+
+RE.prepareInsert = function() {
+    RE.backuprange();
+}
+
+RE.backuprange = function(){
+    var selection = window.getSelection();
+    if (selection.rangeCount > 0) {
+      var range = selection.getRangeAt(0);
+      RE.currentSelection = {
+          "startContainer": range.startContainer,
+          "startOffset": range.startOffset,
+          "endContainer": range.endContainer,
+          "endOffset": range.endOffset};
+    }
+}
+
+RE.restorerange = function(){
+    try {
+        var selection = window.getSelection();
+        selection.removeAllRanges();
+        var range = document.createRange();
+        range.setStart(RE.currentSelection.startContainer, RE.currentSelection.startOffset);
+        range.setEnd(RE.currentSelection.endContainer, RE.currentSelection.endOffset);
+        selection.addRange(range);
+    } catch(error) {
+
+    }
+}
+
+RE.enabledEditingItems = function(e) {
+    var items = [];
+    if (document.queryCommandState('bold')) {
+        items.push('bold');
+    }
+    if (document.queryCommandState('italic')) {
+        items.push('italic');
+    }
+    if (document.queryCommandState('subscript')) {
+        items.push('subscript');
+    }
+    if (document.queryCommandState('superscript')) {
+        items.push('superscript');
+    }
+    if (document.queryCommandState('strikeThrough')) {
+        items.push('strikeThrough');
+    }
+    if (document.queryCommandState('underline')) {
+        items.push('underline');
+    }
+    if (document.queryCommandState('insertOrderedList')) {
+        items.push('orderedList');
+    }
+    if (document.queryCommandState('insertUnorderedList')) {
+        items.push('unorderedList');
+    }
+    if (document.queryCommandState('justifyCenter')) {
+        items.push('justifyCenter');
+    }
+    if (document.queryCommandState('justifyFull')) {
+        items.push('justifyFull');
+    }
+    if (document.queryCommandState('justifyLeft')) {
+        items.push('justifyLeft');
+    }
+    if (document.queryCommandState('justifyRight')) {
+        items.push('justifyRight');
+    }
+    if (document.queryCommandState('insertHorizontalRule')) {
+        items.push('horizontalRule');
+    }
+    var formatBlock = document.queryCommandValue('formatBlock');
+    if (formatBlock.length > 0) {
+        items.push(formatBlock);
+    }
+
+    window.location.href = "re-state://" + encodeURI(items.join(','));
+}
+
+RE.focus = function() {
+    var range = document.createRange();
+    range.selectNodeContents(RE.editor);
+    range.collapse(false);
+    var selection = window.getSelection();
+    selection.removeAllRanges();
+    selection.addRange(range);
+    RE.editor.focus();
+}
+
+RE.blurFocus = function() {
+    RE.editor.blur();
+}
+
+RE.removeFormat = function() {
+    document.execCommand('removeFormat', false, null);
+}
+
+RE.insertCustomStyleLink = function(data) {
+  var entity = JSON.parse(data)
+  var html =  "<br/><div class='"+ entity.type +"-container'>\n" +
+              "     <a class='"+ entity.type +"' href=\"javascript:void(0);\" contenteditable=\"false\" onclick=\"customLinkgo(this)\" data-datas='"+ data +"'>\n" +
+              "        <div class='flex-container'>\n" +
+              "        <div class='gh-internal-content img-left'>\n" +
+              "            <img class = \"image-link\" src='"+ entity.icon +"' />\n" +
+              "        </div>\n" +
+              "        <div class='gh-internal-content content-right'>\n" +
+              "            <p class='content-title'>"+ entity.title +"</p>\n" +
+              "            <p class='contents'>"+ entity.brief +"</p>\n" +
+              "        </div>\n" +
+              "        </div>\n" +
+              "        </a>\n" +
+              "    </div><br/>"
+  var tags = "", gameHtml = ""
+  if (entity.tags != null) {
+    for (var i = 0; i < entity.tags.length; i++) {
+        tags += "<label>"+ entity.tags[i]+"</label>"
+    }
+
+    gameHtml = "<br/><div class='"+ entity.type +"-container'>\n" +
+               "        <a class='"+ entity.type +"' href=\"javascript:void(0);\" contenteditable=\"false\" onclick=\"customLinkgo(this)\" data-datas='"+ data +"'>\n" +
+               "        <div class='flex-container'>\n" +
+               "            <div class='gh-internal-content img-left'>\n" +
+               "                <img class='image-link' src='"+ entity.icon +"' />\n" +
+               "            </div>\n" +
+               "            <div class='gh-internal-content content-right'>\n" +
+               "                <p class='content-title'>"+ entity.title +"</p>\n" +
+               "                <p class='tags'>"+ tags +"</p>\n" +
+               "            </div>\n" +
+               "        </div>\n" +
+               "        </a></div><br/>"
+  }
+
+  switch(entity.type) {
+    case "answer":
+      document.execCommand("insertHTML",false, html);
+      break
+    case "community_article":
+      document.execCommand("insertHTML",false, html);
+      break
+    case "game":
+      document.execCommand("insertHTML",false, gameHtml);
+      break
+  }
+  RE.callback();
+}
+
+RE.showLinkStyle = function() {
+  var answerElement = document.getElementsByClassName("answer-container");
+  for (var i=0;i<answerElement.length;i+=1){
+    answerElement[i].style.display = 'inline';
+  }
+  var articleElement = document.getElementsByClassName("community_article-container");
+  for (var i=0;i<articleElement.length;i+=1){
+    articleElement[i].style.display = 'inline';
+  }
+  var gameElement = document.getElementsByClassName("game-container");
+  for (var i=0;i<gameElement.length;i+=1){
+    gameElement[i].style.display = 'inline';
+  }
+}
+
+RE.hideLinkStyle = function() {
+  var answerElement = document.getElementsByClassName("answer-container");
+  for (var i=0;i<answerElement.length;i+=1){
+    answerElement[i].style.display = 'none';
+  }
+  var articleElement = document.getElementsByClassName("community_article-container");
+  for (var i=0;i<articleElement.length;i+=1){
+    articleElement[i].style.display = 'none';
+  }
+  var gameElement = document.getElementsByClassName("game-container");
+  for (var i=0;i<gameElement.length;i+=1){
+    gameElement[i].style.display = 'none';
+  }
+}
+
+// Event Listeners
+RE.editor.addEventListener("input", RE.callback);
+
+RE.editor.addEventListener("keyup", function(e) {
+    var KEY_LEFT = 37, KEY_RIGHT = 39;
+    if (e.which == KEY_LEFT || e.which == KEY_RIGHT) {
+        RE.enabledEditingItems(e);
+    }
+    RE.sendElementNameToNative()
+});
+
+RE.editor.addEventListener("click", function(e) {
+    RE.enabledEditingItems
+    RE.sendElementNameToNative()
+    var s = document.getSelection()
+    var isNeedRemoveR = RE.recursion(e.target)
+    if (isNeedRemoveR && s.rangeCount) {
+       s.removeAllRanges()
+    }
+});
+
+document.addEventListener("selectionchange", function(e) {
+   RE.sendElementNameToNative()
+});
+
+RE.recursion = function(dom) {
+    var parenDom = dom.parentElement
+    if (parenDom && parenDom instanceof Element &&
+    typeClassList.indexOf(parenDom.className) > -1) {
+      return parenDom
+    } else if(parenDom && parenDom instanceof Element &&
+    typeClassList.indexOf(parenDom.className) === -1 && parenDom.nodeName !== 'BODY') {
+      return RE.recursion(parenDom)
+    } else {
+      return null
+    }
+}
+
+// 返回组件标签 多个标签以"空格"划分
+RE.sendElementNameToNative = function() {
+    if (window.getSelection) {
+        var selection = window.getSelection()
+        if (selection.rangeCount > 0) {
+            var range = selection.getRangeAt(0);
+            var container = range.startContainer;
+            var elements = " " + container.localName + " ";
+            var parentElement;
+            while(true) {
+                if(parentElement != null) {
+                    parentElement = parentElement.parentElement
+                } else {
+                    parentElement = container.parentElement
+                }
+                if (parentElement == null || parentElement.localName == null) {
+                    break;
+                }
+                elements = elements + " " + parentElement.localName + " "
+            }
+//            console.log(elements)
+            window.OnCursorChangeListener.onElements(elements);
+        }
+    }
+}
+
+// android function to open link
+function customLinkgo(self) {
+  var datas = self.dataset.datas
+  // console.log(datas)
+  window.OnLinkClickListener.onClick(datas)
+}
+
+// 在web页面播放视频
+//RE.initArticleVideo = function(){
+//    initArticleVideo()
+//}
+
+function showNativeDialog(title, message, positive, negative, callback) {
+    var jsCallbackCode = "(" + function (v) {
+        window.onNativeDialogCallback(v);
+        delete window.onNativeDialogCallback;
+    }.toString() + ")";
+
+    window.onNativeDialogCallback = callback;
+    window.NativeCallBack.showDialog(title, message, positive, negative, jsCallbackCode);
+}

app/src/main/assets/style.css

@@ -0,0 +1,43 @@
+/**
+ * Copyright (C) 2017 Wasabeef
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@charset "UTF-8";
+
+
+html {
+  height: 100%;
+}
+
+body {
+  overflow: scroll;
+  display: table;
+  table-layout: fixed;
+  width: 100%;
+  min-height:100%;
+}
+
+#editor {
+  display: table-cell;
+  outline: 0px solid transparent;
+  background-repeat: no-repeat;
+  background-position: center;
+  background-size: cover;
+}
+
+#editor[placeholder]:empty:not(:focus):before {
+  content: attr(placeholder);
+  opacity: .5;
+}}

app/src/main/assets/user_regulation.html

@@ -0,0 +1,493 @@
+<!DOCTYPE html>
+<html>
+  <head lang="en">
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
+    <title>光环助手软件许可及服务协议</title>
+  </head>
+  <style>
+    * {
+      margin: 0;
+      padding: 0;
+      font-size: 14px;
+      -webkit-user-select: text;
+      -moz-user-select: text;
+      -ms-user-select: text;
+      user-select: text;
+    }
+
+    body {
+      margin: 10px;
+    }
+
+    .top {
+      margin-left: 0;
+      margin-right: 0;
+      padding: 10px 0 10px 0;
+    }
+
+    .title {
+      font-weight: 700;
+    }
+
+    p {
+      font-size: 14px;
+      word-break: break-all;
+    }
+
+    .bold {
+      font-weight: 700;
+    }
+    .margintop {
+      margin-top: 10px;
+    }
+    .left-indent {
+      margin-left: 20px;
+    }
+    .red-style {
+      color: red;
+    }
+    .bold-font {
+      font-weight: bold;
+    }
+    span.bold {
+      font-weight: bold;
+    }
+    .link-text {
+      color: #005ad0;
+      text-decoration: underline;
+    }
+  </style>
+
+  <body>
+    <h3 class="top">光环助手软件许可及服务协议</h3>
+    <h5 class="title">首部及导言</h5>
+    <p>欢迎使用光环助手软件许可及服务</p>
+    <p>
+      各位用户在使用光环助手前，请您务必审慎阅读、并充分理解本协议中的各项条款，
+      <span class="bold">
+        特别是免除或者限制责任的条款，以及开通或使用某项服务的单独协议，并选择接受或不接受。
+      </span>
+      除非您已阅读并接受本协议所有条款，否则您无权下载、安装或使用本软件及相关服务。您的下载、安装、使用、登录等行为即视为您已阅读并同意上述协议的约束。
+    </p>
+    <p>如果您未满18周岁，请在法定监护人的陪同下阅读本协议及其他上述协议。</p>
+    <h5 class="title margintop">一、权利声明</h5>
+    <p>
+      “光环助手”的一切知识产权，以及与“光环助手”相关的所有信息内容，包括但不限于：文字表述及其组合、图标、图饰、图像、图表、色彩、界面设计、版面框架、有关数据、附加程序、印刷材料或电子文档等均为光环助手所有，受著作权法和国际著作权条约以及其他知识产权法律法规的保护。
+    </p>
+    <h5 class="title margintop">二、软件使用规范</h5>
+    <p>
+      2.1
+      本软件是基于Android（安卓）系统手机、平板电脑(PAD)等设备开发的一款软件，提供注册登录、手机游戏管理、游戏推荐、文章阅读等功能
+    </p>
+    <p>2.2 软件的下载、安装和使用</p>
+    <p>
+      本软件为免费软件，用户可以非商业性、无限制数量地从光环授权的渠道下载、安装及使用本软件。
+    </p>
+    <p>
+      <span class="bold">
+        如果您从未经光环授权的第三方获取本软件或与本软件名称相同的安装程序，光环无法保证该软件能够正常使用，并对因此给您造成的损失不予负责。
+      </span>
+    </p>
+    <p>2.3 软件的复制、分发和传播</p>
+    <p>
+      本产品以学习、研究交流为目的。用户可以非商业性、无限制数量地复制、分发和传播本软件产品。但必须保证每一份复制、分发和传播都是完整和真实的,
+      包括所有有关本软件产品的软件、电子文档, 版权和商标，亦包括本协议。
+    </p>
+    <p>2.4 软件的更新</p>
+    <p>
+      为了改善用户体验、完善服务内容，光环将不断努力开发新的服务，并为您不时提供软件更新（这些更新可能会采取软件替换、修改、功能强化、版本升级等形式）。为了保证本软件及服务的安全性和功能的一致性，光环有权不经向您特别通知而对软件进行更新，或者对软件的部分功能效果进行改变或限制。本软件新版本发布后，旧版本的软件可能无法使用。光环不保证旧版本软件继续可用及相应的客户服务，请您随时核对并下载最新版本。
+    </p>
+    <h5 class="title margintop">三、用户使用须知</h5>
+    <p>3.1 您理解并同意：</p>
+    <p>
+      为了向您提供有效的服务，本软件会利用您移动通讯终端的处理器和带宽等资源。本软件使用过程中可能产生数据流量的费用，用户需自行向运营商了解相关资费信息，并自行承担相关费用.
+    </p>
+    <p>3.2 您理解并同意：</p>
+    <p>
+      由本软件进行收录、推荐并提供下载、升级服务的第三方软件，由第三方享有一切合法权利，光环并不能识别用户利用本软件下载、安装的第三方软件是否有合法来源。
+      <span class="bold">
+        因第三方软件引发的任何纠纷，由该第三方负责解决，光环不承担任何责任。
+      </span>
+      同时光环不对第三方软件或技术提供客服支持，若用户需要获取支持，请与该软件或技术提供商联系，若您为有关软件的权利人，不愿本软件为您的软件提供用户下载、安装、使用的服务，也可按本协议约定的联系方式联系我们，我们将会积极配合进行处理。
+    </p>
+    <p>3.3 您理解并同意:</p>
+    <p>
+      <span class="bold">
+        如果因您不正当使用本软件造成了不良影响，或因使用本软件造成的包括但不限于数据异常等问题，均由使用者自行承担，光环团队不对任意类型的使用结果承担责任；
+      </span>
+    </p>
+    <p>3.4 您理解并同意:</p>
+    <p>
+      本软件不含任何破坏用户移动通讯设备数据和获取用户隐私信息的恶意代码，不会泄露用户的个人信息和隐私；
+    </p>
+    <p>3.5 您理解并同意:</p>
+    <p>
+      <span class="bold">
+        对于包括但不限于互联网网络故障、计算机故障、手机故障或病毒、信息损坏或丢失、计算机系统问题，或其它任何基于不可抗力原因而产生的损失，光环团队不承担任何责任。
+      </span>
+    </p>
+    <p>3.6 您理解并同意:</p>
+    <p>光环发布、收录的文章均不代表光环立场。</p>
+    <p>3.7 您理解并同意:</p>
+    <p>
+      为实现软件包括但不限于集中展示、下载、安装、卸载等游戏管理功能以及文章优先推荐功能，本软件会检测用户手机中已安装游戏的包名、版本号、版本名、游戏名称信息。除征得用户明确同意和法律明确规定外，光环不会向第三方泄露任何的用户信息
+    </p>
+    <p>3.8 您理解并同意:</p>
+    <p>
+      用户应在遵守法律及本协议的前提下使用本软件。用户无权实施包括但不限于下列行为:
+    </p>
+    3.8.1 不得删除或者改变本软件上的所有权利管理电子信息
+    <br />
+    3.8.2 不得故意避开或者破坏著作权人为保护本软件著作权而采取的技术措施;
+    <br />
+    3.8.3 用户不得利用本软件误导、欺骗他人;
+    <br />
+    3.8.4
+    违反国家规定，对计算机信息系统功能进行删除、修改、增加、干扰，造成计算机信息系统不能正常运行;
+    <br />
+    3.8.5 未经允许，进入计算机信息网络或者使用计算机信息网络资源;
+    <br />
+    3.8.6 未经允许，对计算机信息网络功能进行删除、修改或者增加;
+    <br />
+    3.8.7
+    未经允许，对计算机信息网络中存储、处理或者传输的数据和应用程序进行删除、修改或者增加;
+    <br />
+    3.8.8 破坏本软件系统或网站的正常运行，故意传播计算机病毒等破坏性程序;
+    <br />
+    3.8.9 其他任何危害计算机信息网络安全的行为。
+    <br />
+    <p>3.9 您理解并同意:</p>
+    <p>
+      本软件经过详细的测试，但不能保证与所有的软硬件系统完全兼容，不能保证本软件完全没有错误。如果出现不兼容及软件错误的情况，用户可通过各反馈途径将情况告知光环团队，获得技术支持。如果无法解决兼容性问题，用户可以删除本软件。
+    </p>
+    <h5 class="title margintop">四、争议解决处理</h5>
+    <p>
+      本《协议》的解释、效力及纠纷的解决，适用于中华人民共和国法律。若用户和光环助手之间发生任何纠纷或争议，首先应友好协商解决，协商不成的，用户在此完全同意将纠纷或争议提交光环助手所在地法院管辖
+    </p>
+
+    <p class="title margintop"><b>五、第三方SDK接入说明</b></p>
+    <p>
+      为保障光环助手App相关功能的实现与应用安全稳定的运行，我们会接入由第三方提供的软件开发包（SDK）实现相关功能。
+      <br />
+      我们会对合作方获取有关信息的软件工具开发包（SDK）进行严格的安全检测，并与授权合作伙伴约定严格的数据保护措施，令其按照我们的委托目的、服务说明、本隐私权政策以及其他任何相关的保密和安全措施来处理个人信息。
+      <br />
+      <span class="red-style">
+        下方为整个光环助手
+        <span class="bold">所有版本</span>
+        内接入的所有信息收集类第三方SDK的权限说明，因隐私政策会因光环助手版本迭代而新接入SDK或停止合作部分SDK，方便照顾
+        <span class="bold">所有版本</span>
+        的用户查看自己SDK第三方权限说明。
+        <br />
+        我们对涉及用户信息使用的SDK相关情况进行了逐项列举，具体如下：
+      </span>
+    </p>
+
+    <p class="margintop red-style bold-font"><b>（1）数据统计类</b></p>
+    <p>1.头条推广</p>
+    <p>
+      SDK官网：
+      <span class="link-text">
+        https://ad.oceanengine.com/openapi/index.html
+      </span>
+    </p>
+    <p>SDK包名：com.bytedance</p>
+    <p>企业主体：北京有竹居网络技术有限公司</p>
+    <p>使用目的：用于广告流量统计相关服务</p>
+    <p>
+      收集信息类型：设备品牌、型号、软件系统相关信息、安卓（oaid、无线网SSID名称、WiFi路由器MAC地址、设备MAC地址、IMEI、地理位置）
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        https://ad.oceanengine.com/openapi/register/protocol.html?rid=vo25p8sfqde
+      </span>
+    </p>
+    <p>2.talkingdata统计</p>
+    <p>
+      SDK官网：
+      <span class="link-text">http://www.talkingdata.com/</span>
+    </p>
+    <p>SDK包名：com.tendcloud</p>
+    <p>企业主体：北京腾云天下科技有限公司</p>
+    <p>使用目的：用于统计数据和效果分析，以便为用户提供更好的服务</p>
+    <p>收集信息类型：设备信息、网络信息、位置信息、应用信息</p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        http://www.talkingdata.com/privacy.jsp?languagetype=zh_cn
+      </span>
+    </p>
+
+    <p>3.腾讯MTA</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://mta.qq.com/mta/</span>
+    </p>
+    <p>SDK包名：com.tencent</p>
+    <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+    <p>使用目的：用于统计数据和效果分析</p>
+    <p>
+      收集信息类型：Mac地址、唯一设备识别码（IMEI、android
+      ID、IDFA、OPENUDID、GUID/SIM卡IMSI信息）、地理位置信息
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        https://mta.qq.com/mta/ctr_index/protocol_v2/
+      </span>
+    </p>
+
+    <p>4.腾讯广点通</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://developers.e.qq.com/</span>
+    </p>
+    <p>SDK包名：com.tencent</p>
+    <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+    <p>使用目的：用于广告流量统计相关服务</p>
+    <p>
+      收集信息类型：
+      个人常用设备信息（IMEI、AndroidID）、位置信息，IP地址、软件版本号
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">https://e.qq.com/optout.html</span>
+    </p>
+
+    <p class="margintop red-style bold-font"><b>（2）社交登录类</b></p>
+    <p>5.微信登录分享</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://open.weixin.qq.com/</span>
+    </p>
+    <p>SDK包名：com.tencent.mm.opensdk</p>
+    <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+    <p>使用目的：用于支持微信登录、分享</p>
+    <p>
+      收集信息类型：个人常用设备信息（MAC地址、IMEI、AndroidID）、硬件型号、操作系统类型、软件信息（软件版本号、浏览器类型）、IP地址、服务日志信息、通讯日志信息
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">https://privacy.tencent.com/</span>
+    </p>
+
+    <p>6.QQ登录分享</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://connect.qq.com/</span>
+    </p>
+    <p>SDK包名：com.tentcent</p>
+    <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+    <p>使用目的：用于支持QQ登录、分享</p>
+    <p>
+      收集信息类型：个人常用设备信息（MAC地址、IMEI、AndroidID、IMSI、ICCID、序列号）、设备型号、操作系统版本、软件信息（软件版本号、浏览器类型）、网络信息、IP地址、服务日志信息、通讯日志信息 
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        https://wiki.connect.qq.com/qq互联sdk隐私保护声明
+      </span>
+    </p>
+
+    <p>7.微博登录分享</p>
+    <p>
+      SDK官网：
+      <span class="link-text">http://open.weibo.com/authentication</span>
+    </p>
+    <p>SDK包名：com.sina.weibo.sdk</p>
+    <p>企业主体：北京微梦创科网络技术有限公司</p>
+    <p>使用目的：用于支持微博登录、分享</p>
+    <p>
+      收集信息类型：个人常用设备信息（MAC地址、IMEI、AndroidID、IMSI、ICCID、序列号）、网络信息、应用列表，硬件型号、操作系统类型、软件信息（软件版本号、浏览器类型）、IP地址、服务日志信息、通讯日志信息
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">https://open.weibo.com/wiki/开发者协议</span>
+    </p>
+
+    <p>8.头条抖音登录</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://open.douyin.com/platform</span>
+    </p>
+    <p>SDK包名：com.bytedance.sdk</p>
+    <p>企业主体：北京字节跳动科技有限公司</p>
+    <p>使用目的：用于支持抖音登录</p>
+    <p>
+      收集信息类型：个人常用设备信息（MAC地址、IMEI、AndroidID）、硬件型号、操作系统类型、软件信息（软件版本号、浏览器类型）、IP地址、服务日志信息、通讯日志信息
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        https://www.douyin.com/agreements/?id=6773901168964798477
+      </span>
+    </p>
+
+    <p class="margintop red-style bold-font"><b>（3）推送通知类</b></p>
+    <p>9.友盟推送</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://www.umeng.com/push</span>
+    </p>
+    <p>SDK包名：com.umeng</p>
+    <p>企业主体：北京友盟网络科技有限公司</p>
+    <p>使用目的：用于游戏相关信息的提醒通知</p>
+    <p>
+      收集信息类型：Mac地址、唯一设备识别码（IMEI、android
+      ID、IDFA、OPENUDID、GUID/SIM卡IMSI信息）、地理位置信息
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        https://www.umeng.com/page/policy?spm=a213m0.14063960.0.0.7f626e72hx3nnv
+      </span>
+    </p>
+
+    <p class="margintop red-style bold-font"><b>（4）其他功能类</b></p>
+    <p>10.阿里云反爬虫</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://www.aliyun.com/product/antibot</span>
+    </p>
+    <p>SDK包名：com.alibaba.wireless</p>
+    <p>企业主体：阿里巴巴网络技术有限公司</p>
+    <p>使用目的：为APP提供网络应用安全防护</p>
+    <p>
+      收集信息类型：设备相关信息（例如设备型号、操作系统版本、设备设置、唯一设备标识符等软硬件特征信息）、设备所在位置相关信息（例如IP地址、GPS位置以及能够提供相关信息的Wi-Fi接入点、蓝牙和基站等传感器信息）。
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        http://terms.aliyun.com/legal-agreement/terms/suit_bu1_ali_cloud/suit_bu1_ali_cloud201902141711_54837.html?spm=a2c4g.11186623.J_9220772140.81.b7574832gmk0vr
+      </span>
+    </p>
+
+    <p>11.腾讯bugly</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://bugly.qq.com/v2/</span>
+    </p>
+    <p>SDK包名：com.tencent.bugly</p>
+    <p>企业主体：深圳市腾讯计算机系统有限公司</p>
+    <p>使用目的：APP异常上报</p>
+    <p>
+      收集信息类型：设备及应用信息。如：设备名称、设备识别符、硬件型号、操作系统版本、应用程序版本
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">https://bugly.qq.com/v2/contract</span>
+    </p>
+
+    <p>12.阿里云文件上传</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://www.alibabacloud.com/zh</span>
+    </p>
+    <p>SDK包名：com.alibaba.sdk.android</p>
+    <p>SDK包名：com.alibaba.sdk.android</p>
+    <p>企业主体：阿里巴巴网络技术有限公司</p>
+    <p>使用目的：用于支持用户上传视频等相关内容</p>
+    <p>
+      收集信息类型：设备相关信息（例如设备型号、操作系统版本、设备设置、唯一设备标识符等软硬件特征信息）、设备所在位置相关信息（例如IP地址、GPS位置以及能够提供相关信息的Wi-Fi接入点、蓝牙和基站等传感器信息）。
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        http://terms.aliyun.com/legal-agreement/terms/suit_bu1_ali_cloud/suit_bu1_ali_cloud201902141711_54837.html?spm=a2c4g.11186623.J_9220772140.81.b7574832gmk0vr
+      </span>
+    </p>
+
+    <p>13.阿里云日志上传</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://www.alibabacloud.com/zh</span>
+    </p>
+    <p>SDK包名：com.aliyun.sls.android.sdk</p>
+    <p>企业主体：阿里巴巴网络技术有限公司</p>
+    <p>
+      使用目的：通过网络日志分析这些信息以便更及时响应您的帮助请求，以及用于改进服务
+    </p>
+    <p>
+      收集信息类型：设备相关信息（例如设备型号、操作系统版本、设备设置、唯一设备标识符等软硬件特征信息）、设备所在位置相关信息（例如IP地址、GPS位置以及能够提供相关信息的Wi-Fi接入点、蓝牙和基站等传感器信息）。
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">
+        http://terms.aliyun.com/legal-agreement/terms/suit_bu1_ali_cloud/suit_bu1_ali_cloud201902141711_54837.html?spm=a2c4g.11186623.J_9220772140.81.b7574832gmk0vr
+      </span>
+    </p>
+
+    <p>14.容联七陌</p>
+    <p>
+      SDK官网：
+      <span class="link-text">https://www.7moor.com/developer</span>
+    </p>
+    <p>SDK包名：com.m7.imkfsdk</p>
+    <p>企业主体：北京七陌科技有限公司</p>
+    <p>使用目的：用于提供对应在线客服功能</p>
+    <p>
+      收集信息类型：设备相关信息（设备名称、设备型号、硬件序列号、操作系统和应用程序版本及类型、语言设置、分辨率、移动终端随机存储内存、摄像头/相册、通讯录权限等）
+    </p>
+    <p>
+      隐私政策链接：
+      <span class="link-text">http://m.7moor.com/72/57/p5077783560e807/</span>
+    </p>
+
+    <h5 class="title margintop">六、关于获取手机设备信息的说明</h5>
+    <div>
+      （1）为方便区分每个用户的个人信息等，本软件需获取用户的手机设备信息，用于游戏主动预约、论坛互动交流后进行推送等用户相关的行为
+      <br />
+      （2）为了保障软件与服务的安全运行，我们会收集您的硬件型号、操作系统版本号、国际移动设备识别码、唯一设备标识符、网络设备硬件地址、IP
+      地址、WLAN接入点、蓝牙、基站、软件版本号、网络接入方式、类型、状态、网络质量数据、操作、使用、服务日志。
+      <br />
+      （3）为了预防恶意程序及安全运营所必需，我们会收集安装的应用信息或正在运行的进程信息、应用程序的总体运行、使用情况与频率、应用崩溃情况、总体安装使用情况、性能数据、应用来源。
+      <br />
+      （4）我们可能使用您的账户信息、设备信息、服务日志信息以及我们关联公司、合作方在获得您授权或依法可以共享的信息，用于判断账户安全、进行身份验证、检测及防范安全事件。
+      <br />
+      （5）具体会发生获取手机设备信息场景如下说明：
+      <br />
+      <p class="left-indent">
+        1) 首次启动光环助手
+        <br />
+        2) 游戏列表/游戏详情/资讯文章详情/搜索结果页-预约功能
+        <br />
+        3) 礼包中心/礼包详情-领取功能
+        <br />
+        4) 评论详情-发送评论功能
+        <br />
+        5) 回答/问题详情-我来回答功能
+        <br />
+        6) 问答首页-提问功能
+        <br />
+        7) 个人主页-发文章功能
+        <br />
+        8) 帖子草稿/我的草稿-编辑功能
+        <br />
+        9) 游戏投稿功能
+        <br />
+        10) 视频投稿-上传视频功能
+        <br />
+        11) 游戏详情-关注游戏功能
+      </p>
+    </div>
+
+    <h5 class="title margintop">七、其他</h5>
+    <p>
+      7.1
+      本协议所有条款的标题仅为阅读方便，本身并无实际涵义，不能作为本协议涵义解释的依据。
+      <br />
+      7.2
+      如果本协议中的任何条款无论因何种原因完全或部分无效或不具有执行力，或违反任何适用的法律，则该条款被视为删除，但本协议的其余条款仍应有效并且有约束力。
+      <br />
+      7.3
+      光环有权随时根据有关法律、法规的变化以及公司经营状况和经营策略的调整等修改本协议。修改后的协议会在软件设置内发布。
+      当发生有关争议时，以最新的协议文本为准。如果不同意改动的内容，用户可以自行删除本软件。如果用户继续使用本软件，则视为您接受本协议的变动。
+      <br />
+      <span class="bold">
+        7.4 光环在法律允许的最大范围内对本协议拥有解释权与修改权。
+      </span>
+    </p>
+  </body>
+</html>

app/src/main/java/android/support/v7/widget/AdapterHelper.java

@@ -1,699 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.support.v7.widget;
-
-import android.support.v4.util.Pools;
-import android.util.Log;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-
-import static android.support.v7.widget.RecyclerView.ViewHolder;
-
-/**
- * Helper class that can enqueue and process adapter update operations.
- * <p>
- * To support animations, RecyclerView presents an older version the Adapter to best represent
- * previous state of the layout. Sometimes, this is not trivial when items are removed that were
- * not laid out, in which case, RecyclerView has no way of providing that item's view for
- * animations.
- * <p>
- * AdapterHelper creates an UpdateOp for each adapter data change then pre-processes them. During
- * pre processing, AdapterHelper finds out which UpdateOps can be deferred to second layout pass
- * and which cannot. For the UpdateOps that cannot be deferred, AdapterHelper will change them
- * according to previously deferred operation and dispatch them before the first layout pass. It
- * also takes care of updating deferred UpdateOps since order of operations is changed by this
- * process.
- * <p>
- * Although operations may be forwarded to LayoutManager in different orders, resulting data set
- * is guaranteed to be the consistent.
- */
-class AdapterHelper implements OpReorderer.Callback {
-
-    final static int POSITION_TYPE_INVISIBLE = 0;
-
-    final static int POSITION_TYPE_NEW_OR_LAID_OUT = 1;
-
-    private static final boolean DEBUG = false;
-
-    private static final String TAG = "AHT";
-
-    private Pools.Pool<UpdateOp> mUpdateOpPool = new Pools.SimplePool<UpdateOp>(UpdateOp.POOL_SIZE);
-
-    final ArrayList<UpdateOp> mPendingUpdates = new ArrayList<UpdateOp>();
-
-    final ArrayList<UpdateOp> mPostponedList = new ArrayList<UpdateOp>();
-
-    final Callback mCallback;
-
-    Runnable mOnItemProcessedCallback;
-
-    final boolean mDisableRecycler;
-
-    final OpReorderer mOpReorderer;
-
-    AdapterHelper(Callback callback) {
-        this(callback, false);
-    }
-
-    AdapterHelper(Callback callback, boolean disableRecycler) {
-        mCallback = callback;
-        mDisableRecycler = disableRecycler;
-        mOpReorderer = new OpReorderer(this);
-    }
-
-    AdapterHelper addUpdateOp(UpdateOp... ops) {
-        Collections.addAll(mPendingUpdates, ops);
-        return this;
-    }
-
-    void reset() {
-        recycleUpdateOpsAndClearList(mPendingUpdates);
-        recycleUpdateOpsAndClearList(mPostponedList);
-    }
-
-    void preProcess() {
-        mOpReorderer.reorderOps(mPendingUpdates);
-        final int count = mPendingUpdates.size();
-        for (int i = 0; i < count; i++) {
-            UpdateOp op = mPendingUpdates.get(i);
-            switch (op.cmd) {
-                case UpdateOp.ADD:
-                    applyAdd(op);
-                    break;
-                case UpdateOp.REMOVE:
-                    applyRemove(op);
-                    break;
-                case UpdateOp.UPDATE:
-                    applyUpdate(op);
-                    break;
-                case UpdateOp.MOVE:
-                    applyMove(op);
-                    break;
-            }
-            if (mOnItemProcessedCallback != null) {
-                mOnItemProcessedCallback.run();
-            }
-        }
-        mPendingUpdates.clear();
-    }
-
-    void consumePostponedUpdates() {
-        final int count = mPostponedList.size();
-        for (int i = 0; i < count; i++) {
-            mCallback.onDispatchSecondPass(mPostponedList.get(i));
-        }
-        recycleUpdateOpsAndClearList(mPostponedList);
-    }
-
-    private void applyMove(UpdateOp op) {
-        // MOVE ops are pre-processed so at this point, we know that item is still in the adapter.
-        // otherwise, it would be converted into a REMOVE operation
-        postponeAndUpdateViewHolders(op);
-    }
-
-    private void applyRemove(UpdateOp op) {
-        int tmpStart = op.positionStart;
-        int tmpCount = 0;
-        int tmpEnd = op.positionStart + op.itemCount;
-        int type = -1;
-        for (int position = op.positionStart; position < tmpEnd; position++) {
-            boolean typeChanged = false;
-            ViewHolder vh = mCallback.findViewHolder(position);
-            if (vh != null || canFindInPreLayout(position)) {
-                // If a ViewHolder exists or this is a newly added item, we can defer this update
-                // to post layout stage.
-                // * For existing ViewHolders, we'll fake its existence in the pre-layout phase.
-                // * For items that are added and removed in the same process cycle, they won't
-                // have any effect in pre-layout since their add ops are already deferred to
-                // post-layout pass.
-                if (type == POSITION_TYPE_INVISIBLE) {
-                    // Looks like we have other updates that we cannot merge with this one.
-                    // Create an UpdateOp and dispatch it to LayoutManager.
-                    UpdateOp newOp = obtainUpdateOp(UpdateOp.REMOVE, tmpStart, tmpCount);
-                    dispatchAndUpdateViewHolders(newOp);
-                    typeChanged = true;
-                }
-                type = POSITION_TYPE_NEW_OR_LAID_OUT;
-            } else {
-                // This update cannot be recovered because we don't have a ViewHolder representing
-                // this position. Instead, post it to LayoutManager immediately
-                if (type == POSITION_TYPE_NEW_OR_LAID_OUT) {
-                    // Looks like we have other updates that we cannot merge with this one.
-                    // Create UpdateOp op and dispatch it to LayoutManager.
-                    UpdateOp newOp = obtainUpdateOp(UpdateOp.REMOVE, tmpStart, tmpCount);
-                    postponeAndUpdateViewHolders(newOp);
-                    typeChanged = true;
-                }
-                type = POSITION_TYPE_INVISIBLE;
-            }
-            if (typeChanged) {
-                position -= tmpCount; // also equal to tmpStart
-                tmpEnd -= tmpCount;
-                tmpCount = 1;
-            } else {
-                tmpCount++;
-            }
-        }
-        if (tmpCount != op.itemCount) { // all 1 effect
-            recycleUpdateOp(op);
-            op = obtainUpdateOp(UpdateOp.REMOVE, tmpStart, tmpCount);
-        }
-        if (type == POSITION_TYPE_INVISIBLE) {
-            dispatchAndUpdateViewHolders(op);
-        } else {
-            postponeAndUpdateViewHolders(op);
-        }
-    }
-
-    private void applyUpdate(UpdateOp op) {
-        int tmpStart = op.positionStart;
-        int tmpCount = 0;
-        int tmpEnd = op.positionStart + op.itemCount;
-        int type = -1;
-        for (int position = op.positionStart; position < tmpEnd; position++) {
-            ViewHolder vh = mCallback.findViewHolder(position);
-            if (vh != null || canFindInPreLayout(position)) { // deferred
-                if (type == POSITION_TYPE_INVISIBLE) {
-                    UpdateOp newOp = obtainUpdateOp(UpdateOp.UPDATE, tmpStart, tmpCount);
-                    dispatchAndUpdateViewHolders(newOp);
-                    tmpCount = 0;
-                    tmpStart = position;
-                }
-                type = POSITION_TYPE_NEW_OR_LAID_OUT;
-            } else { // applied
-                if (type == POSITION_TYPE_NEW_OR_LAID_OUT) {
-                    UpdateOp newOp = obtainUpdateOp(UpdateOp.UPDATE, tmpStart, tmpCount);
-                    postponeAndUpdateViewHolders(newOp);
-                    tmpCount = 0;
-                    tmpStart = position;
-                }
-                type = POSITION_TYPE_INVISIBLE;
-            }
-            tmpCount++;
-        }
-        if (tmpCount != op.itemCount) { // all 1 effect
-            recycleUpdateOp(op);
-            op = obtainUpdateOp(UpdateOp.UPDATE, tmpStart, tmpCount);
-        }
-        if (type == POSITION_TYPE_INVISIBLE) {
-            dispatchAndUpdateViewHolders(op);
-        } else {
-            postponeAndUpdateViewHolders(op);
-        }
-    }
-
-    private void dispatchAndUpdateViewHolders(UpdateOp op) {
-        // tricky part.
-        // traverse all postpones and revert their changes on this op if necessary, apply updated
-        // dispatch to them since now they are after this op.
-        if (op.cmd == UpdateOp.ADD || op.cmd == UpdateOp.MOVE) {
-            throw new IllegalArgumentException("should not dispatch add or move for pre layout");
-        }
-        if (DEBUG) {
-            Log.d(TAG, "dispatch (pre)" + op);
-            Log.d(TAG, "postponed state before:");
-            for (UpdateOp updateOp : mPostponedList) {
-                Log.d(TAG, updateOp.toString());
-            }
-            Log.d(TAG, "----");
-        }
-
-        // handle each pos 1 by 1 to ensure continuity. If it breaks, dispatch partial
-        // TODO Since move ops are pushed to end, we should not need this anymore
-        int tmpStart = updatePositionWithPostponed(op.positionStart, op.cmd);
-        if (DEBUG) {
-            Log.d(TAG, "pos:" + op.positionStart + ",updatedPos:" + tmpStart);
-        }
-        int tmpCnt = 1;
-        int offsetPositionForPartial = op.positionStart;
-        final int positionMultiplier;
-        switch (op.cmd) {
-            case UpdateOp.UPDATE:
-                positionMultiplier = 1;
-                break;
-            case UpdateOp.REMOVE:
-                positionMultiplier = 0;
-                break;
-            default:
-                throw new IllegalArgumentException("op should be remove or update." + op);
-        }
-        for (int p = 1; p < op.itemCount; p++) {
-            final int pos = op.positionStart + (positionMultiplier * p);
-            int updatedPos = updatePositionWithPostponed(pos, op.cmd);
-            if (DEBUG) {
-                Log.d(TAG, "pos:" + pos + ",updatedPos:" + updatedPos);
-            }
-            boolean continuous = false;
-            switch (op.cmd) {
-                case UpdateOp.UPDATE:
-                    continuous = updatedPos == tmpStart + 1;
-                    break;
-                case UpdateOp.REMOVE:
-                    continuous = updatedPos == tmpStart;
-                    break;
-            }
-            if (continuous) {
-                tmpCnt++;
-            } else {
-                // need to dispatch this separately
-                UpdateOp tmp = obtainUpdateOp(op.cmd, tmpStart, tmpCnt);
-                if (DEBUG) {
-                    Log.d(TAG, "need to dispatch separately " + tmp);
-                }
-                dispatchFirstPassAndUpdateViewHolders(tmp, offsetPositionForPartial);
-                recycleUpdateOp(tmp);
-                if (op.cmd == UpdateOp.UPDATE) {
-                    offsetPositionForPartial += tmpCnt;
-                }
-                tmpStart = updatedPos;// need to remove previously dispatched
-                tmpCnt = 1;
-            }
-        }
-        recycleUpdateOp(op);
-        if (tmpCnt > 0) {
-            UpdateOp tmp = obtainUpdateOp(op.cmd, tmpStart, tmpCnt);
-            if (DEBUG) {
-                Log.d(TAG, "dispatching:" + tmp);
-            }
-            dispatchFirstPassAndUpdateViewHolders(tmp, offsetPositionForPartial);
-            recycleUpdateOp(tmp);
-        }
-        if (DEBUG) {
-            Log.d(TAG, "post dispatch");
-            Log.d(TAG, "postponed state after:");
-            for (UpdateOp updateOp : mPostponedList) {
-                Log.d(TAG, updateOp.toString());
-            }
-            Log.d(TAG, "----");
-        }
-    }
-
-    void dispatchFirstPassAndUpdateViewHolders(UpdateOp op, int offsetStart) {
-        mCallback.onDispatchFirstPass(op);
-        switch (op.cmd) {
-            case UpdateOp.REMOVE:
-                mCallback.offsetPositionsForRemovingInvisible(offsetStart, op.itemCount);
-                break;
-            case UpdateOp.UPDATE:
-                mCallback.markViewHoldersUpdated(offsetStart, op.itemCount);
-                break;
-            default:
-                throw new IllegalArgumentException("only remove and update ops can be dispatched"
-                        + " in first pass");
-        }
-    }
-
-    private int updatePositionWithPostponed(int pos, int cmd) {
-        final int count = mPostponedList.size();
-        for (int i = count - 1; i >= 0; i--) {
-            UpdateOp postponed = mPostponedList.get(i);
-            if (postponed.cmd == UpdateOp.MOVE) {
-                int start, end;
-                if (postponed.positionStart < postponed.itemCount) {
-                    start = postponed.positionStart;
-                    end = postponed.itemCount;
-                } else {
-                    start = postponed.itemCount;
-                    end = postponed.positionStart;
-                }
-                if (pos >= start && pos <= end) {
-                    //i'm affected
-                    if (start == postponed.positionStart) {
-                        if (cmd == UpdateOp.ADD) {
-                            postponed.itemCount++;
-                        } else if (cmd == UpdateOp.REMOVE) {
-                            postponed.itemCount--;
-                        }
-                        // op moved to left, move it right to revert
-                        pos++;
-                    } else {
-                        if (cmd == UpdateOp.ADD) {
-                            postponed.positionStart++;
-                        } else if (cmd == UpdateOp.REMOVE) {
-                            postponed.positionStart--;
-                        }
-                        // op was moved right, move left to revert
-                        pos--;
-                    }
-                } else if (pos < postponed.positionStart) {
-                    // postponed MV is outside the dispatched OP. if it is before, offset
-                    if (cmd == UpdateOp.ADD) {
-                        postponed.positionStart++;
-                        postponed.itemCount++;
-                    } else if (cmd == UpdateOp.REMOVE) {
-                        postponed.positionStart--;
-                        postponed.itemCount--;
-                    }
-                }
-            } else {
-                if (postponed.positionStart <= pos) {
-                    if (postponed.cmd == UpdateOp.ADD) {
-                        pos -= postponed.itemCount;
-                    } else if (postponed.cmd == UpdateOp.REMOVE) {
-                        pos += postponed.itemCount;
-                    }
-                } else {
-                    if (cmd == UpdateOp.ADD) {
-                        postponed.positionStart++;
-                    } else if (cmd == UpdateOp.REMOVE) {
-                        postponed.positionStart--;
-                    }
-                }
-            }
-            if (DEBUG) {
-                Log.d(TAG, "dispath (step" + i + ")");
-                Log.d(TAG, "postponed state:" + i + ", pos:" + pos);
-                for (UpdateOp updateOp : mPostponedList) {
-                    Log.d(TAG, updateOp.toString());
-                }
-                Log.d(TAG, "----");
-            }
-        }
-        for (int i = mPostponedList.size() - 1; i >= 0; i--) {
-            UpdateOp op = mPostponedList.get(i);
-            if (op.cmd == UpdateOp.MOVE) {
-                if (op.itemCount == op.positionStart || op.itemCount < 0) {
-                    mPostponedList.remove(i);
-                    recycleUpdateOp(op);
-                }
-            } else if (op.itemCount <= 0) {
-                mPostponedList.remove(i);
-                recycleUpdateOp(op);
-            }
-        }
-        return pos;
-    }
-
-    private boolean canFindInPreLayout(int position) {
-        final int count = mPostponedList.size();
-        for (int i = 0; i < count; i++) {
-            UpdateOp op = mPostponedList.get(i);
-            if (op.cmd == UpdateOp.MOVE) {
-                if (findPositionOffset(op.itemCount, i + 1) == position) {
-                    return true;
-                }
-            } else if (op.cmd == UpdateOp.ADD) {
-                // TODO optimize.
-                final int end = op.positionStart + op.itemCount;
-                for (int pos = op.positionStart; pos < end; pos++) {
-                    if (findPositionOffset(pos, i + 1) == position) {
-                        return true;
-                    }
-                }
-            }
-        }
-        return false;
-    }
-
-    private void applyAdd(UpdateOp op) {
-        postponeAndUpdateViewHolders(op);
-    }
-
-    private void postponeAndUpdateViewHolders(UpdateOp op) {
-        if (DEBUG) {
-            Log.d(TAG, "postponing " + op);
-        }
-//        Utils.log("add UpdateOp to PostponedList");
-        mPostponedList.add(op);
-//        Utils.log("op" + op.positionStart + "=" + op.itemCount);
-        switch (op.cmd) {
-            case UpdateOp.ADD:
-                mCallback.offsetPositionsForAdd(op.positionStart, op.itemCount);
-                break;
-            case UpdateOp.MOVE:
-                mCallback.offsetPositionsForMove(op.positionStart, op.itemCount);
-                break;
-            case UpdateOp.REMOVE:
-                mCallback.offsetPositionsForRemovingLaidOutOrNewView(op.positionStart,
-                        op.itemCount);
-                break;
-            case UpdateOp.UPDATE:
-                mCallback.markViewHoldersUpdated(op.positionStart, op.itemCount);
-                break;
-            default:
-                throw new IllegalArgumentException("Unknown update op type for " + op);
-        }
-    }
-
-    boolean hasPendingUpdates() {
-        return mPendingUpdates.size() > 0;
-    }
-
-    int findPositionOffset(int position) {
-        return findPositionOffset(position, 0);
-    }
-
-    int findPositionOffset(int position, int firstPostponedItem) {
-        int count = mPostponedList.size();
-        for (int i = firstPostponedItem; i < count; ++i) {
-            UpdateOp op = mPostponedList.get(i);
-            if (op.cmd == UpdateOp.MOVE) {
-                if (op.positionStart == position) {
-                    position = op.itemCount;
-                } else {
-                    if (op.positionStart < position) {
-                        position--; // like a remove
-                    }
-                    if (op.itemCount <= position) {
-                        position++; // like an add
-                    }
-                }
-            } else if (op.positionStart <= position) {
-                if (op.cmd == UpdateOp.REMOVE) {
-                    if (position < op.positionStart + op.itemCount) {
-                        return -1;
-                    }
-                    position -= op.itemCount;
-                } else if (op.cmd == UpdateOp.ADD) {
-                    position += op.itemCount;
-                }
-            }
-        }
-        return position;
-    }
-
-    /**
-     * @return True if updates should be processed.
-     */
-    boolean onItemRangeChanged(int positionStart, int itemCount) {
-        mPendingUpdates.add(obtainUpdateOp(UpdateOp.UPDATE, positionStart, itemCount));
-        return mPendingUpdates.size() == 1;
-    }
-
-    /**
-     * @return True if updates should be processed.
-     */
-    boolean onItemRangeInserted(int positionStart, int itemCount) {
-        mPendingUpdates.add(obtainUpdateOp(UpdateOp.ADD, positionStart, itemCount));
-        return mPendingUpdates.size() == 1;
-    }
-
-    /**
-     * @return True if updates should be processed.
-     */
-    boolean onItemRangeRemoved(int positionStart, int itemCount) {
-        mPendingUpdates.add(obtainUpdateOp(UpdateOp.REMOVE, positionStart, itemCount));
-        return mPendingUpdates.size() == 1;
-    }
-
-    /**
-     * @return True if updates should be processed.
-     */
-    boolean onItemRangeMoved(int from, int to, int itemCount) {
-        if (from == to) {
-            return false;//no-op
-        }
-        if (itemCount != 1) {
-            throw new IllegalArgumentException("Moving more than 1 item is not supported yet");
-        }
-        mPendingUpdates.add(obtainUpdateOp(UpdateOp.MOVE, from, to));
-        return mPendingUpdates.size() == 1;
-    }
-
-    /**
-     * Skips pre-processing and applies all updates in one pass.
-     */
-    void consumeUpdatesInOnePass() {
-        // we still consume postponed updates (if there is) in case there was a pre-process call
-        // w/o a matching consumePostponedUpdates.
-        consumePostponedUpdates();
-        final int count = mPendingUpdates.size();
-        for (int i = 0; i < count; i++) {
-            UpdateOp op = mPendingUpdates.get(i);
-            switch (op.cmd) {
-                case UpdateOp.ADD:
-                    mCallback.onDispatchSecondPass(op);
-                    mCallback.offsetPositionsForAdd(op.positionStart, op.itemCount);
-                    break;
-                case UpdateOp.REMOVE:
-                    mCallback.onDispatchSecondPass(op);
-                    mCallback.offsetPositionsForRemovingInvisible(op.positionStart, op.itemCount);
-                    break;
-                case UpdateOp.UPDATE:
-                    mCallback.onDispatchSecondPass(op);
-                    mCallback.markViewHoldersUpdated(op.positionStart, op.itemCount);
-                    break;
-                case UpdateOp.MOVE:
-                    mCallback.onDispatchSecondPass(op);
-                    mCallback.offsetPositionsForMove(op.positionStart, op.itemCount);
-                    break;
-            }
-            if (mOnItemProcessedCallback != null) {
-                mOnItemProcessedCallback.run();
-            }
-        }
-        recycleUpdateOpsAndClearList(mPendingUpdates);
-    }
-
-    /**
-     * Queued operation to happen when child views are updated.
-     */
-    static class UpdateOp {
-
-        static final int ADD = 0;
-
-        static final int REMOVE = 1;
-
-        static final int UPDATE = 2;
-
-        static final int MOVE = 3;
-
-        static final int POOL_SIZE = 30;
-
-        int cmd;
-
-        int positionStart;
-
-        // holds the target position if this is a MOVE
-        int itemCount;
-
-        UpdateOp(int cmd, int positionStart, int itemCount) {
-            this.cmd = cmd;
-            this.positionStart = positionStart;
-            this.itemCount = itemCount;
-        }
-
-        String cmdToString() {
-            switch (cmd) {
-                case ADD:
-                    return "add";
-                case REMOVE:
-                    return "rm";
-                case UPDATE:
-                    return "up";
-                case MOVE:
-                    return "mv";
-            }
-            return "??";
-        }
-
-        @Override
-        public String toString() {
-            return "[" + cmdToString() + ",s:" + positionStart + "c:" + itemCount + "]";
-        }
-
-        @Override
-        public boolean equals(Object o) {
-            if (this == o) {
-                return true;
-            }
-            if (o == null || getClass() != o.getClass()) {
-                return false;
-            }
-
-            UpdateOp op = (UpdateOp) o;
-
-            if (cmd != op.cmd) {
-                return false;
-            }
-            if (cmd == MOVE && Math.abs(itemCount - positionStart) == 1) {
-                // reverse of this is also true
-                if (itemCount == op.positionStart && positionStart == op.itemCount) {
-                    return true;
-                }
-            }
-            if (itemCount != op.itemCount) {
-                return false;
-            }
-            if (positionStart != op.positionStart) {
-                return false;
-            }
-
-            return true;
-        }
-
-        @Override
-        public int hashCode() {
-            int result = cmd;
-            result = 31 * result + positionStart;
-            result = 31 * result + itemCount;
-            return result;
-        }
-    }
-
-    @Override
-    public UpdateOp obtainUpdateOp(int cmd, int positionStart, int itemCount) {
-        UpdateOp op = mUpdateOpPool.acquire();
-        if (op == null) {
-            op = new UpdateOp(cmd, positionStart, itemCount);
-        } else {
-            op.cmd = cmd;
-            op.positionStart = positionStart;
-            op.itemCount = itemCount;
-        }
-        return op;
-    }
-
-    @Override
-    public void recycleUpdateOp(UpdateOp op) {
-        if (!mDisableRecycler) {
-            mUpdateOpPool.release(op);
-        }
-    }
-
-    void recycleUpdateOpsAndClearList(List<UpdateOp> ops) {
-        final int count = ops.size();
-        for (int i = 0; i < count; i++) {
-            recycleUpdateOp(ops.get(i));
-        }
-        ops.clear();
-    }
-
-    /**
-     * Contract between AdapterHelper and RecyclerView.
-     */
-    static interface Callback {
-
-        ViewHolder findViewHolder(int position);
-
-        void offsetPositionsForRemovingInvisible(int positionStart, int itemCount);
-
-        void offsetPositionsForRemovingLaidOutOrNewView(int positionStart, int itemCount);
-
-        void markViewHoldersUpdated(int positionStart, int itemCount);
-
-        void onDispatchFirstPass(UpdateOp updateOp);
-
-        void onDispatchSecondPass(UpdateOp updateOp);
-
-        void offsetPositionsForAdd(int positionStart, int itemCount);
-
-        void offsetPositionsForMove(int from, int to);
-    }
-}

app/src/main/java/android/support/v7/widget/ChildHelper.java

@@ -1,484 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.support.v7.widget;
-
-import android.util.Log;
-import android.view.View;
-import android.view.ViewGroup;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Helper class to manage children.
- * <p>
- * It wraps a RecyclerView and adds ability to hide some children. There are two sets of methods
- * provided by this class. <b>Regular</b> methods are the ones that replicate ViewGroup methods
- * like getChildAt, getChildCount etc. These methods ignore hidden children.
- * <p>
- * When RecyclerView needs direct access to the view group children, it can call unfiltered
- * methods like get getUnfilteredChildCount or getUnfilteredChildAt.
- */
-class ChildHelper {
-
-    private static final boolean DEBUG = false;
-
-    private static final String TAG = "ChildrenHelper";
-
-    final Callback mCallback;
-
-    final Bucket mBucket;
-
-    final List<View> mHiddenViews;
-
-    ChildHelper(Callback callback) {
-        mCallback = callback;
-        mBucket = new Bucket();
-        mHiddenViews = new ArrayList<View>();
-    }
-
-    /**
-     * Adds a view to the ViewGroup
-     *
-     * @param child  View to add.
-     * @param hidden If set to true, this item will be invisible from regular methods.
-     */
-    void addView(View child, boolean hidden) {
-        addView(child, -1, hidden);
-    }
-
-    /**
-     * Add a view to the ViewGroup at an index
-     *
-     * @param child  View to add.
-     * @param index  Index of the child from the regular perspective (excluding hidden views).
-     *               ChildHelper offsets this index to actual ViewGroup index.
-     * @param hidden If set to true, this item will be invisible from regular methods.
-     */
-    void addView(View child, int index, boolean hidden) {
-        final int offset;
-        if (index < 0) {
-            offset = mCallback.getChildCount();
-        } else {
-            offset = getOffset(index);
-        }
-        mCallback.addView(child, offset);
-        mBucket.insert(offset, hidden);
-        if (hidden) {
-            mHiddenViews.add(child);
-        }
-        if (DEBUG) {
-            Log.d(TAG, "addViewAt " + index + ",h:" + hidden + ", " + this);
-        }
-    }
-
-    private int getOffset(int index) {
-        if (index < 0) {
-            return -1; //anything below 0 won't work as diff will be undefined.
-        }
-        final int limit = mCallback.getChildCount();
-        int offset = index;
-        while (offset < limit) {
-            final int removedBefore = mBucket.countOnesBefore(offset);
-            final int diff = index - (offset - removedBefore);
-            if (diff == 0) {
-                while (mBucket.get(offset)) { // ensure this offset is not hidden
-                    offset ++;
-                }
-                return offset;
-            } else {
-                offset += diff;
-            }
-        }
-        return -1;
-    }
-
-    /**
-     * Removes the provided View from underlying RecyclerView.
-     *
-     * @param view The view to remove.
-     */
-    void removeView(View view) {
-        int index = mCallback.indexOfChild(view);
-        if (index < 0) {
-            return;
-        }
-        mCallback.removeViewAt(index);
-        if (mBucket.remove(index)) {
-            mHiddenViews.remove(view);
-        }
-        if (DEBUG) {
-            Log.d(TAG, "remove View off:" + index + "," + this);
-        }
-    }
-
-    /**
-     * Removes the view at the provided index from RecyclerView.
-     *
-     * @param index Index of the child from the regular perspective (excluding hidden views).
-     *              ChildHelper offsets this index to actual ViewGroup index.
-     */
-    void removeViewAt(int index) {
-        final int offset = getOffset(index);
-        final View view = mCallback.getChildAt(offset);
-        if (view == null) {
-            return;
-        }
-        mCallback.removeViewAt(offset);
-        if (mBucket.remove(offset)) {
-            mHiddenViews.remove(view);
-        }
-        if (DEBUG) {
-            Log.d(TAG, "removeViewAt " + index + ", off:" + offset + ", " + this);
-        }
-    }
-
-    /**
-     * Returns the child at provided index.
-     *
-     * @param index Index of the child to return in regular perspective.
-     */
-    View getChildAt(int index) {
-        final int offset = getOffset(index);
-        return mCallback.getChildAt(offset);
-    }
-
-    /**
-     * Removes all views from the ViewGroup including the hidden ones.
-     */
-    void removeAllViewsUnfiltered() {
-        mCallback.removeAllViews();
-        mBucket.reset();
-        mHiddenViews.clear();
-        if (DEBUG) {
-            Log.d(TAG, "removeAllViewsUnfiltered");
-        }
-    }
-
-    /**
-     * This can be used to find a disappearing view by position.
-     *
-     * @param position The adapter position of the item.
-     * @param type     View type, can be {@link RecyclerView#INVALID_TYPE}.
-     * @return         A hidden view with a valid ViewHolder that matches the position and type.
-     */
-    View findHiddenNonRemovedView(int position, int type) {
-        final int count = mHiddenViews.size();
-        for (int i = 0; i < count; i++) {
-            final View view = mHiddenViews.get(i);
-            RecyclerView.ViewHolder holder = mCallback.getChildViewHolder(view);
-            if (holder.getPosition() == position && !holder.isInvalid() &&
-                    (type == RecyclerView.INVALID_TYPE || holder.getItemViewType() == type)) {
-                return view;
-            }
-        }
-        return null;
-    }
-
-    /**
-     * Attaches the provided view to the underlying ViewGroup.
-     *
-     * @param child        Child to attach.
-     * @param index        Index of the child to attach in regular perspective.
-     * @param layoutParams LayoutParams for the child.
-     * @param hidden       If set to true, this item will be invisible to the regular methods.
-     */
-    void attachViewToParent(View child, int index, ViewGroup.LayoutParams layoutParams,
-            boolean hidden) {
-        final int offset;
-        if (index < 0) {
-            offset = mCallback.getChildCount();
-        } else {
-            offset = getOffset(index);
-        }
-        mCallback.attachViewToParent(child, offset, layoutParams);
-        mBucket.insert(offset, hidden);
-        if (DEBUG) {
-            Log.d(TAG, "attach view to parent index:" + index + ",off:" + offset + "," +
-                    "h:" + hidden + ", " + this);
-        }
-    }
-
-    /**
-     * Returns the number of children that are not hidden.
-     *
-     * @return Number of children that are not hidden.
-     * @see #getChildAt(int)
-     */
-    int getChildCount() {
-        return mCallback.getChildCount() - mHiddenViews.size();
-    }
-
-    /**
-     * Returns the total number of children.
-     *
-     * @return The total number of children including the hidden views.
-     * @see #getUnfilteredChildAt(int)
-     */
-    int getUnfilteredChildCount() {
-        return mCallback.getChildCount();
-    }
-
-    /**
-     * Returns a child by ViewGroup offset. ChildHelper won't offset this index.
-     *
-     * @param index ViewGroup index of the child to return.
-     * @return The view in the provided index.
-     */
-    View getUnfilteredChildAt(int index) {
-        return mCallback.getChildAt(index);
-    }
-
-    /**
-     * Detaches the view at the provided index.
-     *
-     * @param index Index of the child to return in regular perspective.
-     */
-    void detachViewFromParent(int index) {
-        final int offset = getOffset(index);
-        mCallback.detachViewFromParent(offset);
-        mBucket.remove(offset);
-        if (DEBUG) {
-            Log.d(TAG, "detach view from parent " + index + ", off:" + offset);
-        }
-    }
-
-    /**
-     * Returns the index of the child in regular perspective.
-     *
-     * @param child The child whose index will be returned.
-     * @return The regular perspective index of the child or -1 if it does not exists.
-     */
-    int indexOfChild(View child) {
-        final int index = mCallback.indexOfChild(child);
-        if (index == -1) {
-            return -1;
-        }
-        if (mBucket.get(index)) {
-            if (DEBUG) {
-                throw new IllegalArgumentException("cannot get index of a hidden child");
-            } else {
-                return -1;
-            }
-        }
-        // reverse the index
-        return index - mBucket.countOnesBefore(index);
-    }
-
-    /**
-     * Returns whether a View is visible to LayoutManager or not.
-     *
-     * @param view The child view to check. Should be a child of the Callback.
-     * @return True if the View is not visible to LayoutManager
-     */
-    boolean isHidden(View view) {
-        return mHiddenViews.contains(view);
-    }
-
-    /**
-     * Marks a child view as hidden.
-     *
-     * @param view The view to hide.
-     */
-    void hide(View view) {
-        final int offset = mCallback.indexOfChild(view);
-        if (offset < 0) {
-            throw new IllegalArgumentException("view is not a child, cannot hide " + view);
-        }
-        if (DEBUG && mBucket.get(offset)) {
-            throw new RuntimeException("trying to hide same view twice, how come ? " + view);
-        }
-        mBucket.set(offset);
-        mHiddenViews.add(view);
-        if (DEBUG) {
-            Log.d(TAG, "hiding child " + view + " at offset " + offset+ ", " + this);
-        }
-    }
-
-    @Override
-    public String toString() {
-        return mBucket.toString();
-    }
-
-    /**
-     * Removes a view from the ViewGroup if it is hidden.
-     *
-     * @param view The view to remove.
-     * @return True if the View is found and it is hidden. False otherwise.
-     */
-    boolean removeViewIfHidden(View view) {
-        final int index = mCallback.indexOfChild(view);
-        if (index == -1) {
-            if (mHiddenViews.remove(view) && DEBUG) {
-                throw new IllegalStateException("view is in hidden list but not in view group");
-            }
-            return true;
-        }
-        if (mBucket.get(index)) {
-            mBucket.remove(index);
-            mCallback.removeViewAt(index);
-            if (!mHiddenViews.remove(view) && DEBUG) {
-                throw new IllegalStateException(
-                        "removed a hidden view but it is not in hidden views list");
-            }
-            return true;
-        }
-        return false;
-    }
-
-    /**
-     * Bitset implementation that provides methods to offset indices.
-     */
-    static class Bucket {
-
-        final static int BITS_PER_WORD = Long.SIZE;
-
-        final static long LAST_BIT = 1L << (Long.SIZE - 1);
-
-        long mData = 0;
-
-        Bucket next;
-
-        void set(int index) {
-            if (index >= BITS_PER_WORD) {
-                ensureNext();
-                next.set(index - BITS_PER_WORD);
-            } else {
-                mData |= 1L << index;
-            }
-        }
-
-        private void ensureNext() {
-            if (next == null) {
-                next = new Bucket();
-            }
-        }
-
-        void clear(int index) {
-            if (index >= BITS_PER_WORD) {
-                if (next != null) {
-                    next.clear(index - BITS_PER_WORD);
-                }
-            } else {
-                mData &= ~(1L << index);
-            }
-
-        }
-
-        boolean get(int index) {
-            if (index >= BITS_PER_WORD) {
-                ensureNext();
-                return next.get(index - BITS_PER_WORD);
-            } else {
-                return (mData & (1L << index)) != 0;
-            }
-        }
-
-        void reset() {
-            mData = 0;
-            if (next != null) {
-                next.reset();
-            }
-        }
-
-        void insert(int index, boolean value) {
-            if (index >= BITS_PER_WORD) {
-                ensureNext();
-                next.insert(index - BITS_PER_WORD, value);
-            } else {
-                final boolean lastBit = (mData & LAST_BIT) != 0;
-                long mask = (1L << index) - 1;
-                final long before = mData & mask;
-                final long after = ((mData & ~mask)) << 1;
-                mData = before | after;
-                if (value) {
-                    set(index);
-                } else {
-                    clear(index);
-                }
-                if (lastBit || next != null) {
-                    ensureNext();
-                    next.insert(0, lastBit);
-                }
-            }
-        }
-
-        boolean remove(int index) {
-            if (index >= BITS_PER_WORD) {
-                ensureNext();
-                return next.remove(index - BITS_PER_WORD);
-            } else {
-                long mask = (1L << index);
-                final boolean value = (mData & mask) != 0;
-                mData &= ~mask;
-                mask = mask - 1;
-                final long before = mData & mask;
-                // cannot use >> because it adds one.
-                final long after = Long.rotateRight(mData & ~mask, 1);
-                mData = before | after;
-                if (next != null) {
-                    if (next.get(0)) {
-                        set(BITS_PER_WORD - 1);
-                    }
-                    next.remove(0);
-                }
-                return value;
-            }
-        }
-
-        int countOnesBefore(int index) {
-            if (next == null) {
-                if (index >= BITS_PER_WORD) {
-                    return Long.bitCount(mData);
-                }
-                return Long.bitCount(mData & ((1L << index) - 1));
-            }
-            if (index < BITS_PER_WORD) {
-                return Long.bitCount(mData & ((1L << index) - 1));
-            } else {
-                return next.countOnesBefore(index - BITS_PER_WORD) + Long.bitCount(mData);
-            }
-        }
-
-        @Override
-        public String toString() {
-            return next == null ? Long.toBinaryString(mData)
-                    : next.toString() + "xx" + Long.toBinaryString(mData);
-        }
-    }
-
-    static interface Callback {
-
-        int getChildCount();
-
-        void addView(View child, int index);
-
-        int indexOfChild(View view);
-
-        void removeViewAt(int index);
-
-        View getChildAt(int offset);
-
-        void removeAllViews();
-
-        RecyclerView.ViewHolder getChildViewHolder(View view);
-
-        void attachViewToParent(View child, int index, ViewGroup.LayoutParams layoutParams);
-
-        void detachViewFromParent(int offset);
-    }
-}

app/src/main/java/android/support/v7/widget/DefaultItemAnimator.java

@@ -1,628 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.support.v7.widget;
-
-import android.support.v4.view.ViewCompat;
-import android.support.v4.view.ViewPropertyAnimatorCompat;
-import android.support.v4.view.ViewPropertyAnimatorListener;
-import android.support.v7.widget.RecyclerView.ViewHolder;
-import android.view.View;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * This implementation of {@link RecyclerView.ItemAnimator} provides basic
- * animations on remove, add, and move events that happen to the items in
- * a RecyclerView. RecyclerView uses a DefaultItemAnimator by default.
- *
- * @see RecyclerView#setItemAnimator(RecyclerView.ItemAnimator)
- */
-public class DefaultItemAnimator extends RecyclerView.ItemAnimator {
-    private static final boolean DEBUG = false;
-
-    private ArrayList<ViewHolder> mPendingRemovals = new ArrayList<ViewHolder>();
-    private ArrayList<ViewHolder> mPendingAdditions = new ArrayList<ViewHolder>();
-    private ArrayList<MoveInfo> mPendingMoves = new ArrayList<MoveInfo>();
-    private ArrayList<ChangeInfo> mPendingChanges = new ArrayList<ChangeInfo>();
-
-    private ArrayList<ArrayList<ViewHolder>> mAdditionsList =
-            new ArrayList<ArrayList<ViewHolder>>();
-    private ArrayList<ArrayList<MoveInfo>> mMovesList = new ArrayList<ArrayList<MoveInfo>>();
-    private ArrayList<ArrayList<ChangeInfo>> mChangesList = new ArrayList<ArrayList<ChangeInfo>>();
-
-    private ArrayList<ViewHolder> mAddAnimations = new ArrayList<ViewHolder>();
-    private ArrayList<ViewHolder> mMoveAnimations = new ArrayList<ViewHolder>();
-    private ArrayList<ViewHolder> mRemoveAnimations = new ArrayList<ViewHolder>();
-    private ArrayList<ViewHolder> mChangeAnimations = new ArrayList<ViewHolder>();
-
-    private static class MoveInfo {
-        public ViewHolder holder;
-        public int fromX, fromY, toX, toY;
-
-        private MoveInfo(ViewHolder holder, int fromX, int fromY, int toX, int toY) {
-            this.holder = holder;
-            this.fromX = fromX;
-            this.fromY = fromY;
-            this.toX = toX;
-            this.toY = toY;
-        }
-    }
-
-    private static class ChangeInfo {
-        public ViewHolder oldHolder, newHolder;
-        public int fromX, fromY, toX, toY;
-        private ChangeInfo(ViewHolder oldHolder, ViewHolder newHolder) {
-            this.oldHolder = oldHolder;
-            this.newHolder = newHolder;
-        }
-
-        private ChangeInfo(ViewHolder oldHolder, ViewHolder newHolder,
-                int fromX, int fromY, int toX, int toY) {
-            this(oldHolder, newHolder);
-            this.fromX = fromX;
-            this.fromY = fromY;
-            this.toX = toX;
-            this.toY = toY;
-        }
-
-        @Override
-        public String toString() {
-            return "ChangeInfo{" +
-                    "oldHolder=" + oldHolder +
-                    ", newHolder=" + newHolder +
-                    ", fromX=" + fromX +
-                    ", fromY=" + fromY +
-                    ", toX=" + toX +
-                    ", toY=" + toY +
-                    '}';
-        }
-    }
-
-    @Override
-    public void runPendingAnimations() {
-        boolean removalsPending = !mPendingRemovals.isEmpty();
-        boolean movesPending = !mPendingMoves.isEmpty();
-        boolean changesPending = !mPendingChanges.isEmpty();
-        boolean additionsPending = !mPendingAdditions.isEmpty();
-        if (!removalsPending && !movesPending && !additionsPending && !changesPending) {
-            // nothing to animate
-            return;
-        }
-        // First, remove stuff
-        for (ViewHolder holder : mPendingRemovals) {
-            animateRemoveImpl(holder);
-        }
-        mPendingRemovals.clear();
-        // Next, move stuff
-        if (movesPending) {
-            final ArrayList<MoveInfo> moves = new ArrayList<MoveInfo>();
-            moves.addAll(mPendingMoves);
-            mMovesList.add(moves);
-            mPendingMoves.clear();
-            Runnable mover = new Runnable() {
-                @Override
-                public void run() {
-                    for (MoveInfo moveInfo : moves) {
-                        animateMoveImpl(moveInfo.holder, moveInfo.fromX, moveInfo.fromY,
-                                moveInfo.toX, moveInfo.toY);
-                    }
-                    moves.clear();
-                    mMovesList.remove(moves);
-                }
-            };
-            if (removalsPending) {
-                View view = moves.get(0).holder.itemView;
-                ViewCompat.postOnAnimationDelayed(view, mover, getRemoveDuration());
-            } else {
-                mover.run();
-            }
-        }
-        // Next, change stuff, to run in parallel with move animations
-        if (changesPending) {
-            final ArrayList<ChangeInfo> changes = new ArrayList<ChangeInfo>();
-            changes.addAll(mPendingChanges);
-            mChangesList.add(changes);
-            mPendingChanges.clear();
-            Runnable changer = new Runnable() {
-                @Override
-                public void run() {
-                    for (ChangeInfo change : changes) {
-                        animateChangeImpl(change);
-                    }
-                    changes.clear();
-                    mChangesList.remove(changes);
-                }
-            };
-            if (removalsPending) {
-                ViewHolder holder = changes.get(0).oldHolder;
-                ViewCompat.postOnAnimationDelayed(holder.itemView, changer, getRemoveDuration());
-            } else {
-                changer.run();
-            }
-        }
-        // Next, add stuff
-        if (additionsPending) {
-            final ArrayList<ViewHolder> additions = new ArrayList<ViewHolder>();
-            additions.addAll(mPendingAdditions);
-            mAdditionsList.add(additions);
-            mPendingAdditions.clear();
-            Runnable adder = new Runnable() {
-                public void run() {
-                    for (ViewHolder holder : additions) {
-                        animateAddImpl(holder);
-                    }
-                    additions.clear();
-                    mAdditionsList.remove(additions);
-                }
-            };
-            if (removalsPending || movesPending || changesPending) {
-                long removeDuration = removalsPending ? getRemoveDuration() : 0;
-                long moveDuration = movesPending ? getMoveDuration() : 0;
-                long changeDuration = changesPending ? getChangeDuration() : 0;
-                long totalDelay = removeDuration + Math.max(moveDuration, changeDuration);
-                View view = additions.get(0).itemView;
-                ViewCompat.postOnAnimationDelayed(view, adder, totalDelay);
-            } else {
-                adder.run();
-            }
-        }
-    }
-
-    @Override
-    public boolean animateRemove(final ViewHolder holder) {
-        endAnimation(holder);
-        mPendingRemovals.add(holder);
-        return true;
-    }
-
-    private void animateRemoveImpl(final ViewHolder holder) {
-        final View view = holder.itemView;
-        final ViewPropertyAnimatorCompat animation = ViewCompat.animate(view);
-        animation.setDuration(getRemoveDuration())
-                .alpha(0).setListener(new VpaListenerAdapter() {
-            @Override
-            public void onAnimationStart(View view) {
-                dispatchRemoveStarting(holder);
-            }
-            @Override
-            public void onAnimationEnd(View view) {
-                animation.setListener(null);
-                ViewCompat.setAlpha(view, 1);
-                dispatchRemoveFinished(holder);
-                mRemoveAnimations.remove(holder);
-                dispatchFinishedWhenDone();
-            }
-        }).start();
-        mRemoveAnimations.add(holder);
-    }
-
-    @Override
-    public boolean animateAdd(final ViewHolder holder) {
-        endAnimation(holder);
-        ViewCompat.setAlpha(holder.itemView, 0);
-        mPendingAdditions.add(holder);
-        return true;
-    }
-
-    private void animateAddImpl(final ViewHolder holder) {
-        final View view = holder.itemView;
-        mAddAnimations.add(holder);
-        final ViewPropertyAnimatorCompat animation = ViewCompat.animate(view);
-        animation.alpha(1).setDuration(getAddDuration()).
-                setListener(new VpaListenerAdapter() {
-                    @Override
-                    public void onAnimationStart(View view) {
-                        dispatchAddStarting(holder);
-                    }
-                    @Override
-                    public void onAnimationCancel(View view) {
-                        ViewCompat.setAlpha(view, 1);
-                    }
-
-                    @Override
-                    public void onAnimationEnd(View view) {
-                        animation.setListener(null);
-                        dispatchAddFinished(holder);
-                        mAddAnimations.remove(holder);
-                        dispatchFinishedWhenDone();
-                    }
-                }).start();
-    }
-
-    @Override
-    public boolean animateMove(final ViewHolder holder, int fromX, int fromY,
-            int toX, int toY) {
-        final View view = holder.itemView;
-        fromX += ViewCompat.getTranslationX(holder.itemView);
-        fromY += ViewCompat.getTranslationY(holder.itemView);
-        endAnimation(holder);
-        int deltaX = toX - fromX;
-        int deltaY = toY - fromY;
-        if (deltaX == 0 && deltaY == 0) {
-            dispatchMoveFinished(holder);
-            return false;
-        }
-        if (deltaX != 0) {
-            ViewCompat.setTranslationX(view, -deltaX);
-        }
-        if (deltaY != 0) {
-            ViewCompat.setTranslationY(view, -deltaY);
-        }
-        mPendingMoves.add(new MoveInfo(holder, fromX, fromY, toX, toY));
-        return true;
-    }
-
-    private void animateMoveImpl(final ViewHolder holder, int fromX, int fromY, int toX, int toY) {
-        final View view = holder.itemView;
-        final int deltaX = toX - fromX;
-        final int deltaY = toY - fromY;
-        if (deltaX != 0) {
-            ViewCompat.animate(view).translationX(0);
-        }
-        if (deltaY != 0) {
-            ViewCompat.animate(view).translationY(0);
-        }
-        // TODO: make EndActions end listeners instead, since end actions aren't called when
-        // vpas are canceled (and can't end them. why?)
-        // need listener functionality in VPACompat for this. Ick.
-        mMoveAnimations.add(holder);
-        final ViewPropertyAnimatorCompat animation = ViewCompat.animate(view);
-        animation.setDuration(getMoveDuration()).setListener(new VpaListenerAdapter() {
-            @Override
-            public void onAnimationStart(View view) {
-                dispatchMoveStarting(holder);
-            }
-            @Override
-            public void onAnimationCancel(View view) {
-                if (deltaX != 0) {
-                    ViewCompat.setTranslationX(view, 0);
-                }
-                if (deltaY != 0) {
-                    ViewCompat.setTranslationY(view, 0);
-                }
-            }
-            @Override
-            public void onAnimationEnd(View view) {
-                animation.setListener(null);
-                dispatchMoveFinished(holder);
-                mMoveAnimations.remove(holder);
-                dispatchFinishedWhenDone();
-            }
-        }).start();
-    }
-
-    @Override
-    public boolean animateChange(ViewHolder oldHolder, ViewHolder newHolder,
-            int fromX, int fromY, int toX, int toY) {
-        final float prevTranslationX = ViewCompat.getTranslationX(oldHolder.itemView);
-        final float prevTranslationY = ViewCompat.getTranslationY(oldHolder.itemView);
-        final float prevAlpha = ViewCompat.getAlpha(oldHolder.itemView);
-        endAnimation(oldHolder);
-        int deltaX = (int) (toX - fromX - prevTranslationX);
-        int deltaY = (int) (toY - fromY - prevTranslationY);
-        // recover prev translation state after ending animation
-        ViewCompat.setTranslationX(oldHolder.itemView, prevTranslationX);
-        ViewCompat.setTranslationY(oldHolder.itemView, prevTranslationY);
-        ViewCompat.setAlpha(oldHolder.itemView, prevAlpha);
-        if (newHolder != null && newHolder.itemView != null) {
-            // carry over translation values
-            endAnimation(newHolder);
-            ViewCompat.setTranslationX(newHolder.itemView, -deltaX);
-            ViewCompat.setTranslationY(newHolder.itemView, -deltaY);
-            ViewCompat.setAlpha(newHolder.itemView, 0);
-        }
-        mPendingChanges.add(new ChangeInfo(oldHolder, newHolder, fromX, fromY, toX, toY));
-        return true;
-    }
-
-    private void animateChangeImpl(final ChangeInfo changeInfo) {
-        final ViewHolder holder = changeInfo.oldHolder;
-        final View view = holder.itemView;
-        final ViewHolder newHolder = changeInfo.newHolder;
-        final View newView = newHolder != null ? newHolder.itemView : null;
-        mChangeAnimations.add(changeInfo.oldHolder);
-
-        final ViewPropertyAnimatorCompat oldViewAnim = ViewCompat.animate(view).setDuration(
-                getChangeDuration());
-        oldViewAnim.translationX(changeInfo.toX - changeInfo.fromX);
-        oldViewAnim.translationY(changeInfo.toY - changeInfo.fromY);
-        oldViewAnim.alpha(0).setListener(new VpaListenerAdapter() {
-            @Override
-            public void onAnimationStart(View view) {
-                dispatchChangeStarting(changeInfo.oldHolder, true);
-            }
-            @Override
-            public void onAnimationEnd(View view) {
-                oldViewAnim.setListener(null);
-                ViewCompat.setAlpha(view, 1);
-                ViewCompat.setTranslationX(view, 0);
-                ViewCompat.setTranslationY(view, 0);
-                dispatchChangeFinished(changeInfo.oldHolder, true);
-                mChangeAnimations.remove(changeInfo.oldHolder);
-                dispatchFinishedWhenDone();
-            }
-        }).start();
-        if (newView != null) {
-            mChangeAnimations.add(changeInfo.newHolder);
-            final ViewPropertyAnimatorCompat newViewAnimation = ViewCompat.animate(newView);
-            newViewAnimation.translationX(0).translationY(0).setDuration(getChangeDuration()).
-                    alpha(1).setListener(new VpaListenerAdapter() {
-                @Override
-                public void onAnimationStart(View view) {
-                    dispatchChangeStarting(changeInfo.newHolder, false);
-                }
-                @Override
-                public void onAnimationEnd(View view) {
-                    newViewAnimation.setListener(null);
-                    ViewCompat.setAlpha(newView, 1);
-                    ViewCompat.setTranslationX(newView, 0);
-                    ViewCompat.setTranslationY(newView, 0);
-                    dispatchChangeFinished(changeInfo.newHolder, false);
-                    mChangeAnimations.remove(changeInfo.newHolder);
-                    dispatchFinishedWhenDone();
-                }
-            }).start();
-        }
-    }
-
-    private void endChangeAnimation(List<ChangeInfo> infoList, ViewHolder item) {
-        for (int i = infoList.size() - 1; i >= 0; i--) {
-            ChangeInfo changeInfo = infoList.get(i);
-            if (endChangeAnimationIfNecessary(changeInfo, item)) {
-                if (changeInfo.oldHolder == null && changeInfo.newHolder == null) {
-                    infoList.remove(changeInfo);
-                }
-            }
-        }
-    }
-
-    private void endChangeAnimationIfNecessary(ChangeInfo changeInfo) {
-        if (changeInfo.oldHolder != null) {
-            endChangeAnimationIfNecessary(changeInfo, changeInfo.oldHolder);
-        }
-        if (changeInfo.newHolder != null) {
-            endChangeAnimationIfNecessary(changeInfo, changeInfo.newHolder);
-        }
-    }
-    private boolean endChangeAnimationIfNecessary(ChangeInfo changeInfo, ViewHolder item) {
-        boolean oldItem = false;
-        if (changeInfo.newHolder == item) {
-            changeInfo.newHolder = null;
-        } else if (changeInfo.oldHolder == item) {
-            changeInfo.oldHolder = null;
-            oldItem = true;
-        } else {
-            return false;
-        }
-        ViewCompat.setAlpha(item.itemView, 1);
-        ViewCompat.setTranslationX(item.itemView, 0);
-        ViewCompat.setTranslationY(item.itemView, 0);
-        dispatchChangeFinished(item, oldItem);
-        return true;
-    }
-
-    @Override
-    public void endAnimation(ViewHolder item) {
-        final View view = item.itemView;
-        // this will trigger end callback which should set properties to their target values.
-        ViewCompat.animate(view).cancel();
-        // TODO if some other animations are chained to end, how do we cancel them as well?
-        for (int i = mPendingMoves.size() - 1; i >= 0; i--) {
-            MoveInfo moveInfo = mPendingMoves.get(i);
-            if (moveInfo.holder == item) {
-                ViewCompat.setTranslationY(view, 0);
-                ViewCompat.setTranslationX(view, 0);
-                dispatchMoveFinished(item);
-                mPendingMoves.remove(item);
-            }
-        }
-        endChangeAnimation(mPendingChanges, item);
-        if (mPendingRemovals.remove(item)) {
-            ViewCompat.setAlpha(view, 1);
-            dispatchRemoveFinished(item);
-        }
-        if (mPendingAdditions.remove(item)) {
-            ViewCompat.setAlpha(view, 1);
-            dispatchAddFinished(item);
-        }
-
-        for (int i = mChangesList.size() - 1; i >= 0; i--) {
-            ArrayList<ChangeInfo> changes = mChangesList.get(i);
-            endChangeAnimation(changes, item);
-            if (changes.isEmpty()) {
-                mChangesList.remove(changes);
-            }
-        }
-        for (int i = mMovesList.size() - 1; i >= 0; i--) {
-            ArrayList<MoveInfo> moves = mMovesList.get(i);
-            for (int j = moves.size() - 1; j >= 0; j--) {
-                MoveInfo moveInfo = moves.get(j);
-                if (moveInfo.holder == item) {
-                    ViewCompat.setTranslationY(view, 0);
-                    ViewCompat.setTranslationX(view, 0);
-                    dispatchMoveFinished(item);
-                    moves.remove(j);
-                    if (moves.isEmpty()) {
-                        mMovesList.remove(moves);
-                    }
-                    break;
-                }
-            }
-        }
-        for (int i = mAdditionsList.size() - 1; i >= 0; i--) {
-            ArrayList<ViewHolder> additions = mAdditionsList.get(i);
-            if (additions.remove(item)) {
-                ViewCompat.setAlpha(view, 1);
-                dispatchAddFinished(item);
-                if (additions.isEmpty()) {
-                    mAdditionsList.remove(additions);
-                }
-            }
-        }
-
-        // animations should be ended by the cancel above.
-        if (mRemoveAnimations.remove(item) && DEBUG) {
-            throw new IllegalStateException("after animation is cancelled, item should not be in "
-                    + "mRemoveAnimations list");
-        }
-
-        if (mAddAnimations.remove(item) && DEBUG) {
-            throw new IllegalStateException("after animation is cancelled, item should not be in "
-                    + "mAddAnimations list");
-        }
-
-        if (mChangeAnimations.remove(item) && DEBUG) {
-            throw new IllegalStateException("after animation is cancelled, item should not be in "
-                    + "mChangeAnimations list");
-        }
-
-        if (mMoveAnimations.remove(item) && DEBUG) {
-            throw new IllegalStateException("after animation is cancelled, item should not be in "
-                    + "mMoveAnimations list");
-        }
-        dispatchFinishedWhenDone();
-    }
-
-    @Override
-    public boolean isRunning() {
-        return (!mPendingAdditions.isEmpty() ||
-                !mPendingChanges.isEmpty() ||
-                !mPendingMoves.isEmpty() ||
-                !mPendingRemovals.isEmpty() ||
-                !mMoveAnimations.isEmpty() ||
-                !mRemoveAnimations.isEmpty() ||
-                !mAddAnimations.isEmpty() ||
-                !mChangeAnimations.isEmpty() ||
-                !mMovesList.isEmpty() ||
-                !mAdditionsList.isEmpty() ||
-                !mChangesList.isEmpty());
-    }
-
-    /**
-     * Check the state of currently pending and running animations. If there are none
-     * pending/running, call {@link #dispatchAnimationsFinished()} to notify any
-     * listeners.
-     */
-    private void dispatchFinishedWhenDone() {
-        if (!isRunning()) {
-            dispatchAnimationsFinished();
-        }
-    }
-
-    @Override
-    public void endAnimations() {
-        int count = mPendingMoves.size();
-        for (int i = count - 1; i >= 0; i--) {
-            MoveInfo item = mPendingMoves.get(i);
-            View view = item.holder.itemView;
-            ViewCompat.setTranslationY(view, 0);
-            ViewCompat.setTranslationX(view, 0);
-            dispatchMoveFinished(item.holder);
-            mPendingMoves.remove(i);
-        }
-        count = mPendingRemovals.size();
-        for (int i = count - 1; i >= 0; i--) {
-            ViewHolder item = mPendingRemovals.get(i);
-            dispatchRemoveFinished(item);
-            mPendingRemovals.remove(i);
-        }
-        count = mPendingAdditions.size();
-        for (int i = count - 1; i >= 0; i--) {
-            ViewHolder item = mPendingAdditions.get(i);
-            View view = item.itemView;
-            ViewCompat.setAlpha(view, 1);
-            dispatchAddFinished(item);
-            mPendingAdditions.remove(i);
-        }
-        count = mPendingChanges.size();
-        for (int i = count - 1; i >= 0; i--) {
-            endChangeAnimationIfNecessary(mPendingChanges.get(i));
-        }
-        mPendingChanges.clear();
-        if (!isRunning()) {
-            return;
-        }
-
-        int listCount = mMovesList.size();
-        for (int i = listCount - 1; i >= 0; i--) {
-            ArrayList<MoveInfo> moves = mMovesList.get(i);
-            count = moves.size();
-            for (int j = count - 1; j >= 0; j--) {
-                MoveInfo moveInfo = moves.get(j);
-                ViewHolder item = moveInfo.holder;
-                View view = item.itemView;
-                ViewCompat.setTranslationY(view, 0);
-                ViewCompat.setTranslationX(view, 0);
-                dispatchMoveFinished(moveInfo.holder);
-                moves.remove(j);
-                if (moves.isEmpty()) {
-                    mMovesList.remove(moves);
-                }
-            }
-        }
-        listCount = mAdditionsList.size();
-        for (int i = listCount - 1; i >= 0; i--) {
-            ArrayList<ViewHolder> additions = mAdditionsList.get(i);
-            count = additions.size();
-            for (int j = count - 1; j >= 0; j--) {
-                ViewHolder item = additions.get(j);
-                View view = item.itemView;
-                ViewCompat.setAlpha(view, 1);
-                dispatchAddFinished(item);
-                additions.remove(j);
-                if (additions.isEmpty()) {
-                    mAdditionsList.remove(additions);
-                }
-            }
-        }
-        listCount = mChangesList.size();
-        for (int i = listCount - 1; i >= 0; i--) {
-            ArrayList<ChangeInfo> changes = mChangesList.get(i);
-            count = changes.size();
-            for (int j = count - 1; j >= 0; j--) {
-                endChangeAnimationIfNecessary(changes.get(j));
-                if (changes.isEmpty()) {
-                    mChangesList.remove(changes);
-                }
-            }
-        }
-
-        cancelAll(mRemoveAnimations);
-        cancelAll(mMoveAnimations);
-        cancelAll(mAddAnimations);
-        cancelAll(mChangeAnimations);
-
-        dispatchAnimationsFinished();
-    }
-
-    void cancelAll(List<ViewHolder> viewHolders) {
-        for (int i = viewHolders.size() - 1; i >= 0; i--) {
-            ViewCompat.animate(viewHolders.get(i).itemView).cancel();
-        }
-    }
-
-    private static class VpaListenerAdapter implements ViewPropertyAnimatorListener {
-        @Override
-        public void onAnimationStart(View view) {}
-
-        @Override
-        public void onAnimationEnd(View view) {}
-
-        @Override
-        public void onAnimationCancel(View view) {}
-    };
-}

app/src/main/java/android/support/v7/widget/GridLayoutManager.java

@@ -1,816 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific languag`e governing permissions and
- * limitations under the License.
- */
-package android.support.v7.widget;
-
-import android.content.Context;
-import android.graphics.Rect;
-import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
-import android.util.AttributeSet;
-import android.util.Log;
-import android.util.SparseIntArray;
-import android.view.View;
-import android.view.ViewGroup;
-
-import java.util.Arrays;
-
-/**
- * A {@link RecyclerView.LayoutManager} implementations that lays out items in a grid.
- * <p>
- * By default, each item occupies 1 span. You can change it by providing a custom
- * {@link SpanSizeLookup} instance via {@link #setSpanSizeLookup(SpanSizeLookup)}.
- */
-public class GridLayoutManager extends LinearLayoutManager {
-
-    private static final boolean DEBUG = false;
-    private static final String TAG = "GridLayoutManager";
-    public static final int DEFAULT_SPAN_COUNT = -1;
-    /**
-     * The measure spec for the scroll direction.
-     */
-    static final int MAIN_DIR_SPEC =
-            View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
-
-    int mSpanCount = DEFAULT_SPAN_COUNT;
-    /**
-     * The size of each span
-     */
-    int mSizePerSpan;
-    /**
-     * Temporary array to keep views in layoutChunk method
-     */
-    View[] mSet;
-    final SparseIntArray mPreLayoutSpanSizeCache = new SparseIntArray();
-    final SparseIntArray mPreLayoutSpanIndexCache = new SparseIntArray();
-    SpanSizeLookup mSpanSizeLookup = new DefaultSpanSizeLookup();
-    // re-used variable to acquire decor insets from RecyclerView
-    final Rect mDecorInsets = new Rect();
-
-    /**
-     * Creates a vertical GridLayoutManager
-     *
-     * @param context Current context, will be used to access resources.
-     * @param spanCount The number of columns in the grid
-     */
-    public GridLayoutManager(Context context, int spanCount) {
-        super(context);
-        setSpanCount(spanCount);
-    }
-
-    /**
-     * @param context Current context, will be used to access resources.
-     * @param spanCount The number of columns or rows in the grid
-     * @param orientation Layout orientation. Should be {@link #HORIZONTAL} or {@link
-     *                      #VERTICAL}.
-     * @param reverseLayout When set to true, layouts from end to start.
-     */
-    public GridLayoutManager(Context context, int spanCount, int orientation,
-            boolean reverseLayout) {
-        super(context, orientation, reverseLayout);
-        setSpanCount(spanCount);
-    }
-
-    /**
-     * stackFromEnd is not supported by GridLayoutManager. Consider using
-     * {@link #setReverseLayout(boolean)}.
-     */
-    @Override
-    public void setStackFromEnd(boolean stackFromEnd) {
-        if (stackFromEnd) {
-            throw new UnsupportedOperationException(
-                    "GridLayoutManager does not support stack from end."
-                            + " Consider using reverse layout");
-        }
-        super.setStackFromEnd(false);
-    }
-
-    @Override
-    public int getRowCountForAccessibility(RecyclerView.Recycler recycler,
-            RecyclerView.State state) {
-        if (mOrientation == HORIZONTAL) {
-            return mSpanCount;
-        }
-        if (state.getItemCount() < 1) {
-            return 0;
-        }
-        return getSpanGroupIndex(recycler, state, state.getItemCount() - 1);
-    }
-
-    @Override
-    public int getColumnCountForAccessibility(RecyclerView.Recycler recycler,
-            RecyclerView.State state) {
-        if (mOrientation == VERTICAL) {
-            return mSpanCount;
-        }
-        if (state.getItemCount() < 1) {
-            return 0;
-        }
-        return getSpanGroupIndex(recycler, state, state.getItemCount() - 1);
-    }
-
-    @Override
-    public void onInitializeAccessibilityNodeInfoForItem(RecyclerView.Recycler recycler,
-            RecyclerView.State state, View host, AccessibilityNodeInfoCompat info) {
-        ViewGroup.LayoutParams lp = host.getLayoutParams();
-        if (!(lp instanceof LayoutParams)) {
-            super.onInitializeAccessibilityNodeInfoForItem(host, info);
-            return;
-        }
-        LayoutParams glp = (LayoutParams) lp;
-        int spanGroupIndex = getSpanGroupIndex(recycler, state, glp.getViewPosition());
-        if (mOrientation == HORIZONTAL) {
-            info.setCollectionItemInfo(AccessibilityNodeInfoCompat.CollectionItemInfoCompat.obtain(
-                    glp.getSpanIndex(), glp.getSpanSize(),
-                    spanGroupIndex, 1,
-                    mSpanCount > 1 && glp.getSpanSize() == mSpanCount, false));
-        } else { // VERTICAL
-            info.setCollectionItemInfo(AccessibilityNodeInfoCompat.CollectionItemInfoCompat.obtain(
-                    spanGroupIndex , 1,
-                    glp.getSpanIndex(), glp.getSpanSize(),
-                    mSpanCount > 1 && glp.getSpanSize() == mSpanCount, false));
-        }
-    }
-
-    @Override
-    public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
-        if (state.isPreLayout()) {
-            cachePreLayoutSpanMapping();
-        }
-        super.onLayoutChildren(recycler, state);
-        if (DEBUG) {
-            validateChildOrder();
-        }
-        clearPreLayoutSpanMappingCache();
-    }
-
-    private void clearPreLayoutSpanMappingCache() {
-        mPreLayoutSpanSizeCache.clear();
-        mPreLayoutSpanIndexCache.clear();
-    }
-
-    private void cachePreLayoutSpanMapping() {
-        final int childCount = getChildCount();
-        for (int i = 0; i < childCount; i++) {
-            final LayoutParams lp = (LayoutParams) getChildAt(i).getLayoutParams();
-            final int viewPosition = lp.getViewPosition();
-            mPreLayoutSpanSizeCache.put(viewPosition, lp.getSpanSize());
-            mPreLayoutSpanIndexCache.put(viewPosition, lp.getSpanIndex());
-        }
-    }
-
-    @Override
-    public void onItemsAdded(RecyclerView recyclerView, int positionStart, int itemCount) {
-        mSpanSizeLookup.invalidateSpanIndexCache();
-    }
-
-    @Override
-    public void onItemsChanged(RecyclerView recyclerView) {
-        mSpanSizeLookup.invalidateSpanIndexCache();
-    }
-
-    @Override
-    public void onItemsRemoved(RecyclerView recyclerView, int positionStart, int itemCount) {
-        mSpanSizeLookup.invalidateSpanIndexCache();
-    }
-
-    @Override
-    public void onItemsUpdated(RecyclerView recyclerView, int positionStart, int itemCount) {
-        mSpanSizeLookup.invalidateSpanIndexCache();
-    }
-
-    @Override
-    public void onItemsMoved(RecyclerView recyclerView, int from, int to, int itemCount) {
-        mSpanSizeLookup.invalidateSpanIndexCache();
-    }
-
-    @Override
-    public RecyclerView.LayoutParams generateDefaultLayoutParams() {
-        return new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
-                ViewGroup.LayoutParams.WRAP_CONTENT);
-    }
-
-    @Override
-    public RecyclerView.LayoutParams generateLayoutParams(Context c, AttributeSet attrs) {
-        return new LayoutParams(c, attrs);
-    }
-
-    @Override
-    public RecyclerView.LayoutParams generateLayoutParams(ViewGroup.LayoutParams lp) {
-        if (lp instanceof ViewGroup.MarginLayoutParams) {
-            return new LayoutParams((ViewGroup.MarginLayoutParams) lp);
-        } else {
-            return new LayoutParams(lp);
-        }
-    }
-
-    @Override
-    public boolean checkLayoutParams(RecyclerView.LayoutParams lp) {
-        return lp instanceof LayoutParams;
-    }
-
-    /**
-     * Sets the source to get the number of spans occupied by each item in the adapter.
-     *
-     * @param spanSizeLookup {@link SpanSizeLookup} instance to be used to query number of spans
-     *                       occupied by each item
-     */
-    public void setSpanSizeLookup(SpanSizeLookup spanSizeLookup) {
-        mSpanSizeLookup = spanSizeLookup;
-    }
-
-    /**
-     * Returns the current {@link SpanSizeLookup} used by the GridLayoutManager.
-     *
-     * @return The current {@link SpanSizeLookup} used by the GridLayoutManager.
-     */
-    public SpanSizeLookup getSpanSizeLookup() {
-        return mSpanSizeLookup;
-    }
-
-    private void updateMeasurements() {
-        int totalSpace;
-        if (getOrientation() == VERTICAL) {
-            totalSpace = getWidth() - getPaddingRight() - getPaddingLeft();
-        } else {
-            totalSpace = getHeight() - getPaddingBottom() - getPaddingTop();
-        }
-        mSizePerSpan = totalSpace / mSpanCount;
-    }
-
-    @Override
-    void onAnchorReady(RecyclerView.State state, AnchorInfo anchorInfo) {
-        super.onAnchorReady(state, anchorInfo);
-        updateMeasurements();
-        if (state.getItemCount() > 0 && !state.isPreLayout()) {
-            ensureAnchorIsInFirstSpan(anchorInfo);
-        }
-        if (mSet == null || mSet.length != mSpanCount) {
-            mSet = new View[mSpanCount];
-        }
-    }
-
-    private void ensureAnchorIsInFirstSpan(AnchorInfo anchorInfo) {
-        int span = mSpanSizeLookup.getCachedSpanIndex(anchorInfo.mPosition, mSpanCount);
-        while (span > 0 && anchorInfo.mPosition > 0) {
-            anchorInfo.mPosition--;
-            span = mSpanSizeLookup.getCachedSpanIndex(anchorInfo.mPosition, mSpanCount);
-        }
-    }
-
-    private int getSpanGroupIndex(RecyclerView.Recycler recycler, RecyclerView.State state,
-            int viewPosition) {
-        if (!state.isPreLayout()) {
-            return mSpanSizeLookup.getSpanGroupIndex(viewPosition, mSpanCount);
-        }
-        final int adapterPosition = recycler.convertPreLayoutPositionToPostLayout(viewPosition);
-        if (adapterPosition == -1) {
-            if (DEBUG) {
-                throw new RuntimeException("Cannot find span group index for position "
-                        + viewPosition);
-            }
-            Log.w(TAG, "Cannot find span size for pre layout position. " + viewPosition);
-            return 0;
-        }
-        return mSpanSizeLookup.getSpanGroupIndex(adapterPosition, mSpanCount);
-    }
-
-    private int getSpanIndex(RecyclerView.Recycler recycler, RecyclerView.State state, int pos) {
-        if (!state.isPreLayout()) {
-            return mSpanSizeLookup.getCachedSpanIndex(pos, mSpanCount);
-        }
-        final int cached = mPreLayoutSpanIndexCache.get(pos, -1);
-        if (cached != -1) {
-            return cached;
-        }
-        final int adapterPosition = recycler.convertPreLayoutPositionToPostLayout(pos);
-        if (adapterPosition == -1) {
-            if (DEBUG) {
-                throw new RuntimeException("Cannot find span index for pre layout position. It is"
-                        + " not cached, not in the adapter. Pos:" + pos);
-            }
-            Log.w(TAG, "Cannot find span size for pre layout position. It is"
-                    + " not cached, not in the adapter. Pos:" + pos);
-            return 0;
-        }
-        return mSpanSizeLookup.getCachedSpanIndex(adapterPosition, mSpanCount);
-    }
-
-    private int getSpanSize(RecyclerView.Recycler recycler, RecyclerView.State state, int pos) {
-        if (!state.isPreLayout()) {
-            return mSpanSizeLookup.getSpanSize(pos);
-        }
-        final int cached = mPreLayoutSpanSizeCache.get(pos, -1);
-        if (cached != -1) {
-            return cached;
-        }
-        final int adapterPosition = recycler.convertPreLayoutPositionToPostLayout(pos);
-        if (adapterPosition == -1) {
-            if (DEBUG) {
-                throw new RuntimeException("Cannot find span size for pre layout position. It is"
-                        + " not cached, not in the adapter. Pos:" + pos);
-            }
-            Log.w(TAG, "Cannot find span size for pre layout position. It is"
-                    + " not cached, not in the adapter. Pos:" + pos);
-            return 1;
-        }
-        return mSpanSizeLookup.getSpanSize(adapterPosition);
-    }
-
-    @Override
-    void layoutChunk(RecyclerView.Recycler recycler, RecyclerView.State state,
-            LayoutState layoutState, LayoutChunkResult result) {
-        final boolean layingOutInPrimaryDirection =
-                layoutState.mItemDirection == LayoutState.ITEM_DIRECTION_TAIL;
-        int count = 0;
-        int consumedSpanCount = 0;
-        int remainingSpan = mSpanCount;
-        if (!layingOutInPrimaryDirection) {
-            int itemSpanIndex = getSpanIndex(recycler, state, layoutState.mCurrentPosition);
-            int itemSpanSize = getSpanSize(recycler, state, layoutState.mCurrentPosition);
-            remainingSpan = itemSpanIndex + itemSpanSize;
-        }
-        while (count < mSpanCount && layoutState.hasMore(state) && remainingSpan > 0) {
-            int pos = layoutState.mCurrentPosition;
-            final int spanSize = getSpanSize(recycler, state, pos);
-            if (spanSize > mSpanCount) {
-                throw new IllegalArgumentException("Item at position " + pos + " requires " +
-                        spanSize + " spans but GridLayoutManager has only " + mSpanCount
-                        + " spans.");
-            }
-            remainingSpan -= spanSize;
-            if (remainingSpan < 0) {
-                break; // item did not fit into this row or column
-            }
-            View view = layoutState.next(recycler);
-            if (view == null) {
-                break;
-            }
-            consumedSpanCount += spanSize;
-            mSet[count] = view;
-            count++;
-        }
-
-        if (count == 0) {
-            result.mFinished = true;
-            return;
-        }
-
-        int maxSize = 0;
-
-        // we should assign spans before item decor offsets are calculated
-        assignSpans(recycler, state, count, consumedSpanCount, layingOutInPrimaryDirection);
-        for (int i = 0; i < count; i++) {
-            View view = mSet[i];
-            if (layoutState.mScrapList == null) {
-                if (layingOutInPrimaryDirection) {
-                    addView(view);
-                } else {
-                    addView(view, 0);
-                }
-            } else {
-                if (layingOutInPrimaryDirection) {
-                    addDisappearingView(view);
-                } else {
-                    addDisappearingView(view, 0);
-                }
-            }
-
-            int spanSize = getSpanSize(recycler, state, getPosition(view));
-            final int spec = View.MeasureSpec.makeMeasureSpec(mSizePerSpan * spanSize,
-                    View.MeasureSpec.EXACTLY);
-            final LayoutParams lp = (LayoutParams) view.getLayoutParams();
-            if (mOrientation == VERTICAL) {
-                measureChildWithDecorationsAndMargin(view, spec, getMainDirSpec(lp.height));
-            } else {
-                measureChildWithDecorationsAndMargin(view, getMainDirSpec(lp.width), spec);
-            }
-            final int size = mOrientationHelper.getDecoratedMeasurement(view);
-            if (size > maxSize) {
-                maxSize = size;
-            }
-        }
-
-        // views that did not measure the maxSize has to be re-measured
-        final int maxMeasureSpec = getMainDirSpec(maxSize);
-        for (int i = 0; i < count; i ++) {
-            final View view = mSet[i];
-            if (mOrientationHelper.getDecoratedMeasurement(view) != maxSize) {
-                int spanSize = getSpanSize(recycler, state, getPosition(view));
-                final int spec = View.MeasureSpec.makeMeasureSpec(mSizePerSpan * spanSize,
-                        View.MeasureSpec.EXACTLY);
-                if (mOrientation == VERTICAL) {
-                    measureChildWithDecorationsAndMargin(view, spec, maxMeasureSpec);
-                } else {
-                    measureChildWithDecorationsAndMargin(view, maxMeasureSpec, spec);
-                }
-            }
-        }
-
-        result.mConsumed = maxSize;
-
-        int left = 0, right = 0, top = 0, bottom = 0;
-        if (mOrientation == VERTICAL) {
-            if (layoutState.mLayoutDirection == LayoutState.LAYOUT_START) {
-                bottom = layoutState.mOffset;
-                top = bottom - maxSize;
-            } else {
-                top = layoutState.mOffset;
-                bottom = top + maxSize;
-            }
-        } else {
-            if (layoutState.mLayoutDirection == LayoutState.LAYOUT_START) {
-                right = layoutState.mOffset;
-                left = right - maxSize;
-            } else {
-                left = layoutState.mOffset;
-                right = left + maxSize;
-            }
-        }
-        for (int i = 0; i < count; i++) {
-            View view = mSet[i];
-            LayoutParams params = (LayoutParams) view.getLayoutParams();
-            if (mOrientation == VERTICAL) {
-                left = getPaddingLeft() + mSizePerSpan * params.mSpanIndex;
-                right = left + mOrientationHelper.getDecoratedMeasurementInOther(view);
-            } else {
-                top = getPaddingTop() + mSizePerSpan * params.mSpanIndex;
-                bottom = top + mOrientationHelper.getDecoratedMeasurementInOther(view);
-            }
-            // We calculate everything with View's bounding box (which includes decor and margins)
-            // To calculate correct layout position, we subtract margins.
-            layoutDecorated(view, left + params.leftMargin, top + params.topMargin,
-                    right - params.rightMargin, bottom - params.bottomMargin);
-            if (DEBUG) {
-                Log.d(TAG, "laid out child at position " + getPosition(view) + ", with l:"
-                        + (left + params.leftMargin) + ", t:" + (top + params.topMargin) + ", r:"
-                        + (right - params.rightMargin) + ", b:" + (bottom - params.bottomMargin)
-                        + ", span:" + params.mSpanIndex + ", spanSize:" + params.mSpanSize);
-            }
-            // Consume the available space if the view is not removed OR changed
-            if (params.isItemRemoved() || params.isItemChanged()) {
-                result.mIgnoreConsumed = true;
-            }
-            result.mFocusable |= view.isFocusable();
-        }
-        Arrays.fill(mSet, null);
-    }
-
-    private int getMainDirSpec(int dim) {
-        if (dim < 0) {
-            return MAIN_DIR_SPEC;
-        } else {
-            return View.MeasureSpec.makeMeasureSpec(dim, View.MeasureSpec.EXACTLY);
-        }
-    }
-
-    private void measureChildWithDecorationsAndMargin(View child, int widthSpec, int heightSpec) {
-        calculateItemDecorationsForChild(child, mDecorInsets);
-        RecyclerView.LayoutParams lp = (RecyclerView.LayoutParams) child.getLayoutParams();
-        widthSpec = updateSpecWithExtra(widthSpec, lp.leftMargin + mDecorInsets.left,
-                lp.rightMargin + mDecorInsets.right);
-        heightSpec = updateSpecWithExtra(heightSpec, lp.topMargin + mDecorInsets.top,
-                lp.bottomMargin + mDecorInsets.bottom);
-        child.measure(widthSpec, heightSpec);
-    }
-
-    private int updateSpecWithExtra(int spec, int startInset, int endInset) {
-        if (startInset == 0 && endInset == 0) {
-            return spec;
-        }
-        final int mode = View.MeasureSpec.getMode(spec);
-        if (mode == View.MeasureSpec.AT_MOST || mode == View.MeasureSpec.EXACTLY) {
-            return View.MeasureSpec.makeMeasureSpec(
-                    View.MeasureSpec.getSize(spec) - startInset - endInset, mode);
-        }
-        return spec;
-    }
-
-    private void assignSpans(RecyclerView.Recycler recycler, RecyclerView.State state, int count,
-            int consumedSpanCount, boolean layingOutInPrimaryDirection) {
-        int span, spanDiff, start, end, diff;
-        // make sure we traverse from min position to max position
-        if (layingOutInPrimaryDirection) {
-            start = 0;
-            end = count;
-            diff = 1;
-        } else {
-            start = count - 1;
-            end = -1;
-            diff = -1;
-        }
-        if (mOrientation == VERTICAL && isLayoutRTL()) { // start from last span
-            span = consumedSpanCount - 1;
-            spanDiff = -1;
-        } else {
-            span = 0;
-            spanDiff = 1;
-        }
-        for (int i = start; i != end; i += diff) {
-            View view = mSet[i];
-            LayoutParams params = (LayoutParams) view.getLayoutParams();
-            params.mSpanSize = getSpanSize(recycler, state, getPosition(view));
-            if (spanDiff == -1 && params.mSpanSize > 1) {
-                params.mSpanIndex = span - (params.mSpanSize - 1);
-            } else {
-                params.mSpanIndex = span;
-            }
-            span += spanDiff * params.mSpanSize;
-        }
-    }
-
-    /**
-     * Returns the number of spans laid out by this grid.
-     *
-     * @return The number of spans
-     * @see #setSpanCount(int)
-     */
-    public int getSpanCount() {
-        return mSpanCount;
-    }
-
-    /**
-     * Sets the number of spans to be laid out.
-     * <p>
-     * If {@link #getOrientation()} is {@link #VERTICAL}, this is the number of columns.
-     * If {@link #getOrientation()} is {@link #HORIZONTAL}, this is the number of rows.
-     *
-     * @param spanCount The total number of spans in the grid
-     * @see #getSpanCount()
-     */
-    public void setSpanCount(int spanCount) {
-        if (spanCount == mSpanCount) {
-            return;
-        }
-        if (spanCount < 1) {
-            throw new IllegalArgumentException("Span count should be at least 1. Provided "
-                    + spanCount);
-        }
-        mSpanCount = spanCount;
-        mSpanSizeLookup.invalidateSpanIndexCache();
-    }
-
-    /**
-     * A helper class to provide the number of spans each item occupies.
-     * <p>
-     * Default implementation sets each item to occupy exactly 1 span.
-     *
-     * @see GridLayoutManager#setSpanSizeLookup(SpanSizeLookup)
-     */
-    public static abstract class SpanSizeLookup {
-
-        final SparseIntArray mSpanIndexCache = new SparseIntArray();
-
-        private boolean mCacheSpanIndices = false;
-
-        /**
-         * Returns the number of span occupied by the item at <code>position</code>.
-         *
-         * @param position The adapter position of the item
-         * @return The number of spans occupied by the item at the provided position
-         */
-        abstract public int getSpanSize(int position);
-
-        /**
-         * Sets whether the results of {@link #getSpanIndex(int, int)} method should be cached or
-         * not. By default these values are not cached. If you are not overriding
-         * {@link #getSpanIndex(int, int)}, you should set this to true for better performance.
-         *
-         * @param cacheSpanIndices Whether results of getSpanIndex should be cached or not.
-         */
-        public void setSpanIndexCacheEnabled(boolean cacheSpanIndices) {
-            mCacheSpanIndices = cacheSpanIndices;
-        }
-
-        /**
-         * Clears the span index cache. GridLayoutManager automatically calls this method when
-         * adapter changes occur.
-         */
-        public void invalidateSpanIndexCache() {
-            mSpanIndexCache.clear();
-        }
-
-        /**
-         * Returns whether results of {@link #getSpanIndex(int, int)} method are cached or not.
-         *
-         * @return True if results of {@link #getSpanIndex(int, int)} are cached.
-         */
-        public boolean isSpanIndexCacheEnabled() {
-            return mCacheSpanIndices;
-        }
-
-        int getCachedSpanIndex(int position, int spanCount) {
-            if (!mCacheSpanIndices) {
-                return getSpanIndex(position, spanCount);
-            }
-            final int existing = mSpanIndexCache.get(position, -1);
-            if (existing != -1) {
-                return existing;
-            }
-            final int value = getSpanIndex(position, spanCount);
-            mSpanIndexCache.put(position, value);
-            return value;
-        }
-
-        /**
-         * Returns the final span index of the provided position.
-         * <p>
-         * If you have a faster way to calculate span index for your items, you should override
-         * this method. Otherwise, you should enable span index cache
-         * ({@link #setSpanIndexCacheEnabled(boolean)}) for better performance. When caching is
-         * disabled, default implementation traverses all items from 0 to
-         * <code>position</code>. When caching is enabled, it calculates from the closest cached
-         * value before the <code>position</code>.
-         * <p>
-         * If you override this method, you need to make sure it is consistent with
-         * {@link #getSpanSize(int)}. GridLayoutManager does not call this method for
-         * each item. It is called only for the reference item and rest of the items
-         * are assigned to spans based on the reference item. For example, you cannot assign a
-         * position to span 2 while span 1 is empty.
-         * <p>
-         * Note that span offsets always start with 0 and are not affected by RTL.
-         *
-         * @param position  The position of the item
-         * @param spanCount The total number of spans in the grid
-         * @return The final span position of the item. Should be between 0 (inclusive) and
-         * <code>spanCount</code>(exclusive)
-         */
-        public int getSpanIndex(int position, int spanCount) {
-            int positionSpanSize = getSpanSize(position);
-            if (positionSpanSize == spanCount) {
-                return 0; // quick return for full-span items
-            }
-            int span = 0;
-            int startPos = 0;
-            // If caching is enabled, try to jump
-            if (mCacheSpanIndices && mSpanIndexCache.size() > 0) {
-                int prevKey = findReferenceIndexFromCache(position);
-                if (prevKey >= 0) {
-                    span = mSpanIndexCache.get(prevKey) + getSpanSize(prevKey);
-                    startPos = prevKey + 1;
-                }
-            }
-            for (int i = startPos; i < position; i++) {
-                int size = getSpanSize(i);
-                span += size;
-                if (span == spanCount) {
-                    span = 0;
-                } else if (span > spanCount) {
-                    // did not fit, moving to next row / column
-                    span = size;
-                }
-            }
-            if (span + positionSpanSize <= spanCount) {
-                return span;
-            }
-            return 0;
-        }
-
-        int findReferenceIndexFromCache(int position) {
-            int lo = 0;
-            int hi = mSpanIndexCache.size() - 1;
-
-            while (lo <= hi) {
-                final int mid = (lo + hi) >>> 1;
-                final int midVal = mSpanIndexCache.keyAt(mid);
-                if (midVal < position) {
-                    lo = mid + 1;
-                } else {
-                    hi = mid - 1;
-                }
-            }
-            int index = lo - 1;
-            if (index >= 0 && index < mSpanIndexCache.size()) {
-                return mSpanIndexCache.keyAt(index);
-            }
-            return -1;
-        }
-
-        /**
-         * Returns the index of the group this position belongs.
-         * <p>
-         * For example, if grid has 3 columns and each item occupies 1 span, span group index
-         * for item 1 will be 0, item 5 will be 1.
-         *
-         * @param adapterPosition The position in adapter
-         * @param spanCount The total number of spans in the grid
-         * @return The index of the span group including the item at the given adapter position
-         */
-        public int getSpanGroupIndex(int adapterPosition, int spanCount) {
-            int span = 0;
-            int group = 0;
-            int positionSpanSize = getSpanSize(adapterPosition);
-            for (int i = 0; i < adapterPosition; i++) {
-                int size = getSpanSize(i);
-                span += size;
-                if (span == spanCount) {
-                    span = 0;
-                    group++;
-                } else if (span > spanCount) {
-                    // did not fit, moving to next row / column
-                    span = size;
-                    group++;
-                }
-            }
-            if (span + positionSpanSize > spanCount) {
-                group++;
-            }
-            return group;
-        }
-    }
-
-    @Override
-    public boolean supportsPredictiveItemAnimations() {
-        return mPendingSavedState == null;
-    }
-
-    /**
-     * Default implementation for {@link SpanSizeLookup}. Each item occupies 1 span.
-     */
-    public static final class DefaultSpanSizeLookup extends SpanSizeLookup {
-
-        @Override
-        public int getSpanSize(int position) {
-            return 1;
-        }
-
-        @Override
-        public int getSpanIndex(int position, int spanCount) {
-            return position % spanCount;
-        }
-    }
-
-    /**
-     * LayoutParams used by GridLayoutManager.
-     */
-    public static class LayoutParams extends RecyclerView.LayoutParams {
-
-        /**
-         * Span Id for Views that are not laid out yet.
-         */
-        public static final int INVALID_SPAN_ID = -1;
-
-        private int mSpanIndex = INVALID_SPAN_ID;
-
-        private int mSpanSize = 0;
-
-        public LayoutParams(Context c, AttributeSet attrs) {
-            super(c, attrs);
-        }
-
-        public LayoutParams(int width, int height) {
-            super(width, height);
-        }
-
-        public LayoutParams(ViewGroup.MarginLayoutParams source) {
-            super(source);
-        }
-
-        public LayoutParams(ViewGroup.LayoutParams source) {
-            super(source);
-        }
-
-        public LayoutParams(RecyclerView.LayoutParams source) {
-            super(source);
-        }
-
-        /**
-         * Returns the current span index of this View. If the View is not laid out yet, the return
-         * value is <code>undefined</code>.
-         * <p>
-         * Note that span index may change by whether the RecyclerView is RTL or not. For
-         * example, if the number of spans is 3 and layout is RTL, the rightmost item will have
-         * span index of 2. If the layout changes back to LTR, span index for this view will be 0.
-         * If the item was occupying 2 spans, span indices would be 1 and 0 respectively.
-         * <p>
-         * If the View occupies multiple spans, span with the minimum index is returned.
-         *
-         * @return The span index of the View.
-         */
-        public int getSpanIndex() {
-            return mSpanIndex;
-        }
-
-        /**
-         * Returns the number of spans occupied by this View. If the View not laid out yet, the
-         * return value is <code>undefined</code>.
-         *
-         * @return The number of spans occupied by this View.
-         */
-        public int getSpanSize() {
-            return mSpanSize;
-        }
-    }
-
-}

app/src/main/java/android/support/v7/widget/LayoutState.java

@@ -1,87 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific languag`e governing permissions and
- * limitations under the License.
- */
-
-package android.support.v7.widget;
-import android.view.View;
-
-/**
- * Helper class that keeps temporary state while {LayoutManager} is filling out the empty
- * space.
- */
-class LayoutState {
-
-    final static String TAG = "LayoutState";
-
-    final static int LAYOUT_START = -1;
-
-    final static int LAYOUT_END = 1;
-
-    final static int INVALID_LAYOUT = Integer.MIN_VALUE;
-
-    final static int ITEM_DIRECTION_HEAD = -1;
-
-    final static int ITEM_DIRECTION_TAIL = 1;
-
-    final static int SCOLLING_OFFSET_NaN = Integer.MIN_VALUE;
-
-    /**
-     * Number of pixels that we should fill, in the layout direction.
-     */
-    int mAvailable;
-
-    /**
-     * Current position on the adapter to get the next item.
-     */
-    int mCurrentPosition;
-
-    /**
-     * Defines the direction in which the data adapter is traversed.
-     * Should be {@link #ITEM_DIRECTION_HEAD} or {@link #ITEM_DIRECTION_TAIL}
-     */
-    int mItemDirection;
-
-    /**
-     * Defines the direction in which the layout is filled.
-     * Should be {@link #LAYOUT_START} or {@link #LAYOUT_END}
-     */
-    int mLayoutDirection;
-
-    /**
-     * Used if you want to pre-layout items that are not yet visible.
-     * The difference with {@link #mAvailable} is that, when recycling, distance rendered for
-     * {@link #mExtra} is not considered not to recycle visible children.
-     */
-    int mExtra = 0;
-
-    /**
-     * @return true if there are more items in the data adapter
-     */
-    boolean hasMore(RecyclerView.State state) {
-        return mCurrentPosition >= 0 && mCurrentPosition < state.getItemCount();
-    }
-
-    /**
-     * Gets the view for the next element that we should render.
-     * Also updates current item index to the next item, based on {@link #mItemDirection}
-     *
-     * @return The next element that we should render.
-     */
-    View next(RecyclerView.Recycler recycler) {
-        final View view = recycler.getViewForPosition(mCurrentPosition);
-        mCurrentPosition += mItemDirection;
-        return view;
-    }
-}

app/src/main/java/android/support/v7/widget/LinearSmoothScroller.java

@@ -1,338 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.support.v7.widget;
-
-import android.content.Context;
-import android.graphics.PointF;
-import android.util.DisplayMetrics;
-import android.util.Log;
-import android.view.View;
-import android.view.animation.DecelerateInterpolator;
-import android.view.animation.LinearInterpolator;
-
-/**
- * {@link RecyclerView.SmoothScroller} implementation which uses
- * {@link LinearInterpolator} until the target position becames a child of
- * the RecyclerView and then uses
- * {@link DecelerateInterpolator} to slowly approach to target position.
- */
-abstract public class LinearSmoothScroller extends RecyclerView.SmoothScroller {
-
-    private static final String TAG = "LinearSmoothScroller";
-
-    private static final boolean DEBUG = false;
-
-    private static final float MILLISECONDS_PER_INCH = 25f;
-
-    private static final int TARGET_SEEK_SCROLL_DISTANCE_PX = 10000;
-
-    /**
-     * Align child view's left or top with parent view's left or top
-     *
-     * @see #calculateDtToFit(int, int, int, int, int)
-     * @see #calculateDxToMakeVisible(View, int)
-     * @see #calculateDyToMakeVisible(View, int)
-     */
-    public static final int SNAP_TO_START = -1;
-
-    /**
-     * Align child view's right or bottom with parent view's right or bottom
-     *
-     * @see #calculateDtToFit(int, int, int, int, int)
-     * @see #calculateDxToMakeVisible(View, int)
-     * @see #calculateDyToMakeVisible(View, int)
-     */
-    public static final int SNAP_TO_END = 1;
-
-    /**
-     * <p>Decides if the child should be snapped from start or end, depending on where it
-     * currently is in relation to its parent.</p>
-     * <p>For instance, if the view is virtually on the left of RecyclerView, using
-     * {@code SNAP_TO_ANY} is the same as using {@code SNAP_TO_START}</p>
-     *
-     * @see #calculateDtToFit(int, int, int, int, int)
-     * @see #calculateDxToMakeVisible(View, int)
-     * @see #calculateDyToMakeVisible(View, int)
-     */
-    public static final int SNAP_TO_ANY = 0;
-
-    // Trigger a scroll to a further distance than TARGET_SEEK_SCROLL_DISTANCE_PX so that if target
-    // view is not laid out until interim target position is reached, we can detect the case before
-    // scrolling slows down and reschedule another interim target scroll
-    private static final float TARGET_SEEK_EXTRA_SCROLL_RATIO = 1.2f;
-
-    protected final LinearInterpolator mLinearInterpolator = new LinearInterpolator();
-
-    protected final DecelerateInterpolator mDecelerateInterpolator = new DecelerateInterpolator();
-
-    protected PointF mTargetVector;
-
-    private final float MILLISECONDS_PER_PX;
-
-    // Temporary variables to keep track of the interim scroll target. These values do not
-    // point to a real item position, rather point to an estimated location pixels.
-    protected int mInterimTargetDx = 0, mInterimTargetDy = 0;
-
-    public LinearSmoothScroller(Context context) {
-        MILLISECONDS_PER_PX = calculateSpeedPerPixel(context.getResources().getDisplayMetrics());
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    protected void onStart() {
-
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    protected void onTargetFound(View targetView, RecyclerView.State state, Action action) {
-        final int dx = calculateDxToMakeVisible(targetView, getHorizontalSnapPreference());
-        final int dy = calculateDyToMakeVisible(targetView, getVerticalSnapPreference());
-        final int distance = (int) Math.sqrt(dx * dx + dy * dy);
-        final int time = calculateTimeForDeceleration(distance);
-        if (time > 0) {
-            action.update(-dx, -dy, time, mDecelerateInterpolator);
-        }
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    protected void onSeekTargetStep(int dx, int dy, RecyclerView.State state, Action action) {
-        if (getChildCount() == 0) {
-            stop();
-            return;
-        }
-        if (DEBUG && mTargetVector != null
-                && ((mTargetVector.x * dx < 0 || mTargetVector.y * dy < 0))) {
-            throw new IllegalStateException("Scroll happened in the opposite direction"
-                    + " of the target. Some calculations are wrong");
-        }
-        mInterimTargetDx = clampApplyScroll(mInterimTargetDx, dx);
-        mInterimTargetDy = clampApplyScroll(mInterimTargetDy, dy);
-
-        if (mInterimTargetDx == 0 && mInterimTargetDy == 0) {
-            updateActionForInterimTarget(action);
-        } // everything is valid, keep going
-
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    protected void onStop() {
-        mInterimTargetDx = mInterimTargetDy = 0;
-        mTargetVector = null;
-    }
-
-    /**
-     * Calculates the scroll speed.
-     *
-     * @param displayMetrics DisplayMetrics to be used for real dimension calculations
-     * @return The time (in ms) it should take for each pixel. For instance, if returned value is
-     * 2 ms, it means scrolling 1000 pixels with LinearInterpolation should take 2 seconds.
-     */
-    protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
-        return MILLISECONDS_PER_INCH / displayMetrics.densityDpi;
-    }
-
-    /**
-     * <p>Calculates the time for deceleration so that transition from LinearInterpolator to
-     * DecelerateInterpolator looks smooth.</p>
-     *
-     * @param dx Distance to scroll
-     * @return Time for DecelerateInterpolator to smoothly traverse the distance when transitioning
-     * from LinearInterpolation
-     */
-    protected int calculateTimeForDeceleration(int dx) {
-        // we want to cover same area with the linear interpolator for the first 10% of the
-        // interpolation. After that, deceleration will take control.
-        // area under curve (1-(1-x)^2) can be calculated as (1 - x/3) * x * x
-        // which gives 0.100028 when x = .3356
-        // this is why we divide linear scrolling time with .3356
-        return  (int) Math.ceil(calculateTimeForScrolling(dx) / .3356);
-    }
-
-    /**
-     * Calculates the time it should take to scroll the given distance (in pixels)
-     *
-     * @param dx Distance in pixels that we want to scroll
-     * @return Time in milliseconds
-     * @see #calculateSpeedPerPixel(DisplayMetrics)
-     */
-    protected int calculateTimeForScrolling(int dx) {
-        // In a case where dx is very small, rounding may return 0 although dx > 0.
-        // To avoid that issue, ceil the result so that if dx > 0, we'll always return positive
-        // time.
-        return (int) Math.ceil(Math.abs(dx) * MILLISECONDS_PER_PX);
-    }
-
-    /**
-     * When scrolling towards a child view, this method defines whether we should align the left
-     * or the right edge of the child with the parent RecyclerView.
-     *
-     * @return SNAP_TO_START, SNAP_TO_END or SNAP_TO_ANY; depending on the current target vector
-     * @see #SNAP_TO_START
-     * @see #SNAP_TO_END
-     * @see #SNAP_TO_ANY
-     */
-    protected int getHorizontalSnapPreference() {
-        return mTargetVector == null || mTargetVector.x == 0 ? SNAP_TO_ANY :
-                mTargetVector.x > 0 ? SNAP_TO_END : SNAP_TO_START;
-    }
-
-    /**
-     * When scrolling towards a child view, this method defines whether we should align the top
-     * or the bottom edge of the child with the parent RecyclerView.
-     *
-     * @return SNAP_TO_START, SNAP_TO_END or SNAP_TO_ANY; depending on the current target vector
-     * @see #SNAP_TO_START
-     * @see #SNAP_TO_END
-     * @see #SNAP_TO_ANY
-     */
-    protected int getVerticalSnapPreference() {
-        return mTargetVector == null || mTargetVector.y == 0 ? SNAP_TO_ANY :
-                mTargetVector.y > 0 ? SNAP_TO_END : SNAP_TO_START;
-    }
-
-    /**
-     * When the target scroll position is not a child of the RecyclerView, this method calculates
-     * a direction vector towards that child and triggers a smooth scroll.
-     *
-     * @see #computeScrollVectorForPosition(int)
-     */
-    protected void updateActionForInterimTarget(Action action) {
-        // find an interim target position
-        PointF scrollVector = computeScrollVectorForPosition(getTargetPosition());
-        if (scrollVector == null || (scrollVector.x == 0 && scrollVector.y == 0)) {
-            Log.e(TAG, "To support smooth scrolling, you should override \n"
-                    + "LayoutManager#computeScrollVectorForPosition.\n"
-                    + "Falling back to instant scroll");
-            final int target = getTargetPosition();
-            stop();
-            instantScrollToPosition(target);
-            return;
-        }
-        normalize(scrollVector);
-        mTargetVector = scrollVector;
-
-        mInterimTargetDx = (int) (TARGET_SEEK_SCROLL_DISTANCE_PX * scrollVector.x);
-        mInterimTargetDy = (int) (TARGET_SEEK_SCROLL_DISTANCE_PX * scrollVector.y);
-        final int time = calculateTimeForScrolling(TARGET_SEEK_SCROLL_DISTANCE_PX);
-        // To avoid UI hiccups, trigger a smooth scroll to a distance little further than the
-        // interim target. Since we track the distance travelled in onSeekTargetStep callback, it
-        // won't actually scroll more than what we need.
-        action.update((int) (mInterimTargetDx * TARGET_SEEK_EXTRA_SCROLL_RATIO)
-                , (int) (mInterimTargetDy * TARGET_SEEK_EXTRA_SCROLL_RATIO)
-                , (int) (time * TARGET_SEEK_EXTRA_SCROLL_RATIO), mLinearInterpolator);
-    }
-
-    private int clampApplyScroll(int tmpDt, int dt) {
-        final int before = tmpDt;
-        tmpDt -= dt;
-        if (before * tmpDt <= 0) { // changed sign, reached 0 or was 0, reset
-            return 0;
-        }
-        return tmpDt;
-    }
-
-    /**
-     * Helper method for {@link #calculateDxToMakeVisible(View, int)} and
-     * {@link #calculateDyToMakeVisible(View, int)}
-     */
-    public int calculateDtToFit(int viewStart, int viewEnd, int boxStart, int boxEnd, int
-            snapPreference) {
-        switch (snapPreference) {
-            case SNAP_TO_START:
-                return boxStart - viewStart;
-            case SNAP_TO_END:
-                return boxEnd - viewEnd;
-            case SNAP_TO_ANY:
-                final int dtStart = boxStart - viewStart;
-                if (dtStart > 0) {
-                    return dtStart;
-                }
-                final int dtEnd = boxEnd - viewEnd;
-                if (dtEnd < 0) {
-                    return dtEnd;
-                }
-                break;
-            default:
-                throw new IllegalArgumentException("snap preference should be one of the"
-                        + " constants defined in SmoothScroller, starting with SNAP_");
-        }
-        return 0;
-    }
-
-    /**
-     * Calculates the vertical scroll amount necessary to make the given view fully visible
-     * inside the RecyclerView.
-     *
-     * @param view           The view which we want to make fully visible
-     * @param snapPreference The edge which the view should snap to when entering the visible
-     *                       area. One of {@link #SNAP_TO_START}, {@link #SNAP_TO_END} or
-     *                       {@link #SNAP_TO_END}.
-     * @return The vertical scroll amount necessary to make the view visible with the given
-     * snap preference.
-     */
-    public int calculateDyToMakeVisible(View view, int snapPreference) {
-        final RecyclerView.LayoutManager layoutManager = getLayoutManager();
-        if (!layoutManager.canScrollVertically()) {
-            return 0;
-        }
-        final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                view.getLayoutParams();
-        final int top = layoutManager.getDecoratedTop(view) - params.topMargin;
-        final int bottom = layoutManager.getDecoratedBottom(view) + params.bottomMargin;
-        final int start = layoutManager.getPaddingTop();
-        final int end = layoutManager.getHeight() - layoutManager.getPaddingBottom();
-        return calculateDtToFit(top, bottom, start, end, snapPreference);
-    }
-
-    /**
-     * Calculates the horizontal scroll amount necessary to make the given view fully visible
-     * inside the RecyclerView.
-     *
-     * @param view           The view which we want to make fully visible
-     * @param snapPreference The edge which the view should snap to when entering the visible
-     *                       area. One of {@link #SNAP_TO_START}, {@link #SNAP_TO_END} or
-     *                       {@link #SNAP_TO_END}
-     * @return The vertical scroll amount necessary to make the view visible with the given
-     * snap preference.
-     */
-    public int calculateDxToMakeVisible(View view, int snapPreference) {
-        final RecyclerView.LayoutManager layoutManager = getLayoutManager();
-        if (!layoutManager.canScrollHorizontally()) {
-            return 0;
-        }
-        final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                view.getLayoutParams();
-        final int left = layoutManager.getDecoratedLeft(view) - params.leftMargin;
-        final int right = layoutManager.getDecoratedRight(view) + params.rightMargin;
-        final int start = layoutManager.getPaddingLeft();
-        final int end = layoutManager.getWidth() - layoutManager.getPaddingRight();
-        return calculateDtToFit(left, right, start, end, snapPreference);
-    }
-
-    abstract public PointF computeScrollVectorForPosition(int targetPosition);
-}

app/src/main/java/android/support/v7/widget/OpReorderer.java

@@ -1,238 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.support.v7.widget;
-
-import android.support.v7.widget.AdapterHelper.UpdateOp;
-
-import java.util.List;
-
-import static android.support.v7.widget.AdapterHelper.UpdateOp.ADD;
-import static android.support.v7.widget.AdapterHelper.UpdateOp.MOVE;
-import static android.support.v7.widget.AdapterHelper.UpdateOp.REMOVE;
-import static android.support.v7.widget.AdapterHelper.UpdateOp.UPDATE;
-
-class OpReorderer {
-
-    final Callback mCallback;
-
-    public OpReorderer(Callback callback) {
-        mCallback = callback;
-    }
-
-    void reorderOps(List<UpdateOp> ops) {
-        // since move operations breaks continuity, their effects on ADD/RM are hard to handle.
-        // we push them to the end of the list so that they can be handled easily.
-        int badMove;
-        while ((badMove = getLastMoveOutOfOrder(ops)) != -1) {
-            swapMoveOp(ops, badMove, badMove + 1);
-        }
-    }
-
-    private void swapMoveOp(List<UpdateOp> list, int badMove, int next) {
-        final UpdateOp moveOp = list.get(badMove);
-        final UpdateOp nextOp = list.get(next);
-        switch (nextOp.cmd) {
-            case REMOVE:
-                swapMoveRemove(list, badMove, moveOp, next, nextOp);
-                break;
-            case ADD:
-                swapMoveAdd(list, badMove, moveOp, next, nextOp);
-                break;
-            case UPDATE:
-                swapMoveUpdate(list, badMove, moveOp, next, nextOp);
-                break;
-        }
-    }
-
-    void swapMoveRemove(List<UpdateOp> list, int movePos, UpdateOp moveOp,
-            int removePos, UpdateOp removeOp) {
-        UpdateOp extraRm = null;
-        // check if move is nulled out by remove
-        boolean revertedMove = false;
-        final boolean moveIsBackwards;
-
-        if (moveOp.positionStart < moveOp.itemCount) {
-            moveIsBackwards = false;
-            if (removeOp.positionStart == moveOp.positionStart
-                    && removeOp.itemCount == moveOp.itemCount - moveOp.positionStart) {
-                revertedMove = true;
-            }
-        } else {
-            moveIsBackwards = true;
-            if (removeOp.positionStart == moveOp.itemCount + 1 &&
-                    removeOp.itemCount == moveOp.positionStart - moveOp.itemCount) {
-                revertedMove = true;
-            }
-        }
-
-        // going in reverse, first revert the effect of add
-        if (moveOp.itemCount < removeOp.positionStart) {
-            removeOp.positionStart--;
-        } else if (moveOp.itemCount < removeOp.positionStart + removeOp.itemCount) {
-            // move is removed.
-            removeOp.itemCount --;
-            moveOp.cmd = REMOVE;
-            moveOp.itemCount = 1;
-            if (removeOp.itemCount == 0) {
-                list.remove(removePos);
-                mCallback.recycleUpdateOp(removeOp);
-            }
-            // no need to swap, it is already a remove
-            return;
-        }
-
-        // now affect of add is consumed. now apply effect of first remove
-        if (moveOp.positionStart <= removeOp.positionStart) {
-            removeOp.positionStart++;
-        } else if (moveOp.positionStart < removeOp.positionStart + removeOp.itemCount) {
-            final int remaining = removeOp.positionStart + removeOp.itemCount
-                    - moveOp.positionStart;
-            extraRm = mCallback.obtainUpdateOp(REMOVE, moveOp.positionStart + 1, remaining);
-            removeOp.itemCount = moveOp.positionStart - removeOp.positionStart;
-        }
-
-        // if effects of move is reverted by remove, we are done.
-        if (revertedMove) {
-            list.set(movePos, removeOp);
-            list.remove(removePos);
-            mCallback.recycleUpdateOp(moveOp);
-            return;
-        }
-
-        // now find out the new locations for move actions
-        if (moveIsBackwards) {
-            if (extraRm != null) {
-                if (moveOp.positionStart > extraRm.positionStart) {
-                    moveOp.positionStart -= extraRm.itemCount;
-                }
-                if (moveOp.itemCount > extraRm.positionStart) {
-                    moveOp.itemCount -= extraRm.itemCount;
-                }
-            }
-            if (moveOp.positionStart > removeOp.positionStart) {
-                moveOp.positionStart -= removeOp.itemCount;
-            }
-            if (moveOp.itemCount > removeOp.positionStart) {
-                moveOp.itemCount -= removeOp.itemCount;
-            }
-        } else {
-            if (extraRm != null) {
-                if (moveOp.positionStart >= extraRm.positionStart) {
-                    moveOp.positionStart -= extraRm.itemCount;
-                }
-                if (moveOp.itemCount >= extraRm.positionStart) {
-                    moveOp.itemCount -= extraRm.itemCount;
-                }
-            }
-            if (moveOp.positionStart >= removeOp.positionStart) {
-                moveOp.positionStart -= removeOp.itemCount;
-            }
-            if (moveOp.itemCount >= removeOp.positionStart) {
-                moveOp.itemCount -= removeOp.itemCount;
-            }
-        }
-
-        list.set(movePos, removeOp);
-        if (moveOp.positionStart != moveOp.itemCount) {
-            list.set(removePos, moveOp);
-        } else {
-            list.remove(removePos);
-        }
-        if (extraRm != null) {
-            list.add(movePos, extraRm);
-        }
-    }
-
-    private void swapMoveAdd(List<UpdateOp> list, int move, UpdateOp moveOp, int add,
-            UpdateOp addOp) {
-        int offset = 0;
-        // going in reverse, first revert the effect of add
-        if (moveOp.itemCount < addOp.positionStart) {
-            offset--;
-        }
-        if (moveOp.positionStart < addOp.positionStart) {
-            offset++;
-        }
-        if (addOp.positionStart <= moveOp.positionStart) {
-            moveOp.positionStart += addOp.itemCount;
-        }
-        if (addOp.positionStart <= moveOp.itemCount) {
-            moveOp.itemCount += addOp.itemCount;
-        }
-        addOp.positionStart += offset;
-        list.set(move, addOp);
-        list.set(add, moveOp);
-    }
-
-    void swapMoveUpdate(List<UpdateOp> list, int move, UpdateOp moveOp, int update,
-            UpdateOp updateOp) {
-        UpdateOp extraUp1 = null;
-        UpdateOp extraUp2 = null;
-        // going in reverse, first revert the effect of add
-        if (moveOp.itemCount < updateOp.positionStart) {
-            updateOp.positionStart--;
-        } else if (moveOp.itemCount < updateOp.positionStart + updateOp.itemCount) {
-            // moved item is updated. add an update for it
-            updateOp.itemCount--;
-            extraUp1 = mCallback.obtainUpdateOp(UPDATE, moveOp.positionStart, 1);
-        }
-        // now affect of add is consumed. now apply effect of first remove
-        if (moveOp.positionStart <= updateOp.positionStart) {
-            updateOp.positionStart++;
-        } else if (moveOp.positionStart < updateOp.positionStart + updateOp.itemCount) {
-            final int remaining = updateOp.positionStart + updateOp.itemCount
-                    - moveOp.positionStart;
-            extraUp2 = mCallback.obtainUpdateOp(UPDATE, moveOp.positionStart + 1, remaining);
-            updateOp.itemCount -= remaining;
-        }
-        list.set(update, moveOp);
-        if (updateOp.itemCount > 0) {
-            list.set(move, updateOp);
-        } else {
-            list.remove(move);
-            mCallback.recycleUpdateOp(updateOp);
-        }
-        if (extraUp1 != null) {
-            list.add(move, extraUp1);
-        }
-        if (extraUp2 != null) {
-            list.add(move, extraUp2);
-        }
-    }
-
-    private int getLastMoveOutOfOrder(List<UpdateOp> list) {
-        boolean foundNonMove = false;
-        for (int i = list.size() - 1; i >= 0; i--) {
-            final UpdateOp op1 = list.get(i);
-            if (op1.cmd == MOVE) {
-                if (foundNonMove) {
-                    return i;
-                }
-            } else {
-                foundNonMove = true;
-            }
-        }
-        return -1;
-    }
-
-    static interface Callback {
-
-        UpdateOp obtainUpdateOp(int cmd, int startPosition, int itemCount);
-
-        void recycleUpdateOp(UpdateOp op);
-    }
-}

app/src/main/java/android/support/v7/widget/OrientationHelper.java

@@ -1,338 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.support.v7.widget;
-
-import android.view.View;
-import android.widget.LinearLayout;
-
-/**
- * Helper class for LayoutManagers to abstract measurements depending on the View's orientation.
- * <p>
- * It is developed to easily support vertical and horizontal orientations in a LayoutManager but
- * can also be used to abstract calls around view bounds and child measurements with margins and
- * decorations.
- *
- * @see #createHorizontalHelper(RecyclerView.LayoutManager)
- * @see #createVerticalHelper(RecyclerView.LayoutManager)
- */
-public abstract class OrientationHelper {
-
-    private static final int INVALID_SIZE = Integer.MIN_VALUE;
-
-    protected final RecyclerView.LayoutManager mLayoutManager;
-
-    public static final int HORIZONTAL = LinearLayout.HORIZONTAL;
-
-    public static final int VERTICAL = LinearLayout.VERTICAL;
-
-    private int mLastTotalSpace = INVALID_SIZE;
-
-    private OrientationHelper(RecyclerView.LayoutManager layoutManager) {
-        mLayoutManager = layoutManager;
-    }
-
-    /**
-     * Call this method after onLayout method is complete if state is NOT pre-layout.
-     * This method records information like layout bounds that might be useful in the next layout
-     * calculations.
-     */
-    public void onLayoutComplete() {
-        mLastTotalSpace = getTotalSpace();
-    }
-
-    /**
-     * Returns the layout space change between the previous layout pass and current layout pass.
-     * <p>
-     * Make sure you call {@link #onLayoutComplete()} at the end of your LayoutManager's
-     * {@link RecyclerView.LayoutManager#onLayoutChildren(RecyclerView.Recycler,
-     * RecyclerView.State)} method.
-     *
-     * @return The difference between the current total space and previous layout's total space.
-     * @see #onLayoutComplete()
-     */
-    public int getTotalSpaceChange() {
-        return INVALID_SIZE == mLastTotalSpace ? 0 : getTotalSpace() - mLastTotalSpace;
-    }
-
-    /**
-     * Returns the start of the view including its decoration and margin.
-     * <p>
-     * For example, for the horizontal helper, if a View's left is at pixel 20, has 2px left
-     * decoration and 3px left margin, returned value will be 15px.
-     *
-     * @param view The view element to check
-     * @return The first pixel of the element
-     * @see #getDecoratedEnd(View)
-     */
-    public abstract int getDecoratedStart(View view);
-
-    /**
-     * Returns the end of the view including its decoration and margin.
-     * <p>
-     * For example, for the horizontal helper, if a View's right is at pixel 200, has 2px right
-     * decoration and 3px right margin, returned value will be 205.
-     *
-     * @param view The view element to check
-     * @return The last pixel of the element
-     * @see #getDecoratedStart(View)
-     */
-    public abstract int getDecoratedEnd(View view);
-
-    /**
-     * Returns the space occupied by this View in the current orientation including decorations and
-     * margins.
-     *
-     * @param view The view element to check
-     * @return Total space occupied by this view
-     * @see #getDecoratedMeasurementInOther(View)
-     */
-    public abstract int getDecoratedMeasurement(View view);
-
-    /**
-     * Returns the space occupied by this View in the perpendicular orientation including
-     * decorations and margins.
-     *
-     * @param view The view element to check
-     * @return Total space occupied by this view in the perpendicular orientation to current one
-     * @see #getDecoratedMeasurement(View)
-     */
-    public abstract int getDecoratedMeasurementInOther(View view);
-
-    /**
-     * Returns the start position of the layout after the start padding is added.
-     *
-     * @return The very first pixel we can draw.
-     */
-    public abstract int getStartAfterPadding();
-
-    /**
-     * Returns the end position of the layout after the end padding is removed.
-     *
-     * @return The end boundary for this layout.
-     */
-    public abstract int getEndAfterPadding();
-
-    /**
-     * Returns the end position of the layout without taking padding into account.
-     *
-     * @return The end boundary for this layout without considering padding.
-     */
-    public abstract int getEnd();
-
-    /**
-     * Offsets all children's positions by the given amount.
-     *
-     * @param amount Value to add to each child's layout parameters
-     */
-    public abstract void offsetChildren(int amount);
-
-    /**
-     * Returns the total space to layout. This number is the difference between
-     * {@link #getEndAfterPadding()} and {@link #getStartAfterPadding()}.
-     *
-     * @return Total space to layout children
-     */
-    public abstract int getTotalSpace();
-
-    /**
-     * Offsets the child in this orientation.
-     *
-     * @param view   View to offset
-     * @param offset offset amount
-     */
-    public abstract void offsetChild(View view, int offset);
-
-    /**
-     * Returns the padding at the end of the layout. For horizontal helper, this is the right
-     * padding and for vertical helper, this is the bottom padding. This method does not check
-     * whether the layout is RTL or not.
-     *
-     * @return The padding at the end of the layout.
-     */
-    public abstract int getEndPadding();
-
-    /**
-     * Creates an OrientationHelper for the given LayoutManager and orientation.
-     *
-     * @param layoutManager LayoutManager to attach to
-     * @param orientation   Desired orientation. Should be {@link #HORIZONTAL} or {@link #VERTICAL}
-     * @return A new OrientationHelper
-     */
-    public static OrientationHelper createOrientationHelper(
-            RecyclerView.LayoutManager layoutManager, int orientation) {
-        switch (orientation) {
-            case HORIZONTAL:
-                return createHorizontalHelper(layoutManager);
-            case VERTICAL:
-                return createVerticalHelper(layoutManager);
-        }
-        throw new IllegalArgumentException("invalid orientation");
-    }
-
-    /**
-     * Creates a horizontal OrientationHelper for the given LayoutManager.
-     *
-     * @param layoutManager The LayoutManager to attach to.
-     * @return A new OrientationHelper
-     */
-    public static OrientationHelper createHorizontalHelper(
-            RecyclerView.LayoutManager layoutManager) {
-        return new OrientationHelper(layoutManager) {
-            @Override
-            public int getEndAfterPadding() {
-                return mLayoutManager.getWidth() - mLayoutManager.getPaddingRight();
-            }
-
-            @Override
-            public int getEnd() {
-                return mLayoutManager.getWidth();
-            }
-
-            @Override
-            public void offsetChildren(int amount) {
-                mLayoutManager.offsetChildrenHorizontal(amount);
-            }
-
-            @Override
-            public int getStartAfterPadding() {
-                return mLayoutManager.getPaddingLeft();
-            }
-
-            @Override
-            public int getDecoratedMeasurement(View view) {
-                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                        view.getLayoutParams();
-                return mLayoutManager.getDecoratedMeasuredWidth(view) + params.leftMargin
-                        + params.rightMargin;
-            }
-
-            @Override
-            public int getDecoratedMeasurementInOther(View view) {
-                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                        view.getLayoutParams();
-                return mLayoutManager.getDecoratedMeasuredHeight(view) + params.topMargin
-                        + params.bottomMargin;
-            }
-
-            @Override
-            public int getDecoratedEnd(View view) {
-                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                        view.getLayoutParams();
-                return mLayoutManager.getDecoratedRight(view) + params.rightMargin;
-            }
-
-            @Override
-            public int getDecoratedStart(View view) {
-                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                        view.getLayoutParams();
-                return mLayoutManager.getDecoratedLeft(view) - params.leftMargin;
-            }
-
-            @Override
-            public int getTotalSpace() {
-                return mLayoutManager.getWidth() - mLayoutManager.getPaddingLeft()
-                        - mLayoutManager.getPaddingRight();
-            }
-
-            @Override
-            public void offsetChild(View view, int offset) {
-                view.offsetLeftAndRight(offset);
-            }
-
-            @Override
-            public int getEndPadding() {
-                return mLayoutManager.getPaddingRight();
-            }
-        };
-    }
-
-    /**
-     * Creates a vertical OrientationHelper for the given LayoutManager.
-     *
-     * @param layoutManager The LayoutManager to attach to.
-     * @return A new OrientationHelper
-     */
-    public static OrientationHelper createVerticalHelper(RecyclerView.LayoutManager layoutManager) {
-        return new OrientationHelper(layoutManager) {
-            @Override
-            public int getEndAfterPadding() {
-                return mLayoutManager.getHeight() - mLayoutManager.getPaddingBottom();
-            }
-
-            @Override
-            public int getEnd() {
-                return mLayoutManager.getHeight();
-            }
-
-            @Override
-            public void offsetChildren(int amount) {
-                mLayoutManager.offsetChildrenVertical(amount);
-            }
-
-            @Override
-            public int getStartAfterPadding() {
-                return mLayoutManager.getPaddingTop();
-            }
-
-            @Override
-            public int getDecoratedMeasurement(View view) {
-                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                        view.getLayoutParams();
-                return mLayoutManager.getDecoratedMeasuredHeight(view) + params.topMargin
-                        + params.bottomMargin;
-            }
-
-            @Override
-            public int getDecoratedMeasurementInOther(View view) {
-                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                        view.getLayoutParams();
-                return mLayoutManager.getDecoratedMeasuredWidth(view) + params.leftMargin
-                        + params.rightMargin;
-            }
-
-            @Override
-            public int getDecoratedEnd(View view) {
-                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                        view.getLayoutParams();
-                return mLayoutManager.getDecoratedBottom(view) + params.bottomMargin;
-            }
-
-            @Override
-            public int getDecoratedStart(View view) {
-                final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams)
-                        view.getLayoutParams();
-                return mLayoutManager.getDecoratedTop(view) - params.topMargin;
-            }
-
-            @Override
-            public int getTotalSpace() {
-                return mLayoutManager.getHeight() - mLayoutManager.getPaddingTop()
-                        - mLayoutManager.getPaddingBottom();
-            }
-
-            @Override
-            public void offsetChild(View view, int offset) {
-                view.offsetTopAndBottom(offset);
-            }
-
-            @Override
-            public int getEndPadding() {
-                return mLayoutManager.getPaddingBottom();
-            }
-        };
-    }
-}

app/src/main/java/android/support/v7/widget/PositionMap.java

@@ -1,460 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-package android.support.v7.widget;
-
-import java.util.ArrayList;
-
-/**
- * Like a SparseArray, but with the ability to offset key ranges for bulk insertions/deletions.
- */
-class PositionMap<E> implements Cloneable {
-    private static final Object DELETED = new Object();
-    private boolean mGarbage = false;
-
-    private int[] mKeys;
-    private Object[] mValues;
-    private int mSize;
-
-    /**
-     * Creates a new SparseArray containing no mappings.
-     */
-    public PositionMap() {
-        this(10);
-    }
-
-    /**
-     * Creates a new PositionMap containing no mappings that will not
-     * require any additional memory allocation to store the specified
-     * number of mappings.  If you supply an initial capacity of 0, the
-     * sparse array will be initialized with a light-weight representation
-     * not requiring any additional array allocations.
-     */
-    public PositionMap(int initialCapacity) {
-        if (initialCapacity == 0) {
-            mKeys = ContainerHelpers.EMPTY_INTS;
-            mValues = ContainerHelpers.EMPTY_OBJECTS;
-        } else {
-            initialCapacity = idealIntArraySize(initialCapacity);
-            mKeys = new int[initialCapacity];
-            mValues = new Object[initialCapacity];
-        }
-        mSize = 0;
-    }
-
-    @Override
-    @SuppressWarnings("unchecked")
-    public PositionMap<E> clone() {
-        PositionMap<E> clone = null;
-        try {
-            clone = (PositionMap<E>) super.clone();
-            clone.mKeys = mKeys.clone();
-            clone.mValues = mValues.clone();
-        } catch (CloneNotSupportedException cnse) {
-            /* ignore */
-        }
-        return clone;
-    }
-
-    /**
-     * Gets the Object mapped from the specified key, or <code>null</code>
-     * if no such mapping has been made.
-     */
-    public E get(int key) {
-        return get(key, null);
-    }
-
-    /**
-     * Gets the Object mapped from the specified key, or the specified Object
-     * if no such mapping has been made.
-     */
-    @SuppressWarnings("unchecked")
-    public E get(int key, E valueIfKeyNotFound) {
-        int i = ContainerHelpers.binarySearch(mKeys, mSize, key);
-
-        if (i < 0 || mValues[i] == DELETED) {
-            return valueIfKeyNotFound;
-        } else {
-            return (E) mValues[i];
-        }
-    }
-
-    /**
-     * Removes the mapping from the specified key, if there was any.
-     */
-    public void delete(int key) {
-        int i = ContainerHelpers.binarySearch(mKeys, mSize, key);
-
-        if (i >= 0) {
-            if (mValues[i] != DELETED) {
-                mValues[i] = DELETED;
-                mGarbage = true;
-            }
-        }
-    }
-
-    /**
-     * Alias for {@link #delete(int)}.
-     */
-    public void remove(int key) {
-        delete(key);
-    }
-
-    /**
-     * Removes the mapping at the specified index.
-     */
-    public void removeAt(int index) {
-        if (mValues[index] != DELETED) {
-            mValues[index] = DELETED;
-            mGarbage = true;
-        }
-    }
-
-    /**
-     * Remove a range of mappings as a batch.
-     *
-     * @param index Index to begin at
-     * @param size Number of mappings to remove
-     */
-    public void removeAtRange(int index, int size) {
-        final int end = Math.min(mSize, index + size);
-        for (int i = index; i < end; i++) {
-            removeAt(i);
-        }
-    }
-
-    public void insertKeyRange(int keyStart, int count) {
-
-    }
-
-    public void removeKeyRange(ArrayList<E> removedItems, int keyStart, int count) {
-
-    }
-
-    private void gc() {
-        // Log.e("SparseArray", "gc start with " + mSize);
-
-        int n = mSize;
-        int o = 0;
-        int[] keys = mKeys;
-        Object[] values = mValues;
-
-        for (int i = 0; i < n; i++) {
-            Object val = values[i];
-
-            if (val != DELETED) {
-                if (i != o) {
-                    keys[o] = keys[i];
-                    values[o] = val;
-                    values[i] = null;
-                }
-
-                o++;
-            }
-        }
-
-        mGarbage = false;
-        mSize = o;
-
-        // Log.e("SparseArray", "gc end with " + mSize);
-    }
-
-    /**
-     * Adds a mapping from the specified key to the specified value,
-     * replacing the previous mapping from the specified key if there
-     * was one.
-     */
-    public void put(int key, E value) {
-        int i = ContainerHelpers.binarySearch(mKeys, mSize, key);
-
-        if (i >= 0) {
-            mValues[i] = value;
-        } else {
-            i = ~i;
-
-            if (i < mSize && mValues[i] == DELETED) {
-                mKeys[i] = key;
-                mValues[i] = value;
-                return;
-            }
-
-            if (mGarbage && mSize >= mKeys.length) {
-                gc();
-
-                // Search again because indices may have changed.
-                i = ~ContainerHelpers.binarySearch(mKeys, mSize, key);
-            }
-
-            if (mSize >= mKeys.length) {
-                int n = idealIntArraySize(mSize + 1);
-
-                int[] nkeys = new int[n];
-                Object[] nvalues = new Object[n];
-
-                // Log.e("SparseArray", "grow " + mKeys.length + " to " + n);
-                System.arraycopy(mKeys, 0, nkeys, 0, mKeys.length);
-                System.arraycopy(mValues, 0, nvalues, 0, mValues.length);
-
-                mKeys = nkeys;
-                mValues = nvalues;
-            }
-
-            if (mSize - i != 0) {
-                // Log.e("SparseArray", "move " + (mSize - i));
-                System.arraycopy(mKeys, i, mKeys, i + 1, mSize - i);
-                System.arraycopy(mValues, i, mValues, i + 1, mSize - i);
-            }
-
-            mKeys[i] = key;
-            mValues[i] = value;
-            mSize++;
-        }
-    }
-
-    /**
-     * Returns the number of key-value mappings that this SparseArray
-     * currently stores.
-     */
-    public int size() {
-        if (mGarbage) {
-            gc();
-        }
-
-        return mSize;
-    }
-
-    /**
-     * Given an index in the range <code>0...size()-1</code>, returns
-     * the key from the <code>index</code>th key-value mapping that this
-     * SparseArray stores.
-     */
-    public int keyAt(int index) {
-        if (mGarbage) {
-            gc();
-        }
-
-        return mKeys[index];
-    }
-
-    /**
-     * Given an index in the range <code>0...size()-1</code>, returns
-     * the value from the <code>index</code>th key-value mapping that this
-     * SparseArray stores.
-     */
-    @SuppressWarnings("unchecked")
-    public E valueAt(int index) {
-        if (mGarbage) {
-            gc();
-        }
-
-        return (E) mValues[index];
-    }
-
-    /**
-     * Given an index in the range <code>0...size()-1</code>, sets a new
-     * value for the <code>index</code>th key-value mapping that this
-     * SparseArray stores.
-     */
-    public void setValueAt(int index, E value) {
-        if (mGarbage) {
-            gc();
-        }
-
-        mValues[index] = value;
-    }
-
-    /**
-     * Returns the index for which {@link #keyAt} would return the
-     * specified key, or a negative number if the specified
-     * key is not mapped.
-     */
-    public int indexOfKey(int key) {
-        if (mGarbage) {
-            gc();
-        }
-
-        return ContainerHelpers.binarySearch(mKeys, mSize, key);
-    }
-
-    /**
-     * Returns an index for which {@link #valueAt} would return the
-     * specified key, or a negative number if no keys map to the
-     * specified value.
-     * <p>Beware that this is a linear search, unlike lookups by key,
-     * and that multiple keys can map to the same value and this will
-     * find only one of them.
-     * <p>Note also that unlike most collections' {@code indexOf} methods,
-     * this method compares values using {@code ==} rather than {@code equals}.
-     */
-    public int indexOfValue(E value) {
-        if (mGarbage) {
-            gc();
-        }
-
-        for (int i = 0; i < mSize; i++)
-            if (mValues[i] == value)
-                return i;
-
-        return -1;
-    }
-
-    /**
-     * Removes all key-value mappings from this SparseArray.
-     */
-    public void clear() {
-        int n = mSize;
-        Object[] values = mValues;
-
-        for (int i = 0; i < n; i++) {
-            values[i] = null;
-        }
-
-        mSize = 0;
-        mGarbage = false;
-    }
-
-    /**
-     * Puts a key/value pair into the array, optimizing for the case where
-     * the key is greater than all existing keys in the array.
-     */
-    public void append(int key, E value) {
-        if (mSize != 0 && key <= mKeys[mSize - 1]) {
-            put(key, value);
-            return;
-        }
-
-        if (mGarbage && mSize >= mKeys.length) {
-            gc();
-        }
-
-        int pos = mSize;
-        if (pos >= mKeys.length) {
-            int n = idealIntArraySize(pos + 1);
-
-            int[] nkeys = new int[n];
-            Object[] nvalues = new Object[n];
-
-            // Log.e("SparseArray", "grow " + mKeys.length + " to " + n);
-            System.arraycopy(mKeys, 0, nkeys, 0, mKeys.length);
-            System.arraycopy(mValues, 0, nvalues, 0, mValues.length);
-
-            mKeys = nkeys;
-            mValues = nvalues;
-        }
-
-        mKeys[pos] = key;
-        mValues[pos] = value;
-        mSize = pos + 1;
-    }
-
-    /**
-     * {@inheritDoc}
-     *
-     * <p>This implementation composes a string by iterating over its mappings. If
-     * this map contains itself as a value, the string "(this Map)"
-     * will appear in its place.
-     */
-    @Override
-    public String toString() {
-        if (size() <= 0) {
-            return "{}";
-        }
-
-        StringBuilder buffer = new StringBuilder(mSize * 28);
-        buffer.append('{');
-        for (int i=0; i<mSize; i++) {
-            if (i > 0) {
-                buffer.append(", ");
-            }
-            int key = keyAt(i);
-            buffer.append(key);
-            buffer.append('=');
-            Object value = valueAt(i);
-            if (value != this) {
-                buffer.append(value);
-            } else {
-                buffer.append("(this Map)");
-            }
-        }
-        buffer.append('}');
-        return buffer.toString();
-    }
-
-    static int idealByteArraySize(int need) {
-        for (int i = 4; i < 32; i++)
-            if (need <= (1 << i) - 12)
-                return (1 << i) - 12;
-
-        return need;
-    }
-
-    static int idealBooleanArraySize(int need) {
-        return idealByteArraySize(need);
-    }
-
-    static int idealShortArraySize(int need) {
-        return idealByteArraySize(need * 2) / 2;
-    }
-
-    static int idealCharArraySize(int need) {
-        return idealByteArraySize(need * 2) / 2;
-    }
-
-    static int idealIntArraySize(int need) {
-        return idealByteArraySize(need * 4) / 4;
-    }
-
-    static int idealFloatArraySize(int need) {
-        return idealByteArraySize(need * 4) / 4;
-    }
-
-    static int idealObjectArraySize(int need) {
-        return idealByteArraySize(need * 4) / 4;
-    }
-
-    static int idealLongArraySize(int need) {
-        return idealByteArraySize(need * 8) / 8;
-    }
-
-    static class ContainerHelpers {
-        static final boolean[] EMPTY_BOOLEANS = new boolean[0];
-        static final int[] EMPTY_INTS = new int[0];
-        static final long[] EMPTY_LONGS = new long[0];
-        static final Object[] EMPTY_OBJECTS = new Object[0];
-
-        // This is Arrays.binarySearch(), but doesn't do any argument validation.
-        static int binarySearch(int[] array, int size, int value) {
-            int lo = 0;
-            int hi = size - 1;
-
-            while (lo <= hi) {
-                final int mid = (lo + hi) >>> 1;
-                final int midVal = array[mid];
-
-                if (midVal < value) {
-                    lo = mid + 1;
-                } else if (midVal > value) {
-                    hi = mid - 1;
-                } else {
-                    return mid;  // value found
-                }
-            }
-            return ~lo;  // value not present
-        }
-    }
-
-}

app/src/main/java/android/support/v7/widget/RecyclerViewAccessibilityDelegate.java

@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.support.v7.widget;
-
-import android.os.Bundle;
-import android.support.v4.view.AccessibilityDelegateCompat;
-import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
-import android.view.View;
-import android.view.accessibility.AccessibilityEvent;
-
-/**
- * The AccessibilityDelegate used by RecyclerView.
- * <p>
- * This class handles basic accessibility actions and delegates them to LayoutManager.
- */
-public class RecyclerViewAccessibilityDelegate extends AccessibilityDelegateCompat {
-    final RecyclerView mRecyclerView;
-
-
-    public RecyclerViewAccessibilityDelegate(RecyclerView recyclerView) {
-        mRecyclerView = recyclerView;
-    }
-
-    @Override
-    public boolean performAccessibilityAction(View host, int action, Bundle args) {
-        if (super.performAccessibilityAction(host, action, args)) {
-            return true;
-        }
-        if (mRecyclerView.getLayoutManager() != null) {
-            return mRecyclerView.getLayoutManager().performAccessibilityAction(action, args);
-        }
-
-        return false;
-    }
-
-    @Override
-    public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
-        super.onInitializeAccessibilityNodeInfo(host, info);
-        info.setClassName(RecyclerView.class.getName());
-        if (mRecyclerView.getLayoutManager() != null) {
-            mRecyclerView.getLayoutManager().onInitializeAccessibilityNodeInfo(info);
-        }
-    }
-
-    @Override
-    public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) {
-        super.onInitializeAccessibilityEvent(host, event);
-        event.setClassName(RecyclerView.class.getName());
-        if (host instanceof RecyclerView) {
-            RecyclerView rv = (RecyclerView) host;
-            if (rv.getLayoutManager() != null) {
-                rv.getLayoutManager().onInitializeAccessibilityEvent(event);
-            }
-        }
-    }
-
-    AccessibilityDelegateCompat getItemDelegate() {
-        return mItemDelegate;
-    }
-
-    final AccessibilityDelegateCompat mItemDelegate = new AccessibilityDelegateCompat() {
-        @Override
-        public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
-            super.onInitializeAccessibilityNodeInfo(host, info);
-            if (mRecyclerView.getLayoutManager() != null) {
-                mRecyclerView.getLayoutManager().
-                        onInitializeAccessibilityNodeInfoForItem(host, info);
-            }
-        }
-
-        @Override
-        public boolean performAccessibilityAction(View host, int action, Bundle args) {
-            if (super.performAccessibilityAction(host, action, args)) {
-                return true;
-            }
-            if (mRecyclerView.getLayoutManager() != null) {
-                return mRecyclerView.getLayoutManager().
-                        performAccessibilityActionForItem(host, action, args);
-            }
-            return false;
-        }
-    };
-}

app/src/main/java/android/support/v7/widget/ScrollbarHelper.java

@@ -1,94 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.support.v7.widget;
-
-import android.view.View;
-
-/**
- * A helper class to do scroll offset calculations.
- */
-class ScrollbarHelper {
-
-    /**
-     * @param startChild View closest to start of the list. (top or left)
-     * @param endChild   View closest to end of the list (bottom or right)
-     */
-    static int computeScrollOffset(RecyclerView.State state, OrientationHelper orientation,
-            View startChild, View endChild, RecyclerView.LayoutManager lm,
-            boolean smoothScrollbarEnabled, boolean reverseLayout) {
-        if (lm.getChildCount() == 0 || state.getItemCount() == 0 || startChild == null ||
-                endChild == null) {
-            return 0;
-        }
-        final int minPosition = Math.min(lm.getPosition(startChild), lm.getPosition(endChild));
-        final int maxPosition = Math.max(lm.getPosition(startChild), lm.getPosition(endChild));
-        final int itemsBefore = reverseLayout
-                ? Math.max(0, state.getItemCount() - maxPosition - 1)
-                : Math.max(0, minPosition - 1);
-        if (!smoothScrollbarEnabled) {
-            return itemsBefore;
-        }
-        final int laidOutArea = Math.abs(orientation.getDecoratedEnd(endChild) -
-                orientation.getDecoratedStart(startChild));
-        final int itemRange = Math.abs(lm.getPosition(startChild) - lm.getPosition(endChild)) + 1;
-        final float avgSizePerRow = (float) laidOutArea / itemRange;
-
-        return Math.round(itemsBefore * avgSizePerRow + (orientation.getStartAfterPadding()
-                - orientation.getDecoratedStart(startChild)));
-    }
-
-    /**
-     * @param startChild View closest to start of the list. (top or left)
-     * @param endChild   View closest to end of the list (bottom or right)
-     */
-    static int computeScrollExtent(RecyclerView.State state, OrientationHelper orientation,
-            View startChild, View endChild, RecyclerView.LayoutManager lm,
-            boolean smoothScrollbarEnabled) {
-        if (lm.getChildCount() == 0 || state.getItemCount() == 0 || startChild == null ||
-                endChild == null) {
-            return 0;
-        }
-        if (!smoothScrollbarEnabled) {
-            return Math.abs(lm.getPosition(startChild) - lm.getPosition(endChild)) + 1;
-        }
-        final int extend = orientation.getDecoratedEnd(endChild)
-                - orientation.getDecoratedStart(startChild);
-        return Math.min(orientation.getTotalSpace(), extend);
-    }
-
-    /**
-     * @param startChild View closest to start of the list. (top or left)
-     * @param endChild   View closest to end of the list (bottom or right)
-     */
-    static int computeScrollRange(RecyclerView.State state, OrientationHelper orientation,
-            View startChild, View endChild, RecyclerView.LayoutManager lm,
-            boolean smoothScrollbarEnabled) {
-        if (lm.getChildCount() == 0 || state.getItemCount() == 0 || startChild == null ||
-                endChild == null) {
-            return 0;
-        }
-        if (!smoothScrollbarEnabled) {
-            return state.getItemCount();
-        }
-        // smooth scrollbar enabled. try to estimate better.
-        final int laidOutArea = orientation.getDecoratedEnd(endChild) -
-                orientation.getDecoratedStart(startChild);
-        final int laidOutRange = Math.abs(lm.getPosition(startChild) - lm.getPosition(endChild))
-                + 1;
-        // estimate a size for full list.
-        return (int) ((float) laidOutArea / laidOutRange * state.getItemCount());
-    }
-}

app/src/main/java/androidx/swiperefreshlayout/widget/CircleImageView.java

@@ -0,0 +1,159 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.swiperefreshlayout.widget;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.RadialGradient;
+import android.graphics.Shader;
+import android.graphics.drawable.ShapeDrawable;
+import android.graphics.drawable.shapes.OvalShape;
+import android.view.View;
+import android.view.animation.Animation;
+import android.widget.ImageView;
+
+import androidx.core.content.ContextCompat;
+import androidx.core.view.ViewCompat;
+
+/**
+ * Private class created to work around issues with AnimationListeners being
+ * called before the animation is actually complete and support shadows on older
+ * platforms.
+ */
+class CircleImageView extends ImageView {
+
+    private static final int KEY_SHADOW_COLOR = 0x1E000000;
+    private static final int FILL_SHADOW_COLOR = 0x3D000000;
+    // PX
+    private static final float X_OFFSET = 0f;
+    private static final float Y_OFFSET = 1.75f;
+    private static final float SHADOW_RADIUS = 3.5f;
+    private static final int SHADOW_ELEVATION = 4;
+
+    private Animation.AnimationListener mListener;
+    int mShadowRadius;
+
+    CircleImageView(Context context, int color) {
+        super(context);
+        final float density = getContext().getResources().getDisplayMetrics().density;
+        final int shadowYOffset = (int) (density * Y_OFFSET);
+        final int shadowXOffset = (int) (density * X_OFFSET);
+
+        mShadowRadius = (int) (density * SHADOW_RADIUS);
+
+        ShapeDrawable circle;
+        if (elevationSupported()) {
+            circle = new ShapeDrawable(new OvalShape());
+            ViewCompat.setElevation(this, SHADOW_ELEVATION * density);
+        } else {
+            OvalShape oval = new OvalShadow(mShadowRadius);
+            circle = new ShapeDrawable(oval);
+            setLayerType(View.LAYER_TYPE_SOFTWARE, circle.getPaint());
+            circle.getPaint().setShadowLayer(mShadowRadius, shadowXOffset, shadowYOffset,
+                    KEY_SHADOW_COLOR);
+            final int padding = mShadowRadius;
+            // set padding so the inner image sits correctly within the shadow.
+            setPadding(padding, padding, padding, padding);
+        }
+        circle.getPaint().setColor(color);
+        ViewCompat.setBackground(this, circle);
+    }
+
+    private boolean elevationSupported() {
+        return android.os.Build.VERSION.SDK_INT >= 21;
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        if (!elevationSupported()) {
+            setMeasuredDimension(getMeasuredWidth() + mShadowRadius * 2, getMeasuredHeight()
+                    + mShadowRadius * 2);
+        }
+    }
+
+    public void setAnimationListener(Animation.AnimationListener listener) {
+        mListener = listener;
+    }
+
+    @Override
+    public void onAnimationStart() {
+        super.onAnimationStart();
+        if (mListener != null) {
+            mListener.onAnimationStart(getAnimation());
+        }
+    }
+
+    @Override
+    public void onAnimationEnd() {
+        super.onAnimationEnd();
+        if (mListener != null) {
+            mListener.onAnimationEnd(getAnimation());
+        }
+    }
+
+    /**
+     * Update the background color of the circle image view.
+     *
+     * @param colorRes Id of a color resource.
+     */
+    public void setBackgroundColorRes(int colorRes) {
+        setBackgroundColor(ContextCompat.getColor(getContext(), colorRes));
+    }
+
+    @Override
+    public void setBackgroundColor(int color) {
+        if (getBackground() instanceof ShapeDrawable) {
+            ((ShapeDrawable) getBackground()).getPaint().setColor(color);
+        }
+    }
+
+    private class OvalShadow extends OvalShape {
+        private RadialGradient mRadialGradient;
+        private Paint mShadowPaint;
+
+        OvalShadow(int shadowRadius) {
+            super();
+            mShadowPaint = new Paint();
+            mShadowRadius = shadowRadius;
+            updateRadialGradient((int) rect().width());
+        }
+
+        @Override
+        protected void onResize(float width, float height) {
+            super.onResize(width, height);
+            updateRadialGradient((int) width);
+        }
+
+        @Override
+        public void draw(Canvas canvas, Paint paint) {
+            final int viewWidth = CircleImageView.this.getWidth();
+            final int viewHeight = CircleImageView.this.getHeight();
+            canvas.drawCircle(viewWidth / 2, viewHeight / 2, viewWidth / 2, mShadowPaint);
+            canvas.drawCircle(viewWidth / 2, viewHeight / 2, viewWidth / 2 - mShadowRadius, paint);
+        }
+
+        private void updateRadialGradient(int diameter) {
+            mRadialGradient = new RadialGradient(diameter / 2, diameter / 2,
+                    mShadowRadius, new int[] { FILL_SHADOW_COLOR, Color.TRANSPARENT },
+                    null, Shader.TileMode.CLAMP);
+            mShadowPaint.setShader(mRadialGradient);
+        }
+    }
+}

app/src/main/java/androidx/swiperefreshlayout/widget/ViewPagerSwipeRefreshLayout.java

@@ -0,0 +1,58 @@
+package androidx.swiperefreshlayout.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.ViewConfiguration;
+
+public class ViewPagerSwipeRefreshLayout extends SwipeRefreshLayout {
+
+    private float startY;
+    private float startX;
+    // 记录viewPager是否拖拽的标记
+    private boolean mIsVpDragger;
+    private final int mTouchSlop;
+
+    public ViewPagerSwipeRefreshLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent ev) {
+        int action = ev.getAction();
+        switch (action) {
+            case MotionEvent.ACTION_DOWN:
+                // 记录手指按下的位置
+                startY = ev.getY();
+                startX = ev.getX();
+                // 初始化标记
+                mIsVpDragger = false;
+                break;
+            case MotionEvent.ACTION_MOVE:
+                // 如果viewpager正在拖拽中，那么不拦截它的事件，直接return false；
+                if(mIsVpDragger) {
+                    return false;
+                }
+
+                // 获取当前手指位置
+                float endY = ev.getY();
+                float endX = ev.getX();
+                float distanceX = Math.abs(endX - startX);
+                float distanceY = Math.abs(endY - startY);
+                // 如果X轴位移大于Y轴位移，那么将事件交给viewPager处理。
+                if(distanceX > mTouchSlop && distanceX > distanceY) {
+                    mIsVpDragger = true;
+                    return false;
+                }
+                break;
+            case MotionEvent.ACTION_UP:
+            case MotionEvent.ACTION_CANCEL:
+                // 初始化标记
+                mIsVpDragger = false;
+                break;
+        }
+        // 如果是Y轴位移大于X轴，事件交给swipeRefreshLayout处理。
+        return super.onInterceptTouchEvent(ev);
+    }
+}

app/src/main/java/com/android/apksig/ApkSignerEngine.java

@@ -0,0 +1,550 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig;
+
+import com.android.apksig.apk.ApkFormatException;
+import com.android.apksig.util.DataSink;
+import com.android.apksig.util.DataSource;
+import com.android.apksig.util.RunnablesExecutor;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.IOException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SignatureException;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * APK signing logic which is independent of how input and output APKs are stored, parsed, and
+ * generated.
+ *
+ * <p><h3>Operating Model</h3>
+ *
+ * The abstract operating model is that there is an input APK which is being signed, thus producing
+ * an output APK. In reality, there may be just an output APK being built from scratch, or the input
+ * APK and the output APK may be the same file. Because this engine does not deal with reading and
+ * writing files, it can handle all of these scenarios.
+ *
+ * <p>The engine is stateful and thus cannot be used for signing multiple APKs. However, once
+ * the engine signed an APK, the engine can be used to re-sign the APK after it has been modified.
+ * This may be more efficient than signing the APK using a new instance of the engine. See
+ * <a href="#incremental">Incremental Operation</a>.
+ *
+ * <p>In the engine's operating model, a signed APK is produced as follows.
+ * <ol>
+ * <li>JAR entries to be signed are output,</li>
+ * <li>JAR archive is signed using JAR signing, thus adding the so-called v1 signature to the
+ *     output,</li>
+ * <li>JAR archive is signed using APK Signature Scheme v2, thus adding the so-called v2 signature
+ *     to the output.</li>
+ * </ol>
+ *
+ * <p>The input APK may contain JAR entries which, depending on the engine's configuration, may or
+ * may not be output (e.g., existing signatures may need to be preserved or stripped) or which the
+ * engine will overwrite as part of signing. The engine thus offers {@link #inputJarEntry(String)}
+ * which tells the client whether the input JAR entry needs to be output. This avoids the need for
+ * the client to hard-code the aspects of APK signing which determine which parts of input must be
+ * ignored. Similarly, the engine offers {@link #inputApkSigningBlock(DataSource)} to help the
+ * client avoid dealing with preserving or stripping APK Signature Scheme v2 signature of the input
+ * APK.
+ *
+ * <p>To use the engine to sign an input APK (or a collection of JAR entries), follow these
+ * steps:
+ * <ol>
+ * <li>Obtain a new instance of the engine -- engine instances are stateful and thus cannot be used
+ *     for signing multiple APKs.</li>
+ * <li>Locate the input APK's APK Signing Block and provide it to
+ *     {@link #inputApkSigningBlock(DataSource)}.</li>
+ * <li>For each JAR entry in the input APK, invoke {@link #inputJarEntry(String)} to determine
+ *     whether this entry should be output. The engine may request to inspect the entry.</li>
+ * <li>For each output JAR entry, invoke {@link #outputJarEntry(String)} which may request to
+ *     inspect the entry.</li>
+ * <li>Once all JAR entries have been output, invoke {@link #outputJarEntries()} which may request
+ *     that additional JAR entries are output. These entries comprise the output APK's JAR
+ *     signature.</li>
+ * <li>Locate the ZIP Central Directory and ZIP End of Central Directory sections in the output and
+ *     invoke {@link #outputZipSections2(DataSource, DataSource, DataSource)} which may request that
+ *     an APK Signature Block is inserted before the ZIP Central Directory. The block contains the
+ *     output APK's APK Signature Scheme v2 signature.</li>
+ * <li>Invoke {@link #outputDone()} to signal that the APK was output in full. The engine will
+ *     confirm that the output APK is signed.</li>
+ * <li>Invoke {@link #close()} to signal that the engine will no longer be used. This lets the
+ *     engine free any resources it no longer needs.
+ * </ol>
+ *
+ * <p>Some invocations of the engine may provide the client with a task to perform. The client is
+ * expected to perform all requested tasks before proceeding to the next stage of signing. See
+ * documentation of each method about the deadlines for performing the tasks requested by the
+ * method.
+ *
+ * <p><h3 id="incremental">Incremental Operation</h3></a>
+ *
+ * The engine supports incremental operation where a signed APK is produced, then modified and
+ * re-signed. This may be useful for IDEs, where an app is frequently re-signed after small changes
+ * by the developer. Re-signing may be more efficient than signing from scratch.
+ *
+ * <p>To use the engine in incremental mode, keep notifying the engine of changes to the APK through
+ * {@link #inputApkSigningBlock(DataSource)}, {@link #inputJarEntry(String)},
+ * {@link #inputJarEntryRemoved(String)}, {@link #outputJarEntry(String)},
+ * and {@link #outputJarEntryRemoved(String)}, perform the tasks requested by the engine through
+ * these methods, and, when a new signed APK is desired, run through steps 5 onwards to re-sign the
+ * APK.
+ *
+ * <p><h3>Output-only Operation</h3>
+ *
+ * The engine's abstract operating model consists of an input APK and an output APK. However, it is
+ * possible to use the engine in output-only mode where the engine's {@code input...} methods are
+ * not invoked. In this mode, the engine has less control over output because it cannot request that
+ * some JAR entries are not output. Nevertheless, the engine will attempt to make the output APK
+ * signed and will report an error if cannot do so.
+ *
+ * @see <a href="https://source.android.com/security/apksigning/index.html">Application Signing</a>
+ */
+public interface ApkSignerEngine extends Closeable {
+
+    default void setExecutor(RunnablesExecutor executor) {
+        throw new UnsupportedOperationException("setExecutor method is not implemented");
+    }
+
+    /**
+     * Initializes the signer engine with the data already present in the apk (if any). There
+     * might already be data that can be reused if the entries has not been changed.
+     *
+     * @param manifestBytes
+     * @param entryNames
+     * @return set of entry names which were processed by the engine during the initialization, a
+     *         subset of entryNames
+     */
+    default Set<String> initWith(byte[] manifestBytes, Set<String> entryNames) {
+        throw new UnsupportedOperationException("initWith method is not implemented");
+    }
+
+    /**
+     * Indicates to this engine that the input APK contains the provided APK Signing Block. The
+     * block may contain signatures of the input APK, such as APK Signature Scheme v2 signatures.
+     *
+     * @param apkSigningBlock APK signing block of the input APK. The provided data source is
+     *        guaranteed to not be used by the engine after this method terminates.
+     *
+     * @throws IOException if an I/O error occurs while reading the APK Signing Block
+     * @throws ApkFormatException if the APK Signing Block is malformed
+     * @throws IllegalStateException if this engine is closed
+     */
+    void inputApkSigningBlock(DataSource apkSigningBlock)
+            throws IOException, ApkFormatException, IllegalStateException;
+
+    /**
+     * Indicates to this engine that the specified JAR entry was encountered in the input APK.
+     *
+     * <p>When an input entry is updated/changed, it's OK to not invoke
+     * {@link #inputJarEntryRemoved(String)} before invoking this method.
+     *
+     * @return instructions about how to proceed with this entry
+     *
+     * @throws IllegalStateException if this engine is closed
+     */
+    InputJarEntryInstructions inputJarEntry(String entryName) throws IllegalStateException;
+
+    /**
+     * Indicates to this engine that the specified JAR entry was output.
+     *
+     * <p>It is unnecessary to invoke this method for entries added to output by this engine (e.g.,
+     * requested by {@link #outputJarEntries()}) provided the entries were output with exactly the
+     * data requested by the engine.
+     *
+     * <p>When an already output entry is updated/changed, it's OK to not invoke
+     * {@link #outputJarEntryRemoved(String)} before invoking this method.
+     *
+     * @return request to inspect the entry or {@code null} if the engine does not need to inspect
+     *         the entry. The request must be fulfilled before {@link #outputJarEntries()} is
+     *         invoked.
+     *
+     * @throws IllegalStateException if this engine is closed
+     */
+    InspectJarEntryRequest outputJarEntry(String entryName) throws IllegalStateException;
+
+    /**
+     * Indicates to this engine that the specified JAR entry was removed from the input. It's safe
+     * to invoke this for entries for which {@link #inputJarEntry(String)} hasn't been invoked.
+     *
+     * @return output policy of this JAR entry. The policy indicates how this input entry affects
+     *         the output APK. The client of this engine should use this information to determine
+     *         how the removal of this input APK's JAR entry affects the output APK.
+     *
+     * @throws IllegalStateException if this engine is closed
+     */
+    InputJarEntryInstructions.OutputPolicy inputJarEntryRemoved(String entryName)
+            throws IllegalStateException;
+
+    /**
+     * Indicates to this engine that the specified JAR entry was removed from the output. It's safe
+     * to invoke this for entries for which {@link #outputJarEntry(String)} hasn't been invoked.
+     *
+     * @throws IllegalStateException if this engine is closed
+     */
+    void outputJarEntryRemoved(String entryName) throws IllegalStateException;
+
+    /**
+     * Indicates to this engine that all JAR entries have been output.
+     *
+     * @return request to add JAR signature to the output or {@code null} if there is no need to add
+     *         a JAR signature. The request will contain additional JAR entries to be output. The
+     *         request must be fulfilled before
+     *         {@link #outputZipSections2(DataSource, DataSource, DataSource)} is invoked.
+     *
+     * @throws ApkFormatException if the APK is malformed in a way which is preventing this engine
+     *         from producing a valid signature. For example, if the engine uses the provided
+     *         {@code META-INF/MANIFEST.MF} as a template and the file is malformed.
+     * @throws NoSuchAlgorithmException if a signature could not be generated because a required
+     *         cryptographic algorithm implementation is missing
+     * @throws InvalidKeyException if a signature could not be generated because a signing key is
+     *         not suitable for generating the signature
+     * @throws SignatureException if an error occurred while generating a signature
+     * @throws IllegalStateException if there are unfulfilled requests, such as to inspect some JAR
+     *         entries, or if the engine is closed
+     */
+    OutputJarSignatureRequest outputJarEntries()
+            throws ApkFormatException, NoSuchAlgorithmException, InvalidKeyException,
+            SignatureException, IllegalStateException;
+
+    /**
+     * Indicates to this engine that the ZIP sections comprising the output APK have been output.
+     *
+     * <p>The provided data sources are guaranteed to not be used by the engine after this method
+     * terminates.
+     *
+     * @deprecated This is now superseded by {@link #outputZipSections2(DataSource, DataSource,
+     * DataSource)}.
+     *
+     * @param zipEntries the section of ZIP archive containing Local File Header records and data of
+     *        the ZIP entries. In a well-formed archive, this section starts at the start of the
+     *        archive and extends all the way to the ZIP Central Directory.
+     * @param zipCentralDirectory ZIP Central Directory section
+     * @param zipEocd ZIP End of Central Directory (EoCD) record
+     *
+     * @return request to add an APK Signing Block to the output or {@code null} if the output must
+     *         not contain an APK Signing Block. The request must be fulfilled before
+     *         {@link #outputDone()} is invoked.
+     *
+     * @throws IOException if an I/O error occurs while reading the provided ZIP sections
+     * @throws ApkFormatException if the provided APK is malformed in a way which prevents this
+     *         engine from producing a valid signature. For example, if the APK Signing Block
+     *         provided to the engine is malformed.
+     * @throws NoSuchAlgorithmException if a signature could not be generated because a required
+     *         cryptographic algorithm implementation is missing
+     * @throws InvalidKeyException if a signature could not be generated because a signing key is
+     *         not suitable for generating the signature
+     * @throws SignatureException if an error occurred while generating a signature
+     * @throws IllegalStateException if there are unfulfilled requests, such as to inspect some JAR
+     *         entries or to output JAR signature, or if the engine is closed
+     */
+    @Deprecated
+    OutputApkSigningBlockRequest outputZipSections(
+            DataSource zipEntries,
+            DataSource zipCentralDirectory,
+            DataSource zipEocd)
+            throws IOException, ApkFormatException, NoSuchAlgorithmException,
+            InvalidKeyException, SignatureException, IllegalStateException;
+
+    /**
+     * Indicates to this engine that the ZIP sections comprising the output APK have been output.
+     *
+     * <p>The provided data sources are guaranteed to not be used by the engine after this method
+     * terminates.
+     *
+     * @param zipEntries the section of ZIP archive containing Local File Header records and data of
+     *        the ZIP entries. In a well-formed archive, this section starts at the start of the
+     *        archive and extends all the way to the ZIP Central Directory.
+     * @param zipCentralDirectory ZIP Central Directory section
+     * @param zipEocd ZIP End of Central Directory (EoCD) record
+     *
+     * @return request to add an APK Signing Block to the output or {@code null} if the output must
+     *         not contain an APK Signing Block. The request must be fulfilled before
+     *         {@link #outputDone()} is invoked.
+     *
+     * @throws IOException if an I/O error occurs while reading the provided ZIP sections
+     * @throws ApkFormatException if the provided APK is malformed in a way which prevents this
+     *         engine from producing a valid signature. For example, if the APK Signing Block
+     *         provided to the engine is malformed.
+     * @throws NoSuchAlgorithmException if a signature could not be generated because a required
+     *         cryptographic algorithm implementation is missing
+     * @throws InvalidKeyException if a signature could not be generated because a signing key is
+     *         not suitable for generating the signature
+     * @throws SignatureException if an error occurred while generating a signature
+     * @throws IllegalStateException if there are unfulfilled requests, such as to inspect some JAR
+     *         entries or to output JAR signature, or if the engine is closed
+     */
+    OutputApkSigningBlockRequest2 outputZipSections2(
+            DataSource zipEntries,
+            DataSource zipCentralDirectory,
+            DataSource zipEocd)
+            throws IOException, ApkFormatException, NoSuchAlgorithmException,
+            InvalidKeyException, SignatureException, IllegalStateException;
+
+    /**
+     * Indicates to this engine that the signed APK was output.
+     *
+     * <p>This does not change the output APK. The method helps the client confirm that the current
+     * output is signed.
+     *
+     * @throws IllegalStateException if there are unfulfilled requests, such as to inspect some JAR
+     *         entries or to output signatures, or if the engine is closed
+     */
+    void outputDone() throws IllegalStateException;
+
+    /**
+     * Generates a V4 signature proto and write to output file.
+     *
+     * @param data Input data to calculate a verity hash tree and hash root
+     * @param outputFile To store the serialized V4 Signature.
+     * @param ignoreFailures Whether any failures will be silently ignored.
+     * @throws InvalidKeyException if a signature could not be generated because a signing key is
+     *         not suitable for generating the signature
+     * @throws NoSuchAlgorithmException if a signature could not be generated because a required
+     *         cryptographic algorithm implementation is missing
+     * @throws SignatureException if an error occurred while generating a signature
+     * @throws IOException if protobuf fails to be serialized and written to file
+     */
+    void signV4(DataSource data, File outputFile, boolean ignoreFailures)
+            throws InvalidKeyException, NoSuchAlgorithmException, SignatureException, IOException;
+
+    /**
+     * Checks if the signing configuration provided to the engine is capable of creating a
+     * SourceStamp.
+     */
+    default boolean isEligibleForSourceStamp() {
+        return false;
+    }
+
+    /** Generates the digest of the certificate used to sign the source stamp. */
+    default byte[] generateSourceStampCertificateDigest() throws SignatureException {
+        return new byte[0];
+    }
+
+    /**
+     * Indicates to this engine that it will no longer be used. Invoking this on an already closed
+     * engine is OK.
+     *
+     * <p>This does not change the output APK. For example, if the output APK is not yet fully
+     * signed, it will remain so after this method terminates.
+     */
+    @Override
+    void close();
+
+    /**
+     * Instructions about how to handle an input APK's JAR entry.
+     *
+     * <p>The instructions indicate whether to output the entry (see {@link #getOutputPolicy()}) and
+     * may contain a request to inspect the entry (see {@link #getInspectJarEntryRequest()}), in
+     * which case the request must be fulfilled before {@link ApkSignerEngine#outputJarEntries()} is
+     * invoked.
+     */
+    public static class InputJarEntryInstructions {
+        private final OutputPolicy mOutputPolicy;
+        private final InspectJarEntryRequest mInspectJarEntryRequest;
+
+        /**
+         * Constructs a new {@code InputJarEntryInstructions} instance with the provided entry
+         * output policy and without a request to inspect the entry.
+         */
+        public InputJarEntryInstructions(OutputPolicy outputPolicy) {
+            this(outputPolicy, null);
+        }
+
+        /**
+         * Constructs a new {@code InputJarEntryInstructions} instance with the provided entry
+         * output mode and with the provided request to inspect the entry.
+         *
+         * @param inspectJarEntryRequest request to inspect the entry or {@code null} if there's no
+         *        need to inspect the entry.
+         */
+        public InputJarEntryInstructions(
+                OutputPolicy outputPolicy,
+                InspectJarEntryRequest inspectJarEntryRequest) {
+            mOutputPolicy = outputPolicy;
+            mInspectJarEntryRequest = inspectJarEntryRequest;
+        }
+
+        /**
+         * Returns the output policy for this entry.
+         */
+        public OutputPolicy getOutputPolicy() {
+            return mOutputPolicy;
+        }
+
+        /**
+         * Returns the request to inspect the JAR entry or {@code null} if there is no need to
+         * inspect the entry.
+         */
+        public InspectJarEntryRequest getInspectJarEntryRequest() {
+            return mInspectJarEntryRequest;
+        }
+
+        /**
+         * Output policy for an input APK's JAR entry.
+         */
+        public static enum OutputPolicy {
+            /** Entry must not be output. */
+            SKIP,
+
+            /** Entry should be output. */
+            OUTPUT,
+
+            /** Entry will be output by the engine. The client can thus ignore this input entry. */
+            OUTPUT_BY_ENGINE,
+        }
+    }
+
+    /**
+     * Request to inspect the specified JAR entry.
+     *
+     * <p>The entry's uncompressed data must be provided to the data sink returned by
+     * {@link #getDataSink()}. Once the entry's data has been provided to the sink, {@link #done()}
+     * must be invoked.
+     */
+    interface InspectJarEntryRequest {
+
+        /**
+         * Returns the data sink into which the entry's uncompressed data should be sent.
+         */
+        DataSink getDataSink();
+
+        /**
+         * Indicates that entry's data has been provided in full.
+         */
+        void done();
+
+        /**
+         * Returns the name of the JAR entry.
+         */
+        String getEntryName();
+    }
+
+    /**
+     * Request to add JAR signature (aka v1 signature) to the output APK.
+     *
+     * <p>Entries listed in {@link #getAdditionalJarEntries()} must be added to the output APK after
+     * which {@link #done()} must be invoked.
+     */
+    interface OutputJarSignatureRequest {
+
+        /**
+         * Returns JAR entries that must be added to the output APK.
+         */
+        List<JarEntry> getAdditionalJarEntries();
+
+        /**
+         * Indicates that the JAR entries contained in this request were added to the output APK.
+         */
+        void done();
+
+        /**
+         * JAR entry.
+         */
+        public static class JarEntry {
+            private final String mName;
+            private final byte[] mData;
+
+            /**
+             * Constructs a new {@code JarEntry} with the provided name and data.
+             *
+             * @param data uncompressed data of the entry. Changes to this array will not be
+             *        reflected in {@link #getData()}.
+             */
+            public JarEntry(String name, byte[] data) {
+                mName = name;
+                mData = data.clone();
+            }
+
+            /**
+             * Returns the name of this ZIP entry.
+             */
+            public String getName() {
+                return mName;
+            }
+
+            /**
+             * Returns the uncompressed data of this JAR entry.
+             */
+            public byte[] getData() {
+                return mData.clone();
+            }
+        }
+    }
+
+    /**
+     * Request to add the specified APK Signing Block to the output APK. APK Signature Scheme v2
+     * signature(s) of the APK are contained in this block.
+     *
+     * <p>The APK Signing Block returned by {@link #getApkSigningBlock()} must be placed into the
+     * output APK such that the block is immediately before the ZIP Central Directory, the offset of
+     * ZIP Central Directory in the ZIP End of Central Directory record must be adjusted
+     * accordingly, and then {@link #done()} must be invoked.
+     *
+     * <p>If the output contains an APK Signing Block, that block must be replaced by the block
+     * contained in this request.
+     *
+     * @deprecated This is now superseded by {@link OutputApkSigningBlockRequest2}.
+     */
+    @Deprecated
+    interface OutputApkSigningBlockRequest {
+
+        /**
+         * Returns the APK Signing Block.
+         */
+        byte[] getApkSigningBlock();
+
+        /**
+         * Indicates that the APK Signing Block was output as requested.
+         */
+        void done();
+    }
+
+    /**
+     * Request to add the specified APK Signing Block to the output APK. APK Signature Scheme v2
+     * signature(s) of the APK are contained in this block.
+     *
+     * <p>The APK Signing Block returned by {@link #getApkSigningBlock()} must be placed into the
+     * output APK such that the block is immediately before the ZIP Central Directory. Immediately
+     * before the APK Signing Block must be padding consists of the number of 0x00 bytes returned by
+     * {@link #getPaddingSizeBeforeApkSigningBlock()}. The offset of ZIP Central Directory in the
+     * ZIP End of Central Directory record must be adjusted accordingly, and then {@link #done()}
+     * must be invoked.
+     *
+     * <p>If the output contains an APK Signing Block, that block must be replaced by the block
+     * contained in this request.
+     */
+    interface OutputApkSigningBlockRequest2 {
+        /**
+         * Returns the APK Signing Block.
+         */
+        byte[] getApkSigningBlock();
+
+        /**
+         * Indicates that the APK Signing Block was output as requested.
+         */
+        void done();
+
+        /**
+         * Returns the number of 0x00 bytes the caller must place immediately before APK Signing
+         * Block.
+         */
+        int getPaddingSizeBeforeApkSigningBlock();
+    }
+}

app/src/main/java/com/android/apksig/ApkVerificationIssue.java

@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig;
+
+/**
+ * This class is intended as a lightweight representation of an APK signature verification issue
+ * where the client does not require the additional textual details provided by a subclass.
+ */
+public class ApkVerificationIssue {
+    /* The V2 signer(s) could not be read from the V2 signature block */
+    public static final int V2_SIG_MALFORMED_SIGNERS = 1;
+    /* A V2 signature block exists without any V2 signers */
+    public static final int V2_SIG_NO_SIGNERS = 2;
+    /* Failed to parse a signer's block in the V2 signature block */
+    public static final int V2_SIG_MALFORMED_SIGNER = 3;
+    /* Failed to parse the signer's signature record in the V2 signature block */
+    public static final int V2_SIG_MALFORMED_SIGNATURE = 4;
+    /* The V2 signer contained no signatures */
+    public static final int V2_SIG_NO_SIGNATURES = 5;
+    /* The V2 signer's certificate could not be parsed */
+    public static final int V2_SIG_MALFORMED_CERTIFICATE = 6;
+    /* No signing certificates exist for the V2 signer */
+    public static final int V2_SIG_NO_CERTIFICATES = 7;
+    /* Failed to parse the V2 signer's digest record */
+    public static final int V2_SIG_MALFORMED_DIGEST = 8;
+    /* The V3 signer(s) could not be read from the V3 signature block */
+    public static final int V3_SIG_MALFORMED_SIGNERS = 9;
+    /* A V3 signature block exists without any V3 signers */
+    public static final int V3_SIG_NO_SIGNERS = 10;
+    /* Failed to parse a signer's block in the V3 signature block */
+    public static final int V3_SIG_MALFORMED_SIGNER = 11;
+    /* Failed to parse the signer's signature record in the V3 signature block */
+    public static final int V3_SIG_MALFORMED_SIGNATURE = 12;
+    /* The V3 signer contained no signatures */
+    public static final int V3_SIG_NO_SIGNATURES = 13;
+    /* The V3 signer's certificate could not be parsed */
+    public static final int V3_SIG_MALFORMED_CERTIFICATE = 14;
+    /* No signing certificates exist for the V3 signer */
+    public static final int V3_SIG_NO_CERTIFICATES = 15;
+    /* Failed to parse the V3 signer's digest record */
+    public static final int V3_SIG_MALFORMED_DIGEST = 16;
+    /* The source stamp signer contained no signatures */
+    public static final int SOURCE_STAMP_NO_SIGNATURE = 17;
+    /* The source stamp signer's certificate could not be parsed */
+    public static final int SOURCE_STAMP_MALFORMED_CERTIFICATE = 18;
+    /* The source stamp contains a signature produced using an unknown algorithm */
+    public static final int SOURCE_STAMP_UNKNOWN_SIG_ALGORITHM = 19;
+    /* Failed to parse the signer's signature in the source stamp signature block */
+    public static final int SOURCE_STAMP_MALFORMED_SIGNATURE = 20;
+    /* The source stamp's signature block failed verification */
+    public static final int SOURCE_STAMP_DID_NOT_VERIFY = 21;
+    /* An exception was encountered when verifying the source stamp */
+    public static final int SOURCE_STAMP_VERIFY_EXCEPTION = 22;
+    /* The certificate digest in the APK does not match the expected digest */
+    public static final int SOURCE_STAMP_EXPECTED_DIGEST_MISMATCH = 23;
+    /*
+     * The APK contains a source stamp signature block without a corresponding stamp certificate
+     * digest in the APK contents.
+     */
+    public static final int SOURCE_STAMP_SIGNATURE_BLOCK_WITHOUT_CERT_DIGEST = 24;
+    /*
+     * The APK does not contain the source stamp certificate digest file nor the source stamp
+     * signature block.
+     */
+    public static final int SOURCE_STAMP_CERT_DIGEST_AND_SIG_BLOCK_MISSING = 25;
+    /*
+     * None of the signatures provided by the source stamp were produced with a known signature
+     * algorithm.
+     */
+    public static final int SOURCE_STAMP_NO_SUPPORTED_SIGNATURE = 26;
+    /*
+     * The source stamp signer's certificate in the signing block does not match the certificate in
+     * the APK.
+     */
+    public static final int SOURCE_STAMP_CERTIFICATE_MISMATCH_BETWEEN_SIGNATURE_BLOCK_AND_APK = 27;
+    /* The APK could not be properly parsed due to a ZIP or APK format exception */
+    public static final int MALFORMED_APK = 28;
+    /* An unexpected exception was caught when attempting to verify the APK's signatures */
+    public static final int UNEXPECTED_EXCEPTION = 29;
+    /* The APK contains the certificate digest file but does not contain a stamp signature block */
+    public static final int SOURCE_STAMP_SIG_MISSING = 30;
+    /* Source stamp block contains a malformed attribute. */
+    public static final int SOURCE_STAMP_MALFORMED_ATTRIBUTE = 31;
+    /* Source stamp block contains an unknown attribute. */
+    public static final int SOURCE_STAMP_UNKNOWN_ATTRIBUTE = 32;
+    /**
+     * Failed to parse the SigningCertificateLineage structure in the source stamp
+     * attributes section.
+     */
+    public static final int SOURCE_STAMP_MALFORMED_LINEAGE = 33;
+    /**
+     * The source stamp certificate does not match the terminal node in the provided
+     * proof-of-rotation structure describing the stamp certificate history.
+     */
+    public static final int SOURCE_STAMP_POR_CERT_MISMATCH = 34;
+    /**
+     * The source stamp SigningCertificateLineage attribute contains a proof-of-rotation record
+     * with signature(s) that did not verify.
+     */
+    public static final int SOURCE_STAMP_POR_DID_NOT_VERIFY = 35;
+    /** No V1 / jar signing signature blocks were found in the APK. */
+    public static final int JAR_SIG_NO_SIGNATURES = 36;
+    /** An exception was encountered when parsing the V1 / jar signer in the signature block. */
+    public static final int JAR_SIG_PARSE_EXCEPTION = 37;
+
+    private final int mIssueId;
+    private final String mFormat;
+    private final Object[] mParams;
+
+    /**
+     * Constructs a new {@code ApkVerificationIssue} using the provided {@code format} string and
+     * {@code params}.
+     */
+    public ApkVerificationIssue(String format, Object... params) {
+        mIssueId = -1;
+        mFormat = format;
+        mParams = params;
+    }
+
+    /**
+     * Constructs a new {@code ApkVerificationIssue} using the provided {@code issueId} and {@code
+     * params}.
+     */
+    public ApkVerificationIssue(int issueId, Object... params) {
+        mIssueId = issueId;
+        mFormat = null;
+        mParams = params;
+    }
+
+    /**
+     * Returns the numeric ID for this issue.
+     */
+    public int getIssueId() {
+        return mIssueId;
+    }
+
+    /**
+     * Returns the optional parameters for this issue.
+     */
+    public Object[] getParams() {
+        return mParams;
+    }
+
+    @Override
+    public String toString() {
+        // If this instance was created by a subclass with a format string then return the same
+        // formatted String as the subclass.
+        if (mFormat != null) {
+            return String.format(mFormat, mParams);
+        }
+        StringBuilder result = new StringBuilder("mIssueId: ").append(mIssueId);
+        for (Object param : mParams) {
+            result.append(", ").append(param.toString());
+        }
+        return result.toString();
+    }
+}

app/src/main/java/com/android/apksig/Constants.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig;
+
+import com.android.apksig.internal.apk.stamp.SourceStampConstants;
+import com.android.apksig.internal.apk.v1.V1SchemeConstants;
+import com.android.apksig.internal.apk.v2.V2SchemeConstants;
+import com.android.apksig.internal.apk.v3.V3SchemeConstants;
+
+/**
+ * Exports internally defined constants to allow clients to reference these values without relying
+ * on internal code.
+ */
+public class Constants {
+    private Constants() {}
+
+    public static final int VERSION_SOURCE_STAMP = 0;
+    public static final int VERSION_JAR_SIGNATURE_SCHEME = 1;
+    public static final int VERSION_APK_SIGNATURE_SCHEME_V2 = 2;
+    public static final int VERSION_APK_SIGNATURE_SCHEME_V3 = 3;
+    public static final int VERSION_APK_SIGNATURE_SCHEME_V4 = 4;
+
+    public static final String MANIFEST_ENTRY_NAME = V1SchemeConstants.MANIFEST_ENTRY_NAME;
+
+    public static final int APK_SIGNATURE_SCHEME_V2_BLOCK_ID =
+            V2SchemeConstants.APK_SIGNATURE_SCHEME_V2_BLOCK_ID;
+
+    public static final int APK_SIGNATURE_SCHEME_V3_BLOCK_ID =
+            V3SchemeConstants.APK_SIGNATURE_SCHEME_V3_BLOCK_ID;
+    public static final int PROOF_OF_ROTATION_ATTR_ID = V3SchemeConstants.PROOF_OF_ROTATION_ATTR_ID;
+
+    public static final int V1_SOURCE_STAMP_BLOCK_ID =
+            SourceStampConstants.V1_SOURCE_STAMP_BLOCK_ID;
+    public static final int V2_SOURCE_STAMP_BLOCK_ID =
+            SourceStampConstants.V2_SOURCE_STAMP_BLOCK_ID;
+
+    public static final String OID_RSA_ENCRYPTION = "1.2.840.113549.1.1.1";
+}

app/src/main/java/com/android/apksig/Hints.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.apksig;
+import java.io.IOException;
+import java.io.DataOutputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.UnsupportedEncodingException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public final class Hints {
+    /**
+     * Name of hint pattern asset file in APK.
+     */
+    public static final String PIN_HINT_ASSET_ZIP_ENTRY_NAME = "assets/com.android.hints.pins.txt";
+
+    /**
+     * Name of hint byte range data file in APK.  Keep in sync with PinnerService.java.
+     */
+    public static final String PIN_BYTE_RANGE_ZIP_ENTRY_NAME = "pinlist.meta";
+
+    private static int clampToInt(long value) {
+        return (int) Math.max(0, Math.min(value, Integer.MAX_VALUE));
+    }
+
+    public static final class ByteRange {
+        final long start;
+        final long end;
+
+        public ByteRange(long start, long end) {
+            this.start = start;
+            this.end = end;
+        }
+    }
+
+    public static final class PatternWithRange {
+        final Pattern pattern;
+        final long offset;
+        final long size;
+
+        public PatternWithRange(String pattern) {
+            this.pattern = Pattern.compile(pattern);
+            this.offset= 0;
+            this.size = Long.MAX_VALUE;
+        }
+
+        public PatternWithRange(String pattern, long offset, long size) {
+            this.pattern = Pattern.compile(pattern);
+            this.offset = offset;
+            this.size = size;
+        }
+
+        public Matcher matcher(CharSequence input) {
+            return this.pattern.matcher(input);
+        }
+
+        public ByteRange ClampToAbsoluteByteRange(ByteRange rangeIn) {
+            if (rangeIn.end - rangeIn.start < this.offset) {
+                return null;
+            }
+            long rangeOutStart = rangeIn.start + this.offset;
+            long rangeOutSize = Math.min(rangeIn.end - rangeOutStart,
+                                           this.size);
+            return new ByteRange(rangeOutStart,
+                                 rangeOutStart + rangeOutSize);
+        }
+    }
+
+    /**
+     * Create a blob of bytes that PinnerService understands as a
+     * sequence of byte ranges to pin.
+     */
+    public static byte[] encodeByteRangeList(List<ByteRange> pinByteRanges) {
+        ByteArrayOutputStream bos = new ByteArrayOutputStream(pinByteRanges.size() * 8);
+        DataOutputStream out = new DataOutputStream(bos);
+        try {
+            for (ByteRange pinByteRange : pinByteRanges) {
+                out.writeInt(clampToInt(pinByteRange.start));
+                out.writeInt(clampToInt(pinByteRange.end - pinByteRange.start));
+            }
+        } catch (IOException ex) {
+            throw new AssertionError("impossible", ex);
+        }
+        return bos.toByteArray();
+    }
+
+    public static ArrayList<PatternWithRange> parsePinPatterns(byte[] patternBlob) {
+        ArrayList<PatternWithRange> pinPatterns = new ArrayList<>();
+        try {
+            for (String rawLine : new String(patternBlob, "UTF-8").split("\n")) {
+                String line = rawLine.replaceFirst("#.*", "");  // # starts a comment
+                String[] fields = line.split(" ");
+                if (fields.length == 1) {
+                    pinPatterns.add(new PatternWithRange(fields[0]));
+                } else if (fields.length == 3) {
+                    long start = Long.parseLong(fields[1]);
+                    long end = Long.parseLong(fields[2]);
+                    pinPatterns.add(new PatternWithRange(fields[0], start, end - start));
+                } else {
+                    throw new AssertionError("bad pin pattern line " + line);
+                }
+            }
+        } catch (UnsupportedEncodingException ex) {
+            throw new RuntimeException("UTF-8 must be supported", ex);
+        }
+        return pinPatterns;
+    }
+}

app/src/main/java/com/android/apksig/SourceStampVerifier.java

@@ -0,0 +1,882 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig;
+
+import static com.android.apksig.Constants.VERSION_APK_SIGNATURE_SCHEME_V2;
+import static com.android.apksig.Constants.VERSION_APK_SIGNATURE_SCHEME_V3;
+import static com.android.apksig.Constants.VERSION_JAR_SIGNATURE_SCHEME;
+import static com.android.apksig.apk.ApkUtilsLite.computeSha256DigestBytes;
+import static com.android.apksig.internal.apk.stamp.SourceStampConstants.SOURCE_STAMP_CERTIFICATE_HASH_ZIP_ENTRY_NAME;
+import static com.android.apksig.internal.apk.v1.V1SchemeConstants.MANIFEST_ENTRY_NAME;
+
+import com.android.apksig.apk.ApkFormatException;
+import com.android.apksig.apk.ApkUtilsLite;
+import com.android.apksig.internal.apk.ApkSigResult;
+import com.android.apksig.internal.apk.ApkSignerInfo;
+import com.android.apksig.internal.apk.ApkSigningBlockUtilsLite;
+import com.android.apksig.internal.apk.ContentDigestAlgorithm;
+import com.android.apksig.internal.apk.SignatureAlgorithm;
+import com.android.apksig.internal.apk.SignatureInfo;
+import com.android.apksig.internal.apk.SignatureNotFoundException;
+import com.android.apksig.internal.apk.stamp.SourceStampConstants;
+import com.android.apksig.internal.apk.stamp.V2SourceStampVerifier;
+import com.android.apksig.internal.apk.v2.V2SchemeConstants;
+import com.android.apksig.internal.apk.v3.V3SchemeConstants;
+import com.android.apksig.internal.util.AndroidSdkVersion;
+import com.android.apksig.internal.util.GuaranteedEncodedFormX509Certificate;
+import com.android.apksig.internal.zip.CentralDirectoryRecord;
+import com.android.apksig.internal.zip.LocalFileRecord;
+import com.android.apksig.internal.zip.ZipUtils;
+import com.android.apksig.util.DataSource;
+import com.android.apksig.util.DataSources;
+import com.android.apksig.zip.ZipFormatException;
+import com.android.apksig.zip.ZipSections;
+
+import java.io.ByteArrayInputStream;
+import java.io.Closeable;
+import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.BufferUnderflowException;
+import java.nio.ByteBuffer;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.EnumMap;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * APK source stamp verifier intended only to verify the validity of the stamp signature.
+ *
+ * <p>Note, this verifier does not validate the signatures of the jar signing / APK signature blocks
+ * when obtaining the digests for verification. This verifier should only be used in cases where
+ * another mechanism has already been used to verify the APK signatures.
+ */
+public class SourceStampVerifier {
+    private final File mApkFile;
+    private final DataSource mApkDataSource;
+
+    private final int mMinSdkVersion;
+    private final int mMaxSdkVersion;
+
+    private SourceStampVerifier(
+            File apkFile,
+            DataSource apkDataSource,
+            int minSdkVersion,
+            int maxSdkVersion) {
+        mApkFile = apkFile;
+        mApkDataSource = apkDataSource;
+        mMinSdkVersion = minSdkVersion;
+        mMaxSdkVersion = maxSdkVersion;
+    }
+
+    /**
+     * Verifies the APK's source stamp signature and returns the result of the verification.
+     *
+     * <p>The APK's source stamp can be considered verified if the result's {@link
+     * Result#isVerified()} returns {@code true}. If source stamp verification fails all of the
+     * resulting errors can be obtained from {@link Result#getAllErrors()}, or individual errors
+     * can be obtained as follows:
+     * <ul>
+     *     <li>Obtain the generic errors via {@link Result#getErrors()}
+     *     <li>Obtain the V2 signers via {@link Result#getV2SchemeSigners()}, then for each signer
+     *     query for any errors with {@link Result.SignerInfo#getErrors()}
+     *     <li>Obtain the V3 signers via {@link Result#getV3SchemeSigners()}, then for each signer
+     *     query for any errors with {@link Result.SignerInfo#getErrors()}
+     *     <li>Obtain the source stamp signer via {@link Result#getSourceStampInfo()}, then query
+     *     for any stamp errors with {@link Result.SourceStampInfo#getErrors()}
+     * </ul>
+     */
+    public SourceStampVerifier.Result verifySourceStamp() {
+        return verifySourceStamp(null);
+    }
+
+    /**
+     * Verifies the APK's source stamp signature, including verification that the SHA-256 digest of
+     * the stamp signing certificate matches the {@code expectedCertDigest}, and returns the result
+     * of the verification.
+     *
+     * <p>A value of {@code null} for the {@code expectedCertDigest} will verify the source stamp,
+     * if present, without verifying the actual source stamp certificate used to sign the source
+     * stamp. This can be used to verify an APK contains a properly signed source stamp without
+     * verifying a particular signer.
+     *
+     * @see #verifySourceStamp()
+     */
+    public SourceStampVerifier.Result verifySourceStamp(String expectedCertDigest) {
+        Closeable in = null;
+        try {
+            DataSource apk;
+            if (mApkDataSource != null) {
+                apk = mApkDataSource;
+            } else if (mApkFile != null) {
+                RandomAccessFile f = new RandomAccessFile(mApkFile, "r");
+                in = f;
+                apk = DataSources.asDataSource(f, 0, f.length());
+            } else {
+                throw new IllegalStateException("APK not provided");
+            }
+            return verifySourceStamp(apk, expectedCertDigest);
+        } catch (IOException e) {
+            Result result = new Result();
+            result.addVerificationError(ApkVerificationIssue.UNEXPECTED_EXCEPTION, e);
+            return result;
+        } finally {
+            if (in != null) {
+                try {
+                    in.close();
+                } catch (IOException ignored) {
+                }
+            }
+        }
+    }
+
+    /**
+     * Verifies the provided {@code apk}'s source stamp signature, including verification of the
+     * SHA-256 digest of the stamp signing certificate matches the {@code expectedCertDigest}, and
+     * returns the result of the verification.
+     *
+     * @see #verifySourceStamp(String)
+     */
+    private SourceStampVerifier.Result verifySourceStamp(DataSource apk,
+            String expectedCertDigest) {
+        Result result = new Result();
+        try {
+            ZipSections zipSections = ApkUtilsLite.findZipSections(apk);
+            // Attempt to obtain the source stamp's certificate digest from the APK.
+            List<CentralDirectoryRecord> cdRecords =
+                    ZipUtils.parseZipCentralDirectory(apk, zipSections);
+            CentralDirectoryRecord sourceStampCdRecord = null;
+            for (CentralDirectoryRecord cdRecord : cdRecords) {
+                if (SOURCE_STAMP_CERTIFICATE_HASH_ZIP_ENTRY_NAME.equals(cdRecord.getName())) {
+                    sourceStampCdRecord = cdRecord;
+                    break;
+                }
+            }
+
+            // If the source stamp's certificate digest is not available within the APK then the
+            // source stamp cannot be verified; check if a source stamp signing block is in the
+            // APK's signature block to determine the appropriate status to return.
+            if (sourceStampCdRecord == null) {
+                boolean stampSigningBlockFound;
+                try {
+                    ApkSigningBlockUtilsLite.findSignature(apk, zipSections,
+                            SourceStampConstants.V2_SOURCE_STAMP_BLOCK_ID);
+                    stampSigningBlockFound = true;
+                } catch (SignatureNotFoundException e) {
+                    stampSigningBlockFound = false;
+                }
+                result.addVerificationError(stampSigningBlockFound
+                        ? ApkVerificationIssue.SOURCE_STAMP_SIGNATURE_BLOCK_WITHOUT_CERT_DIGEST
+                        : ApkVerificationIssue.SOURCE_STAMP_CERT_DIGEST_AND_SIG_BLOCK_MISSING);
+                return result;
+            }
+
+            // Verify that the contents of the source stamp certificate digest match the expected
+            // value, if provided.
+            byte[] sourceStampCertificateDigest =
+                    LocalFileRecord.getUncompressedData(
+                            apk,
+                            sourceStampCdRecord,
+                            zipSections.getZipCentralDirectoryOffset());
+            if (expectedCertDigest != null) {
+                String actualCertDigest = ApkSigningBlockUtilsLite.toHex(
+                        sourceStampCertificateDigest);
+                if (!expectedCertDigest.equalsIgnoreCase(actualCertDigest)) {
+                    result.addVerificationError(
+                            ApkVerificationIssue.SOURCE_STAMP_EXPECTED_DIGEST_MISMATCH,
+                            actualCertDigest, expectedCertDigest);
+                    return result;
+                }
+            }
+
+            Map<Integer, Map<ContentDigestAlgorithm, byte[]>> signatureSchemeApkContentDigests =
+                    new HashMap<>();
+            if (mMaxSdkVersion >= AndroidSdkVersion.P) {
+                SignatureInfo signatureInfo;
+                try {
+                    signatureInfo = ApkSigningBlockUtilsLite.findSignature(apk, zipSections,
+                            V3SchemeConstants.APK_SIGNATURE_SCHEME_V3_BLOCK_ID);
+                } catch (SignatureNotFoundException e) {
+                    signatureInfo = null;
+                }
+                if (signatureInfo != null) {
+                    Map<ContentDigestAlgorithm, byte[]> apkContentDigests = new EnumMap<>(
+                            ContentDigestAlgorithm.class);
+                    parseSigners(signatureInfo.signatureBlock, VERSION_APK_SIGNATURE_SCHEME_V3,
+                            apkContentDigests, result);
+                    signatureSchemeApkContentDigests.put(
+                            VERSION_APK_SIGNATURE_SCHEME_V3, apkContentDigests);
+                }
+            }
+
+            if (mMaxSdkVersion >= AndroidSdkVersion.N && (mMinSdkVersion < AndroidSdkVersion.P ||
+                    signatureSchemeApkContentDigests.isEmpty())) {
+                SignatureInfo signatureInfo;
+                try {
+                    signatureInfo = ApkSigningBlockUtilsLite.findSignature(apk, zipSections,
+                            V2SchemeConstants.APK_SIGNATURE_SCHEME_V2_BLOCK_ID);
+                } catch (SignatureNotFoundException e) {
+                    signatureInfo = null;
+                }
+                if (signatureInfo != null) {
+                    Map<ContentDigestAlgorithm, byte[]> apkContentDigests = new EnumMap<>(
+                            ContentDigestAlgorithm.class);
+                    parseSigners(signatureInfo.signatureBlock, VERSION_APK_SIGNATURE_SCHEME_V2,
+                            apkContentDigests, result);
+                    signatureSchemeApkContentDigests.put(
+                            VERSION_APK_SIGNATURE_SCHEME_V2, apkContentDigests);
+                }
+            }
+
+            if (mMinSdkVersion < AndroidSdkVersion.N
+                    || signatureSchemeApkContentDigests.isEmpty()) {
+                Map<ContentDigestAlgorithm, byte[]> apkContentDigests =
+                        getApkContentDigestFromV1SigningScheme(cdRecords, apk, zipSections, result);
+                signatureSchemeApkContentDigests.put(VERSION_JAR_SIGNATURE_SCHEME,
+                        apkContentDigests);
+            }
+
+            ApkSigResult sourceStampResult =
+                    V2SourceStampVerifier.verify(
+                            apk,
+                            zipSections,
+                            sourceStampCertificateDigest,
+                            signatureSchemeApkContentDigests,
+                            mMinSdkVersion,
+                            mMaxSdkVersion);
+            result.mergeFrom(sourceStampResult);
+            return result;
+        } catch (ApkFormatException | IOException | ZipFormatException e) {
+            result.addVerificationError(ApkVerificationIssue.MALFORMED_APK, e);
+        } catch (NoSuchAlgorithmException e) {
+            result.addVerificationError(ApkVerificationIssue.UNEXPECTED_EXCEPTION, e);
+        } catch (SignatureNotFoundException e) {
+            result.addVerificationError(ApkVerificationIssue.SOURCE_STAMP_SIG_MISSING);
+        }
+        return result;
+    }
+
+    /**
+     * Parses each signer in the provided APK V2 / V3 signature block and populates corresponding
+     * {@code SignerInfo} of the provided {@code result} and their {@code apkContentDigests}.
+     *
+     * <p>This method adds one or more errors to the {@code result} if a verification error is
+     * expected to be encountered on an Android platform version in the
+     * {@code [minSdkVersion, maxSdkVersion]} range.
+     */
+    public static void parseSigners(
+            ByteBuffer apkSignatureSchemeBlock,
+            int apkSigSchemeVersion,
+            Map<ContentDigestAlgorithm, byte[]> apkContentDigests,
+            Result result) {
+        boolean isV2Block = apkSigSchemeVersion == VERSION_APK_SIGNATURE_SCHEME_V2;
+        // Both the V2 and V3 signature blocks contain the following:
+        // * length-prefixed sequence of length-prefixed signers
+        ByteBuffer signers;
+        try {
+            signers = ApkSigningBlockUtilsLite.getLengthPrefixedSlice(apkSignatureSchemeBlock);
+        } catch (ApkFormatException e) {
+            result.addVerificationWarning(isV2Block ? ApkVerificationIssue.V2_SIG_MALFORMED_SIGNERS
+                    : ApkVerificationIssue.V3_SIG_MALFORMED_SIGNERS);
+            return;
+        }
+        if (!signers.hasRemaining()) {
+            result.addVerificationWarning(isV2Block ? ApkVerificationIssue.V2_SIG_NO_SIGNERS
+                    : ApkVerificationIssue.V3_SIG_NO_SIGNERS);
+            return;
+        }
+
+        CertificateFactory certFactory;
+        try {
+            certFactory = CertificateFactory.getInstance("X.509");
+        } catch (CertificateException e) {
+            throw new RuntimeException("Failed to obtain X.509 CertificateFactory", e);
+        }
+        while (signers.hasRemaining()) {
+            Result.SignerInfo signerInfo = new Result.SignerInfo();
+            if (isV2Block) {
+                result.addV2Signer(signerInfo);
+            } else {
+                result.addV3Signer(signerInfo);
+            }
+            try {
+                ByteBuffer signer = ApkSigningBlockUtilsLite.getLengthPrefixedSlice(signers);
+                parseSigner(
+                        signer,
+                        apkSigSchemeVersion,
+                        certFactory,
+                        apkContentDigests,
+                        signerInfo);
+            } catch (ApkFormatException | BufferUnderflowException e) {
+                signerInfo.addVerificationWarning(
+                        isV2Block ? ApkVerificationIssue.V2_SIG_MALFORMED_SIGNER
+                                : ApkVerificationIssue.V3_SIG_MALFORMED_SIGNER);
+                return;
+            }
+        }
+    }
+
+    /**
+     * Parses the provided signer block and populates the {@code result}.
+     *
+     * <p>This verifies signatures over {@code signed-data} contained in this block but does not
+     * verify the integrity of the rest of the APK. To facilitate APK integrity verification, this
+     * method adds the {@code contentDigestsToVerify}. These digests can then be used to verify the
+     * integrity of the APK.
+     *
+     * <p>This method adds one or more errors to the {@code result} if a verification error is
+     * expected to be encountered on an Android platform version in the
+     * {@code [minSdkVersion, maxSdkVersion]} range.
+     */
+    private static void parseSigner(
+            ByteBuffer signerBlock,
+            int apkSigSchemeVersion,
+            CertificateFactory certFactory,
+            Map<ContentDigestAlgorithm, byte[]> apkContentDigests,
+            Result.SignerInfo signerInfo)
+            throws ApkFormatException {
+        boolean isV2Signer = apkSigSchemeVersion == VERSION_APK_SIGNATURE_SCHEME_V2;
+        // Both the V2 and V3 signer blocks contain the following:
+        // * length-prefixed signed data
+        //   * length-prefixed sequence of length-prefixed digests:
+        //     * uint32: signature algorithm ID
+        //     * length-prefixed bytes: digest of contents
+        //   * length-prefixed sequence of certificates:
+        //     * length-prefixed bytes: X.509 certificate (ASN.1 DER encoded).
+        ByteBuffer signedData = ApkSigningBlockUtilsLite.getLengthPrefixedSlice(signerBlock);
+        ByteBuffer digests = ApkSigningBlockUtilsLite.getLengthPrefixedSlice(signedData);
+        ByteBuffer certificates = ApkSigningBlockUtilsLite.getLengthPrefixedSlice(signedData);
+
+        // Parse the digests block
+        while (digests.hasRemaining()) {
+            try {
+                ByteBuffer digest = ApkSigningBlockUtilsLite.getLengthPrefixedSlice(digests);
+                int sigAlgorithmId = digest.getInt();
+                byte[] digestBytes = ApkSigningBlockUtilsLite.readLengthPrefixedByteArray(digest);
+                SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.findById(sigAlgorithmId);
+                if (signatureAlgorithm == null) {
+                    continue;
+                }
+                apkContentDigests.put(signatureAlgorithm.getContentDigestAlgorithm(), digestBytes);
+            } catch (ApkFormatException | BufferUnderflowException e) {
+                signerInfo.addVerificationWarning(
+                        isV2Signer ? ApkVerificationIssue.V2_SIG_MALFORMED_DIGEST
+                                : ApkVerificationIssue.V3_SIG_MALFORMED_DIGEST);
+                return;
+            }
+        }
+
+        // Parse the certificates block
+        if (certificates.hasRemaining()) {
+            byte[] encodedCert = ApkSigningBlockUtilsLite.readLengthPrefixedByteArray(certificates);
+            X509Certificate certificate;
+            try {
+                certificate = (X509Certificate) certFactory.generateCertificate(
+                        new ByteArrayInputStream(encodedCert));
+            } catch (CertificateException e) {
+                signerInfo.addVerificationWarning(
+                        isV2Signer ? ApkVerificationIssue.V2_SIG_MALFORMED_CERTIFICATE
+                                : ApkVerificationIssue.V3_SIG_MALFORMED_CERTIFICATE);
+                return;
+            }
+            // Wrap the cert so that the result's getEncoded returns exactly the original encoded
+            // form. Without this, getEncoded may return a different form from what was stored in
+            // the signature. This is because some X509Certificate(Factory) implementations
+            // re-encode certificates.
+            certificate = new GuaranteedEncodedFormX509Certificate(certificate, encodedCert);
+            signerInfo.setSigningCertificate(certificate);
+        }
+
+        if (signerInfo.getSigningCertificate() == null) {
+            signerInfo.addVerificationWarning(
+                    isV2Signer ? ApkVerificationIssue.V2_SIG_NO_CERTIFICATES
+                            : ApkVerificationIssue.V3_SIG_NO_CERTIFICATES);
+            return;
+        }
+    }
+
+    /**
+     * Returns a mapping of the {@link ContentDigestAlgorithm} to the {@code byte[]} digest of the
+     * V1 / jar signing META-INF/MANIFEST.MF; if this file is not found then an empty {@code Map} is
+     * returned.
+     *
+     * <p>If any errors are encountered while parsing the V1 signers the provided {@code result}
+     * will be updated to include a warning, but the source stamp verification can still proceed.
+     */
+    private static Map<ContentDigestAlgorithm, byte[]> getApkContentDigestFromV1SigningScheme(
+            List<CentralDirectoryRecord> cdRecords,
+            DataSource apk,
+            ZipSections zipSections,
+            Result result)
+            throws IOException, ApkFormatException {
+        CentralDirectoryRecord manifestCdRecord = null;
+        List<CentralDirectoryRecord> signatureBlockRecords = new ArrayList<>(1);
+        Map<ContentDigestAlgorithm, byte[]> v1ContentDigest = new EnumMap<>(
+                ContentDigestAlgorithm.class);
+        for (CentralDirectoryRecord cdRecord : cdRecords) {
+            String cdRecordName = cdRecord.getName();
+            if (cdRecordName == null) {
+                continue;
+            }
+            if (manifestCdRecord == null && MANIFEST_ENTRY_NAME.equals(cdRecordName)) {
+                manifestCdRecord = cdRecord;
+                continue;
+            }
+            if (cdRecordName.startsWith("META-INF/")
+                    && (cdRecordName.endsWith(".RSA")
+                        || cdRecordName.endsWith(".DSA")
+                        || cdRecordName.endsWith(".EC"))) {
+                signatureBlockRecords.add(cdRecord);
+            }
+        }
+        if (manifestCdRecord == null) {
+            // No JAR signing manifest file found. For SourceStamp verification, returning an empty
+            // digest is enough since this would affect the final digest signed by the stamp, and
+            // thus an empty digest will invalidate that signature.
+            return v1ContentDigest;
+        }
+        if (signatureBlockRecords.isEmpty()) {
+            result.addVerificationWarning(ApkVerificationIssue.JAR_SIG_NO_SIGNATURES);
+        } else {
+            for (CentralDirectoryRecord signatureBlockRecord : signatureBlockRecords) {
+                try {
+                    CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
+                    byte[] signatureBlockBytes = LocalFileRecord.getUncompressedData(apk,
+                            signatureBlockRecord, zipSections.getZipCentralDirectoryOffset());
+                    for (Certificate certificate : certFactory.generateCertificates(
+                            new ByteArrayInputStream(signatureBlockBytes))) {
+                        // If multiple certificates are found within the signature block only the
+                        // first is used as the signer of this block.
+                        if (certificate instanceof X509Certificate) {
+                            Result.SignerInfo signerInfo = new Result.SignerInfo();
+                            signerInfo.setSigningCertificate((X509Certificate) certificate);
+                            result.addV1Signer(signerInfo);
+                            break;
+                        }
+                    }
+                } catch (CertificateException e) {
+                    // Log a warning for the parsing exception but still proceed with the stamp
+                    // verification.
+                    result.addVerificationWarning(ApkVerificationIssue.JAR_SIG_PARSE_EXCEPTION,
+                            signatureBlockRecord.getName(), e);
+                    break;
+                } catch (ZipFormatException e) {
+                    throw new ApkFormatException("Failed to read APK", e);
+                }
+            }
+        }
+        try {
+            byte[] manifestBytes =
+                    LocalFileRecord.getUncompressedData(
+                            apk, manifestCdRecord, zipSections.getZipCentralDirectoryOffset());
+            v1ContentDigest.put(
+                    ContentDigestAlgorithm.SHA256, computeSha256DigestBytes(manifestBytes));
+            return v1ContentDigest;
+        } catch (ZipFormatException e) {
+            throw new ApkFormatException("Failed to read APK", e);
+        }
+    }
+
+    /**
+     * Result of verifying the APK's source stamp signature; this signature can only be considered
+     * verified if {@link #isVerified()} returns true.
+     */
+    public static class Result {
+        private final List<SignerInfo> mV1SchemeSigners = new ArrayList<>();
+        private final List<SignerInfo> mV2SchemeSigners = new ArrayList<>();
+        private final List<SignerInfo> mV3SchemeSigners = new ArrayList<>();
+        private final List<List<SignerInfo>> mAllSchemeSigners = Arrays.asList(mV1SchemeSigners,
+                mV2SchemeSigners, mV3SchemeSigners);
+        private SourceStampInfo mSourceStampInfo;
+
+        private final List<ApkVerificationIssue> mErrors = new ArrayList<>();
+        private final List<ApkVerificationIssue> mWarnings = new ArrayList<>();
+
+        private boolean mVerified;
+
+        void addVerificationError(int errorId, Object... params) {
+            mErrors.add(new ApkVerificationIssue(errorId, params));
+        }
+
+        void addVerificationWarning(int warningId, Object... params) {
+            mWarnings.add(new ApkVerificationIssue(warningId, params));
+        }
+
+        private void addV1Signer(SignerInfo signerInfo) {
+            mV1SchemeSigners.add(signerInfo);
+        }
+
+        private void addV2Signer(SignerInfo signerInfo) {
+            mV2SchemeSigners.add(signerInfo);
+        }
+
+        private void addV3Signer(SignerInfo signerInfo) {
+            mV3SchemeSigners.add(signerInfo);
+        }
+
+        /**
+         * Returns {@code true} if the APK's source stamp signature
+         */
+        public boolean isVerified() {
+            return mVerified;
+        }
+
+        private void mergeFrom(ApkSigResult source) {
+            switch (source.signatureSchemeVersion) {
+                case Constants.VERSION_SOURCE_STAMP:
+                    mVerified = source.verified;
+                    if (!source.mSigners.isEmpty()) {
+                        mSourceStampInfo = new SourceStampInfo(source.mSigners.get(0));
+                    }
+                    break;
+                default:
+                    throw new IllegalArgumentException(
+                            "Unknown ApkSigResult Signing Block Scheme Id "
+                                    + source.signatureSchemeVersion);
+            }
+        }
+
+        /**
+         * Returns a {@code List} of {@link SignerInfo} objects representing the V1 signers of the
+         * provided APK.
+         */
+        public List<SignerInfo> getV1SchemeSigners() {
+            return mV1SchemeSigners;
+        }
+
+        /**
+         * Returns a {@code List} of {@link SignerInfo} objects representing the V2 signers of the
+         * provided APK.
+         */
+        public List<SignerInfo> getV2SchemeSigners() {
+            return mV2SchemeSigners;
+        }
+
+        /**
+         * Returns a {@code List} of {@link SignerInfo} objects representing the V3 signers of the
+         * provided APK.
+         */
+        public List<SignerInfo> getV3SchemeSigners() {
+            return mV3SchemeSigners;
+        }
+
+        /**
+         * Returns the {@link SourceStampInfo} instance representing the source stamp signer for the
+         * APK, or null if the source stamp signature verification failed before the stamp signature
+         * block could be fully parsed.
+         */
+        public SourceStampInfo getSourceStampInfo() {
+            return mSourceStampInfo;
+        }
+
+        /**
+         * Returns {@code true} if an error was encountered while verifying the APK.
+         *
+         * <p>Any error prevents the APK from being considered verified.
+         */
+        public boolean containsErrors() {
+            if (!mErrors.isEmpty()) {
+                return true;
+            }
+            for (List<SignerInfo> signers : mAllSchemeSigners) {
+                for (SignerInfo signer : signers) {
+                    if (signer.containsErrors()) {
+                        return true;
+                    }
+                }
+            }
+            if (mSourceStampInfo != null) {
+                if (mSourceStampInfo.containsErrors()) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        /**
+         * Returns the errors encountered while verifying the APK's source stamp.
+         */
+        public List<ApkVerificationIssue> getErrors() {
+            return mErrors;
+        }
+
+        /**
+         * Returns the warnings encountered while verifying the APK's source stamp.
+         */
+        public List<ApkVerificationIssue> getWarnings() {
+            return mWarnings;
+        }
+
+        /**
+         * Returns all errors for this result, including any errors from signature scheme signers
+         * and the source stamp.
+         */
+        public List<ApkVerificationIssue> getAllErrors() {
+            List<ApkVerificationIssue> errors = new ArrayList<>();
+            errors.addAll(mErrors);
+
+            for (List<SignerInfo> signers : mAllSchemeSigners) {
+                for (SignerInfo signer : signers) {
+                    errors.addAll(signer.getErrors());
+                }
+            }
+            if (mSourceStampInfo != null) {
+                errors.addAll(mSourceStampInfo.getErrors());
+            }
+            return errors;
+        }
+
+        /**
+         * Returns all warnings for this result, including any warnings from signature scheme
+         * signers and the source stamp.
+         */
+        public List<ApkVerificationIssue> getAllWarnings() {
+            List<ApkVerificationIssue> warnings = new ArrayList<>();
+            warnings.addAll(mWarnings);
+
+            for (List<SignerInfo> signers : mAllSchemeSigners) {
+                for (SignerInfo signer : signers) {
+                    warnings.addAll(signer.getWarnings());
+                }
+            }
+            if (mSourceStampInfo != null) {
+                warnings.addAll(mSourceStampInfo.getWarnings());
+            }
+            return warnings;
+        }
+
+        /**
+         * Contains information about an APK's signer and any errors encountered while parsing the
+         * corresponding signature block.
+         */
+        public static class SignerInfo {
+            private X509Certificate mSigningCertificate;
+            private final List<ApkVerificationIssue> mErrors = new ArrayList<>();
+            private final List<ApkVerificationIssue> mWarnings = new ArrayList<>();
+
+            void setSigningCertificate(X509Certificate signingCertificate) {
+                mSigningCertificate = signingCertificate;
+            }
+
+            void addVerificationError(int errorId, Object... params) {
+                mErrors.add(new ApkVerificationIssue(errorId, params));
+            }
+
+            void addVerificationWarning(int warningId, Object... params) {
+                mWarnings.add(new ApkVerificationIssue(warningId, params));
+            }
+
+            /**
+             * Returns the current signing certificate used by this signer.
+             */
+            public X509Certificate getSigningCertificate() {
+                return mSigningCertificate;
+            }
+
+            /**
+             * Returns a {@link List} of {@link ApkVerificationIssue} objects representing errors
+             * encountered during processing of this signer's signature block.
+             */
+            public List<ApkVerificationIssue> getErrors() {
+                return mErrors;
+            }
+
+            /**
+             * Returns a {@link List} of {@link ApkVerificationIssue} objects representing warnings
+             * encountered during processing of this signer's signature block.
+             */
+            public List<ApkVerificationIssue> getWarnings() {
+                return mWarnings;
+            }
+
+            /**
+             * Returns {@code true} if any errors were encountered while parsing this signer's
+             * signature block.
+             */
+            public boolean containsErrors() {
+                return !mErrors.isEmpty();
+            }
+        }
+
+        /**
+         * Contains information about an APK's source stamp and any errors encountered while
+         * parsing the stamp signature block.
+         */
+        public static class SourceStampInfo {
+            private final List<X509Certificate> mCertificates;
+            private final List<X509Certificate> mCertificateLineage;
+
+            private final List<ApkVerificationIssue> mErrors = new ArrayList<>();
+            private final List<ApkVerificationIssue> mWarnings = new ArrayList<>();
+
+            /*
+             * Since this utility is intended just to verify the source stamp, and the source stamp
+             * currently only logs warnings to prevent failing the APK signature verification, treat
+             * all warnings as errors. If the stamp verification is updated to log errors this
+             * should be set to false to ensure only errors trigger a failure verifying the source
+             * stamp.
+             */
+            private static final boolean mWarningsAsErrors = true;
+
+            private SourceStampInfo(ApkSignerInfo result) {
+                mCertificates = result.certs;
+                mCertificateLineage = result.certificateLineage;
+                mErrors.addAll(result.getErrors());
+                mWarnings.addAll(result.getWarnings());
+            }
+
+            /**
+             * Returns the SourceStamp's signing certificate or {@code null} if not available. The
+             * certificate is guaranteed to be available if no errors were encountered during
+             * verification (see {@link #containsErrors()}.
+             *
+             * <p>This certificate contains the SourceStamp's public key.
+             */
+            public X509Certificate getCertificate() {
+                return mCertificates.isEmpty() ? null : mCertificates.get(0);
+            }
+
+            /**
+             * Returns a {@code List} of {@link X509Certificate} instances representing the source
+             * stamp signer's lineage with the oldest signer at element 0, or an empty {@code List}
+             * if the stamp's signing certificate has not been rotated.
+             */
+            public List<X509Certificate> getCertificatesInLineage() {
+                return mCertificateLineage;
+            }
+
+            /**
+             * Returns whether any errors were encountered during the source stamp verification.
+             */
+            public boolean containsErrors() {
+                return !mErrors.isEmpty() || (mWarningsAsErrors && !mWarnings.isEmpty());
+            }
+
+            /**
+             * Returns a {@code List} of {@link ApkVerificationIssue} representing errors that were
+             * encountered during source stamp verification.
+             */
+            public List<ApkVerificationIssue> getErrors() {
+                if (!mWarningsAsErrors) {
+                    return mErrors;
+                }
+                List<ApkVerificationIssue> result = new ArrayList<>();
+                result.addAll(mErrors);
+                result.addAll(mWarnings);
+                return result;
+            }
+
+            /**
+             * Returns a {@code List} of {@link ApkVerificationIssue} representing warnings that
+             * were encountered during source stamp verification.
+             */
+            public List<ApkVerificationIssue> getWarnings() {
+                return mWarnings;
+            }
+        }
+    }
+
+    /**
+     * Builder of {@link SourceStampVerifier} instances.
+     *
+     * <p> The resulting verifier, by default, checks whether the APK's source stamp signature will
+     * verify on all platform versions. The APK's {@code android:minSdkVersion} attribute is not
+     * queried to determine the APK's minimum supported level, so the caller should specify a lower
+     * bound with {@link #setMinCheckedPlatformVersion(int)}.
+     */
+    public static class Builder {
+        private final File mApkFile;
+        private final DataSource mApkDataSource;
+
+        private int mMinSdkVersion = 1;
+        private int mMaxSdkVersion = Integer.MAX_VALUE;
+
+        /**
+         * Constructs a new {@code Builder} for source stamp verification of the provided {@code
+         * apk}.
+         */
+        public Builder(File apk) {
+            if (apk == null) {
+                throw new NullPointerException("apk == null");
+            }
+            mApkFile = apk;
+            mApkDataSource = null;
+        }
+
+        /**
+         * Constructs a new {@code Builder} for source stamp verification of the provided {@code
+         * apk}.
+         */
+        public Builder(DataSource apk) {
+            if (apk == null) {
+                throw new NullPointerException("apk == null");
+            }
+            mApkDataSource = apk;
+            mApkFile = null;
+        }
+
+        /**
+         * Sets the oldest Android platform version for which the APK's source stamp is verified.
+         *
+         * <p>APK source stamp verification will confirm that the APK's stamp is expected to verify
+         * on all Android platforms starting from the platform version with the provided {@code
+         * minSdkVersion}. The upper end of the platform versions range can be modified via
+         * {@link #setMaxCheckedPlatformVersion(int)}.
+         *
+         * @param minSdkVersion API Level of the oldest platform for which to verify the APK
+         */
+        public SourceStampVerifier.Builder setMinCheckedPlatformVersion(int minSdkVersion) {
+            mMinSdkVersion = minSdkVersion;
+            return this;
+        }
+
+        /**
+         * Sets the newest Android platform version for which the APK's source stamp  is verified.
+         *
+         * <p>APK source stamp verification will confirm that the APK's stamp is expected to verify
+         * on all platform versions up to and including the proviced {@code maxSdkVersion}. The
+         * lower end of the platform versions range can be modified via {@link
+         * #setMinCheckedPlatformVersion(int)}.
+         *
+         * @param maxSdkVersion API Level of the newest platform for which to verify the APK
+         * @see #setMinCheckedPlatformVersion(int)
+         */
+        public SourceStampVerifier.Builder setMaxCheckedPlatformVersion(int maxSdkVersion) {
+            mMaxSdkVersion = maxSdkVersion;
+            return this;
+        }
+
+        /**
+         * Returns a {@link SourceStampVerifier} initialized according to the configuration of this
+         * builder.
+         */
+        public SourceStampVerifier build() {
+            return new SourceStampVerifier(
+                    mApkFile,
+                    mApkDataSource,
+                    mMinSdkVersion,
+                    mMaxSdkVersion);
+        }
+    }
+}

app/src/main/java/com/android/apksig/apk/ApkFormatException.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig.apk;
+
+/**
+ * Indicates that an APK is not well-formed. For example, this may indicate that the APK is not a
+ * well-formed ZIP archive, in which case {@link #getCause()} will return a
+ * {@link com.android.apksig.zip.ZipFormatException ZipFormatException}, or that the APK contains
+ * multiple ZIP entries with the same name.
+ */
+public class ApkFormatException extends Exception {
+    private static final long serialVersionUID = 1L;
+
+    public ApkFormatException(String message) {
+        super(message);
+    }
+
+    public ApkFormatException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

app/src/main/java/com/android/apksig/apk/ApkSigningBlockNotFoundException.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig.apk;
+
+/**
+ * Indicates that no APK Signing Block was found in an APK.
+ */
+public class ApkSigningBlockNotFoundException extends Exception {
+    private static final long serialVersionUID = 1L;
+
+    public ApkSigningBlockNotFoundException(String message) {
+        super(message);
+    }
+
+    public ApkSigningBlockNotFoundException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

app/src/main/java/com/android/apksig/apk/ApkUtils.java

@@ -0,0 +1,670 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig.apk;
+
+import com.android.apksig.internal.apk.AndroidBinXmlParser;
+import com.android.apksig.internal.apk.stamp.SourceStampConstants;
+import com.android.apksig.internal.apk.v1.V1SchemeVerifier;
+import com.android.apksig.internal.util.Pair;
+import com.android.apksig.internal.zip.CentralDirectoryRecord;
+import com.android.apksig.internal.zip.LocalFileRecord;
+import com.android.apksig.internal.zip.ZipUtils;
+import com.android.apksig.util.DataSource;
+import com.android.apksig.zip.ZipFormatException;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ * APK utilities.
+ */
+public abstract class ApkUtils {
+
+    /**
+     * Name of the Android manifest ZIP entry in APKs.
+     */
+    public static final String ANDROID_MANIFEST_ZIP_ENTRY_NAME = "AndroidManifest.xml";
+
+    /** Name of the SourceStamp certificate hash ZIP entry in APKs. */
+    public static final String SOURCE_STAMP_CERTIFICATE_HASH_ZIP_ENTRY_NAME =
+            SourceStampConstants.SOURCE_STAMP_CERTIFICATE_HASH_ZIP_ENTRY_NAME;
+
+    private ApkUtils() {}
+
+    /**
+     * Finds the main ZIP sections of the provided APK.
+     *
+     * @throws IOException if an I/O error occurred while reading the APK
+     * @throws ZipFormatException if the APK is malformed
+     */
+    public static ZipSections findZipSections(DataSource apk)
+            throws IOException, ZipFormatException {
+        com.android.apksig.zip.ZipSections zipSections = ApkUtilsLite.findZipSections(apk);
+        return new ZipSections(
+                zipSections.getZipCentralDirectoryOffset(),
+                zipSections.getZipCentralDirectorySizeBytes(),
+                zipSections.getZipCentralDirectoryRecordCount(),
+                zipSections.getZipEndOfCentralDirectoryOffset(),
+                zipSections.getZipEndOfCentralDirectory());
+    }
+
+    /**
+     * Information about the ZIP sections of an APK.
+     */
+    public static class ZipSections extends com.android.apksig.zip.ZipSections {
+        public ZipSections(
+                long centralDirectoryOffset,
+                long centralDirectorySizeBytes,
+                int centralDirectoryRecordCount,
+                long eocdOffset,
+                ByteBuffer eocd) {
+            super(centralDirectoryOffset, centralDirectorySizeBytes, centralDirectoryRecordCount,
+                    eocdOffset, eocd);
+        }
+    }
+
+    /**
+     * Sets the offset of the start of the ZIP Central Directory in the APK's ZIP End of Central
+     * Directory record.
+     *
+     * @param zipEndOfCentralDirectory APK's ZIP End of Central Directory record
+     * @param offset offset of the ZIP Central Directory relative to the start of the archive. Must
+     *        be between {@code 0} and {@code 2^32 - 1} inclusive.
+     */
+    public static void setZipEocdCentralDirectoryOffset(
+            ByteBuffer zipEndOfCentralDirectory, long offset) {
+        ByteBuffer eocd = zipEndOfCentralDirectory.slice();
+        eocd.order(ByteOrder.LITTLE_ENDIAN);
+        ZipUtils.setZipEocdCentralDirectoryOffset(eocd, offset);
+    }
+
+    /**
+     * Updates the length of EOCD comment.
+     *
+     * @param zipEndOfCentralDirectory APK's ZIP End of Central Directory record
+     */
+    public static void updateZipEocdCommentLen(ByteBuffer zipEndOfCentralDirectory) {
+        ByteBuffer eocd = zipEndOfCentralDirectory.slice();
+        eocd.order(ByteOrder.LITTLE_ENDIAN);
+        ZipUtils.updateZipEocdCommentLen(eocd);
+    }
+
+    /**
+     * Returns the APK Signing Block of the provided {@code apk}.
+     *
+     * @throws ApkFormatException if the APK is not a valid ZIP archive
+     * @throws IOException if an I/O error occurs
+     * @throws ApkSigningBlockNotFoundException if there is no APK Signing Block in the APK
+     *
+     * @see <a href="https://source.android.com/security/apksigning/v2.html">APK Signature Scheme v2
+     * </a>
+     */
+    public static ApkSigningBlock findApkSigningBlock(DataSource apk)
+            throws ApkFormatException, IOException, ApkSigningBlockNotFoundException {
+        ApkUtils.ZipSections inputZipSections;
+        try {
+            inputZipSections = ApkUtils.findZipSections(apk);
+        } catch (ZipFormatException e) {
+            throw new ApkFormatException("Malformed APK: not a ZIP archive", e);
+        }
+        return findApkSigningBlock(apk, inputZipSections);
+    }
+
+    /**
+     * Returns the APK Signing Block of the provided APK.
+     *
+     * @throws IOException if an I/O error occurs
+     * @throws ApkSigningBlockNotFoundException if there is no APK Signing Block in the APK
+     *
+     * @see <a href="https://source.android.com/security/apksigning/v2.html">APK Signature Scheme v2
+     * </a>
+     */
+    public static ApkSigningBlock findApkSigningBlock(DataSource apk, ZipSections zipSections)
+            throws IOException, ApkSigningBlockNotFoundException {
+        ApkUtilsLite.ApkSigningBlock apkSigningBlock = ApkUtilsLite.findApkSigningBlock(apk,
+                zipSections);
+        return new ApkSigningBlock(apkSigningBlock.getStartOffset(), apkSigningBlock.getContents());
+    }
+
+    /**
+     * Information about the location of the APK Signing Block inside an APK.
+     */
+    public static class ApkSigningBlock extends ApkUtilsLite.ApkSigningBlock {
+        /**
+         * Constructs a new {@code ApkSigningBlock}.
+         *
+         * @param startOffsetInApk start offset (in bytes, relative to start of file) of the APK
+         *        Signing Block inside the APK file
+         * @param contents contents of the APK Signing Block
+         */
+        public ApkSigningBlock(long startOffsetInApk, DataSource contents) {
+            super(startOffsetInApk, contents);
+        }
+    }
+
+    /**
+     * Returns the contents of the APK's {@code AndroidManifest.xml}.
+     *
+     * @throws IOException if an I/O error occurs while reading the APK
+     * @throws ApkFormatException if the APK is malformed
+     */
+    public static ByteBuffer getAndroidManifest(DataSource apk)
+            throws IOException, ApkFormatException {
+        ZipSections zipSections;
+        try {
+            zipSections = findZipSections(apk);
+        } catch (ZipFormatException e) {
+            throw new ApkFormatException("Not a valid ZIP archive", e);
+        }
+        List<CentralDirectoryRecord> cdRecords =
+                V1SchemeVerifier.parseZipCentralDirectory(apk, zipSections);
+        CentralDirectoryRecord androidManifestCdRecord = null;
+        for (CentralDirectoryRecord cdRecord : cdRecords) {
+            if (ANDROID_MANIFEST_ZIP_ENTRY_NAME.equals(cdRecord.getName())) {
+                androidManifestCdRecord = cdRecord;
+                break;
+            }
+        }
+        if (androidManifestCdRecord == null) {
+            throw new ApkFormatException("Missing " + ANDROID_MANIFEST_ZIP_ENTRY_NAME);
+        }
+        DataSource lfhSection = apk.slice(0, zipSections.getZipCentralDirectoryOffset());
+
+        try {
+            return ByteBuffer.wrap(
+                    LocalFileRecord.getUncompressedData(
+                            lfhSection, androidManifestCdRecord, lfhSection.size()));
+        } catch (ZipFormatException e) {
+            throw new ApkFormatException("Failed to read " + ANDROID_MANIFEST_ZIP_ENTRY_NAME, e);
+        }
+    }
+
+    /**
+     * Android resource ID of the {@code android:minSdkVersion} attribute in AndroidManifest.xml.
+     */
+    private static final int MIN_SDK_VERSION_ATTR_ID = 0x0101020c;
+
+    /**
+     * Android resource ID of the {@code android:debuggable} attribute in AndroidManifest.xml.
+     */
+    private static final int DEBUGGABLE_ATTR_ID = 0x0101000f;
+
+    /**
+     * Android resource ID of the {@code android:targetSandboxVersion} attribute in
+     * AndroidManifest.xml.
+     */
+    private static final int TARGET_SANDBOX_VERSION_ATTR_ID = 0x0101054c;
+
+    /**
+     * Android resource ID of the {@code android:targetSdkVersion} attribute in
+     * AndroidManifest.xml.
+     */
+    private static final int TARGET_SDK_VERSION_ATTR_ID = 0x01010270;
+    private static final String USES_SDK_ELEMENT_TAG = "uses-sdk";
+
+    /**
+     * Android resource ID of the {@code android:versionCode} attribute in AndroidManifest.xml.
+     */
+    private static final int VERSION_CODE_ATTR_ID = 0x0101021b;
+    private static final String MANIFEST_ELEMENT_TAG = "manifest";
+
+    /**
+     * Android resource ID of the {@code android:versionCodeMajor} attribute in AndroidManifest.xml.
+     */
+    private static final int VERSION_CODE_MAJOR_ATTR_ID = 0x01010576;
+
+    /**
+     * Returns the lowest Android platform version (API Level) supported by an APK with the
+     * provided {@code AndroidManifest.xml}.
+     *
+     * @param androidManifestContents contents of {@code AndroidManifest.xml} in binary Android
+     *        resource format
+     *
+     * @throws MinSdkVersionException if an error occurred while determining the API Level
+     */
+    public static int getMinSdkVersionFromBinaryAndroidManifest(
+            ByteBuffer androidManifestContents) throws MinSdkVersionException {
+        // IMPLEMENTATION NOTE: Minimum supported Android platform version number is declared using
+        // uses-sdk elements which are children of the top-level manifest element. uses-sdk element
+        // declares the minimum supported platform version using the android:minSdkVersion attribute
+        // whose default value is 1.
+        // For each encountered uses-sdk element, the Android runtime checks that its minSdkVersion
+        // is not higher than the runtime's API Level and rejects APKs if it is higher. Thus, the
+        // effective minSdkVersion value is the maximum over the encountered minSdkVersion values.
+
+        try {
+            // If no uses-sdk elements are encountered, Android accepts the APK. We treat this
+            // scenario as though the minimum supported API Level is 1.
+            int result = 1;
+
+            AndroidBinXmlParser parser = new AndroidBinXmlParser(androidManifestContents);
+            int eventType = parser.getEventType();
+            while (eventType != AndroidBinXmlParser.EVENT_END_DOCUMENT) {
+                if ((eventType == AndroidBinXmlParser.EVENT_START_ELEMENT)
+                        && (parser.getDepth() == 2)
+                        && ("uses-sdk".equals(parser.getName()))
+                        && (parser.getNamespace().isEmpty())) {
+                    // In each uses-sdk element, minSdkVersion defaults to 1
+                    int minSdkVersion = 1;
+                    for (int i = 0; i < parser.getAttributeCount(); i++) {
+                        if (parser.getAttributeNameResourceId(i) == MIN_SDK_VERSION_ATTR_ID) {
+                            int valueType = parser.getAttributeValueType(i);
+                            switch (valueType) {
+                                case AndroidBinXmlParser.VALUE_TYPE_INT:
+                                    minSdkVersion = parser.getAttributeIntValue(i);
+                                    break;
+                                case AndroidBinXmlParser.VALUE_TYPE_STRING:
+                                    minSdkVersion =
+                                            getMinSdkVersionForCodename(
+                                                    parser.getAttributeStringValue(i));
+                                    break;
+                                default:
+                                    throw new MinSdkVersionException(
+                                            "Unable to determine APK's minimum supported Android"
+                                                    + ": unsupported value type in "
+                                                    + ANDROID_MANIFEST_ZIP_ENTRY_NAME + "'s"
+                                                    + " minSdkVersion"
+                                                    + ". Only integer values supported.");
+                            }
+                            break;
+                        }
+                    }
+                    result = Math.max(result, minSdkVersion);
+                }
+                eventType = parser.next();
+            }
+
+            return result;
+        } catch (AndroidBinXmlParser.XmlParserException e) {
+            throw new MinSdkVersionException(
+                    "Unable to determine APK's minimum supported Android platform version"
+                            + ": malformed binary resource: " + ANDROID_MANIFEST_ZIP_ENTRY_NAME,
+                    e);
+        }
+    }
+
+    private static class CodenamesLazyInitializer {
+
+        /**
+         * List of platform codename (first letter of) to API Level mappings. The list must be
+         * sorted by the first letter. For codenames not in the list, the assumption is that the API
+         * Level is incremented by one for every increase in the codename's first letter.
+         */
+        @SuppressWarnings({"rawtypes", "unchecked"})
+        private static final Pair<Character, Integer>[] SORTED_CODENAMES_FIRST_CHAR_TO_API_LEVEL =
+                new Pair[] {
+            Pair.of('C', 2),
+            Pair.of('D', 3),
+            Pair.of('E', 4),
+            Pair.of('F', 7),
+            Pair.of('G', 8),
+            Pair.of('H', 10),
+            Pair.of('I', 13),
+            Pair.of('J', 15),
+            Pair.of('K', 18),
+            Pair.of('L', 20),
+            Pair.of('M', 22),
+            Pair.of('N', 23),
+            Pair.of('O', 25),
+        };
+
+        private static final Comparator<Pair<Character, Integer>> CODENAME_FIRST_CHAR_COMPARATOR =
+                new ByFirstComparator();
+
+        private static class ByFirstComparator implements Comparator<Pair<Character, Integer>> {
+            @Override
+            public int compare(Pair<Character, Integer> o1, Pair<Character, Integer> o2) {
+                char c1 = o1.getFirst();
+                char c2 = o2.getFirst();
+                return c1 - c2;
+            }
+        }
+    }
+
+    /**
+     * Returns the API Level corresponding to the provided platform codename.
+     *
+     * <p>This method is pessimistic. It returns a value one lower than the API Level with which the
+     * platform is actually released (e.g., 23 for N which was released as API Level 24). This is
+     * because new features which first appear in an API Level are not available in the early days
+     * of that platform version's existence, when the platform only has a codename. Moreover, this
+     * method currently doesn't differentiate between initial and MR releases, meaning API Level
+     * returned for MR releases may be more than one lower than the API Level with which the
+     * platform version is actually released.
+     *
+     * @throws CodenameMinSdkVersionException if the {@code codename} is not supported
+     */
+    static int getMinSdkVersionForCodename(String codename) throws CodenameMinSdkVersionException {
+        char firstChar = codename.isEmpty() ? ' ' : codename.charAt(0);
+        // Codenames are case-sensitive. Only codenames starting with A-Z are supported for now.
+        // We only look at the first letter of the codename as this is the most important letter.
+        if ((firstChar >= 'A') && (firstChar <= 'Z')) {
+            Pair<Character, Integer>[] sortedCodenamesFirstCharToApiLevel =
+                    CodenamesLazyInitializer.SORTED_CODENAMES_FIRST_CHAR_TO_API_LEVEL;
+            int searchResult =
+                    Arrays.binarySearch(
+                            sortedCodenamesFirstCharToApiLevel,
+                            Pair.of(firstChar, null), // second element of the pair is ignored here
+                            CodenamesLazyInitializer.CODENAME_FIRST_CHAR_COMPARATOR);
+            if (searchResult >= 0) {
+                // Exact match -- searchResult is the index of the matching element
+                return sortedCodenamesFirstCharToApiLevel[searchResult].getSecond();
+            }
+            // Not an exact match -- searchResult is negative and is -(insertion index) - 1.
+            // The element at insertionIndex - 1 (if present) is smaller than firstChar and the
+            // element at insertionIndex (if present) is greater than firstChar.
+            int insertionIndex = -1 - searchResult; // insertionIndex is in [0; array length]
+            if (insertionIndex == 0) {
+                // 'A' or 'B' -- never released to public
+                return 1;
+            } else {
+                // The element at insertionIndex - 1 is the newest older codename.
+                // API Level bumped by at least 1 for every change in the first letter of codename
+                Pair<Character, Integer> newestOlderCodenameMapping =
+                        sortedCodenamesFirstCharToApiLevel[insertionIndex - 1];
+                char newestOlderCodenameFirstChar = newestOlderCodenameMapping.getFirst();
+                int newestOlderCodenameApiLevel = newestOlderCodenameMapping.getSecond();
+                return newestOlderCodenameApiLevel + (firstChar - newestOlderCodenameFirstChar);
+            }
+        }
+
+        throw new CodenameMinSdkVersionException(
+                "Unable to determine APK's minimum supported Android platform version"
+                        + " : Unsupported codename in " + ANDROID_MANIFEST_ZIP_ENTRY_NAME
+                        + "'s minSdkVersion: \"" + codename + "\"",
+                codename);
+    }
+
+    /**
+     * Returns {@code true} if the APK is debuggable according to its {@code AndroidManifest.xml}.
+     * See the {@code android:debuggable} attribute of the {@code application} element.
+     *
+     * @param androidManifestContents contents of {@code AndroidManifest.xml} in binary Android
+     *        resource format
+     *
+     * @throws ApkFormatException if the manifest is malformed
+     */
+    public static boolean getDebuggableFromBinaryAndroidManifest(
+            ByteBuffer androidManifestContents) throws ApkFormatException {
+        // IMPLEMENTATION NOTE: Whether the package is debuggable is declared using the first
+        // "application" element which is a child of the top-level manifest element. The debuggable
+        // attribute of this application element is coerced to a boolean value. If there is no
+        // application element or if it doesn't declare the debuggable attribute, the package is
+        // considered not debuggable.
+
+        try {
+            AndroidBinXmlParser parser = new AndroidBinXmlParser(androidManifestContents);
+            int eventType = parser.getEventType();
+            while (eventType != AndroidBinXmlParser.EVENT_END_DOCUMENT) {
+                if ((eventType == AndroidBinXmlParser.EVENT_START_ELEMENT)
+                        && (parser.getDepth() == 2)
+                        && ("application".equals(parser.getName()))
+                        && (parser.getNamespace().isEmpty())) {
+                    for (int i = 0; i < parser.getAttributeCount(); i++) {
+                        if (parser.getAttributeNameResourceId(i) == DEBUGGABLE_ATTR_ID) {
+                            int valueType = parser.getAttributeValueType(i);
+                            switch (valueType) {
+                                case AndroidBinXmlParser.VALUE_TYPE_BOOLEAN:
+                                case AndroidBinXmlParser.VALUE_TYPE_STRING:
+                                case AndroidBinXmlParser.VALUE_TYPE_INT:
+                                    String value = parser.getAttributeStringValue(i);
+                                    return ("true".equals(value))
+                                            || ("TRUE".equals(value))
+                                            || ("1".equals(value));
+                                case AndroidBinXmlParser.VALUE_TYPE_REFERENCE:
+                                    // References to resources are not supported on purpose. The
+                                    // reason is that the resolved value depends on the resource
+                                    // configuration (e.g, MNC/MCC, locale, screen density) used
+                                    // at resolution time. As a result, the same APK may appear as
+                                    // debuggable in one situation and as non-debuggable in another
+                                    // situation. Such APKs may put users at risk.
+                                    throw new ApkFormatException(
+                                            "Unable to determine whether APK is debuggable"
+                                                    + ": " + ANDROID_MANIFEST_ZIP_ENTRY_NAME + "'s"
+                                                    + " android:debuggable attribute references a"
+                                                    + " resource. References are not supported for"
+                                                    + " security reasons. Only constant boolean,"
+                                                    + " string and int values are supported.");
+                                default:
+                                    throw new ApkFormatException(
+                                            "Unable to determine whether APK is debuggable"
+                                                    + ": " + ANDROID_MANIFEST_ZIP_ENTRY_NAME + "'s"
+                                                    + " android:debuggable attribute uses"
+                                                    + " unsupported value type. Only boolean,"
+                                                    + " string and int values are supported.");
+                            }
+                        }
+                    }
+                    // This application element does not declare the debuggable attribute
+                    return false;
+                }
+                eventType = parser.next();
+            }
+
+            // No application element found
+            return false;
+        } catch (AndroidBinXmlParser.XmlParserException e) {
+            throw new ApkFormatException(
+                    "Unable to determine whether APK is debuggable: malformed binary resource: "
+                            + ANDROID_MANIFEST_ZIP_ENTRY_NAME,
+                    e);
+        }
+    }
+
+    /**
+     * Returns the package name of the APK according to its {@code AndroidManifest.xml} or
+     * {@code null} if package name is not declared. See the {@code package} attribute of the
+     * {@code manifest} element.
+     *
+     * @param androidManifestContents contents of {@code AndroidManifest.xml} in binary Android
+     *        resource format
+     *
+     * @throws ApkFormatException if the manifest is malformed
+     */
+    public static String getPackageNameFromBinaryAndroidManifest(
+            ByteBuffer androidManifestContents) throws ApkFormatException {
+        // IMPLEMENTATION NOTE: Package name is declared as the "package" attribute of the top-level
+        // manifest element. Interestingly, as opposed to most other attributes, Android Package
+        // Manager looks up this attribute by its name rather than by its resource ID.
+
+        try {
+            AndroidBinXmlParser parser = new AndroidBinXmlParser(androidManifestContents);
+            int eventType = parser.getEventType();
+            while (eventType != AndroidBinXmlParser.EVENT_END_DOCUMENT) {
+                if ((eventType == AndroidBinXmlParser.EVENT_START_ELEMENT)
+                        && (parser.getDepth() == 1)
+                        && ("manifest".equals(parser.getName()))
+                        && (parser.getNamespace().isEmpty())) {
+                    for (int i = 0; i < parser.getAttributeCount(); i++) {
+                        if ("package".equals(parser.getAttributeName(i))
+                                && (parser.getNamespace().isEmpty())) {
+                            return parser.getAttributeStringValue(i);
+                        }
+                    }
+                    // No "package" attribute found
+                    return null;
+                }
+                eventType = parser.next();
+            }
+
+            // No manifest element found
+            return null;
+        } catch (AndroidBinXmlParser.XmlParserException e) {
+            throw new ApkFormatException(
+                    "Unable to determine APK package name: malformed binary resource: "
+                            + ANDROID_MANIFEST_ZIP_ENTRY_NAME,
+                    e);
+        }
+    }
+
+    /**
+     * Returns the security sandbox version targeted by an APK with the provided
+     * {@code AndroidManifest.xml}.
+     *
+     * <p>If the security sandbox version is not specified in the manifest a default value of 1 is
+     * returned.
+     *
+     * @param androidManifestContents contents of {@code AndroidManifest.xml} in binary Android
+     *                                resource format
+     */
+    public static int getTargetSandboxVersionFromBinaryAndroidManifest(
+            ByteBuffer androidManifestContents) {
+        try {
+            return getAttributeValueFromBinaryAndroidManifest(androidManifestContents,
+                    MANIFEST_ELEMENT_TAG, TARGET_SANDBOX_VERSION_ATTR_ID);
+        } catch (ApkFormatException e) {
+            // An ApkFormatException indicates the target sandbox is not specified in the manifest;
+            // return a default value of 1.
+            return 1;
+        }
+    }
+
+    /**
+     * Returns the SDK version targeted by an APK with the provided {@code AndroidManifest.xml}.
+     *
+     * <p>If the targetSdkVersion is not specified the minimumSdkVersion is returned. If neither
+     * value is specified then a value of 1 is returned.
+     *
+     * @param androidManifestContents contents of {@code AndroidManifest.xml} in binary Android
+     *                                resource format
+     */
+    public static int getTargetSdkVersionFromBinaryAndroidManifest(
+            ByteBuffer androidManifestContents) {
+        // If the targetSdkVersion is not specified then the platform will use the value of the
+        // minSdkVersion; if neither is specified then the platform will use a value of 1.
+        int minSdkVersion = 1;
+        try {
+            return getAttributeValueFromBinaryAndroidManifest(androidManifestContents,
+                    USES_SDK_ELEMENT_TAG, TARGET_SDK_VERSION_ATTR_ID);
+        } catch (ApkFormatException e) {
+            // Expected if the APK does not contain a targetSdkVersion attribute or the uses-sdk
+            // element is not specified at all.
+        }
+        androidManifestContents.rewind();
+        try {
+            minSdkVersion = getMinSdkVersionFromBinaryAndroidManifest(androidManifestContents);
+        } catch (ApkFormatException e) {
+            // Similar to above, expected if the APK does not contain a minSdkVersion attribute, or
+            // the uses-sdk element is not specified at all.
+        }
+        return minSdkVersion;
+    }
+
+    /**
+     * Returns the versionCode of the APK according to its {@code AndroidManifest.xml}.
+     *
+     * <p>If the versionCode is not specified in the {@code AndroidManifest.xml} or is not a valid
+     * integer an ApkFormatException is thrown.
+     *
+     * @param androidManifestContents contents of {@code AndroidManifest.xml} in binary Android
+     *                                resource format
+     * @throws ApkFormatException if an error occurred while determining the versionCode, or if the
+     *                            versionCode attribute value is not available.
+     */
+    public static int getVersionCodeFromBinaryAndroidManifest(ByteBuffer androidManifestContents)
+            throws ApkFormatException {
+        return getAttributeValueFromBinaryAndroidManifest(androidManifestContents,
+                MANIFEST_ELEMENT_TAG, VERSION_CODE_ATTR_ID);
+    }
+
+    /**
+     * Returns the versionCode and versionCodeMajor of the APK according to its {@code
+     * AndroidManifest.xml} combined together as a single long value.
+     *
+     * <p>The versionCodeMajor is placed in the upper 32 bits, and the versionCode is in the lower
+     * 32 bits. If the versionCodeMajor is not specified then the versionCode is returned.
+     *
+     * @param androidManifestContents contents of {@code AndroidManifest.xml} in binary Android
+     *                                resource format
+     * @throws ApkFormatException if an error occurred while determining the version, or if the
+     *                            versionCode attribute value is not available.
+     */
+    public static long getLongVersionCodeFromBinaryAndroidManifest(
+            ByteBuffer androidManifestContents) throws ApkFormatException {
+        // If the versionCode is not found then allow the ApkFormatException to be thrown to notify
+        // the caller that the versionCode is not available.
+        int versionCode = getVersionCodeFromBinaryAndroidManifest(androidManifestContents);
+        long versionCodeMajor = 0;
+        try {
+            androidManifestContents.rewind();
+            versionCodeMajor = getAttributeValueFromBinaryAndroidManifest(androidManifestContents,
+                    MANIFEST_ELEMENT_TAG, VERSION_CODE_MAJOR_ATTR_ID);
+        } catch (ApkFormatException e) {
+            // This is expected if the versionCodeMajor has not been defined for the APK; in this
+            // case the return value is just the versionCode.
+        }
+        return (versionCodeMajor << 32) | versionCode;
+    }
+
+    /**
+     * Returns the integer value of the requested {@code attributeId} in the specified {@code
+     * elementName} from the provided {@code androidManifestContents} in binary Android resource
+     * format.
+     *
+     * @throws ApkFormatException if an error occurred while attempting to obtain the attribute, or
+     *                            if the requested attribute is not found.
+     */
+    private static int getAttributeValueFromBinaryAndroidManifest(
+            ByteBuffer androidManifestContents, String elementName, int attributeId)
+            throws ApkFormatException {
+        if (elementName == null) {
+            throw new NullPointerException("elementName cannot be null");
+        }
+        try {
+            AndroidBinXmlParser parser = new AndroidBinXmlParser(androidManifestContents);
+            int eventType = parser.getEventType();
+            while (eventType != AndroidBinXmlParser.EVENT_END_DOCUMENT) {
+                if ((eventType == AndroidBinXmlParser.EVENT_START_ELEMENT)
+                        && (elementName.equals(parser.getName()))) {
+                    for (int i = 0; i < parser.getAttributeCount(); i++) {
+                        if (parser.getAttributeNameResourceId(i) == attributeId) {
+                            int valueType = parser.getAttributeValueType(i);
+                            switch (valueType) {
+                                case AndroidBinXmlParser.VALUE_TYPE_INT:
+                                case AndroidBinXmlParser.VALUE_TYPE_STRING:
+                                    return parser.getAttributeIntValue(i);
+                                default:
+                                    throw new ApkFormatException(
+                                            "Unsupported value type, " + valueType
+                                                    + ", for attribute " + String.format("0x%08X",
+                                                    attributeId) + " under element " + elementName);
+
+                            }
+                        }
+                    }
+                }
+                eventType = parser.next();
+            }
+            throw new ApkFormatException(
+                    "Failed to determine APK's " + elementName + " attribute "
+                            + String.format("0x%08X", attributeId) + " value");
+        } catch (AndroidBinXmlParser.XmlParserException e) {
+            throw new ApkFormatException(
+                    "Unable to determine value for attribute " + String.format("0x%08X",
+                            attributeId) + " under element " + elementName
+                            + "; malformed binary resource: " + ANDROID_MANIFEST_ZIP_ENTRY_NAME, e);
+        }
+    }
+
+    public static byte[] computeSha256DigestBytes(byte[] data) {
+        return ApkUtilsLite.computeSha256DigestBytes(data);
+    }
+}

app/src/main/java/com/android/apksig/apk/ApkUtilsLite.java

@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig.apk;
+
+import com.android.apksig.internal.util.Pair;
+import com.android.apksig.internal.zip.ZipUtils;
+import com.android.apksig.util.DataSource;
+import com.android.apksig.zip.ZipFormatException;
+import com.android.apksig.zip.ZipSections;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Lightweight version of the ApkUtils for clients that only require a subset of the utility
+ * functionality.
+ */
+public class ApkUtilsLite {
+    private ApkUtilsLite() {}
+
+    /**
+     * Finds the main ZIP sections of the provided APK.
+     *
+     * @throws IOException if an I/O error occurred while reading the APK
+     * @throws ZipFormatException if the APK is malformed
+     */
+    public static ZipSections findZipSections(DataSource apk)
+            throws IOException, ZipFormatException {
+        Pair<ByteBuffer, Long> eocdAndOffsetInFile =
+                ZipUtils.findZipEndOfCentralDirectoryRecord(apk);
+        if (eocdAndOffsetInFile == null) {
+            throw new ZipFormatException("ZIP End of Central Directory record not found");
+        }
+
+        ByteBuffer eocdBuf = eocdAndOffsetInFile.getFirst();
+        long eocdOffset = eocdAndOffsetInFile.getSecond();
+        eocdBuf.order(ByteOrder.LITTLE_ENDIAN);
+        long cdStartOffset = ZipUtils.getZipEocdCentralDirectoryOffset(eocdBuf);
+        if (cdStartOffset > eocdOffset) {
+            throw new ZipFormatException(
+                    "ZIP Central Directory start offset out of range: " + cdStartOffset
+                            + ". ZIP End of Central Directory offset: " + eocdOffset);
+        }
+
+        long cdSizeBytes = ZipUtils.getZipEocdCentralDirectorySizeBytes(eocdBuf);
+        long cdEndOffset = cdStartOffset + cdSizeBytes;
+        if (cdEndOffset > eocdOffset) {
+            throw new ZipFormatException(
+                    "ZIP Central Directory overlaps with End of Central Directory"
+                            + ". CD end: " + cdEndOffset
+                            + ", EoCD start: " + eocdOffset);
+        }
+
+        int cdRecordCount = ZipUtils.getZipEocdCentralDirectoryTotalRecordCount(eocdBuf);
+
+        return new ZipSections(
+                cdStartOffset,
+                cdSizeBytes,
+                cdRecordCount,
+                eocdOffset,
+                eocdBuf);
+    }
+
+    // See https://source.android.com/security/apksigning/v2.html
+    private static final long APK_SIG_BLOCK_MAGIC_HI = 0x3234206b636f6c42L;
+    private static final long APK_SIG_BLOCK_MAGIC_LO = 0x20676953204b5041L;
+    private static final int APK_SIG_BLOCK_MIN_SIZE = 32;
+
+    /**
+     * Returns the APK Signing Block of the provided APK.
+     *
+     * @throws IOException if an I/O error occurs
+     * @throws ApkSigningBlockNotFoundException if there is no APK Signing Block in the APK
+     *
+     * @see <a href="https://source.android.com/security/apksigning/v2.html">APK Signature Scheme v2
+     * </a>
+     */
+    public static ApkSigningBlock findApkSigningBlock(DataSource apk, ZipSections zipSections)
+            throws IOException, ApkSigningBlockNotFoundException {
+        // FORMAT (see https://source.android.com/security/apksigning/v2.html):
+        // OFFSET       DATA TYPE  DESCRIPTION
+        // * @+0  bytes uint64:    size in bytes (excluding this field)
+        // * @+8  bytes payload
+        // * @-24 bytes uint64:    size in bytes (same as the one above)
+        // * @-16 bytes uint128:   magic
+
+        long centralDirStartOffset = zipSections.getZipCentralDirectoryOffset();
+        long centralDirEndOffset =
+                centralDirStartOffset + zipSections.getZipCentralDirectorySizeBytes();
+        long eocdStartOffset = zipSections.getZipEndOfCentralDirectoryOffset();
+        if (centralDirEndOffset != eocdStartOffset) {
+            throw new ApkSigningBlockNotFoundException(
+                    "ZIP Central Directory is not immediately followed by End of Central Directory"
+                            + ". CD end: " + centralDirEndOffset
+                            + ", EoCD start: " + eocdStartOffset);
+        }
+
+        if (centralDirStartOffset < APK_SIG_BLOCK_MIN_SIZE) {
+            throw new ApkSigningBlockNotFoundException(
+                    "APK too small for APK Signing Block. ZIP Central Directory offset: "
+                            + centralDirStartOffset);
+        }
+        // Read the magic and offset in file from the footer section of the block:
+        // * uint64:   size of block
+        // * 16 bytes: magic
+        ByteBuffer footer = apk.getByteBuffer(centralDirStartOffset - 24, 24);
+        footer.order(ByteOrder.LITTLE_ENDIAN);
+        if ((footer.getLong(8) != APK_SIG_BLOCK_MAGIC_LO)
+                || (footer.getLong(16) != APK_SIG_BLOCK_MAGIC_HI)) {
+            throw new ApkSigningBlockNotFoundException(
+                    "No APK Signing Block before ZIP Central Directory");
+        }
+        // Read and compare size fields
+        long apkSigBlockSizeInFooter = footer.getLong(0);
+        if ((apkSigBlockSizeInFooter < footer.capacity())
+                || (apkSigBlockSizeInFooter > Integer.MAX_VALUE - 8)) {
+            throw new ApkSigningBlockNotFoundException(
+                    "APK Signing Block size out of range: " + apkSigBlockSizeInFooter);
+        }
+        int totalSize = (int) (apkSigBlockSizeInFooter + 8);
+        long apkSigBlockOffset = centralDirStartOffset - totalSize;
+        if (apkSigBlockOffset < 0) {
+            throw new ApkSigningBlockNotFoundException(
+                    "APK Signing Block offset out of range: " + apkSigBlockOffset);
+        }
+        ByteBuffer apkSigBlock = apk.getByteBuffer(apkSigBlockOffset, 8);
+        apkSigBlock.order(ByteOrder.LITTLE_ENDIAN);
+        long apkSigBlockSizeInHeader = apkSigBlock.getLong(0);
+        if (apkSigBlockSizeInHeader != apkSigBlockSizeInFooter) {
+            throw new ApkSigningBlockNotFoundException(
+                    "APK Signing Block sizes in header and footer do not match: "
+                            + apkSigBlockSizeInHeader + " vs " + apkSigBlockSizeInFooter);
+        }
+        return new ApkSigningBlock(apkSigBlockOffset, apk.slice(apkSigBlockOffset, totalSize));
+    }
+
+    /**
+     * Information about the location of the APK Signing Block inside an APK.
+     */
+    public static class ApkSigningBlock {
+        private final long mStartOffsetInApk;
+        private final DataSource mContents;
+
+        /**
+         * Constructs a new {@code ApkSigningBlock}.
+         *
+         * @param startOffsetInApk start offset (in bytes, relative to start of file) of the APK
+         *        Signing Block inside the APK file
+         * @param contents contents of the APK Signing Block
+         */
+        public ApkSigningBlock(long startOffsetInApk, DataSource contents) {
+            mStartOffsetInApk = startOffsetInApk;
+            mContents = contents;
+        }
+
+        /**
+         * Returns the start offset (in bytes, relative to start of file) of the APK Signing Block.
+         */
+        public long getStartOffset() {
+            return mStartOffsetInApk;
+        }
+
+        /**
+         * Returns the data source which provides the full contents of the APK Signing Block,
+         * including its footer.
+         */
+        public DataSource getContents() {
+            return mContents;
+        }
+    }
+
+    public static byte[] computeSha256DigestBytes(byte[] data) {
+        MessageDigest messageDigest;
+        try {
+            messageDigest = MessageDigest.getInstance("SHA-256");
+        } catch (NoSuchAlgorithmException e) {
+            throw new IllegalStateException("SHA-256 is not found", e);
+        }
+        messageDigest.update(data);
+        return messageDigest.digest();
+    }
+}

app/src/main/java/com/android/apksig/apk/CodenameMinSdkVersionException.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig.apk;
+
+/**
+ * Indicates that there was an issue determining the minimum Android platform version supported by
+ * an APK because the version is specified as a codename, rather than as API Level number, and the
+ * codename is in an unexpected format.
+ */
+public class CodenameMinSdkVersionException extends MinSdkVersionException {
+
+    private static final long serialVersionUID = 1L;
+
+    /** Encountered codename. */
+    private final String mCodename;
+
+    /**
+     * Constructs a new {@code MinSdkVersionCodenameException} with the provided message and
+     * codename.
+     */
+    public CodenameMinSdkVersionException(String message, String codename) {
+        super(message);
+        mCodename = codename;
+    }
+
+    /**
+     * Returns the codename.
+     */
+    public String getCodename() {
+        return mCodename;
+    }
+}

app/src/main/java/com/android/apksig/apk/MinSdkVersionException.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig.apk;
+
+/**
+ * Indicates that there was an issue determining the minimum Android platform version supported by
+ * an APK.
+ */
+public class MinSdkVersionException extends ApkFormatException {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Constructs a new {@code MinSdkVersionException} with the provided message.
+     */
+    public MinSdkVersionException(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructs a new {@code MinSdkVersionException} with the provided message and cause.
+     */
+    public MinSdkVersionException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

app/src/main/java/com/android/apksig/internal/apk/AndroidBinXmlParser.java

@@ -0,0 +1,869 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig.internal.apk;
+
+import java.io.UnsupportedEncodingException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * XML pull style parser of Android binary XML resources, such as {@code AndroidManifest.xml}.
+ *
+ * <p>For an input document, the parser outputs an event stream (see {@code EVENT_... constants} via
+ * {@link #getEventType()} and {@link #next()} methods. Additional information about the current
+ * event can be obtained via an assortment of getters, for example, {@link #getName()} or
+ * {@link #getAttributeNameResourceId(int)}.
+ */
+public class AndroidBinXmlParser {
+
+    /** Event: start of document. */
+    public static final int EVENT_START_DOCUMENT = 1;
+
+    /** Event: end of document. */
+    public static final int EVENT_END_DOCUMENT = 2;
+
+    /** Event: start of an element. */
+    public static final int EVENT_START_ELEMENT = 3;
+
+    /** Event: end of an document. */
+    public static final int EVENT_END_ELEMENT = 4;
+
+    /** Attribute value type is not supported by this parser. */
+    public static final int VALUE_TYPE_UNSUPPORTED = 0;
+
+    /** Attribute value is a string. Use {@link #getAttributeStringValue(int)} to obtain it. */
+    public static final int VALUE_TYPE_STRING = 1;
+
+    /** Attribute value is an integer. Use {@link #getAttributeIntValue(int)} to obtain it. */
+    public static final int VALUE_TYPE_INT = 2;
+
+    /**
+     * Attribute value is a resource reference. Use {@link #getAttributeIntValue(int)} to obtain it.
+     */
+    public static final int VALUE_TYPE_REFERENCE = 3;
+
+    /** Attribute value is a boolean. Use {@link #getAttributeBooleanValue(int)} to obtain it. */
+    public static final int VALUE_TYPE_BOOLEAN = 4;
+
+    private static final long NO_NAMESPACE = 0xffffffffL;
+
+    private final ByteBuffer mXml;
+
+    private StringPool mStringPool;
+    private ResourceMap mResourceMap;
+    private int mDepth;
+    private int mCurrentEvent = EVENT_START_DOCUMENT;
+
+    private String mCurrentElementName;
+    private String mCurrentElementNamespace;
+    private int mCurrentElementAttributeCount;
+    private List<Attribute> mCurrentElementAttributes;
+    private ByteBuffer mCurrentElementAttributesContents;
+    private int mCurrentElementAttrSizeBytes;
+
+    /**
+     * Constructs a new parser for the provided document.
+     */
+    public AndroidBinXmlParser(ByteBuffer xml) throws XmlParserException {
+        xml.order(ByteOrder.LITTLE_ENDIAN);
+
+        Chunk resXmlChunk = null;
+        while (xml.hasRemaining()) {
+            Chunk chunk = Chunk.get(xml);
+            if (chunk == null) {
+                break;
+            }
+            if (chunk.getType() == Chunk.TYPE_RES_XML) {
+                resXmlChunk = chunk;
+                break;
+            }
+        }
+
+        if (resXmlChunk == null) {
+            throw new XmlParserException("No XML chunk in file");
+        }
+        mXml = resXmlChunk.getContents();
+    }
+
+    /**
+     * Returns the depth of the current element. Outside of the root of the document the depth is
+     * {@code 0}. The depth is incremented by {@code 1} before each {@code start element} event and
+     * is decremented by {@code 1} after each {@code end element} event.
+     */
+    public int getDepth() {
+        return mDepth;
+    }
+
+    /**
+     * Returns the type of the current event. See {@code EVENT_...} constants.
+     */
+    public int getEventType() {
+        return mCurrentEvent;
+    }
+
+    /**
+     * Returns the local name of the current element or {@code null} if the current event does not
+     * pertain to an element.
+     */
+    public String getName() {
+        if ((mCurrentEvent != EVENT_START_ELEMENT) && (mCurrentEvent != EVENT_END_ELEMENT)) {
+            return null;
+        }
+        return mCurrentElementName;
+    }
+
+    /**
+     * Returns the namespace of the current element or {@code null} if the current event does not
+     * pertain to an element. Returns an empty string if the element is not associated with a
+     * namespace.
+     */
+    public String getNamespace() {
+        if ((mCurrentEvent != EVENT_START_ELEMENT) && (mCurrentEvent != EVENT_END_ELEMENT)) {
+            return null;
+        }
+        return mCurrentElementNamespace;
+    }
+
+    /**
+     * Returns the number of attributes of the element associated with the current event or
+     * {@code -1} if no element is associated with the current event.
+     */
+    public int getAttributeCount() {
+        if (mCurrentEvent != EVENT_START_ELEMENT) {
+            return -1;
+        }
+
+        return mCurrentElementAttributeCount;
+    }
+
+    /**
+     * Returns the resource ID corresponding to the name of the specified attribute of the current
+     * element or {@code 0} if the name is not associated with a resource ID.
+     *
+     * @throws IndexOutOfBoundsException if the index is out of range or the current event is not a
+     *         {@code start element} event
+     * @throws XmlParserException if a parsing error is occurred
+     */
+    public int getAttributeNameResourceId(int index) throws XmlParserException {
+        return getAttribute(index).getNameResourceId();
+    }
+
+    /**
+     * Returns the name of the specified attribute of the current element.
+     *
+     * @throws IndexOutOfBoundsException if the index is out of range or the current event is not a
+     *         {@code start element} event
+     * @throws XmlParserException if a parsing error is occurred
+     */
+    public String getAttributeName(int index) throws XmlParserException {
+        return getAttribute(index).getName();
+    }
+
+    /**
+     * Returns the name of the specified attribute of the current element or an empty string if
+     * the attribute is not associated with a namespace.
+     *
+     * @throws IndexOutOfBoundsException if the index is out of range or the current event is not a
+     *         {@code start element} event
+     * @throws XmlParserException if a parsing error is occurred
+     */
+    public String getAttributeNamespace(int index) throws XmlParserException {
+        return getAttribute(index).getNamespace();
+    }
+
+    /**
+     * Returns the value type of the specified attribute of the current element. See
+     * {@code VALUE_TYPE_...} constants.
+     *
+     * @throws IndexOutOfBoundsException if the index is out of range or the current event is not a
+     *         {@code start element} event
+     * @throws XmlParserException if a parsing error is occurred
+     */
+    public int getAttributeValueType(int index) throws XmlParserException {
+        int type = getAttribute(index).getValueType();
+        switch (type) {
+            case Attribute.TYPE_STRING:
+                return VALUE_TYPE_STRING;
+            case Attribute.TYPE_INT_DEC:
+            case Attribute.TYPE_INT_HEX:
+                return VALUE_TYPE_INT;
+            case Attribute.TYPE_REFERENCE:
+                return VALUE_TYPE_REFERENCE;
+            case Attribute.TYPE_INT_BOOLEAN:
+                return VALUE_TYPE_BOOLEAN;
+            default:
+                return VALUE_TYPE_UNSUPPORTED;
+        }
+    }
+
+    /**
+     * Returns the integer value of the specified attribute of the current element. See
+     * {@code VALUE_TYPE_...} constants.
+     *
+     * @throws IndexOutOfBoundsException if the index is out of range or the current event is not a
+     *         {@code start element} event.
+     * @throws XmlParserException if a parsing error is occurred
+     */
+    public int getAttributeIntValue(int index) throws XmlParserException {
+        return getAttribute(index).getIntValue();
+    }
+
+    /**
+     * Returns the boolean value of the specified attribute of the current element. See
+     * {@code VALUE_TYPE_...} constants.
+     *
+     * @throws IndexOutOfBoundsException if the index is out of range or the current event is not a
+     *         {@code start element} event.
+     * @throws XmlParserException if a parsing error is occurred
+     */
+    public boolean getAttributeBooleanValue(int index) throws XmlParserException {
+        return getAttribute(index).getBooleanValue();
+    }
+
+    /**
+     * Returns the string value of the specified attribute of the current element. See
+     * {@code VALUE_TYPE_...} constants.
+     *
+     * @throws IndexOutOfBoundsException if the index is out of range or the current event is not a
+     *         {@code start element} event.
+     * @throws XmlParserException if a parsing error is occurred
+     */
+    public String getAttributeStringValue(int index) throws XmlParserException {
+        return getAttribute(index).getStringValue();
+    }
+
+    private Attribute getAttribute(int index) {
+        if (mCurrentEvent != EVENT_START_ELEMENT) {
+            throw new IndexOutOfBoundsException("Current event not a START_ELEMENT");
+        }
+        if (index < 0) {
+            throw new IndexOutOfBoundsException("index must be >= 0");
+        }
+        if (index >= mCurrentElementAttributeCount) {
+            throw new IndexOutOfBoundsException(
+                    "index must be <= attr count (" + mCurrentElementAttributeCount + ")");
+        }
+        parseCurrentElementAttributesIfNotParsed();
+        return mCurrentElementAttributes.get(index);
+    }
+
+    /**
+     * Advances to the next parsing event and returns its type. See {@code EVENT_...} constants.
+     */
+    public int next() throws XmlParserException {
+        // Decrement depth if the previous event was "end element".
+        if (mCurrentEvent == EVENT_END_ELEMENT) {
+            mDepth--;
+        }
+
+        // Read events from document, ignoring events that we don't report to caller. Stop at the
+        // earliest event which we report to caller.
+        while (mXml.hasRemaining()) {
+            Chunk chunk = Chunk.get(mXml);
+            if (chunk == null) {
+                break;
+            }
+            switch (chunk.getType()) {
+                case Chunk.TYPE_STRING_POOL:
+                    if (mStringPool != null) {
+                        throw new XmlParserException("Multiple string pools not supported");
+                    }
+                    mStringPool = new StringPool(chunk);
+                    break;
+
+                case Chunk.RES_XML_TYPE_START_ELEMENT:
+                {
+                    if (mStringPool == null) {
+                        throw new XmlParserException(
+                                "Named element encountered before string pool");
+                    }
+                    ByteBuffer contents = chunk.getContents();
+                    if (contents.remaining() < 20) {
+                        throw new XmlParserException(
+                                "Start element chunk too short. Need at least 20 bytes. Available: "
+                                        + contents.remaining() + " bytes");
+                    }
+                    long nsId = getUnsignedInt32(contents);
+                    long nameId = getUnsignedInt32(contents);
+                    int attrStartOffset = getUnsignedInt16(contents);
+                    int attrSizeBytes = getUnsignedInt16(contents);
+                    int attrCount = getUnsignedInt16(contents);
+                    long attrEndOffset = attrStartOffset + ((long) attrCount) * attrSizeBytes;
+                    contents.position(0);
+                    if (attrStartOffset > contents.remaining()) {
+                        throw new XmlParserException(
+                                "Attributes start offset out of bounds: " + attrStartOffset
+                                    + ", max: " + contents.remaining());
+                    }
+                    if (attrEndOffset > contents.remaining()) {
+                        throw new XmlParserException(
+                                "Attributes end offset out of bounds: " + attrEndOffset
+                                    + ", max: " + contents.remaining());
+                    }
+
+                    mCurrentElementName = mStringPool.getString(nameId);
+                    mCurrentElementNamespace =
+                            (nsId == NO_NAMESPACE) ? "" : mStringPool.getString(nsId);
+                    mCurrentElementAttributeCount = attrCount;
+                    mCurrentElementAttributes = null;
+                    mCurrentElementAttrSizeBytes = attrSizeBytes;
+                    mCurrentElementAttributesContents =
+                            sliceFromTo(contents, attrStartOffset, attrEndOffset);
+
+                    mDepth++;
+                    mCurrentEvent = EVENT_START_ELEMENT;
+                    return mCurrentEvent;
+                }
+
+                case Chunk.RES_XML_TYPE_END_ELEMENT:
+                {
+                    if (mStringPool == null) {
+                        throw new XmlParserException(
+                                "Named element encountered before string pool");
+                    }
+                    ByteBuffer contents = chunk.getContents();
+                    if (contents.remaining() < 8) {
+                        throw new XmlParserException(
+                                "End element chunk too short. Need at least 8 bytes. Available: "
+                                        + contents.remaining() + " bytes");
+                    }
+                    long nsId = getUnsignedInt32(contents);
+                    long nameId = getUnsignedInt32(contents);
+                    mCurrentElementName = mStringPool.getString(nameId);
+                    mCurrentElementNamespace =
+                            (nsId == NO_NAMESPACE) ? "" : mStringPool.getString(nsId);
+                    mCurrentEvent = EVENT_END_ELEMENT;
+                    mCurrentElementAttributes = null;
+                    mCurrentElementAttributesContents = null;
+                    return mCurrentEvent;
+                }
+                case Chunk.RES_XML_TYPE_RESOURCE_MAP:
+                    if (mResourceMap != null) {
+                        throw new XmlParserException("Multiple resource maps not supported");
+                    }
+                    mResourceMap = new ResourceMap(chunk);
+                    break;
+                default:
+                    // Unknown chunk type -- ignore
+                    break;
+            }
+        }
+
+        mCurrentEvent = EVENT_END_DOCUMENT;
+        return mCurrentEvent;
+    }
+
+    private void parseCurrentElementAttributesIfNotParsed() {
+        if (mCurrentElementAttributes != null) {
+            return;
+        }
+        mCurrentElementAttributes = new ArrayList<>(mCurrentElementAttributeCount);
+        for (int i = 0; i < mCurrentElementAttributeCount; i++) {
+            int startPosition = i * mCurrentElementAttrSizeBytes;
+            ByteBuffer attr =
+                    sliceFromTo(
+                            mCurrentElementAttributesContents,
+                            startPosition,
+                            startPosition + mCurrentElementAttrSizeBytes);
+            long nsId = getUnsignedInt32(attr);
+            long nameId = getUnsignedInt32(attr);
+            attr.position(attr.position() + 7); // skip ignored fields
+            int valueType = getUnsignedInt8(attr);
+            long valueData = getUnsignedInt32(attr);
+            mCurrentElementAttributes.add(
+                    new Attribute(
+                            nsId,
+                            nameId,
+                            valueType,
+                            (int) valueData,
+                            mStringPool,
+                            mResourceMap));
+        }
+    }
+
+    private static class Attribute {
+        private static final int TYPE_REFERENCE = 1;
+        private static final int TYPE_STRING = 3;
+        private static final int TYPE_INT_DEC = 0x10;
+        private static final int TYPE_INT_HEX = 0x11;
+        private static final int TYPE_INT_BOOLEAN = 0x12;
+
+        private final long mNsId;
+        private final long mNameId;
+        private final int mValueType;
+        private final int mValueData;
+        private final StringPool mStringPool;
+        private final ResourceMap mResourceMap;
+
+        private Attribute(
+                long nsId,
+                long nameId,
+                int valueType,
+                int valueData,
+                StringPool stringPool,
+                ResourceMap resourceMap) {
+            mNsId = nsId;
+            mNameId = nameId;
+            mValueType = valueType;
+            mValueData = valueData;
+            mStringPool = stringPool;
+            mResourceMap = resourceMap;
+        }
+
+        public int getNameResourceId() {
+            return (mResourceMap != null) ? mResourceMap.getResourceId(mNameId) : 0;
+        }
+
+        public String getName() throws XmlParserException {
+            return mStringPool.getString(mNameId);
+        }
+
+        public String getNamespace() throws XmlParserException {
+            return (mNsId != NO_NAMESPACE) ? mStringPool.getString(mNsId) : "";
+        }
+
+        public int getValueType() {
+            return mValueType;
+        }
+
+        public int getIntValue() throws XmlParserException {
+            switch (mValueType) {
+                case TYPE_REFERENCE:
+                case TYPE_INT_DEC:
+                case TYPE_INT_HEX:
+                case TYPE_INT_BOOLEAN:
+                    return mValueData;
+                default:
+                    throw new XmlParserException("Cannot coerce to int: value type " + mValueType);
+            }
+        }
+
+        public boolean getBooleanValue() throws XmlParserException {
+            switch (mValueType) {
+                case TYPE_INT_BOOLEAN:
+                    return mValueData != 0;
+                default:
+                    throw new XmlParserException(
+                            "Cannot coerce to boolean: value type " + mValueType);
+            }
+        }
+
+        public String getStringValue() throws XmlParserException {
+            switch (mValueType) {
+                case TYPE_STRING:
+                    return mStringPool.getString(mValueData & 0xffffffffL);
+                case TYPE_INT_DEC:
+                    return Integer.toString(mValueData);
+                case TYPE_INT_HEX:
+                    return "0x" + Integer.toHexString(mValueData);
+                case TYPE_INT_BOOLEAN:
+                    return Boolean.toString(mValueData != 0);
+                case TYPE_REFERENCE:
+                    return "@" + Integer.toHexString(mValueData);
+                default:
+                    throw new XmlParserException(
+                            "Cannot coerce to string: value type " + mValueType);
+            }
+        }
+    }
+
+    /**
+     * Chunk of a document. Each chunk is tagged with a type and consists of a header followed by
+     * contents.
+     */
+    private static class Chunk {
+        public static final int TYPE_STRING_POOL = 1;
+        public static final int TYPE_RES_XML = 3;
+        public static final int RES_XML_TYPE_START_ELEMENT = 0x0102;
+        public static final int RES_XML_TYPE_END_ELEMENT = 0x0103;
+        public static final int RES_XML_TYPE_RESOURCE_MAP = 0x0180;
+
+        static final int HEADER_MIN_SIZE_BYTES = 8;
+
+        private final int mType;
+        private final ByteBuffer mHeader;
+        private final ByteBuffer mContents;
+
+        public Chunk(int type, ByteBuffer header, ByteBuffer contents) {
+            mType = type;
+            mHeader = header;
+            mContents = contents;
+        }
+
+        public ByteBuffer getContents() {
+            ByteBuffer result = mContents.slice();
+            result.order(mContents.order());
+            return result;
+        }
+
+        public ByteBuffer getHeader() {
+            ByteBuffer result = mHeader.slice();
+            result.order(mHeader.order());
+            return result;
+        }
+
+        public int getType() {
+            return mType;
+        }
+
+        /**
+         * Consumes the chunk located at the current position of the input and returns the chunk
+         * or {@code null} if there is no chunk left in the input.
+         *
+         * @throws XmlParserException if the chunk is malformed
+         */
+        public static Chunk get(ByteBuffer input) throws XmlParserException {
+            if (input.remaining() < HEADER_MIN_SIZE_BYTES) {
+                // Android ignores the last chunk if its header is too big to fit into the file
+                input.position(input.limit());
+                return null;
+            }
+
+            int originalPosition = input.position();
+            int type = getUnsignedInt16(input);
+            int headerSize = getUnsignedInt16(input);
+            long chunkSize = getUnsignedInt32(input);
+            long chunkRemaining = chunkSize - 8;
+            if (chunkRemaining > input.remaining()) {
+                // Android ignores the last chunk if it's too big to fit into the file
+                input.position(input.limit());
+                return null;
+            }
+            if (headerSize < HEADER_MIN_SIZE_BYTES) {
+                throw new XmlParserException(
+                        "Malformed chunk: header too short: " + headerSize + " bytes");
+            } else if (headerSize > chunkSize) {
+                throw new XmlParserException(
+                        "Malformed chunk: header too long: " + headerSize + " bytes. Chunk size: "
+                                + chunkSize + " bytes");
+            }
+            int contentStartPosition = originalPosition + headerSize;
+            long chunkEndPosition = originalPosition + chunkSize;
+            Chunk chunk =
+                    new Chunk(
+                            type,
+                            sliceFromTo(input, originalPosition, contentStartPosition),
+                            sliceFromTo(input, contentStartPosition, chunkEndPosition));
+            input.position((int) chunkEndPosition);
+            return chunk;
+        }
+    }
+
+    /**
+     * String pool of a document. Strings are referenced by their {@code 0}-based index in the pool.
+     */
+    private static class StringPool {
+        private static final int FLAG_UTF8 = 1 << 8;
+
+        private final ByteBuffer mChunkContents;
+        private final ByteBuffer mStringsSection;
+        private final int mStringCount;
+        private final boolean mUtf8Encoded;
+        private final Map<Integer, String> mCachedStrings = new HashMap<>();
+
+        /**
+         * Constructs a new string pool from the provided chunk.
+         *
+         * @throws XmlParserException if a parsing error occurred
+         */
+        public StringPool(Chunk chunk) throws XmlParserException {
+            ByteBuffer header = chunk.getHeader();
+            int headerSizeBytes = header.remaining();
+            header.position(Chunk.HEADER_MIN_SIZE_BYTES);
+            if (header.remaining() < 20) {
+                throw new XmlParserException(
+                        "XML chunk's header too short. Required at least 20 bytes. Available: "
+                                + header.remaining() + " bytes");
+            }
+            long stringCount = getUnsignedInt32(header);
+            if (stringCount > Integer.MAX_VALUE) {
+                throw new XmlParserException("Too many strings: " + stringCount);
+            }
+            mStringCount = (int) stringCount;
+            long styleCount = getUnsignedInt32(header);
+            if (styleCount > Integer.MAX_VALUE) {
+                throw new XmlParserException("Too many styles: " + styleCount);
+            }
+            long flags = getUnsignedInt32(header);
+            long stringsStartOffset = getUnsignedInt32(header);
+            long stylesStartOffset = getUnsignedInt32(header);
+
+            ByteBuffer contents = chunk.getContents();
+            if (mStringCount > 0) {
+                int stringsSectionStartOffsetInContents =
+                        (int) (stringsStartOffset - headerSizeBytes);
+                int stringsSectionEndOffsetInContents;
+                if (styleCount > 0) {
+                    // Styles section follows the strings section
+                    if (stylesStartOffset < stringsStartOffset) {
+                        throw new XmlParserException(
+                                "Styles offset (" + stylesStartOffset + ") < strings offset ("
+                                        + stringsStartOffset + ")");
+                    }
+                    stringsSectionEndOffsetInContents = (int) (stylesStartOffset - headerSizeBytes);
+                } else {
+                    stringsSectionEndOffsetInContents = contents.remaining();
+                }
+                mStringsSection =
+                        sliceFromTo(
+                                contents,
+                                stringsSectionStartOffsetInContents,
+                                stringsSectionEndOffsetInContents);
+            } else {
+                mStringsSection = ByteBuffer.allocate(0);
+            }
+
+            mUtf8Encoded = (flags & FLAG_UTF8) != 0;
+            mChunkContents = contents;
+        }
+
+        /**
+         * Returns the string located at the specified {@code 0}-based index in this pool.
+         *
+         * @throws XmlParserException if the string does not exist or cannot be decoded
+         */
+        public String getString(long index) throws XmlParserException {
+            if (index < 0) {
+                throw new XmlParserException("Unsuported string index: " + index);
+            } else if (index >= mStringCount) {
+                throw new XmlParserException(
+                        "Unsuported string index: " + index + ", max: " + (mStringCount - 1));
+            }
+
+            int idx = (int) index;
+            String result = mCachedStrings.get(idx);
+            if (result != null) {
+                return result;
+            }
+
+            long offsetInStringsSection = getUnsignedInt32(mChunkContents, idx * 4);
+            if (offsetInStringsSection >= mStringsSection.capacity()) {
+                throw new XmlParserException(
+                        "Offset of string idx " + idx + " out of bounds: " + offsetInStringsSection
+                                + ", max: " + (mStringsSection.capacity() - 1));
+            }
+            mStringsSection.position((int) offsetInStringsSection);
+            result =
+                    (mUtf8Encoded)
+                            ? getLengthPrefixedUtf8EncodedString(mStringsSection)
+                            : getLengthPrefixedUtf16EncodedString(mStringsSection);
+            mCachedStrings.put(idx, result);
+            return result;
+        }
+
+        private static String getLengthPrefixedUtf16EncodedString(ByteBuffer encoded)
+                throws XmlParserException {
+            // If the length (in uint16s) is 0x7fff or lower, it is stored as a single uint16.
+            // Otherwise, it is stored as a big-endian uint32 with highest bit set. Thus, the range
+            // of supported values is 0 to 0x7fffffff inclusive.
+            int lengthChars = getUnsignedInt16(encoded);
+            if ((lengthChars & 0x8000) != 0) {
+                lengthChars = ((lengthChars & 0x7fff) << 16) | getUnsignedInt16(encoded);
+            }
+            if (lengthChars > Integer.MAX_VALUE / 2) {
+                throw new XmlParserException("String too long: " + lengthChars + " uint16s");
+            }
+            int lengthBytes = lengthChars * 2;
+
+            byte[] arr;
+            int arrOffset;
+            if (encoded.hasArray()) {
+                arr = encoded.array();
+                arrOffset = encoded.arrayOffset() + encoded.position();
+                encoded.position(encoded.position() + lengthBytes);
+            } else {
+                arr = new byte[lengthBytes];
+                arrOffset = 0;
+                encoded.get(arr);
+            }
+            // Reproduce the behavior of Android runtime which requires that the UTF-16 encoded
+            // array of bytes is NULL terminated.
+            if ((arr[arrOffset + lengthBytes] != 0)
+                    || (arr[arrOffset + lengthBytes + 1] != 0)) {
+                throw new XmlParserException("UTF-16 encoded form of string not NULL terminated");
+            }
+            try {
+                return new String(arr, arrOffset, lengthBytes, "UTF-16LE");
+            } catch (UnsupportedEncodingException e) {
+                throw new RuntimeException("UTF-16LE character encoding not supported", e);
+            }
+        }
+
+        private static String getLengthPrefixedUtf8EncodedString(ByteBuffer encoded)
+                throws XmlParserException {
+            // If the length (in bytes) is 0x7f or lower, it is stored as a single uint8. Otherwise,
+            // it is stored as a big-endian uint16 with highest bit set. Thus, the range of
+            // supported values is 0 to 0x7fff inclusive.
+
+            // Skip UTF-16 encoded length (in uint16s)
+            int lengthBytes = getUnsignedInt8(encoded);
+            if ((lengthBytes & 0x80) != 0) {
+                lengthBytes = ((lengthBytes & 0x7f) << 8) | getUnsignedInt8(encoded);
+            }
+
+            // Read UTF-8 encoded length (in bytes)
+            lengthBytes = getUnsignedInt8(encoded);
+            if ((lengthBytes & 0x80) != 0) {
+                lengthBytes = ((lengthBytes & 0x7f) << 8) | getUnsignedInt8(encoded);
+            }
+
+            byte[] arr;
+            int arrOffset;
+            if (encoded.hasArray()) {
+                arr = encoded.array();
+                arrOffset = encoded.arrayOffset() + encoded.position();
+                encoded.position(encoded.position() + lengthBytes);
+            } else {
+                arr = new byte[lengthBytes];
+                arrOffset = 0;
+                encoded.get(arr);
+            }
+            // Reproduce the behavior of Android runtime which requires that the UTF-8 encoded array
+            // of bytes is NULL terminated.
+            if (arr[arrOffset + lengthBytes] != 0) {
+                throw new XmlParserException("UTF-8 encoded form of string not NULL terminated");
+            }
+            try {
+                return new String(arr, arrOffset, lengthBytes, "UTF-8");
+            } catch (UnsupportedEncodingException e) {
+                throw new RuntimeException("UTF-8 character encoding not supported", e);
+            }
+        }
+    }
+
+    /**
+     * Resource map of a document. Resource IDs are referenced by their {@code 0}-based index in the
+     * map.
+     */
+    private static class ResourceMap {
+        private final ByteBuffer mChunkContents;
+        private final int mEntryCount;
+
+        /**
+         * Constructs a new resource map from the provided chunk.
+         *
+         * @throws XmlParserException if a parsing error occurred
+         */
+        public ResourceMap(Chunk chunk) throws XmlParserException {
+            mChunkContents = chunk.getContents().slice();
+            mChunkContents.order(chunk.getContents().order());
+            // Each entry of the map is four bytes long, containing the int32 resource ID.
+            mEntryCount = mChunkContents.remaining() /  4;
+        }
+
+        /**
+         * Returns the resource ID located at the specified {@code 0}-based index in this pool or
+         * {@code 0} if the index is out of range.
+         */
+        public int getResourceId(long index) {
+            if ((index < 0) || (index >= mEntryCount)) {
+                return 0;
+            }
+            int idx = (int) index;
+            // Each entry of the map is four bytes long, containing the int32 resource ID.
+            return mChunkContents.getInt(idx * 4);
+        }
+    }
+
+    /**
+     * Returns new byte buffer whose content is a shared subsequence of this buffer's content
+     * between the specified start (inclusive) and end (exclusive) positions. As opposed to
+     * {@link ByteBuffer#slice()}, the returned buffer's byte order is the same as the source
+     * buffer's byte order.
+     */
+    private static ByteBuffer sliceFromTo(ByteBuffer source, long start, long end) {
+        if (start < 0) {
+            throw new IllegalArgumentException("start: " + start);
+        }
+        if (end < start) {
+            throw new IllegalArgumentException("end < start: " + end + " < " + start);
+        }
+        int capacity = source.capacity();
+        if (end > source.capacity()) {
+            throw new IllegalArgumentException("end > capacity: " + end + " > " + capacity);
+        }
+        return sliceFromTo(source, (int) start, (int) end);
+    }
+
+    /**
+     * Returns new byte buffer whose content is a shared subsequence of this buffer's content
+     * between the specified start (inclusive) and end (exclusive) positions. As opposed to
+     * {@link ByteBuffer#slice()}, the returned buffer's byte order is the same as the source
+     * buffer's byte order.
+     */
+    private static ByteBuffer sliceFromTo(ByteBuffer source, int start, int end) {
+        if (start < 0) {
+            throw new IllegalArgumentException("start: " + start);
+        }
+        if (end < start) {
+            throw new IllegalArgumentException("end < start: " + end + " < " + start);
+        }
+        int capacity = source.capacity();
+        if (end > source.capacity()) {
+            throw new IllegalArgumentException("end > capacity: " + end + " > " + capacity);
+        }
+        int originalLimit = source.limit();
+        int originalPosition = source.position();
+        try {
+            source.position(0);
+            source.limit(end);
+            source.position(start);
+            ByteBuffer result = source.slice();
+            result.order(source.order());
+            return result;
+        } finally {
+            source.position(0);
+            source.limit(originalLimit);
+            source.position(originalPosition);
+        }
+    }
+
+    private static int getUnsignedInt8(ByteBuffer buffer) {
+        return buffer.get() & 0xff;
+    }
+
+    private static int getUnsignedInt16(ByteBuffer buffer) {
+        return buffer.getShort() & 0xffff;
+    }
+
+    private static long getUnsignedInt32(ByteBuffer buffer) {
+        return buffer.getInt() & 0xffffffffL;
+    }
+
+    private static long getUnsignedInt32(ByteBuffer buffer, int position) {
+        return buffer.getInt(position) & 0xffffffffL;
+    }
+
+    /**
+     * Indicates that an error occurred while parsing a document.
+     */
+    public static class XmlParserException extends Exception {
+        private static final long serialVersionUID = 1L;
+
+        public XmlParserException(String message) {
+            super(message);
+        }
+
+        public XmlParserException(String message, Throwable cause) {
+            super(message, cause);
+        }
+    }
+}

app/src/main/java/com/android/apksig/internal/apk/ApkSigResult.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.apksig.internal.apk;
+
+import com.android.apksig.ApkVerificationIssue;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Base implementation of an APK signature verification result.
+ */
+public class ApkSigResult {
+    public final int signatureSchemeVersion;
+
+    /** Whether the APK's Signature Scheme signature verifies. */
+    public boolean verified;
+
+    public final List<ApkSignerInfo> mSigners = new ArrayList<>();
+    private final List<ApkVerificationIssue> mWarnings = new ArrayList<>();
+    private final List<ApkVerificationIssue> mErrors = new ArrayList<>();
+
+    public ApkSigResult(int signatureSchemeVersion) {
+        this.signatureSchemeVersion = signatureSchemeVersion;
+    }
+
+    /**
+     * Returns {@code true} if this result encountered errors during verification.
+     */
+    public boolean containsErrors() {
+        if (!mErrors.isEmpty()) {
+            return true;
+        }
+        if (!mSigners.isEmpty()) {
+            for (ApkSignerInfo signer : mSigners) {
+                if (signer.containsErrors()) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Returns {@code true} if this result encountered warnings during verification.
+     */
+    public boolean containsWarnings() {
+        if (!mWarnings.isEmpty()) {
+            return true;
+        }
+        if (!mSigners.isEmpty()) {
+            for (ApkSignerInfo signer : mSigners) {
+                if (signer.containsWarnings()) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Adds a new {@link ApkVerificationIssue} as an error to this result using the provided {@code
+     * issueId} and {@code params}.
+     */
+    public void addError(int issueId, Object... parameters) {
+        mErrors.add(new ApkVerificationIssue(issueId, parameters));
+    }
+
+    /**
+     * Adds a new {@link ApkVerificationIssue} as a warning to this result using the provided {@code
+     * issueId} and {@code params}.
+     */
+    public void addWarning(int issueId, Object... parameters) {
+        mWarnings.add(new ApkVerificationIssue(issueId, parameters));
+    }
+
+    /**
+     * Returns the errors encountered during verification.
+     */
+    public List<? extends ApkVerificationIssue> getErrors() {
+        return mErrors;
+    }
+
+    /**
+     * Returns the warnings encountered during verification.
+     */
+    public List<? extends ApkVerificationIssue> getWarnings() {
+        return mWarnings;
+    }
+}