canvasing/lib/main.dart

import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:hris_selfservice_mobile/Screens/Splash/splash_screen.dart';
//import 'package:hris_selfservice_mobile/Screens/ForgotPassword/forgotPassword_screen.dart';
import 'constants.dart';
import 'firebase_options.dart';
import 'dart:developer' as logDev;

const AndroidNotificationChannel channel = AndroidNotificationChannel(
    'high_importance_channel', // id
    'High Importance Notifications', // title
    description:
    'This channel is used for important notifications.', // description
    importance: Importance.high,
    playSound: true);

final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();

Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  // If you're going to use other Firebase services in the background, such as Firestore,
  // make sure you call `initializeApp` before using other Firebase services.
  await Firebase.initializeApp();

  Map<String, dynamic> data = message.data;
  logDev.log(data.toString(), name: "NOTIF Messaging");

  String body = data['body'].toString();
  logDev.log(body, name: "NOTIF Body");

  print("Handling a background message: ${message.messageId}");
}

void main() async{
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );

  FirebaseMessaging messaging = FirebaseMessaging.instance;
  FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);


  NotificationSettings settings = await messaging.requestPermission(
    alert: true,
    announcement: false,
    badge: true,
    carPlay: false,
    criticalAlert: false,
    provisional: false,
    sound: true,
  );

  print('User granted permission: ${settings.authorizationStatus}');

  FirebaseMessaging.onMessage.listen((RemoteMessage message) async {
    Map<String, dynamic> data = message.data;
    logDev.log(data.toString(), name: "NOTIF Messaging");

    String body = data['body'].toString();
    logDev.log(body, name: "NOTIF Body");

    print('Got a message whilst in the foreground!');
    print('Message data: ${message.data}');

    if (message.notification != null) {
      print('Message also contained a notification: ${message.notification}');
    }
  });


  SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
    statusBarColor: Colors.transparent,
  ));

  FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);

  await flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<AndroidFlutterLocalNotificationsPlugin>()?.createNotificationChannel(channel);

  await FirebaseMessaging.instance.setForegroundNotificationPresentationOptions(
    alert: true,
    badge: true,
    sound: true,
  );

  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Welcome Screen',
      theme: ThemeData(
          primaryColor: kPrimaryColor,
          scaffoldBackgroundColor: Colors.white
      ),
      home: Splash(),
    );
  }
}