backgroundMessageCallback not working on huawei push plugin

Hi, I have implemented HMS push kit and everything is working fine except background message handler, Push.onMessageReceivedStream is working fine but when I send notification when app is on background I get error in backgroundMessageCallback, I get the following error

Unhandled Exception: MissingPluginException(No implementation found for method localNotification on channel com.huawei.flutter.push/method)

I am posting my code below, please let me know if any additional code required, thanks 😃

version on pubsec : huawei_push: ^5.0.2+301

My Application class

import com.huawei.hms.flutter.push.PushPlugin
import io.flutter.app.FlutterApplication
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugins.GeneratedPluginRegistrant
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService

class MainApplication : FlutterApplication(), PluginRegistry.PluginRegistrantCallback {

    override fun onCreate() {
        super.onCreate()
        PushPlugin.setPluginRegistrant(this)

    }

    override fun registerWith(registry: PluginRegistry?) {
        registry?.registrarFor("com.huawei.hms.flutter.push.PushPlugin");
    }
}

My HMS helper function ( which I call on main.dart)

 static void backgroundMessageCallback(RemoteMessage remoteMessage) async {
    String data = remoteMessage.data;
    Push.localNotification({
      HMSLocalNotificationAttr.TITLE: '[Headless] DataMessage Received',
      HMSLocalNotificationAttr.MESSAGE: 'Hello My Name'
    });
    print("onRemoteMessageReceived" + " Data: " + data);
  }

  static initNotification() async {
    TokenEventChannel.receiveBroadcastStream()
        .listen(_onTokenEvent, onError: _onTokenError);
    Push.onNotificationOpenedApp.listen(_onNotificationOpenedApp);
    var initialNotification = await Push.getInitialNotification();
    Push.onMessageReceivedStream
        .listen(_onMessageReceived, onError: _onMessageReceiveError);
    bool backgroundMessageHandler =
        await Push.registerBackgroundMessageHandler(backgroundMessageCallback); // returns true
    await Push.getToken("");
    await Push.turnOnPush();
  }
`

manifiest

 <
application
        android:name=".MainApplication"

        <!-- Set push kit auto enable to true (for obtaining the token on initialize)-->
        <meta-data
            android:name="push_kit_auto_init_enabled"
            android:value="true" />
        <!-- These receivers are for sending scheduled local notifications -->
        <receiver android:name="com.huawei.hms.flutter.push.receiver.local.HmsLocalNotificationBootEventReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>
        <receiver android:name="com.huawei.hms.flutter.push.receiver.local.HmsLocalNotificationScheduledPublisher"
            android:enabled="true"
            android:exported="true">
        </receiver>

        <receiver android:name="com.huawei.hms.flutter.push.receiver.BackgroundMessageBroadcastReceiver"
            android:enabled="true" android:exported="true">
            <intent-filter>
                <action android:name="com.huawei.hms.flutter.push.receiver.BACKGROUND_REMOTE_MESSAGE" />
            </intent-filter>
        </receiver>

        <provider
            android:authorities="${applicationId}.HMSContentProvider"
            android:name="com.huawei.hms.flutter.analytics.AnalyticsContentProvider"/>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
</manifest>

build grade

buildscript {
    ext.kotlin_version = '1.3.72'
    repositories {
        google()
        jcenter()
        maven { url 'https://developer.huawei.com/repo/' }

        flatDir { dirs 'libs' }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.3'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.3'
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.2.0'
        classpath 'com.huawei.agconnect:agcp:1.4.1.300'

    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven { url 'https://developer.huawei.com/repo/' }
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

[anas-iqbal]

Hello @aktug

Finally got it working with flutterEmbedding v2, after registering the plugin manually in my application class. Below is my updated application class

class MainApplication : FlutterApplication(), PluginRegistry.PluginRegistrantCallback {

    override fun onCreate() {
        super.onCreate()
        PushPlugin.setPluginRegistrant(this)
    }

    override fun registerWith(registry: PluginRegistry?) {
        if (!registry!!.hasPlugin("com.huawei.hms.flutter.push.PushPlugin")) {
            PushPlugin.registerWith(registry?.registrarFor("com.huawei.hms.flutter.push.PushPlugin"))
        }
    }
}

I think we have manually register the v1 plugins in v2 projects in order to use them.

[anas-iqbal]

I know its an old and closed issue, but just for an update so if may help anyone, I ended up using flutter local notification plugin along with this plugin for handling data payload. 😃