- 初次打开FragmentActivity时
VisitTaskManagerActivity(): onCreate
VisitTaskManagerActivity(): onStart
VisitTaskManagerActivity(): onResume Fragment1(): onAttach
Fragment1(): onCreate
Fragment1(): onCreateView
Fragment1(): onViewCreated
Fragment1(): onActivityCreated
Fragment1(): onViewStateRestored
Fragment1(): onStart
Fragment1(): onResume Fragment2(): onAttach
Fragment2(): onCreate
Fragment2(): onCreateView
Fragment2(): onViewCreated
Fragment2(): onActivityCreated
Fragment2(): onViewStateRestored Fragment3(): onAttach
Fragment3(): onCreate
Fragment3(): onCreateView
Fragment3(): onViewCreated
Fragment3(): onActivityCreated
Fragment3(): onViewStateRestored Fragment4(): onAttach
Fragment4(): onCreate
Fragment4(): onCreateView
Fragment4(): onViewCreated
Fragment4(): onActivityCreated
Fragment4(): onViewStateRestored Fragment2(): onStart
Fragment2(): onResume Fragment3(): onStart
Fragment3(): onResume Fragment4(): onStart
Fragment4(): onResume - 系统按HOME键到桌面时
VisitTaskManagerActivity(): onPause
Fragment1(): onPause
Fragment2(): onPause
Fragment3(): onPause
Fragment4(): onPause
VisitTaskManagerActivity(): onStop
Fragment1(): onStop
Fragment2(): onStop
Fragment3(): onStop
Fragment4(): onStop - 从桌面返回FragmentActivity时
VisitTaskManagerActivity(): onStart
Fragment1(): onStart
Fragment2(): onStart
Fragment3(): onStart
Fragment4(): onStart
VisitTaskManagerActivity(): onResume
Fragment1(): onResume
Fragment2(): onResume
Fragment3(): onResume
Fragment4(): onResume - 自动切换横竖屏时（或者按HOME键到桌面时，杀掉进程，再从桌面返回FragmentActivity时）
VisitTaskManagerActivity(): onCreate Fragment1(): onAttach
Fragment1(): onCreate Fragment2(): onAttach
Fragment2(): onCreate Fragment3(): onAttach
Fragment3(): onCreate Fragment4(): onAttach
Fragment4(): onCreate VisitTaskManagerActivity(): onStart Fragment1(): onCreateView
Fragment1(): onViewCreated
Fragment1(): onActivityCreated
Fragment1(): onViewStateRestored Fragment2(): onCreateView
Fragment2(): onViewCreated
Fragment2(): onActivityCreated
Fragment2(): onViewStateRestored Fragment3(): onCreateView
Fragment3(): onViewCreated
Fragment3(): onActivityCreated
Fragment3(): onViewStateRestored Fragment4(): onCreateView
Fragment4(): onViewCreated
Fragment4(): onActivityCreated
Fragment4(): onViewStateRestored Fragment1(): onStart
Fragment2(): onStart
Fragment3(): onStart
Fragment4(): onStart VisitTaskManagerActivity(): onResume
Fragment1(): onResume
Fragment2(): onResume
Fragment3(): onResume
Fragment4(): onResume
在此使用onSaveInstanceState来保存临时状态的需留意的：
- 根据官方文档的说明，onSaveInstanceState的调用时机为非正常finish()情况下，可能在onPause到onDestroy之间的任意时刻调用。
onSaveInstanceState | Android Developers