我目前有一些代码，该代码使用AudioRecord类从设备麦克风中读取录音，然后使用AudioTrack类将其回放。

我的问题是，当我播放时，它是通过扬声器播放的。

我希望它通过设备上的听筒播放。

这是我的代码：

public class LoopProg extends Activity {

boolean isRecording; //currently not used

AudioManager am;

int count = 0;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);

am.setMicrophoneMute(true);

while(count <= 1000000){

Record record = new Record();

record.run();

count ++;

Log.d("COUNT", "Count is : " + count);

}

}

public class Record extends Thread{

static final int bufferSize = 200000;

final short[] buffer = new short[bufferSize];

short[] readBuffer = new short[bufferSize];

public void run() {

isRecording = true;

android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);

int buffersize = AudioRecord.getMinBufferSize(11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);

AudioRecord arec = new AudioRecord(MediaRecorder.AudioSource.MIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize);

AudioTrack atrack = new AudioTrack(AudioManager.STREAM_MUSIC, 11025, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize, AudioTrack.MODE_STREAM);

am.setRouting(AudioManager.MODE_NORMAL,1, AudioManager.STREAM_MUSIC);

int ok = am.getRouting(AudioManager.ROUTE_EARPIECE);

Log.d("ROUTING", "getRouting = " + ok);

setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);

//am.setSpeakerphoneOn(true);

}

}

}

如您所见，如果我尝试使用AudioManager类及其方法(包括不赞成使用的setRouting方法)尝试的代码没有任何效果，则setSpeakerphoneOn方法似乎完全无效，路由方法也无效。

有没有人知道如何通过听筒而不是Spaker电话播放它？