Merhabalar,
Firebase ile bildirim göndermeye çalıştığımda aşağıdaki şekilde konsola mesaj yazdırılıyor fakat üst çubuğa bildirim olarak düşmüyor. Bu konuda yardım edebilirseniz çok sevinirim.
I/flutter (30963): on message {notification: {title: dhenemeeeyy, body: heyyy}, data: {click_action: FLUTTER_NOTIFICATION_CLICK}}
MainActivity.kt
package com.example.wordpress_app
 
import android.os.Bundle
 
import io.flutter.app.FlutterActivity
import io.flutter.plugins.GeneratedPluginRegistrant
 
import android.os.Build
import android.view.ViewTreeObserver
import android.view.WindowManager
class MainActivity: FlutterActivity() {
 
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
 
GeneratedPluginRegistrant.registerWith(this)
 
 
}
}`

Application.kt
`package com.example.wordpress_app
 
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)
}
}`

push_nofitications.dart
`import 'dart:io';
 
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:fluttertoast/fluttertoast.dart';
 
class PushNotificationsManager {
PushNotificationsManager._();
 
factory PushNotificationsManager() => _instance;
 
static final PushNotificationsManager _instance =
PushNotificationsManager._();
 
final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
bool _initialized = false;
 
Future<void> init(dynamic myBackgroundMessageHandler, dynamic displayNotification) async {
final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
Future onSelectNotification(String payload) async {
if (payload != null) {
debugPrint('notification payload: ' + payload);
}
/*Navigator.push(
      context,
      new MaterialPageRoute(builder: (context) => new SecondScreen(payload)),
    );*/
}
 
Future onDidRecieveLocalNotification(
int id, String title, String body, String payload) async {
// display a dialog with the notification details, tap ok to go to another page
}
 
// TOP-LEVEL or STATIC function to handle background messages
 
_firebaseMessaging.configure(
onMessage: (Map<String, dynamic> message) {
print('on message ${message}');
// initialise the plugin. app_icon needs to be a added as a drawable resource to the Android head project
displayNotification(message);
// _showItemDialog(message);
},
onResume: (Map<String, dynamic> message) {
print('on resume $message');
},
onLaunch: (Map<String, dynamic> message) {
print('on launch $message');
},
onBackgroundMessage: Platform.isIOS ? null : myBackgroundMessageHandler,
);
_firebaseMessaging.requestNotificationPermissions(
const IosNotificationSettings(sound: true, badge: true, alert: true));
_firebaseMessaging.onIosSettingsRegistered
.listen((IosNotificationSettings settings) {
print("Settings registered: $settings");
});
_firebaseMessaging.getToken().then((String token) {
assert(token != null);
print(token);
});
}
}`

main.dart
`static Future<dynamic> myBackgroundMessageHandler(
Map<String, dynamic> message) {
if (message.containsKey('data')) {
// Handle data message
final dynamic data = message['data'];
print("background $data");
}
 
if (message.containsKey('notification')) {
// Handle notification message
final dynamic notification = message['notification'];
print("background $notification");
}
}
 
final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
new FlutterLocalNotificationsPlugin();
 
@override
void initState() {
var initializationSettingsAndroid =
new AndroidInitializationSettings('<span class="userTag">@mipmap/launcher_icon');</span>
 
var initializationSettingsIOS = new IOSInitializationSettings(
onDidReceiveLocalNotification: onDidRecieveLocalNotification);
 
var initializationSettings = new InitializationSettings(
initializationSettingsAndroid, initializationSettingsIOS);
 
flutterLocalNotificationsPlugin.initialize(initializationSettings,
onSelectNotification: onSelectNotification);
_firebaseMessaging.subscribeToTopic("tanticaret");
_firebaseMessaging.configure(
onMessage: (Map<String, dynamic> message) {
print('on message ${message}');
displayNotification(message);
},
onResume: (Map<String, dynamic> message) {
print('on resume $message');
},
onLaunch: (Map<String, dynamic> message) {
print('on launch $message');
},
onBackgroundMessage:
Platform.isAndroid ? myBackgroundMessageHandler : null);
_firebaseMessaging.requestNotificationPermissions(
const IosNotificationSettings(sound: true, badge: true, alert: true));
_firebaseMessaging.onIosSettingsRegistered
.listen((IosNotificationSettings settings) {
print("Settings registered: $settings");
});
_firebaseMessaging.getToken().then((String token) {
assert(token != null);
print(token);
});
super.initState();
}
 
Future displayNotification(Map<String, dynamic> message) async {
var androidPlatformChannelSpecifics = new AndroidNotificationDetails(
'channelid', 'flutterfcm', 'your channel description',
importance: Importance.Max, priority: Priority.High);
var iOSPlatformChannelSpecifics = new IOSNotificationDetails();
var platformChannelSpecifics = new NotificationDetails(
androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
await flutterLocalNotificationsPlugin.show(
0,
message['notification']['title'],
message['notification']['body'],
platformChannelSpecifics,
);
}
 
Future onSelectNotification(String payload) async {
if (payload != null) {
debugPrint('notification payload: ' + payload);
}
/*Navigator.push(
      context,
      new MaterialPageRoute(builder: (context) => new SecondScreen(payload)),
    );*/
}
 
Future onDidRecieveLocalNotification(
int id, String title, String body, String payload) async {
// display a dialog with the notification details, tap ok to go to another page
 
showDialog(
context: context,
builder: (BuildContext context) => new CupertinoAlertDialog(
title: new Text(title),
content: new Text(body),
actions: [
CupertinoDialogAction(
isDefaultAction: true,
child: new Text('Tamam'),
onPressed: () async {
Navigator.of(context, rootNavigator: true).pop();
},
),
],
),
);
  }