Flutter Notification

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2
  # Use with the Workmanager class for background jobs headless execution.
  workmanager: ^0.5.1
  # Use with FlutterLocalNotificationsPlugin class for local push notifications.
  flutter_local_notifications: ^13.0.0

<!-- tambahkan permission dibawah ini ke dalam tag 'manifest' -->
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<!-- tambahkan permission dibawah ini ke dalam tag 'application' -->
<receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
<action android:name="android.intent.action.MY_PACKAGE_REPLACED"/>
</intent-filter>
</receiver>

import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:workmanager/workmanager.dart';

void main() {
  //Diperlukan jika Anda bermaksud untuk menginisialisasi di dalam fungsi main.
  WidgetsFlutterBinding.ensureInitialized();
  Workmanager().initialize(

      // fungsi untuk memanggil callbackDispatcher
      callbackDispatcher,

      //Jika diaktifkan, pemberitahuan akan diposting setiap kali tugas berjalan.
      //Hal ini berguna untuk proses debugging.
      isInDebugMode: true);

  Workmanager().registerPeriodicTask(
    "2",

    //Ini adalah nilai yang akan dikembalikan
    //dalam callbackDispatcher.
    "simplePeriodicTask",

    //Jika tidak ada frekuensi yang diberikan,
    //maka frekuensi default yang akan diatur adalah 15 menit.
    //Frekuensi minimum yang dapat diatur adalah 15 menit.
    //Jika Anda mengatur frekuensi yang lebih rendah,
    //Android akan secara otomatis mengubah frekuensi menjadi 15 menit.
    frequency: const Duration(minutes: 15),
  );
  runApp(const MyApp());
}

void callbackDispatcher() {
  Workmanager().executeTask((task, inputData) {
    // Menginisiasi plugin flutterlocalnotifications.
    FlutterLocalNotificationsPlugin flip = FlutterLocalNotificationsPlugin();

    //app_icon perlu ditambahkan sebagai
    //sumber daya gambar (drawable resource)
    //pada proyek dasar Android.
    var android = const AndroidInitializationSettings('@mipmap/ic_launcher');
    var iOS = const DarwinInitializationSettings();

    // Menginisialisasi setting untuk android dan ios
    var settings = InitializationSettings(android: android, iOS: iOS);
    flip.initialize(settings);
    _showNotificationWithDefaultSound(flip);
    return Future.value(true);
  });
}

Future _showNotificationWithDefaultSound(flip) async {
//Tampilkan notifikasi setiap 15 menit sekali
//dengan kemunculan pertama terjadi
//satu menit setelah metode dipanggil.
  var androidPlatformChannelSpecifics = const AndroidNotificationDetails(
    'your channel id',
    'your channel name',
    channelDescription: 'your channel description',
    importance: Importance.max,
    priority: Priority.high,
  );
  var iOSPlatformChannelSpecifics = const DarwinNotificationDetails(
      subtitle: 'your channel subtitle',
      interruptionLevel: InterruptionLevel.critical);

//menginisiasi channel platform untuk android dan ios
  var platformChannelSpecifics = NotificationDetails(
      android: androidPlatformChannelSpecifics,
      iOS: iOSPlatformChannelSpecifics);
  await flip.show(
      0,
      'Nextgen',
      'Your are one step away to connect with Nextgen',
      platformChannelSpecifics,
      payload: 'Default_Sound');
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Nextgen',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const HomePage(title: "Nextgen"),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State createState() => _HomePageState();
}

class _HomePageState extends State {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Container(),
    );
  }
}