How to navigate from the local local notification from the background? - flutter

Question

I am using flutter local notification in my application. I could not able to navigate to a specific page by clicking the local notification when the application is in background.
It gives me the error:
_AssertionError ('package:flutter_local_notifications/src/platform_flutter_local_notifications.dart': Failed assertion: line 1018 pos 12: 'callback != null': The backgroundHandler needs to be either a static function or a top
level function to be accessible as a Flutter entry point.)
This is my code:
FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
FlutterLocalNotificationsPlugin();
Future<void> listiningToNotification() async {
FirebaseMessaging.onMessageOpenedApp
.listen((message) => notificationOnClick(message));
}
Future<void> localNotification(RemoteMessage message) async {
AndroidNotificationChannel channel = AndroidNotificationChannel(
"local_notification",
message.data["booking_id"],
description: message.data["task_id"],
importance: Importance.max,
playSound: true,
);
await flutterLocalNotificationsPlugin
.resolvePlatformSpecificImplementation<
AndroidFlutterLocalNotificationsPlugin>()
?.createNotificationChannel(channel);
await FirebaseMessaging.instance.setForegroundNotificationPresentationOptions(
alert: true,
badge: true,
sound: true,
);
const AndroidInitializationSettings initializationSettingsAndroid =
AndroidInitializationSettings("#drawable/notification_icon");
const InitializationSettings initializationSettings =
InitializationSettings(android: initializationSettingsAndroid);
flutterLocalNotificationsPlugin.initialize(
initializationSettings,
onDidReceiveNotificationResponse: (details) => notificationOnClick(message),
onDidReceiveBackgroundNotificationResponse: (details) =>
firebaseMessagingBackgroundHandler,
);
RemoteNotification? notification = message.notification;
AndroidNotification? android = message.notification?.android;
if (notification != null && android != null) {
flutterLocalNotificationsPlugin.show(
notification.hashCode,
notification.title,
notification.body,
NotificationDetails(
android: AndroidNotificationDetails(channel.id, channel.name,
channelDescription: channel.description,
importance: channel.importance,
playSound: channel.playSound,
color: Colors.white),
),
payload: notification.body);
}
}
#pragma('vm:entry-point')
Future<void> localNotificationBackground(
{required NotificationResponse details}) async {
print(details.payload);
}
What I am doing wrong or what I am missing ?
I also have this function for the firebase background notification. Is this the reason ?
#pragma('vm:entry-point')
Future<void> firebaseMessagingBackgroundHandler(RemoteMessage message) async {
List<FirebaseApp> app = Firebase.apps;
if (app.length < 2) {
await Firebase.initializeApp(
name: "xxxxxxxxxx", options: DefaultFirebaseOptions.currentPlatform);
}
FirebaseMessaging messaging = FirebaseMessaging.instance;
await messaging.requestPermission(
alert: true,
announcement: false,
badge: true,
carPlay: true,
criticalAlert: false,
provisional: true,
sound: true,
);
}