整理代码

app/src/main/java/com/gh/common/util/SyncDataBetweenPageHelper.kt

@@ -5,59 +5,86 @@ import android.content.Context
 import android.content.Intent
 import android.os.Parcelable
 import com.gh.common.annotation.Synchronize
+import com.gh.common.util.SyncDataBetweenPageHelper.resultHandle
+import com.gh.gamecenter.entity.RatingComment
+import com.gh.gamecenter.gamedetail.rating.RatingAdapter
+import com.gh.gamecenter.gamedetail.rating.RatingReplyActivity
 
 /**
  * 页面之间实现数据同步
  * 需要同步的数据,在相应的字段加上[Synchronize]注解,关键方法[resultHandle]
  * 如无特殊情况,尽量使用下面方法进行页面联动
+ * ----------------------------------------------------------------
+ * 具体参考(游戏详情:评论列表<-->评论详情):
+ * 数据实体=>[RatingComment]
+ * 回调数据=>[RatingReplyActivity.handleBackPressed]
+ * 回调处理=>[RatingAdapter.handleSyncData]
  */
 
-const val REQUEST_CODE_TAG = "REQUEST_CODE_TAG"
-const val DATA_POSITION_TAG = "DATA_POSITION_TAG"
-const val DEFAULT_NUMBER = -1111
 
-fun Context.startActivityForResult(intent: Intent, requestCode: Int, dataPosition: Int) {
-    if (this is Activity) {
-        intent.putExtra(DATA_POSITION_TAG, dataPosition)
-        intent.putExtra(REQUEST_CODE_TAG, requestCode)
-        startActivityForResult(intent, requestCode)
-    }
-}
+object SyncDataBetweenPageHelper {
 
-fun <T : Parcelable> Context.setResultAndFinish(syncData: T?, resultCode: Int = Activity.RESULT_OK): Boolean {
-    if (this is Activity) {
-        val requestCode = intent.getIntExtra(REQUEST_CODE_TAG, DEFAULT_NUMBER)
-        val dataPosition = intent.getIntExtra(DATA_POSITION_TAG, DEFAULT_NUMBER)
-        if (syncData != null && requestCode != DEFAULT_NUMBER) {
-            val intent = Intent()
+    private const val REQUEST_CODE_TAG = "REQUEST_CODE_TAG"
+    private const val DATA_POSITION_TAG = "DATA_POSITION_TAG"
+    private const val DEFAULT_NUMBER = -1111
+
+    fun startActivityForResult(context: Context, intent: Intent, requestCode: Int, dataPosition: Int) {
+        if (context is Activity) {
             intent.putExtra(DATA_POSITION_TAG, dataPosition)
-            intent.putExtra(syncData::class.java.simpleName, syncData)
-            setResult(resultCode, intent)
-            finish()
-            return true
+            intent.putExtra(REQUEST_CODE_TAG, requestCode)
+            context.startActivityForResult(intent, requestCode)
         }
     }
-    return false
-}
 
-fun <T : Parcelable> Intent.resultHandle(callback: OnSyncCallBack<T>) {
-    val dataPosition = getIntExtra(DATA_POSITION_TAG, DEFAULT_NUMBER)
-    val syncData = callback.onData(dataPosition) ?: return
-
-    val resultData = getParcelableExtra<T>(syncData::class.java.simpleName)
-    val fields = syncData::class.java.declaredFields
-    for (field in fields) {
-        if (field.getAnnotation(Synchronize::class.java) != null) {
-            // 同步数据
-            val resultField = resultData::class.java.getDeclaredField(field.name)
-            resultField.isAccessible = true
-            field.isAccessible = true
-            field.set(syncData, resultField.get(resultData))
+    fun <T : Parcelable> setResultAndFinish(context: Context, syncData: T?, resultCode: Int = Activity.RESULT_OK): Boolean {
+        if (context is Activity) {
+            val requestCode = context.intent.getIntExtra(REQUEST_CODE_TAG, DEFAULT_NUMBER)
+            val dataPosition = context.intent.getIntExtra(DATA_POSITION_TAG, DEFAULT_NUMBER)
+            if (syncData != null && requestCode != DEFAULT_NUMBER) {
+                val intent = Intent()
+                intent.putExtra(DATA_POSITION_TAG, dataPosition)
+                intent.putExtra(syncData::class.java.simpleName, syncData)
+                context.setResult(resultCode, intent)
+                context.finish()
+                return true
+            }
         }
+        return false
+    }
+
+    fun <T : Parcelable> resultHandle(intent: Intent?, callback: OnSyncCallBack<T>) {
+        if (intent == null) return
+
+        val dataPosition = intent.getIntExtra(DATA_POSITION_TAG, DEFAULT_NUMBER)
+        val syncData = callback.onData(dataPosition) ?: return
+
+        val resultData = intent.getParcelableExtra<T>(syncData::class.java.simpleName)
+        val fields = syncData::class.java.declaredFields
+        var isNeedNotify = false
+        for (field in fields) {
+            if (field.getAnnotation(Synchronize::class.java) != null) {
+                // 同步数据
+                val resultField = resultData::class.java.getDeclaredField(field.name)
+                resultField.isAccessible = true
+                field.isAccessible = true
+
+                val resultFieldDate = resultField.get(resultData)
+                if (field.get(syncData) != resultFieldDate) {
+                    field.set(syncData, resultFieldDate)
+                    if (!isNeedNotify) isNeedNotify = true
+                }
+            }
+        }
+
+        if (isNeedNotify) callback.onNotify(dataPosition)
     }
-    callback.onNotify(dataPosition)
 }
 
+/**
+ * dataPosition: 数据位置,和[SyncDataBetweenPageHelper.startActivityForResult] 的dataPosition对应
+ * [onData]: 返回需要同步的原数据
+ * [onNotify]: 同步完成后刷新页面,如果数据没有更改的话就不会触发(如果标记的不是基本数据类型有可能会触发)
+ */
 interface OnSyncCallBack<T> {
     fun onData(dataPosition: Int): T?