在前台服务中使用 audiowaveform 时出错

Question

我想在后台录制音频，但当我的前台服务启动时，我的录音机控制器不断收到错误，我正在使用 audio_waveforms 作为我的录音机，这是包 https://pub.dev/packages/audio_waveforms 对于我正在使用的后台服务：https://pub.dev/packages/flutter_foreground_task/versions/4.0.1

this is the error i keep getting:
E/flutter (30659): #1      MethodChannel._invokeMethod
platform_channel.dart:315
E/flutter (30659): <asynchronous suspension>
E/flutter (30659): #2      AudioWaveformsInterface.checkPermission
audio_waveforms_interface.dart:89
E/flutter (30659): <asynchronous suspension>
E/flutter (30659): #3      RecorderController.checkPermission
recorder_controller.dart:249
E/flutter (30659): <asynchronous suspension>
E/flutter (30659): #4      RecorderController.record

这是我的代码

 `  class MyTaskHandler extends TaskHandler {
  SendPort? _sendPort;
    int _eventCount = 0;

 @override
   Future<void> onStart(DateTime timestamp, SendPort? sendPort) async {
_sendPort = sendPort;
mic();
// You can use the getData function to get the stored data.
final customData =
    await FlutterForegroundTask.getData<String>(key: 'customData');
print('customData: $customData');
   }

 void mic() {
RecorderController recorderController = RecorderController();
recorderController.record(path: path2);
 }

  @override
  Future<void> onEvent(DateTime timestamp, SendPort? sendPort) async {
      FlutterForegroundTask.updateService(
      notificationTitle: 'SpakBit',
  notificationText: 'Recording',
  // callback: () {
  //   bplay().getDir();
  //   bplay().startOrStopRecording();
  // });
);
// Send data to the main isolate.
sendPort?.send(_eventCount);

_eventCount++;
   }

  @override
  Future<void> onDestroy(DateTime timestamp, SendPort? sendPort) async {
// You can use the clearAllData function to clear all the stored data.
await FlutterForegroundTask.clearAllData();
  }

  @override
  void onButtonPressed(String id) {
// Called when the notification button on the Android platform is pressed.
print('onButtonPressed >> $id');
 }

 @override
  void onNotificationPressed() {
// Called when the notification itself on the Android platform is pressed.
// bplay(recorderController).getDir();

// "android.permission.SYSTEM_ALERT_WINDOW" permission must be granted for
// this function to be called.

// Note that the app will only route to "/resume-route" when it is exited so
// it will usually be necessary to send a message through the send port to
// signal it to restore state when the app is already started.
FlutterForegroundTask.launchApp("/");
_sendPort?.send('onNotificationPressed');
 }
}

`