如何在flutter中静音应用程序

dependencies:
  audioplayers: ^0.20.1

import 'package:audioplayers/audioplayers.dart';

AudioPlayer audioPlayer = AudioPlayer();

audioPlayer.setVolume(0);

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Mute App',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MutePage(),
    );
  }
}

class MutePage extends StatefulWidget {
  @override
  _MutePageState createState() => _MutePageState();
}

class _MutePageState extends State<MutePage> {
  AudioPlayer audioPlayer = AudioPlayer();

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

  void muteApp() async {
    await audioPlayer.setVolume(0);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Mute App'),
      ),
      body: Center(
        child: Text(
          'App is muted',
          style: TextStyle(fontSize: 24),
        ),
      ),
    );
  }
}