android手机各种操作时activity执行的方法
启动时：onCreate, onStart, onResume
按Home键：onPause, onStop
从菜单中重新启动时：onReStart, onStart, onResume
长按Home键并从stop堆栈列表中启动时：onReStart, onStart, onResume
按返回键：onPause, onStop, onDestroy
按过返回键之后再从菜单或stop堆栈列表中启动时：onCreate, onStart, onResume
转屏时(Ctrl+F11)：onPause, onStop, onDestroy,然后onCreate, onStart, onResume?
