public class BaseActivity extends Activity {

    private BroadcastReceiver recvExit;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        MyApplication.getActivityList().addActivity(this);//方式1 以前的方式--記錄和遍歷


        recvExit = new
 
 BroadcastReceiver() {//方式2 新的方式-廣播
            @Override
            public void onReceive(Context context, Intent intent) {
                if (intent.getAction().equals("EXIT_APP")){
                    finish();
                }
            }
        };

        IntentFilter filter = new IntentFilter();
        filter.addAction(
 
"EXIT_APP");

        registerReceiver(recvExit, filter);
    }

    @Override
    protected void onDestroy() {
        //MyLog.i(TAG, " destroy!");
        MyApplication.getActivityList().removeActivity(this);//方式1

        try {
            unregisterReceiver(recvExit);//方式2
        }catch (Exception e){
        }

        
 
super.onDestroy(); // Always call the superclass
    }
}

銷燬的時候呼叫函式
    public void finishAll() { //方式1
        for (Activity activity : activityList) {
            if (activity != null) {
                activity.finish();
            }
        }
    }
    public void finishAll() {//方式2
        Intent intent = new Intent("EXIT_APP");
        MyApplication.getAppContext().sendBroadcast(intent);
    }