如何在Flutter中实现多个本地通知？

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

FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
    FlutterLocalNotificationsPlugin();

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Local Notifications'),
        ),
        body: Center(
          child: RaisedButton(
            child: Text('Send Notification'),
            onPressed: () {
              _showNotification();
            },
          ),
        ),
      ),
    );
  }

  Future<void> _showNotification() async {
    var initializationSettingsAndroid =
        AndroidInitializationSettings('app_icon');
    var initializationSettingsIOS = IOSInitializationSettings();
    var initializationSettings = InitializationSettings(
        initializationSettingsAndroid, initializationSettingsIOS);
    await flutterLocalNotificationsPlugin.initialize(initializationSettings);

    var androidPlatformChannelSpecifics = AndroidNotificationDetails(
        'channel_id', 'channel_name', 'channel_description',
        importance: Importance.max, priority: Priority.high);
    var iOSPlatformChannelSpecifics = IOSNotificationDetails();
    var platformChannelSpecifics = NotificationDetails(
        androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);

    for (int i = 1; i <= 5; i++) {
      await flutterLocalNotificationsPlugin.show(
          i,
          'Notification $i',
          'This is a local notification.',
          platformChannelSpecifics,
          payload: 'notification_$i');
    }
  }
}