How can I prevent to display FCM notification on Flutter app background?

Question

Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  print('Handling a background message ${message.messageId}');
}

FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);

I can display background notifications with these snippet codes. But is there any way to not display some specific notification in the background?

For example I don't want to display notifications with data = {title = "call"}

Solution

from the sender device u have to send data only notification

await http.post(
          Uri.parse('https://fcm.googleapis.com/fcm/send'),
          headers: <String, String>{
            'Content-Type': 'application/json; charset=UTF-8',
            'Authorization': 'key=$serverKey',
          },
          body: jsonEncode(
            <String, dynamic>{
              'data': <String, dynamic>{
                'id': '2',
                'status': 'done'
              },
              'to': userToken,
              "collapse_key": uid,
            },
          ),
        );

Comments

[Ali Izadyar]

found the solution? I have the same problem

[saeid]

in _firebaseMessagingBackgroundHandler function we don't implement anything to display notification, automatically displayed if we pass the empty function to FirebaseMessaging.onBackgroundMessage

[Benyamin Beyzaie]

this method is not related to this topic if you don't write this function at all the notification will appear! so it is not helpful...

[PeakGen]

Data only notifications will not show up in iOS if the device is rebooted. It will show again if the user opens the app.

[Husen]

@PeakGen The purpose of data-only notification is not to show up, I tested this approach and it worked on android, I am not sure about IOS.