embedding v2 issue

[andreagr]

I have an issue while trying to upgrade my project to the embiddingv2 required.
I followed these instructions: https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects updating my MainActivity.kt, and manifest, but when I try to run i get this:

../Application.kt: (16, 48): Type mismatch: inferred type is PluginRegistry? but FlutterEngine was expected

My Application.kt is:

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

class Application : FlutterApplication(), PluginRegistry.PluginRegistrantCallback {
    override fun onCreate() {
        super.onCreate()

        FlutterFirebaseMessagingService.setPluginRegistrant(this);
    }

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

[aktug]

Hi @andreagr
replace with :

class MainApplication : FlutterApplication(), PluginRegistrantCallback {

    override fun onCreate() {
        super.onCreate()
        FlutterFirebaseMessagingService.setPluginRegistrant(this);
    }

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

}