生命周期:
onCreate -> onStart/onRestart -> onResume -> onPause -> onStop -> onDestroy
场景1:A页面跳B页面,然后finish B页面。此过程中A的生命周期为:onPaused -> onStop -> onRestart -> onResume;
场景2:A页面按home键:onPause -> onStop;
启动方式:
通过指定类名显示启动(最常用):
startActivity(new Intent(this, Target.class));