Firebase Messaging-handle Background Message In Kotlin

I'm using firebase_messaging in my flutter application. To handle background messages with firebase messaging in pub they suggested to create new Application.java file and replace

Solution 1:

Here is the working background notification kotlin code:

package com.example.yourapp

import io.flutter.app.FlutterApplication
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback
import io.flutter.plugins.GeneratedPluginRegistrant
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService

classApplication : FlutterApplication(), PluginRegistrantCallback {

    overridefunonCreate() {
        super.onCreate()
        FlutterFirebaseMessagingService.setPluginRegistrant(this);
    }

    overridefunregisterWith(registry: PluginRegistry?) {
        io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin.registerWith(registry?.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
    }
}

Solution 2:

Here is the Kotlin code for the new firebase cloud messaging version:

package id.your.app
    
import io.flutter.app.FlutterApplication
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback
import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingBackgroundService
// import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPluginclassApplication : FlutterApplication(), PluginRegistrantCallback {
  overridefunonCreate() {
    super.onCreate()
    FlutterFirebaseMessagingBackgroundService.setPluginRegistrant(this)
  }

  overridefunregisterWith(registry: PluginRegistry?) {
    // FlutterFirebaseMessagingPlugin.registerWith(registry?.registrarFor("io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin"))
  }
}