diff --git a/app/src/main/java/com/gh/download/simple/SimpleDownloadManager.kt b/app/src/main/java/com/gh/download/simple/SimpleDownloadManager.kt
index 9d24da4f47..802fe6c934 100644
--- a/app/src/main/java/com/gh/download/simple/SimpleDownloadManager.kt
+++ b/app/src/main/java/com/gh/download/simple/SimpleDownloadManager.kt
@@ -4,7 +4,7 @@ import com.lg.download.*
 import com.lg.ndownload.DownloadConfig
 import com.lg.ndownload.DownloadDbManager
 import com.lg.ndownload.DownloadQueue
-import com.lightgame.download.FileUtils
+import com.gh.gamecenter.common.utils.FileUtils
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
 
diff --git a/app/src/main/java/com/gh/gamecenter/MainActivity.java b/app/src/main/java/com/gh/gamecenter/MainActivity.java
index 351871df61..c90f04f7b1 100644
--- a/app/src/main/java/com/gh/gamecenter/MainActivity.java
+++ b/app/src/main/java/com/gh/gamecenter/MainActivity.java
@@ -114,8 +114,6 @@ import com.google.gson.reflect.TypeToken;
 import com.halo.assistant.HaloApp;
 import com.lightgame.download.DownloadEntity;
 import com.lightgame.download.DownloadStatus;
-import com.lightgame.download.FileUtils;
-import com.lightgame.utils.AppManager;
 import com.lightgame.utils.Utils;
 import com.sina.weibo.sdk.auth.AuthInfo;
 import com.sina.weibo.sdk.openapi.IWBAPI;
diff --git a/app/src/main/java/com/gh/gamecenter/update/UpdateHelper.kt b/app/src/main/java/com/gh/gamecenter/update/UpdateHelper.kt
index bd35e1a68a..69bd855535 100644
--- a/app/src/main/java/com/gh/gamecenter/update/UpdateHelper.kt
+++ b/app/src/main/java/com/gh/gamecenter/update/UpdateHelper.kt
@@ -21,8 +21,8 @@ import com.gh.gamecenter.retrofit.RetrofitManager
 import com.gh.ndownload.NDataChanger
 import com.halo.assistant.HaloApp
 import com.lightgame.download.DownloadEntity
-import com.lightgame.download.FileUtils
 import com.lightgame.utils.AppManager
+import com.gh.gamecenter.common.utils.FileUtils
 import com.lightgame.utils.Utils
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.schedulers.Schedulers
diff --git a/module_common/src/main/java/com/gh/gamecenter/common/utils/FileUtils.java b/module_common/src/main/java/com/gh/gamecenter/common/utils/FileUtils.java
index f61cd477c9..e0561a653a 100644
--- a/module_common/src/main/java/com/gh/gamecenter/common/utils/FileUtils.java
+++ b/module_common/src/main/java/com/gh/gamecenter/common/utils/FileUtils.java
@@ -42,7 +42,21 @@ public class FileUtils {
         String dir;
         String baseDir;
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
-            baseDir = context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath();
+            try {
+                // 在部分设备，可能是使用 sd 卡的设备？ getExternalFilesDir 方法返回 null
+                // 异常时使用备用存储位置作为下载地址
+                baseDir = context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath();
+            } catch (NullPointerException exception) {
+                if (Build.VERSION.SDK_INT == Build.VERSION_CODES.M) {
+                    // Android 6.0 的设备无法直接下载至根目录 Download 文件夹（需要获取外部存储权限）
+                    // 使用 getFilesDir 方法后，默认情况下 PackageInstaller 无法获取直接读取安装 APK
+                    // 一般的处理方式是下载的时候将文件 openFileOutput(APK_FILENAME, Context.MODE_WORLD_READABLE)
+                    // 但因为下载文件由下载模块创建，暂时不做修改，换成在下载完成后调用 file.setReadable(true, false) 使文件可读
+                    baseDir = context.getFilesDir().getAbsolutePath();
+                } else {
+                    baseDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath();
+                }
+            }
         } else {
             baseDir = context.getFilesDir().getAbsolutePath();
         }