I'm in a trouble with Application.kt file in flutter-CodePudding

My Application.kt file is like this. Could't find a way for changing PluginRegistrantCallback and FlutterFirebaseMessagingService

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


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

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

ext.kotlin_version = '1.5.10' When I build the project I get this type error

e: /-/Application.kt: (6, 27): Unresolved reference: firebasemessaging
e: /-/Application.kt: (12, 9): Unresolved reference: FlutterFirebaseMessagingService
e: /-/Application.kt: (16, 28): Unresolved reference: firebasemessaging

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugKotlin'.
> Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 13s
Exception: Gradle task assembleDebug failed with exit code 1

CodePudding user response：

Try This,

package your_package_name

import io.flutter.app.FlutterApplication
import io.flutter.plugin.common.PluginRegistry

import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin

class Application() : FlutterApplication(), PluginRegistry.PluginRegistrantCallback {
  override fun registerWith(registry: PluginRegistry?) {
      val key: String? = FlutterFirebaseMessagingPlugin::class.java.canonicalName
      if (!registry?.hasPlugin(key)!!) {
          FlutterFirebaseMessagingPlugin.registerWith(registry?.registrarFor("io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin"));
        }
    }
}

CodePudding user response：

You can register Firebase Messaging using FirebaseCloudMessagingPluginRegistrant. You can see the code below for better understanding:

package <package_name>

import io.flutter.app.FlutterApplication
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback
import io.flutter.plugins.GeneratedPluginRegistrant
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin


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

    override fun registerWith(registry: PluginRegistry?) {
        FirebaseCloudMessagingPluginRegistrant.registerWith(registry)
    }
}