Flutter: Android:如何创建不可移动的本地通知工具栏，上面有一些操作按钮，如截图所示

dependencies:
  flutter_local_notifications: ^5.3.0

import 'package:flutter_local_notifications/flutter_local_notifications.dart';

FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
    FlutterLocalNotificationsPlugin();

@override
void initState() {
  super.initState();

  var initializationSettingsAndroid =
      AndroidInitializationSettings('app_icon');
  var initializationSettings =
      InitializationSettings(android: initializationSettingsAndroid);

  flutterLocalNotificationsPlugin.initialize(initializationSettings);
}

Future<void> showNotificationToolbar() async {
  var androidPlatformChannelSpecifics = AndroidNotificationDetails(
    'channel_id',
    'channel_name',
    'channel_description',
    importance: Importance.defaultImportance,
    priority: Priority.defaultPriority,
    showProgress: false,
    ongoing: true,
    styleInformation: DefaultStyleInformation(true, true),
    channelAction: AndroidNotificationChannelAction.createIfNotExists,
    importance: Importance.max,
  );

  var platformChannelSpecifics =
      NotificationDetails(android: androidPlatformChannelSpecifics);

  await flutterLocalNotificationsPlugin.show(
    0,
    '通知标题',
    '通知内容',
    platformChannelSpecifics,
    payload: 'notification_payload',
  );
}

FlatButton(
  onPressed: () {
    showNotificationToolbar();
  },
  child: Text('展示通知工具栏'),
),