public class MyApplication extends Application { private List<Activity> activityList = new LinkedList<Activity>(); private static MyApplication instance; private MyApplication() { } //单例模式中获取唯一的MyApplication实例 public static MyApplication getInstance() { if(null == instance) { instance = new MyApplication(); } return instance; } //添加Activity到容器中 public void addActivity(Activity activity) { activityList.add(activity); } //遍历所有Activity并finish public void exit() { for(Activity activity:activityList) { activity.finish(); } System.exit(0); } }

MyApplication.getInstance().addActivity(this);