我开发了提醒应用程序，所以如何在flutter中发送本地通知给用户，而不使用firebase

dependencies:
  flutter_local_notifications: ^8.2.0

import 'package:flutter_local_notifications/flutter_local_notifications.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  
  // 初始化flutter_local_notifications插件
  const AndroidInitializationSettings initializationSettingsAndroid =
      AndroidInitializationSettings('app_icon');
  final InitializationSettings initializationSettings =
      InitializationSettings(android: initializationSettingsAndroid);
  await FlutterLocalNotificationsPlugin().initialize(initializationSettings);
  
  runApp(MyApp());
}

Future<void> showNotification() async {
  const AndroidNotificationDetails androidPlatformChannelSpecifics =
      AndroidNotificationDetails(
    'channel_id',
    'channel_name',
    'channel_description',
    importance: Importance.max,
    priority: Priority.high,
  );
  const NotificationDetails platformChannelSpecifics =
      NotificationDetails(android: androidPlatformChannelSpecifics);
  
  await FlutterLocalNotificationsPlugin().show(
    0,
    'Notification Title',
    'Notification Body',
    platformChannelSpecifics,
  );
}