自动删除 Firebase 通知

Question

我有一个问题，我已经阅读了 Make notification disappear after 5 minutes and Clearing notification after a few seconds，但我仍然不明白他们所说的删除通知的部分。我的 phone 收到一个传入的 firebase 通知，如果用户没有点击它，我希望在 20 秒后自动收到通知 removed/disappear。我可以知道如何实现它吗？

P.S 我也阅读了有关服务的内容。我是 Java 语言的新手，在尝试一个小演示时就学会了。 https://developer.android.com/guide/components/services.html

每当我收到通知时，我的以下代码都会使我的应用程序崩溃。任何帮助将不胜感激。

已编辑：功能齐全。供大家参考

        private void removeNotification()
{
    long delayInMilliseconds = 20000; 
    final Timer timer = new Timer();
    timer.schedule(new TimerTask() {
        @Override
        public void run()
        {
            NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            manager.cancel(0);
            timer.cancel();
        }
    }, delayInMilliseconds, 1000);
}

Answer 1

根据我已经实施的创建新 class 和扩展 FirebaseMessagingService

您可以编写以下代码来发送通知：

 private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("TEST NOTIFICATION")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

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

        notificationManager.notify(0, notificationBuilder.build());
    }

为取消通知创建新方法并编写以下代码：

Handler h = new Handler();
    long delayInMilliseconds = 20000;
    h.postDelayed(new Runnable() {
        public void run() {
            notificationManager.cancel(id);
        }
    }, delayInMilliseconds);

Answer 2

是的，这很容易。如果用户未阅读通知，则在您收到通知的地方添加一个处理程序，然后删除通知。

@Override
public void onMessageReceived(RemoteMessage message) {
sendNotification(message.getData().toString);
}

添加通知码

private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("TEST NOTIFICATION")
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        int id = 0;
        notificationManager.notify(id, notificationBuilder.build());
        removeNotification(id);
    }

取消通知代码。

private void removeNotification(int id) {
Handler handler = new Handler();
    long delayInMilliseconds = 20000;
    handler.postDelayed(new Runnable() {
        public void run() {
            notificationManager.cancel(id);
        }
    }, delayInMilliseconds);
}

自动删除 Firebase 通知

Auto Remove Firebase Notifications

android

firebase-notifications