Miles' Blog

天涯何處無幹話，何必要講實務話

Lifecycle

Source Code

Result

會打這個記錄，最主要就是要用在狀態的儲存和恢復，還有旋轉螢幕的功能該如何實作。參考下面文章：

首次執行

Class Method
Main onCreate
MainFragment onAttach
Main onAttachFragment
MainFragment onCreate
MainFragment onCreateView
MainFragment onViewCreated
MainFragment onActivityCreated
Main onStart
MainFragment onStart
Main onPostCreate
Main onResume
MainFragment onResume
Main onPostResume
Main onCreateOptionsMenu
Main onPrepareOptionsMenu

Main按Home鍵回到桌面

Class Method
MainFragment onPause
Main onPause
Main onSaveInstanceState
MainFragment onSaveInstanceState
MainFragment onStop
Main onStop

多工鍵返回或按程式重新進入Main

Class Method
Main onRestart
Main onStart
MainFragment onStart
Main onResume
MainFragment onResume
Main onPostResume

多工鍵把程式關閉

無任何訊息

把程式關閉後再點程式進入

Class Method
Main onCreate
MainFragment onViewStateRestored
MainFragment onAttach
Main onAttachFragment
MainFragment onCreate
MainFragment onCreateView
MainFragment onViewCreated
MainFragment onActivityCreated
Main onStart
MainFragment onStart
Main onPostCreate
Main onResume
MainFragment onResume
Main onPostResume
Main onCreateOptionsMenu
Main onPrepareOptionsMenu

第2個 MainFragment.onViewStateRestored()，有 API Level 17 的限制。

Main執行finish或按返回鍵

這兩個動作的結果是一樣的。

Class Method
MainFragment onPause
Main onPause
MainFragment onStop
Main onStop
MainFragment onDestroyView
MainFragment onDestroy
MainFragment onDetach
Main onDestroy

Main 切換到 Sub

不管有沒有要回傳，都會是以下的結果。

Class Method
MainFragment onPause
Main onPause
Sub onCreate
SubFragment onAttach
Sub onAttachFragment
SubFragment onCreate
SubFragment onViewCreated
SubFragment onActivityCreated
Sub onStart
SubFragment onStart
Sub onPostCreate
Sub onResume
SubFragment onResume
Sub onPostResume
Sub onCreateOptionsMenu
Sub onPrepareOptionsMenu
Main onSaveInstanceState
MainFragment onSaveInstanceState
MainFragment onStop
Main onStop

Sub 執行 finish

包括有回傳值的也是一樣的結果

Class Method
SubFragment onPause
Sub onPause
MainFragment onActivityResult, requestCode: 10 , resultCode: 10
Main onRestart
Main onStart
MainFragment onStart
Main onResume
MainFragment onResume
Main onPostResume
SubFragment onStop
Sub onStop
SubFragment onDestroyView
SubFragment onDestroy
SubFragment onDetach
Sub onDestroy

Main 翻轉螢幕

Class Method
MainFragment onPause
Main onPause
Main onSaveInstanceState
MainFragment onSaveInstanceState
MainFragment onStop
Main onStop
MainFragment onDestroyView
MainFragment onDestroy
MainFragment onDetach
Main onDestroy
Main onCreate
MainFragment onAttach
Main onAttachFragment
MainFragment onCreate
MainFragment onCreateView
MainFragment onViewCreated
MainFragment onActivityCreated
Main onStart
MainFragment onStart
Main onRestoreInstanceState
Main onCreateOptionsMenu
Main onPrepareOptionsMenu
Main onPostCreate
Main onResume
MainFragment onResume
Main onPostResume

加入 android:configChanges 設定後，Main 翻轉螢幕

在 AudroidManifest.xml 加入 android:configChanges 設定：

  • android:configChanges=”orientation”
  • android:configChanges=”orientation|screenSize” (API level 13以上)
  • android:configChanges=”orientation|keyboardHidden” (使用 AVD 模擬器測試)
Class Method
Main onConfigurationChanged
MainFragment onConfigurationChanged

剛剛翻轉螢幕的動作全不見了，只剩下 onConfigurationChanged。

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