Lifecycle

Source Code

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。