切换到该Fragment
onAttach
onCreate
onCreateView
onActivityCreated
onStart
onResume
屏幕灭掉：
onPause
onSaveInstanceState
onStop
屏幕解锁
onStart
onResume
切换到其他Fragment:
onPause
onStop
onDestroyView
切换回本身的Fragment:
onCreateView
onActivityCreated
onStart
onResume
回到桌面
onPause
onSaveInstanceState
onStop
回到应用
onStart
onResume
退出应用
onPause
onStop
onDestroyView
onDestroy
onDetach
