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public class MyActivityLifecycleCallbacks implements Application.ActivityLifecycleCallbacks { private int foregroundActivities; private boolean hasSeenFirstActivity; private boolean isChangingConfiguration; @Override public void onActivityCreated(Activity activity,Bundle savedInstanceState) { } @Override public void onActivityStarted(Activity activity) { mForegroundActivities++; if (hasSeenFirstActivity && foregroundActivities == 1 && !isChangingConfiguration) { applicationDidEnterForeground(activity); } hasSeenFirstActivity = true; isChangingConfiguration = false; } @Override public void onActivityResumed(Activity activity) { } @Override public void onActivityPaused(Activity activity) { } @Override public void onActivityStopped(Activity activity) { foregroundActivities--; if (foregroundActivities == 0) { applicationDidEnterBackground(activity); } isChangingConfiguration = activity.isChangingConfigurations(); } @Override public void onActivitySaveInstanceState(Activity activity,Bundle outState) { } @Override public void onActivityDestroyed(Activity activity) { } }
实现了自己的类之后,就可以调用Application的registeractivityLifecycleCallback方法,将我们的类MyActivityLifecycleCallbacks注册进去,这样就可以实现对Activity生命周期的监听了。
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