activity-fragment-view的回调和日志

activity回调日志

application.registerActivityLifecycleCallbacks(new LogActivityCallback())//每个回调里打日志即可

fragment回调日志

在上面的ActivityLifecycleCallbacks里的onActivityCreated(activity,instance)回调里,

调用:

if(!(activity instanceof FragmentActivity)){
            return;
}
FragmentActivity fragmentActivity = (FragmentActivity) activity;
fragmentActivity.getSupportFragmentManager().registerFragmentLifecycleCallbacks(new LogFragmentCalback(),true);

test editxxx

view的生命周期:

一图流

view的onWindowFocusChanged基本上=activity的onResume 和onPause.

且onWindowFocusChanged在onDraw后执行,对于静态view,可以用来getMesuredWith()获取宽高.

当然,如果要感知外层activity或fragment的生命周期,最好还是使用lifecycle组件.

依赖

  api 'androidx.lifecycle:lifecycle-common-java8:2.2.0'

view上实现:

implements DefaultLifecycleObserver

然后愉快玩耍