Activity生命周期总结

Posted 2023-02-05 bdmh

Activity生命周期总结

方式	生命周期	备注
单一Activity（启动）	onCreate onStart onResume
单一Activity（关闭）	onStop onDestroy
①MainActivity中打开TestActivity	MainActivity: onPause TestActivity: onCreate TestActivity: onStart TestActivity: onResume MainActivity: onStop	注意TestActivity的周期加在MainActivity之间，而不是连续完成每一个
上面情况中关闭TestActivity	TestActivity: onPause MainActivity: onRestart MainActivity: onStart MainActivity: onResume TestActivity: onStop TestActivity: onDestroy	注意顺序
②TestActivity中打开Dialog	TestActivity无影响	AlertDialog.Builder normalDialog = new AlertDialog.Builder(TestActivity.this);
②中的Dialog中打开ThirdActivity	TestActivity: onPause ThirdActivity: onCreate ThirdActivity: onStart ThirdActivity: onResume TestActivity: onStop
上面情况中关闭ThirdActivity	ThirdActivity: onPause TestActivity: onRestart TestActivity: onStart TestActivity: onResume ThirdActivity: onStop ThirdActivity: onDestroy
TestActivity中打开ThirdActivity ThirdActivity设置为透明	TestActivity: onPause ThirdActivity: onCreate ThirdActivity: onStart ThirdActivity: onResume	因为ThirdActivity透明，TestActivity处于可见状态，所以TestActivity没有onStop和onDestroy
关闭上面情况中的ThirdActivity	ThirdActivity: onPause TestActivity: onResume ThirdActivity: onStop ThirdActivity: onDestroy	原因同上
TestActivity中打开ThirdActivity ThirdActivity设置Dialog主题	TestActivity: onPause ThirdActivity: onCreate ThirdActivity: onStart ThirdActivity: onResume
关闭上面情况中的ThirdActivity	ThirdActivity: onPause TestActivity: onResume ThirdActivity: onStop ThirdActivity: onDestroy
TestActivity横屏 由横屏切换成竖屏	TestActivity: onConfigurationChanged TestActivity: onPause TestActivity: onStop TestActivity: onDestroy TestActivity: onCreate TestActivity: onStart TestActivity: onRestoreInstanceState TestActivity: onResume	不设置orientation|keyboardHidden|screenSize，设置后，不影响TestActivity的生命周期
退到后台	TestActivity: onPause TestActivity: onStop
返回前台	TestActivity: onRestart TestActivity: onStart TestActivity: onResume