在AppDestroy之后重新打开PendingIntent

Question

我的App中的PendingIntent存在问题。

我将GCM消息从我的服务器发送到我的应用程序。当用户点击通知时，将创建一个新的PendingIntent，将用户移动到＆＃34; AlertActivity＆＃34;，开始倒计时

目前所有这些都很好。

现在问题是，当用户关闭应用程序并重新打开它时。 倒计时正在运行时，我想再次将用户重定向到AlertActivity。

这怎么可能？

我用以下内容启动Intent：

private void sendNotification(String msg) {
        Intent resultIntent = new Intent(this, AlertActivity.class);
        resultIntent.putExtra("msg", msg);
        PendingIntent resultPendingIntent = PendingIntent.getActivity(this, 0,
                resultIntent, 0);


        NotificationCompat.Builder mNotifyBuilder;
        NotificationManager mNotificationManager;

        mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        mNotifyBuilder = new NotificationCompat.Builder(this)
                .setContentTitle("Alert")
                .setContentText("You've received new message.")
                .setSmallIcon(R.drawable.ic_launcher);
        // Set pending intent
        mNotifyBuilder.setContentIntent(resultPendingIntent);

        // Set Vibrate, Sound and Light
        int defaults = 0;
        //defaults = defaults | Notification.DEFAULT_LIGHTS;
        //defaults = defaults | Notification.DEFAULT_VIBRATE;
        // defaults = defaults | Notification.DEFAULT_SOUND;

        Notification notification = mNotifyBuilder.build();

        notification.flags |= Notification.FLAG_AUTO_CANCEL;
        notification.sound = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.alarm);
        notification.defaults |= Notification.DEFAULT_VIBRATE;

        mNotifyBuilder.setDefaults(defaults);
        // Set the content for Notification
        mNotifyBuilder.setContentText("New message from Server");
        // Set autocancel
        mNotifyBuilder.setAutoCancel(true);
        // Post a notification
        mNotificationManager.notify(notifyID, notification);
}