[firebase_messaging] functions are not triggered inside notification callback

[apoleo88]

When a notification arrives, it triggers correctly onMessage(and the others), but it doesn't trigger the function call inside it.

_fcm.configure(
      onMessage: (Map<String, dynamic> message) async {
        print("onMessage: $message"); // this is printed
        // static function:
        thisWeirdNotification(message['data']); // this is not called
      },
      ...
)

onMessage: {
  notification: {title: "yeaah", body: null},
  data: {channel_id: "chanel-name", info: "1", click_action: FLUTTER_NOTIFICATION_CLICK}
}

[√] Flutter (Channel master, 1.23.0-8.0.pre.124, on Microsoft Windows [Versione 10.0.19041.508], locale it-IT)
    • Flutter version 1.23.0-8.0.pre.124 at C:\src\flutter
    • Framework revision cbf1e135c4 (3 days ago), 2020-10-02 21:57:04 -0700
    • Engine revision 87a10f240f
    • Dart version 2.11.0 (build 2.11.0-181.0.dev)


[√] Android toolchain - develop for Android devices (Android SDK version 30.0.1)
    • Android SDK at C:\Users\_Apoleo\AppData\Local\Android\sdk
    • Platform android-30, build-tools 30.0.1
    • Java binary at: C:\Users\_Apoleo\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-1\193.6626763\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[√] Android Studio (version 4.0)
    • Android Studio at C:\Users\_Apoleo\AppData\Local\JetBrains\Toolbox\apps\AndroidStudio\ch-1\193.6626763
    • Flutter plugin version 47.1.1
    • Dart plugin version 192.8052
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[√] Connected device (1 available)
    • sdk gphone x86 (mobile) • emulator-5554 • android-x86 • Android 11 (API 30) (emulator)

• No issues found!

I am not sure what's happening because the execution truncates without errors, is it suppressing one?

[masterplox]

Is it possible that thisWeirdNotification() is also an async method. Meaning, you'd need to call await thisWeirdNotification() instead?

I've ran into this problem before and that was my mistake, not putting that await keyword before my async method names.

[apoleo88]

Yes, it is async, but but the await doesn't solve the issue.

I found the error, it is a data type one.
The parameter sent message['data'] was a LinkedHashMap<dynamic, dynamic> type, but my function accepted a Map<String, dynamic>.

thisWeirdNotification(Map<String, dynamic> data) async{...}

So, I guess that somehow the error is been suppressed!

[masterplox]

I've found that what helps me to debug is to put everything that is bound to have some sort of logic that can cause errors, in a try/catch block. Then debugPrinting out the catch exception. Then placing my breakpoint where I wrote that line to print. e.g

try {
    ///Some weird logic
}catch(e){
    debugPrint(e.toString()); 
}

It could help you to find future errors like these. And honestly, ever since I moved to JsonSerializable, errors like that haven't gotten to me.

[apoleo88]

Yep, like that the error comes out:
I/flutter (27070): type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>'

[darshankawar]

@apoleo88
It seems your original issue has been resolved. Can this issue be closed ?
Thanks.

[apoleo88]

@apoleo88
It seems your original issue has been resolved. Can this issue be closed ?
Thanks.

My issue is solved, but it is not clear to me why the debug error is been surpressed.

[p02diada]

I have the same problem, it's very hard to debug a callback error

[thesmalleyes]

I have the same problem, because I added

<service
     android:name="com.clevertap.android.sdk.pushnotification.fcm.FcmMessageListenerService">
     <intent-filter>
           <action android:name="com.google.firebase.MESSAGING_EVENT"/>
     </intent-filter>
</service>

But I need to add this service, because of the clevertap plugin needs it to render the notification. Is there any way to merge this service and FCM flutter who does not need this?