Why FCM not working on android device in flutter application? - flutter

Question

I currently create a chat application and I try to implement the notification system when an user receive a new incoming message.
It's work perfectly on iOS devices, but not work on android device.
Thanks for your help,
I tried to request a notification permission to a user. But on android device I didn't have any pop up spawn on the screen. I added firebasemessaging.onmessage.listen to try to fix the bug, but it did not work.
import 'package:firebase_messaging/firebase_messaging.dart';
class PermissionService {
Future<void> notification() async {
await FirebaseMessaging.instance.requestPermission(
alert: true,
announcement: false,
badge: true,
carPlay: false,
criticalAlert: false,
provisional: false,
sound: true,
);
FirebaseMessaging.onMessage.listen((event) {
print("A new message event was published");
});
FirebaseMessaging.onMessageOpenedApp.listen((event) {
print("A new OpenedAppMessage event was published");
});
}
}
That is my get fcm token function. The goal of the method is get a fcm token of the device. This function work perfectly, because I can see the fcm token of the android device inside my database.
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
class FCMService {
final FirebaseAuth _firebaseAuth = FirebaseAuth.instance;
Future<void> createFcmToken() async {
final User? user = _firebaseAuth.currentUser;
final fcmToken = await FirebaseMessaging.instance.getToken();
if (user != null) {
await FirebaseFirestore.instance
.collection("fcm_token")
.doc(user.uid)
.set({
"fcm_token": fcmToken,
"user_id": user.uid,
});
}
}
}
On this image, I can see the cloud function start, and send the notification with fcm token
firebase cloud function

Answer 1

when app running on foreground, FCM android didnt popup notification. it already mentioned on the documentation https://firebase.flutter.dev/docs/messaging/notifications#android-configuration
thats why, we need another additional plugin to handle foreground notification on Android. there are many option plugin in pub.dev , but they recommend to use
flutter_local_notifications package
FirebaseMessaging.onMessage.listen((RemoteMessage message) {
RemoteNotification notification = message.notification;
AndroidNotification android = message.notification?.android;
// If `onMessage` is triggered with a notification, construct our own
// local notification to show to users using the created channel.
if (notification != null && android != null) {
flutterLocalNotificationsPlugin.show(
notification.hashCode,
notification.title,
notification.body,
NotificationDetails(
android: AndroidNotificationDetails(
channel.id,
channel.name,
channel.description,
icon: android?.smallIcon,
// other properties...
),
));
}
});
please read the documentation for detail setup