ActivityManager

public List<ActivityManager.AppTask> getAppTasks ()

Added in  API level 21

Get the list of tasks associated with the calling application.

Returns

The list of tasks associated with the application making this call. ================================================================

ActivityManager.AppTask（Added in API level 21）

public void finishAndRemoveTask ()

Added in  API level 21

Finishes all activities in this task and removes it from the recent tasks list.

所以下面的方法，可以销毁当前应用所有Activity并且将此任务从最近任务列表中移除。

List<AppTask> appTasks = mActivityManager.getAppTasks(); for (AppTask at : appTasks) { at.finishAndRemoveTask(); }

请注意，以上API是在API21 新引入的，21以下版本将不能使用。

Application

public void registerActivityLifecycleCallbacks (Application.ActivityLifecycleCallbacks callback)

Added in  API level 14

Application.ActivityLifecycleCallbacks

abstract void onActivityCreated( Activity activity,  Bundle savedInstanceState) abstract void onActivityDestroyed( Activity activity)

在API21 以下可以用Application注册Activity生命周期回调，进行Activity管理。

private static List<Activity> activities = new ArrayList<Activity>(); @Override public void onActivityCreated(Activity activity, Bundle savedInstanceState) { if(!activity.isChild()){ activities.add(activity); } } @Override public void onActivityDestroyed(Activity activity) { if(!activity.isChild()){ activities.remove(activity); } } 结合 http://www.cnblogs.com/zhujiabin/p/5674982.html 可以较好的实现App应用程序的退出。