相关疑难解决方法(0)

我正在使用FCM向Android设备发送通知.当应用程序处于后台时,如果我发送10个通知,则设备将在通知栏上显示10个条目.

我希望FCM在通知栏上只输入一个条目,即较新的条目将覆盖旧条目.我在https://firebase.google.com/docs/cloud-messaging/http-server-ref#downstream上找不到设置密钥的密钥.

有办法吗,或者不可能？谢谢.

我尝试实现这样的组通知android group notification和ios group notification。但我做不到。我也试过这个flutter_local_notification插件。但这仅在应用程序打开时有效。不在前台（onResume）和后台工作。

  void registerNotification() {
    
    _fcm.configure(
        onMessage: (Map<String, dynamic> message) {
          return;
        },
        onResume: (Map<String, dynamic> message) {
            return;
        },
        onLaunch: (Map<String, dynamic> message) {
          return;
        },
        onBackgroundMessage: backgroundMessageHandler);
  }

有效载荷

const payload = {
  notification: {
    title: title,
    body: message,
  },
  data: {
    click_action: "FLUTTER_NOTIFICATION_CLICK",
    sound: "default"
  },
  android: {
    priority: "high",
    collapse_key: userName,//tried to add collapse_key for group notification
  },
  apns: {
    headers: {
      "apns-priority": "5",
    },
  },
  token:token, …

我Firebase Cloud Messaging用来从我的服务器发送推送通知到我的Android应用程序.

当应用程序运行时,通知会堆叠,因为我将它们设置为我的组中的组FirebaseMessagingService.这很好.

但是,当应用程序未运行时,通知不会堆叠,并且每个通知都会单独显示.这不好.

即使应用程序未运行,如何确保通知堆叠？

这是我的FirebaseMessagingService样子:

public class MyFcmListenerService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        RemoteMessage.Notification notification = remoteMessage.getNotification();

        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)

                .setSmallIcon(R.drawable.notif_white)
                .setLargeIcon(BitmapFactory.decodeResource(getApplicationContext().getResources(), R.drawable.notif_white))
                .setContentTitle(getResources().getString(R.string.app_name))
                .setContentText(notification.getBody())
                .setAutoCancel(true)
                .setPriority(2)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent)
                .setGroup("1")
                .setGroupSummary(true)
                .setOnlyAlertOnce(true);


        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0 , notificationBuilder.build());

        }
    }