with scheduled notifier

notification_api.dart

//import timezone plugin
import 'package:timezone/data/latest_all.dart' as timezone;
import 'package:timezone/timezone.dart' as timezone;

class NotificationApi {
  static final _notification = FlutterLocalNotificationsPlugin();

  static void init() {
    _notification.initialize(
      const InitializationSettings(
        android: AndroidInitializationSettings('@mipmap/ic_launcher'),
        iOS: DarwinInitializationSettings(),
      ),
    );
  }

  static scheduleNotification() async {
    timezone.initializeTimeZones();
    var androidPlatformChannelSpecifics = const AndroidNotificationDetails(
      'channel id',
      'channel name',
      channelDescription: 'channel description',
      importance: Importance.max, // set the importance of the notification
      priority: Priority.high, // set prority
    );
    var iOSPlatformChannelSpecifics = const DarwinNotificationDetails();
    var platformChannelSpecifics = NotificationDetails(
      android: androidPlatformChannelSpecifics,
      iOS: iOSPlatformChannelSpecifics,
    );
    await _notification.zonedSchedule(
        "id", 
        "notification title",
        'Message goes here',
        timezone.TZDateTime.now(timezone.local).add(const Duration(seconds: 10)),
        platformChannelSpecifics,
        uiLocalNotificationDateInterpretation:
            UILocalNotificationDateInterpretation.absoluteTime,
        androidAllowWhileIdle: true);
  }
}