如果我在暂停状态下启动MediaRecorder.start并在Android中以正常状态启动MediaRecorder.stop，会引起错误吗？

如何解决如果我在暂停状态下启动MediaRecorder.start并在Android中以正常状态启动MediaRecorder.stop，会引起错误吗？

录制音频是一项长时间的操作，因此我在服务中的协同程序中启动mRecorder?.start()，您可以看到RecordService.kt。

我用suspend fun startRecord(){...}调用AndroidViewModel中的viewModelScope.launch { }，开始录制音频。

我仅在fun stopRecord(){...}中调用普通的AndroidViewModel来停止录制音频，您可以看到HomeViewModel.kt，这会导致对象var mRecorder: MediaRecorder?出错吗？

HomeViewModel.kt

class HomeViewModel(val mApplication: Application,private val mDBVoiceRepository: DBVoiceRepository) : AndroidViewModel(mApplication) {

    private var mService: RecordService? = null

    private val serviceConnection = object : ServiceConnection {
        override fun onServiceConnected(className: ComponentName,iBinder: IBinder) {
            val binder = iBinder as RecordService.MyBinder
            mService = binder.service
        }
       ...
    }


    fun bindService() {
        Intent(mApplication,RecordService::class.java).also { intent ->
            mApplication.bindService(intent,serviceConnection,Context.BIND_AUTO_CREATE)
        }
    }  

    fun unbindService() {
        Intent(mApplication,RecordService::class.java).also { intent ->
            mApplication.unbindService(serviceConnection)
        }
    }

    fun startRecord(){
        viewModelScope.launch {
            mService?.startRecord()
        }
    }

    fun stopRecord(){
        mService?.stopRecord()
    }      
}

RecordService.kt

class RecordService : Service() {

    private var mRecorder: MediaRecorder? = null

    suspend fun startRecord(){

        mRecorder = MediaRecorder()

        withContext(Dispatchers.IO) {
            mRecorder?.setOutputFile(filename);

            mRecorder?.setMaxDuration(1000*60*20); //20 Mins
            mRecorder?.setAudioChannels(1);
            mRecorder?.setAudioSamplingRate(44100);
            mRecorder?.setAudioEncodingBitRate(192000);

            mRecorder?.prepare()
            mRecorder?.start()
        }
    }


    fun stopRecord(){
        mRecorder?.stop()
        mRecorder=null
    }

}

解决方法

否，它不会引起错误，但是如果在调用此方法时遇到运行时错误，则可能是由于记录器未接收到任何有效的声音或视频来记录的。请查看下面的文档链接以获取更多信息。

https://developer.android.com/reference/android/media/MediaRecorder#stop()