FirebaseMessaging.onBackgroundMessage is not invoked when my app is on background in flutter , its happening only in Ios devices

Question

I Am making an app which has push notification Property app is working when we hit notification on the foreground , but when app is on background my _backgroundHandler() method is not invoking, its happening only In IOS App Only

score 6 · Answer 1 · answered Sep 23 '22 at 13:39

also struggle this issue.

set payload as below. mutable-content make sense.

apns: {
    payload: {
        aps: {
            'mutable-content': 1, 
            'content-available': 1
        }
    }
}

https://github.com/firebase/flutterfire/issues/9381#issuecomment-1229167020

set "mutable-content:1" in payloads, iOS passes the notification to our notification service app extension.

For more information APNs payload, see the following links:

https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/generating_a_remote_notification

'content-available': 1 did the trick for me – jola Mar 27 '23 at 18:55 — jola, Mar 27 '23 at 18:55

Kaushik Chandru · Answer 2 · 2022-07-06T13:11:04.440

3

Enable background fetch, background processing and remote notification in Xcode

Edit

Add mutable key to payload

{ "to": "dWdhfjfjdbzbmjJ5....", "content_available": true, "mutable_content": true,

"data": { "message": "some msg", "mediaUrl": "image url here" },

"notification": { "body": "notification msg", "sound": "default" } }

EDIT


var payload = {
    notification: {
      title: `msg title here`,
      body: `msg body here`
      }`,
    },
    // Set Android priority to "high"
    android: {
      priority: "high",
    },
    // Add APNS (Apple) config
    apns: {
      payload: {
        aps: {
          contentAvailable: true,
        },
      },
      headers: {
        //"apns-push-type": "background", // This line prevents background notification
        "apns-priority": "10",
      },
    },
    token: "dnqTQVso60GfnnuOjHv8_e:APA91bElr-K3xkQMdYHX8VMrasdfasdfkjhasidfgjn"
 };

edited Jul 06 '22 at 13:11

answered Jul 06 '22 at 11:09

Kaushik Chandru

15,510
2
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30

Already did it, but same problem exists , I am sucking on it for 5 days I did not find any solution of that – Choudhary Robin Singh Jul 06 '22 at 11:20
Also did you add permission to allow sound alert and badge? – Kaushik Chandru Jul 06 '22 at 11:42
yes i also allowed – Choudhary Robin Singh Jul 06 '22 at 12:27
All other push notifications are working? – Kaushik Chandru Jul 06 '22 at 12:33
yes all working in forground also – Choudhary Robin Singh Jul 06 '22 at 12:38
in android, all state notifications are working , means foreground,background,and also kill state – Choudhary Robin Singh Jul 06 '22 at 12:40
sory to say but already added this in my payload but same result no message received in background handler – Choudhary Robin Singh Jul 06 '22 at 12:49
Try setting priority too ib apns – Kaushik Chandru Jul 06 '22 at 12:51
from app developer?? – Choudhary Robin Singh Jul 06 '22 at 12:56
https://firebase.google.com/docs/cloud-messaging/concept-options#setting-the-priority-of-a-message – Kaushik Chandru Jul 06 '22 at 12:59
"apns-priority":"5" did it like this but same result – Choudhary Robin Singh Jul 06 '22 at 13:02
i have an update in my ios mobile is this the issue ?? – Choudhary Robin Singh Jul 06 '22 at 13:05
No an update available cannot be an issue. Should be some settings that's missing. Are you getting notification when the app is in foreground – Kaushik Chandru Jul 06 '22 at 13:07
yes i getting the notification when app is forground – Choudhary Robin Singh Jul 06 '22 at 13:09
And if i used content_available true it's showing 2 notifications first firebase server then it comes to my modified notification (means if I used content_available true notification is coming in the background but first notification shows silently then my original notification come with image – Choudhary Robin Singh Jul 06 '22 at 13:10
Added a payload.. Please try that one – Kaushik Chandru Jul 06 '22 at 13:13
already tried to added the paylod and check same result coming 2 notification – Choudhary Robin Singh Jul 06 '22 at 13:13
first silently (Like when we send through direct firebase messaging server ) and second one is my modified notfication – Choudhary Robin Singh Jul 06 '22 at 13:14
Same problem with small body , notification also coming twice – Choudhary Robin Singh Jul 07 '22 at 04:38
Same issue here, all of a sudden it is not working. When I then opens the app the notifications arrives via local notifications package – kragekjaer Aug 07 '22 at 14:13

score 1 · Answer 3 · answered Jan 14 '23 at 16:56

1

Adding this in my payload solved my issue:

apns: {
    payload: {
        aps: {
            'mutable-content': 1, 
            'content-available': 1
        }
    }
}

answered Jan 14 '23 at 16:56

Shahrukh Khan

11
1

score 0 · Answer 4 · answered Oct 13 '22 at 07:48

I have face this issue too.

@goza's answer should been accepted.

This is my sending json.

{
   "message":{
      "token":"fcm token",
      "notification":{
         "title":"NotifyTitle",
         "body":"NotifyBody"
      },
      "data":{
         "title":"DataTitle",
         "body":"DataBody"
      },
      "apns":{
          "payload":{
             "aps":{
                "content-available":1
             }
          }
       }
   }
}

FirebaseMessaging.onBackgroundMessage is not invoked when my app is on background in flutter , its happening only in Ios devices

4 Answers4