隔离播放停止音频声音颤动不起作用

Question

嗨，我想实现一个隔离来播放资产中的停止音频铃声 我已经创建了隔离，但不知道为什么它不起作用，有人知道我缺少什么，下面是我的示例代码

void audioIsolateEntry() async {
   final ReceivePort receivePort = ReceivePort();
     IsolateNameServer.registerPortWithName(receivePort.sendPort, 'audio_isolate');

 final audioPlayer = AudioPlayer();

receivePort.listen((message) async {
  if (message == 'play') {
     debugPrint('Playing audio...');
    await audioPlayer.setSource(AssetSource('ringtone.mp3'));
  await audioPlayer.resume();
  } else if (message == 'pause') {
   debugPrint('Pausing audio...');
  await audioPlayer.pause();
} else if (message == 'stop') {
  debugPrint('Stopping audio...');
  await audioPlayer.stop();
  }
 });
 }

void main() async {
    WidgetsFlutterBinding.ensureInitialized();
   runApp(const MyApp());
  }

   void playAudio() {
     final isolate = IsolateNameServer.lookupPortByName('audio_isolate');
     debugPrint('play isolate $isolate');
  if (isolate != null) {
   debugPrint('playing $isolate');

    isolate.send('play');
   } else {
   debugPrint('Isolate not found!');
  }
  }

 void pauseAudio() async {
  final isolate = await IsolateNameServer.lookupPortByName('audio_isolate');
   if (isolate != null) {
    isolate.send('pause');
 } else {
   debugPrint('Isolate not found!');
}
}

void stopAudio() async {
  final isolate = await IsolateNameServer.lookupPortByName('audio_isolate');
if (isolate != null) {
isolate.send('stop');
 } else {
debugPrint('Isolate not found!');
 }

}

  class MyApp extends StatefulWidget {
    const MyApp({super.key});

 @override
 State<MyApp> createState() => _MyAppState();
  }

  class _MyAppState extends State<MyApp> {
     AudioPlayer? audioPlayer;
    @override
    void initState() {
      super.initState();

      register();
   }



 @override
 Widget build(BuildContext context) {
    return MaterialApp(
     home: Scaffold(
    appBar: AppBar(
      title: const Text('Audio Player'),
    ),
    body: Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children:[
          ElevatedButton(
            onPressed: () async {
              playAudio();
            },
            child: const Text('Play'),
          ),
          ElevatedButton(
            onPressed: () {
              stopAudio();
            },
            child: const Text('Stop'),
          ),
        ],
      ),
    ),
  ),
);
 }

void register() {
  audioIsolateEntry();
}
  }

Answer 1

隔离看起来不错。问题可能出在声音上。 您应该首先播放音频而不是继续播放。

尝试一下：

if (message == 'play') {
        debugPrint('Playing audio...');
        if (audioPlayer.state == PlayerState.paused ||
            audioPlayer.state == PlayerState.stopped) {
          await audioPlayer.resume();
        } else {
          await audioPlayer.play(AssetSource('ringtone.mp3'));
        }
      }

注意：

1. 确保您的资源在

   pubspec.yaml

   文件中正确设置
2. 在我的测试过程中，热重启使其停止工作。这可能是我的环境混乱，但值得检查停止调试并重试。
3. 我在真实的 Android 设备上运行了它。不确定它是否可以在模拟器上运行。

Answer 2

好的，所以我创建了一个工作正常的方法

String portName = 'audio_isolate';

fcmBackgroundHandler() async {
 ReceivePort receiver = ReceivePort();
 IsolateNameServer.registerPortWithName(receiver.sendPort, portName);

 receiver.listen((message) async {
   debugPrint('oyeah play $message');
  if (message == "play") {
    await FlutterRingtonePlayer().play(
      looping: true,
      fromAsset: 'assets/ringtone.mp3',
    );
  }
  if (message == "stop") {
     await FlutterRingtonePlayer().stop();
  }
 });
 }

只需播放即可停止使用

 IsolateNameServer.lookupPortByName(portName)?.send("play");

和

 IsolateNameServer.lookupPortByName(portName)?.send("stop");

但我认为错误的是 当我在收到通知时使用它 inisde FCM 后台处理程序来播放铃声时，是否需要更多时间来播放 所以在backgroundhandler中使用要小心