PluginRegistry cannot be converted to FlutterEngine - firebase

Question

As soon as I updated the flutter to version 1.12.13 I found this issue and can't fix it. I did as the firebase_messaging tutorial sent and got the following error:
"error: incompatible types: PluginRegistry cannot be converted to FlutterEngine
GeneratedPluginRegistrant.registerWith (registry); "
My code is as follows:
package io.flutter.plugins;
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 android.app.NotificationChannel;
import android.app.NotificationManager;
import android.os.Build;
public class Application extends FlutterApplication implements PluginRegistrantCallback {
#Override
public void onCreate() {
super.onCreate();
FlutterFirebaseMessagingService.setPluginRegistrant(this);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
NotificationChannel channel = new NotificationChannel("messages","Messages", NotificationManager.IMPORTANCE_LOW);
NotificationManager manager = getSystemService(NotificationManager.class);
manager.createNotificationChannel(channel);
}
}
#Override
public void registerWith(PluginRegistry registry) {
GeneratedPluginRegistrant.registerWith(registry);
}
}

Answer 1

Replace this code line:
GeneratedPluginRegistrant.registerWith(registry);
with this:
FirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
Make sure to import:
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin;

Answer 2

Updated on December 31, 2019.
You should not use the Firebase cloud messaging tool to send notifications, as it forces you to use the title and body.
You must send a notification without the title and body. have the application in the background, that should work for you.
If it works for you, I would appreciate it if you could give me a vote on this answer, thank you.
I have found a temporary solution. I am not sure this is the best fix but my plugins work as expected and I assume the problem has to be with the registry provided by io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService on line 164.
My AndroidManifest.xml file:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="Your Package"> // CHANGE THIS
<application
android:name=".Application"
android:label="" // YOUR NAME APP
android:icon="#mipmap/ic_launcher">
<activity
android:name=".MainActivity"
android:launchMode="singleTop"
android:theme="#style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
<!-- BEGIN: Firebase Cloud Messaging -->
<intent-filter>
<action android:name="FLUTTER_NOTIFICATION_CLICK" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<!-- END: Firebase Cloud Messaging -->
</activity>
<meta-data
android:name="flutterEmbedding"
android:value="2" />
</application>
</manifest>
My Application.java
package YOUR PACKAGE HERE;
import io.flutter.app.FlutterApplication;
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService;
public class Application extends FlutterApplication implements PluginRegistrantCallback {
#Override
public void onCreate() {
super.onCreate();
FlutterFirebaseMessagingService.setPluginRegistrant(this);
}
#Override
public void registerWith(PluginRegistry registry) {
FirebaseCloudMessagingPluginRegistrant.registerWith(registry);
}
}
My FirebaseCloudMessagingPluginRegistrant.java
package YOUR PACKAGE HERE;
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin;
public final class FirebaseCloudMessagingPluginRegistrant{
public static void registerWith(PluginRegistry registry) {
if (alreadyRegisteredWith(registry)) {
return;
}
FirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
}
private static boolean alreadyRegisteredWith(PluginRegistry registry) {
final String key = FirebaseCloudMessagingPluginRegistrant.class.getCanonicalName();
if (registry.hasPlugin(key)) {
return true;
}
registry.registrarFor(key);
return false;
}
}
Send Notification in dart:
Future<void> sendNotificationOnBackground({
#required String token,
}) async {
await firebaseMessaging.requestNotificationPermissions(
const IosNotificationSettings(sound: true, badge: true, alert: true, provisional: false),
);
await Future.delayed(Duration(seconds: 5), () async {
await http.post(
'https://fcm.googleapis.com/fcm/send',
headers: <String, String>{
'Content-Type': 'application/json',
'Authorization': 'key=$SERVERTOKEN', // Constant string
},
body: jsonEncode(
<String, dynamic>{
'notification': <String, dynamic>{
},
'priority': 'high',
'data': <String, dynamic>{
'click_action': 'FLUTTER_NOTIFICATION_CLICK',
'id': '1',
'status': 'done',
'title': 'title from data',
'message': 'message from data'
},
'to': token
},
),
);
});
}
I added a wait with a duration of 5 seconds so you can put the application in the background and verify that the message in the background is running

Answer 3

A port of DomingoMG's code to Kotlin can be found below (file paths included).
Tested and working on 10.2020.
/pubspec.yaml
firebase_messaging: ^7.0.0
/android/app/src/main/kotlin/Application.kt
package YOUR_PACKAGE_HERE
import io.flutter.app.FlutterApplication
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService
public class Application: FlutterApplication(), PluginRegistrantCallback {
override fun onCreate() {
super.onCreate()
FlutterFirebaseMessagingService.setPluginRegistrant(this)
}
override fun registerWith(registry: PluginRegistry) {
FirebaseCloudMessagingPluginRegistrant.registerWith(registry)
}
}
/android/app/src/main/kotlin/FirebaseCloudMessagingPluginRegistrant.kt
package YOUR_PACKAGE_HERE
import io.flutter.plugin.common.PluginRegistry
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin
class FirebaseCloudMessagingPluginRegistrant {
companion object {
fun registerWith(registry: PluginRegistry) {
if (alreadyRegisteredWith(registry)) {
return;
}
FirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"))
}
fun alreadyRegisteredWith(registry: PluginRegistry): Boolean {
val key = FirebaseCloudMessagingPluginRegistrant::class.java.name
if (registry.hasPlugin(key)) {
return true
}
registry.registrarFor(key)
return false
}
}
}

Answer 4

Some research and I found this to be working.
Seached up the official Flutterfire repository, and checked out the latest plugins on it.
GeneratedPluginRegistrant.registerWith(registry); was not working, which is mentioned on the official docs as well. FlutterFire firebase_messaging.
Using the plugin io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin, which I discovered from Flutterfire GitHub repo
Currently on firabase_messaging: 9.0.0
//
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.flutter.plugins.GeneratedPluginRegistrant;
import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingBackgroundService;
// Be sure to import the exact Plugin
import io.flutter.plugins.firebase.messaging.FlutterFirebaseMessagingPlugin;
public class Application extends FlutterApplication implements PluginRegistrantCallback {
//
#Override
public void onCreate() {
super.onCreate();
FlutterFirebaseMessagingBackgroundService.setPluginRegistrant(this);
}
#Override
public void registerWith(PluginRegistry registry) {
FlutterFirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
}
}

Answer 5

Just Do
GeneratedPluginRegistrant.registerWith((FlutterEngine) registry);
inplace of
GeneratedPluginRegistrant.registerWith(registry);

Answer 6

In addition to DomingoMG's answer, don't forget to remove
#Override
public void configureFlutterEngine(#NonNull FlutterEngine flutterEngine) {
GeneratedPluginRegistrant.registerWith(flutterEngine);
from the mainactivity file under the android folder. If not, you will get an error.

Answer 7

I added only water class as extra from the steps in Firebase Messaging package and it was solved :
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin;
public final class FirebaseCloudMessagingPluginRegistrant{
public static void registerWith(PluginRegistry registry) {
if (alreadyRegisteredWith(registry)) {
return;
}
FirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
}
private static boolean alreadyRegisteredWith(PluginRegistry registry) {
final String key = FirebaseCloudMessagingPluginRegistrant.class.getCanonicalName();
if (registry.hasPlugin(key)) {
return true;
}
registry.registrarFor(key);
return false;
}}

Answer 8

I found this to work:
#Override
public void configureFlutterEngine(#NonNull FlutterEngine flutterEngine) {
super.configureFlutterEngine(flutterEngine);
// continue with custom method channel registration.
...
}
Not sure if you also need to use cleanUpFlutterEngine to clean method channel registration.

Answer 9

Change your MainActivity.java file to:
package co.appbrewery.micard;
import io.flutter.embedding.android.FlutterActivity;
public class MainActivity extends FlutterActivity {
}