Flutter -如何在后台格式化通知的标题和正文？

dependencies:
  flutter_local_notifications: ^5.0.0

import 'package:flutter_local_notifications/flutter_local_notifications.dart';

FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
    FlutterLocalNotificationsPlugin();

const AndroidInitializationSettings initializationSettingsAndroid =
    AndroidInitializationSettings('app_icon');

final InitializationSettings initializationSettings =
    InitializationSettings(android: initializationSettingsAndroid);

await flutterLocalNotificationsPlugin.initialize(initializationSettings);

const AndroidNotificationDetails androidPlatformChannelSpecifics =
    AndroidNotificationDetails(
  'your_channel_id',
  'your_channel_name',
  'your_channel_description',
  importance: Importance.max,
  priority: Priority.high,
);

const NotificationDetails platformChannelSpecifics =
    NotificationDetails(android: androidPlatformChannelSpecifics);

await flutterLocalNotificationsPlugin.show(
  0,
  '通知标题',
  '通知正文',
  platformChannelSpecifics,
);