颤抖的背景音乐错误

Question

嘿，我想要我的Flutter应用程序背景音乐，在那里我导入了这个包

-导入'package：audioplayers / audio_cache.dart';

-导入'package：audioplayers / audioplayers.dart';

我能够播放音乐，但是总是可以，如果我再次按下凸起的按钮，则音乐会重新开始播放，因此它可以多次播放，有人知道我可以解决这个问题，这是我代码中的重要部分。

class _MyHomepageState extends State<MyHomepage> {
  AudioPlayer player = AudioPlayer();
  AudioCache cache = new AudioCache();
  bool isPlaying = false;

  Future<bool> _willPopCallback() async {
    if (isPlaying == false) {
      setState(() {
        isPlaying = true;
      });
      player.stop();
    }
    return true;
  }

  openingActions() async {
    player = await cache.loop('audio/test.mp3');
  }

 
  @override
  Widget build(BuildContext context) {
    openingActions();
    return WillPopScope(
        onWillPop: () => _willPopCallback(),
        child: Scaffold(
          body: Container(
            decoration: BoxDecoration(
              image: DecorationImage(
                image: AssetImage('assets/images/background.jpg'),
                fit: BoxFit.cover,
              ),
            ),