[firebase_messaging] Type mismatch: inferred type is PluginRegistry? but FlutterEngine was expected #1613

Jacobsjj2 · 2019-12-12T01:30:55Z

Following the instructions on pub.dev for handling background messages doesn't compile for Android since the GeneratedPluginRegistrant.registerWith method takes a FlutterEngine object as a parameter. Using the PluginRegistry provided by the method throws the error

Type mismatch: inferred type is PluginRegistry? but FlutterEngine was expected

Please see the below code for reference

package ...

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

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

    override fun registerWith(registry: PluginRegistry?) {
        GeneratedPluginRegistrant.registerWith(registry) //Error thrown here
    }
}

To reproduce
Steps to reproduce the behavior:

Follow the steps in the given link up to step 1 of Optionally handle background messages
Build the project

Expected behavior
Somehow a FlutterEngine object should be passed to the method in order to successfully build for Android

The text was updated successfully, but these errors were encountered:

hsangtini · 2019-12-12T05:35:08Z

Fixed by 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");
    }

}

iapicca · 2019-12-12T14:24:36Z

Hi @Jacobsjj2
does the solution proposed by @hsangtini work for you?
thank you

Jacobsjj2 · 2019-12-12T17:18:18Z

This does allow me to compile, but I'm not sure if the background service is being registered correctly since I get the error

E/flutter (12123): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method FcmDartService#initialized on channel plugins.flutter.io/firebase_messaging_background)
E/flutter (12123): #0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:319:7)
E/flutter (12123): <asynchronous suspension>
E/flutter (12123): #1      _fcmSetupBackgroundChannel (package:firebase_messaging/firebase_messaging.dart:51:21)
E/flutter (12123): #2      _AsyncAwaitCompleter.start (dart:async-patch/async_patch.dart:45:6)
E/flutter (12123): #3      _fcmSetupBackgroundChannel (package:firebase_messaging/firebase_messaging.dart:24:32)
E/flutter (12123): #4      _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:239:25)
E/flutter (12123): #5      _rootRun (dart:async/zone.dart:1126:13)
E/flutter (12123): #6      _CustomZone.run (dart:async/zone.dart:1023:19)
E/flutter (12123): #7      _runZoned (dart:async/zone.dart:1518:10)
E/flutter (12123): #8      runZoned (dart:async/zone.dart:1502:12)
E/flutter (12123): #9      _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:231:5)
E/flutter (12123): #10     _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:307:19)
E/flutter (12123): #11     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)

Doesn't the replacement simply return a Registrar object without registering anything?

hsangtini · 2019-12-13T04:18:54Z

This does allow me to compile, but I'm not sure if the background service is being registered correctly since I get the error

E/flutter (12123): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method FcmDartService#initialized on channel plugins.flutter.io/firebase_messaging_background)
E/flutter (12123): #0      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:319:7)
E/flutter (12123): <asynchronous suspension>
E/flutter (12123): #1      _fcmSetupBackgroundChannel (package:firebase_messaging/firebase_messaging.dart:51:21)
E/flutter (12123): #2      _AsyncAwaitCompleter.start (dart:async-patch/async_patch.dart:45:6)
E/flutter (12123): #3      _fcmSetupBackgroundChannel (package:firebase_messaging/firebase_messaging.dart:24:32)
E/flutter (12123): #4      _runMainZoned.<anonymous closure>.<anonymous closure> (dart:ui/hooks.dart:239:25)
E/flutter (12123): #5      _rootRun (dart:async/zone.dart:1126:13)
E/flutter (12123): #6      _CustomZone.run (dart:async/zone.dart:1023:19)
E/flutter (12123): #7      _runZoned (dart:async/zone.dart:1518:10)
E/flutter (12123): #8      runZoned (dart:async/zone.dart:1502:12)
E/flutter (12123): #9      _runMainZoned.<anonymous closure> (dart:ui/hooks.dart:231:5)
E/flutter (12123): #10     _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:307:19)
E/flutter (12123): #11     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)

Doesn't the replacement simply return a Registrar object without registering anything?

Try this replace @Jacobsjj2

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

Jacobsjj2 · 2019-12-18T12:18:22Z

Sorry for the delay! @hsangtini's latest suggestion works. I guess it would also be necessary to update the documentation to that then?

jayvhaile · 2020-01-20T14:57:55Z

I tried your solution and i am getting

Supertypes of the following classes cannot be resolved. Please make sure you have the required dependencies in the classpath:
class io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService, unresolved supertypes: com.google.firebase.messaging.FirebaseMessagingService

isyantoID · 2020-01-29T12:30:21Z

Fixed by 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");
    }

}

tq work for me

insinfo · 2020-08-10T18:34:35Z

I also had this problem, I changed the "Application.kt" to the suggested one. and now it's compiling, I just haven't tested the notifications yet.

Application.kt

package br.gov.rj.riodasostras.riodasostrasapp

import android.os.Bundle

import io.flutter.app.FlutterActivity
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
//import com.google.firebase.messaging.FirebaseMessagingService

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

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

MainActivity.kt

package br.gov.rj.riodasostras.riodasostrasapp

import androidx.annotation.NonNull;
import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugins.GeneratedPluginRegistrant

class MainActivity: FlutterActivity() {
    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
        GeneratedPluginRegistrant.registerWith(flutterEngine);
    }
}

flutter doctor

 flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 1.20.1, on Microsoft Windows [versÃ£o 10.0.18362.657], locale pt-BR)

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
[√] Android Studio (version 3.6)
[√] IntelliJ IDEA Community Edition (version 2019.3)
[√] VS Code (version 1.45.1)
[√] Connected device (1 available)

• No issues found!
PS D:\MyDartProjects\riodasostrasapp> flutter doctor -v
[√] Flutter (Channel stable, 1.20.1, on Microsoft Windows [versÃ£o 10.0.18362.657], locale pt-BR)
    • Flutter version 1.20.1 at C:\src\flutter
    • Framework revision 2ae34518b8 (5 days ago), 2020-08-05 19:53:19 -0700
    • Engine revision c8e3b94853
    • Dart version 2.9.0

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
    • Android SDK at C:\Users\isaque\AppData\Local\Android\sdk
    • Platform android-R, build-tools 29.0.0
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)
    • All Android licenses accepted.

[√] Android Studio (version 3.6)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 44.0.2
    • Dart plugin version 192.7761
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b04)

[√] IntelliJ IDEA Community Edition (version 2019.3)
    • IntelliJ at C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2019.3.4
    • Flutter plugin version 45.0.2
    • Dart plugin version 193.6911.31

[√] VS Code (version 1.45.1)
    • VS Code at C:\Users\isaque\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.12.2

[√] Connected device (1 available)
    • SM J120H (mobile) • 4200b9bf90139200 • android-arm • Android 5.1.1 (API 22)

• No issues found!

Ideally, the Readme and documentation should be updated

yourshinsuke · 2020-08-24T07:53:03Z

android/app/src/main/kotlin/com/example/my_app/Aplication.kt

package com.example.my_app

import android.os.Bundle

import io.flutter.app.FlutterActivity
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
//import com.google.firebase.messaging.FirebaseMessagingService

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

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

yourshinsuke · 2020-08-24T07:56:39Z

@insinfo
Hello
You mean.
rename Application.kt to MainActivity.kt?
How is your android/app/src/main/AndroidManifest.xml?

Do you import? both of them?

        <activity
            android:name=".MainActivity"
// something

        <activity
            android:name=".Application"
        />

Salakar · 2020-11-05T09:45:46Z

Hey all 👋

As part of our roadmap (#2582) we've just shipped a complete rework of the firebase_messaging plugin that aims to solve this and many other issues. Additionally, messaging now supports v2 embedding.

If you can, please try out the dev release (see the migration guide for upgrading and for changes) and if you have any feedback then join in the discussion here.

Given the scope of the rework I'm going to go ahead and close this issue in favor of trying out the latest plugin.

Thanks everyone.

Jacobsjj2 added the type: bug Something isn't working label Dec 12, 2019

iapicca added the blocked: customer-response Waiting for customer response, e.g. more information was requested. label Dec 12, 2019

NateNjuguna mentioned this issue Dec 15, 2019

[firebase_messaging] Got some errors after adding onBackgroundMessage handler. #1641

Closed

daadu mentioned this issue Dec 21, 2019

[firebase_messaging] Application.kt: Type mismatch: inferred type is PluginRegistry but FlutterEngine was expected #1684

Closed

iapicca added impact: crowd Affects many people, though not necessarily a specific customer with an assigned label. (P2) and removed blocked: customer-response Waiting for customer response, e.g. more information was requested. labels Feb 12, 2020

giorgio79 mentioned this issue Apr 7, 2020

[firebase_messaging] Need Kotlin documentation and example #2311

Closed

Ehesp added the plugin: messaging label Apr 20, 2020

ghost mentioned this issue Apr 29, 2020

[firebase_messaging] While .configurate "PlatformException(error, PluginRegistrantCallback is not set., null)" #248

Closed

leobasilio mentioned this issue Jul 4, 2020

[firebase_messaging] Setup instructions #2895

Closed

Salakar closed this as completed Nov 5, 2020

firebase locked and limited conversation to collaborators Dec 6, 2020

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[firebase_messaging] Type mismatch: inferred type is PluginRegistry? but FlutterEngine was expected #1613

[firebase_messaging] Type mismatch: inferred type is PluginRegistry? but FlutterEngine was expected #1613

Jacobsjj2 commented Dec 12, 2019

hsangtini commented Dec 12, 2019

iapicca commented Dec 12, 2019

Jacobsjj2 commented Dec 12, 2019

hsangtini commented Dec 13, 2019

Jacobsjj2 commented Dec 18, 2019

jayvhaile commented Jan 20, 2020

isyantoID commented Jan 29, 2020

insinfo commented Aug 10, 2020 •

edited

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yourshinsuke commented Aug 24, 2020 •

edited

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yourshinsuke commented Aug 24, 2020

Salakar commented Nov 5, 2020

[firebase_messaging] Type mismatch: inferred type is PluginRegistry? but FlutterEngine was expected #1613

[firebase_messaging] Type mismatch: inferred type is PluginRegistry? but FlutterEngine was expected #1613

Comments

Jacobsjj2 commented Dec 12, 2019

hsangtini commented Dec 12, 2019

iapicca commented Dec 12, 2019

Jacobsjj2 commented Dec 12, 2019

hsangtini commented Dec 13, 2019

Jacobsjj2 commented Dec 18, 2019

jayvhaile commented Jan 20, 2020

isyantoID commented Jan 29, 2020

insinfo commented Aug 10, 2020 • edited Loading

Application.kt

MainActivity.kt

flutter doctor

yourshinsuke commented Aug 24, 2020 • edited Loading

yourshinsuke commented Aug 24, 2020

Salakar commented Nov 5, 2020

insinfo commented Aug 10, 2020 •

edited

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yourshinsuke commented Aug 24, 2020 •

edited

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