Firebase (FCM) registration token in Flutter

Question

I am trying to send notification from Java Rest Api (using Firebase Admin sdk) to my Flutter application and it seems it requ

Answer 1

As you can the use the firebase Messaging Plugin to send the Notification. Through this code you can print the Token in Console.

final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
_firebaseMessaging.configure(
    onLaunch: (Map<String, dynamic> message) {
      print('onLaunch called');
    },
    onResume: (Map<String, dynamic> message) {
      print('onResume called');
    },
    onMessage: (Map<String, dynamic> message) {
      print('onMessage called');
    },
  );
  _firebaseMessaging.subscribeToTopic('all');
  _firebaseMessaging.requestNotificationPermissions(IosNotificationSettings(
    sound: true,
    badge: true,
    alert: true,
  ));
  _firebaseMessaging.onIosSettingsRegistered
      .listen((IosNotificationSettings settings) {
    print('Hello');
  });
  _firebaseMessaging.getToken().then((token) {
    print(token); // Print the Token in Console
  });
}

Answer 2

We need to add this package in pubspec.yaml file

firebase_messaging: ^4.0.0+1

Perform packages get

Now import this in your code

import 'package:firebase_messaging/firebase_messaging.dart';

Create instance of FirebaseMessaging

  FirebaseMessaging _firebaseMessaging = FirebaseMessaging();

Now we just to add the function which I have created in the answer in the link below

https://stackoverflow.com/a/60523014/11887774

Answer 3

Add this to your package's pubspec.yaml file:

dependencies:
  firebase_messaging: ^6.0.16

You can install packages from the command line:

with Flutter:

$ flutter packages get

Now in your Dart code, you can use:

import 'package:firebase_messaging/firebase_messaging.dart';

Implementation:

FirebaseMessaging _firebaseMessaging = FirebaseMessaging();



@override
void initState() {
  super.initState();
  firebaseCloudMessaging_Listeners();
}

void firebaseCloudMessaging_Listeners() {
  if (Platform.isIOS) iOS_Permission();

  _firebaseMessaging.getToken().then((token){
    print(token);
  });

  _firebaseMessaging.configure(
    onMessage: (Map<String, dynamic> message) async {
      print('on message $message');
    },
    onResume: (Map<String, dynamic> message) async {
      print('on resume $message');
    },
    onLaunch: (Map<String, dynamic> message) async {
      print('on launch $message');
    },
  );
}

void iOS_Permission() {
  _firebaseMessaging.requestNotificationPermissions(
      IosNotificationSettings(sound: true, badge: true, alert: true)
  );
  _firebaseMessaging.onIosSettingsRegistered
      .listen((IosNotificationSettings settings)
  {
    print("Settings registered: $settings");
  });
}

For more details step by information please refer this link

Hope this helps you

Answer 4

I am not clear your question though. For FCM you have to extend FirebaseMessagingService.

Example:

class PNPFirebaseMessagingService : FirebaseMessagingService() {
  override fun onNewToken(token: String?) {
     // you can collect token from here
  }
}