打开页面
lifeCycle::::onCreate
lifeCycle::::onStart
lifeCycle::::onResume
按Home键 、锁屏键
lifeCycle::::onPause
lifeCycle::::onStop
按Home键、锁屏键后打开应用
lifeCycle::::onRestart
lifeCycle::::onStart
lifeCycle::::onResume
关闭页面
lifeCycle::::onPause
lifeCycle::::onStop
lifeCycle::::onDestroy
打开新的activity
lifeCycle::::onPause
lifeCycle::::onStop
打开新的activity后返回(会调用onRestart)
lifeCycle::::onRestart
lifeCycle::::onStart
lifeCycle::::onResume
横竖屏切换
lifeCycle::::onPause
lifeCycle::::onStop
lifeCycle::::onDestroy
lifeCycle::::onCreate
lifeCycle::::onStart
lifeCycle::::onResume
Activity的声明周期
