Flutterfire: [firebase_messaging 6.0.1] W/FirebaseMessaging(11255): Missing Default Notification Channel metadata in AndroidManifest. Default value will be used.

[alter123]

Describe the bug
During onLaunch & onMessage background messages the following error has been thrown: W/FirebaseMessaging(11255): Missing Default Notification Channel metadata in AndroidManifest. Default value will be used.

To Reproduce
Steps to reproduce the behavior:

1. Add firebase_messaging to pubspec.yaml.
2. Add class path to [project]/android/build.gradle file. and apply plugin to [project]/android/app/build.gradle.
3. Add .Application class as mentioned here to android\app\src\main\java\com\example\appdev\MainActivity.java
4. Configure androidmanifest.xml as follows:

     <application
        android:name=".Application"
        android:label="appdev"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize"
            android:screenOrientation="portrait"> 
            <meta-data
                android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
                android:value="true" />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
            <intent-filter>
                <action android:name="FLUTTER_NOTIFICATION_CLICK" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
            <meta-data
                android:name="com.google.firebase.ml.vision.DEPENDENCIES"
                android:value="ocr" />
        </activity>
    </application>

1. Configure firebase in main as follows:

    _firebaseMessaging.configure(
      onMessage: (Map<String, dynamic> message) async {
        // Notification while the app is open

        print('onMessage: $message');
        _handlePushNotification(message);
      },
      onLaunch: (Map<String, dynamic> message) async {
        // Clicked on notification

        print('onlaunch: $message');
        _handlePushNotification(message);
      },
      onResume: (Map<String, dynamic> message) async {
        // App running in background

        print('onResume: $message');
        _handlePushNotification(message);
      },
      onBackgroundMessage: myBackgroundMessageHandler,
    );

1. Send message using curl as mentioned here

Expected behavior
The messages for onMessage is recieved but, the onResume and onLaunch should be called upon receiving notification. Although the error has been thrown.

Additional Context
I've referenced for the same from #1478 #88 #343 #1357 , but none seemed to work.

[iapicca]

Hi @jayvasantjv
could you please provide your updated flutter doctor -v
and your flutter run --verbose?
Thank you

[alter123]

logs from flutter doctor
logs from flutter run --verbose

Sorry for limited data in --verbose output since my shell can list only that much data. I hope all the requried details are captured.

[digarahayu17]

I got same issue even i add meta data in manifest and create strings.xml that contain default channel id still get same error. I use flutter sdk stable version....
Anybody how to make it work in android Oreo 8.0 up to...
In android lower 8.0 all is work fine

[digarahayu]

Any update for this issue..?
or it will be fix when stable version updated???

[ankii9600]

this is a bug in firebase messging plugin .. as they dont provide default notification channel id ..
for fix :

class MyApplication : FlutterApplication(), PluginRegistrantCallback {
    override fun onCreate() {
        super.onCreate()
        this.registerChannel();
        FlutterFirebaseMessagingService.setPluginRegistrant(this)
    }

    override fun registerWith(registry: PluginRegistry) {
        GeneratedPluginRegistrant.registerWith(registry)
    }


    @TargetApi(Build.VERSION_CODES.O)
    private fun registerChannel(){
        val channel: NotificationChannel = NotificationChannel(
                getString(R.string.default_notification_channel_id),
                "CiggyGhar Delivery",
                NotificationManager.IMPORTANCE_HIGH
        ).also {

            it.setSound(Uri.parse("android.resource://${packageName}/${R.raw.deduction}"), it.audioAttributes)
        }
        val manager:NotificationManager = getSystemService(NotificationManager::class.java) as NotificationManager
        manager.createNotificationChannel(channel)
    }
}

Next Add this to AndroidManifest file

<meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="@string/default_notification_channel_id"/>

also define value in string.xml

but this did'nt work...
A little Hack

---

Add Same Above in firebase_messaging plugins .. AndroidManifest.xml
also define value in string.xml

That worked for me ..
You need to do a little work around

[digarahayu]

this is a bug in firebase messging plugin .. as they dont provide default notification channel id ..
for fix :

class MyApplication : FlutterApplication(), PluginRegistrantCallback {
    override fun onCreate() {
        super.onCreate()
        this.registerChannel();
        FlutterFirebaseMessagingService.setPluginRegistrant(this)
    }

    override fun registerWith(registry: PluginRegistry) {
        GeneratedPluginRegistrant.registerWith(registry)
    }


    @TargetApi(Build.VERSION_CODES.O)
    private fun registerChannel(){
        val channel: NotificationChannel = NotificationChannel(
                getString(R.string.default_notification_channel_id),
                "CiggyGhar Delivery",
                NotificationManager.IMPORTANCE_HIGH
        ).also {

            it.setSound(Uri.parse("android.resource://${packageName}/${R.raw.deduction}"), it.audioAttributes)
        }
        val manager:NotificationManager = getSystemService(NotificationManager::class.java) as NotificationManager
        manager.createNotificationChannel(channel)
    }
}

Next Add this to AndroidManifest file

<meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="@string/default_notification_channel_id"/>

also define value in string.xml

but this did'nt work...
A little Hack

Add Same Above in firebase_messaging plugins .. AndroidManifest.xml
also define value in string.xml

That worked for me ..
You need to do a little work around

i already try Missing Default Notification Channell was not appears...
but notification not working onResume and onLaunch even i send channel id on payload...
i try to send wrong channel_id there is log missing channel id, but when i send payload with correct channel id not log anymore and onResume , onLaunch not fire
FYI i use
flutter sdk stable version

[marinat]

@ankii9600 onResume and onLoad works on your android device?

[br-programmer]

este es un error en el complemento de mensajería firebase ... ya que no proporcionan la identificación del canal de notificación predeterminada ...
para solucionarlo:

class MyApplication : FlutterApplication(), PluginRegistrantCallback {
    override fun onCreate() {
        super.onCreate()
        this.registerChannel();
        FlutterFirebaseMessagingService.setPluginRegistrant(this)
    }

    override fun registerWith(registry: PluginRegistry) {
        GeneratedPluginRegistrant.registerWith(registry)
    }


    @TargetApi(Build.VERSION_CODES.O)
    private fun registerChannel(){
        val channel: NotificationChannel = NotificationChannel(
                getString(R.string.default_notification_channel_id),
                "CiggyGhar Delivery",
                NotificationManager.IMPORTANCE_HIGH
        ).also {

            it.setSound(Uri.parse("android.resource://${packageName}/${R.raw.deduction}"), it.audioAttributes)
        }
        val manager:NotificationManager = getSystemService(NotificationManager::class.java) as NotificationManager
        manager.createNotificationChannel(channel)
    }
}

Siguiente Agregar esto al archivo AndroidManifest

<meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="@string/default_notification_channel_id"/>

También defina el valor en string.xml

pero esto no funcionó ...
Un pequeño truco

Agregue lo mismo arriba en plugins firebase_messaging. AndroidManifest.xml
también define el valor en string.xml

Eso funcionó para mí.
Necesitas hacer un poco de trabajo

Que debo agregar en el String?