android系统杀死应用程序时如何保存我的应用程序状态？

Question

我知道按下主页按钮时会调用onPause，onStop和onSavedInstanceData，但是我怎么知道Android系统何时杀死我的应用程序或在任务管理器中销毁它？

Answer 1

Please note that when we press back button ie, ourself close the activity then onSaveInstance() is not called.

Whenever android system destroy your activity because of low memory conditions onSaveInstance and then onRestoreInstance is called when it is recreated. Hence you should save the state in onSaveInstance.