Android实现直接播放麦克风采集到的声音

class RecordThread extends Thread{ 
  static final int frequency = 44100; 
  static final int chAnnelConfiguration = AudioFormat.CHAnnEL_CONfigURATION_MONO; 
  static final int audioEncoding = AudioFormat.ENCODING_PCM_16BIT; 
@Override 
public void run() { 
  // TODO Auto-generated method stub 
  int recBufSize = AudioRecord.getMinBufferSize(frequency,chAnnelConfiguration,audioEncoding)*2; 
  int plyBufSize = AudioTrack.getMinBufferSize(frequency,audioEncoding)*2; 
  AudioRecord audioRecord = new AudioRecord(MediaRecorder.Audiosource.MIC,frequency,audioEncoding,recBufSizE); 
  AudioTrack audioTrack = new AudioTrack(Au@L_11_3@manager.STREAM_MUSIC,plyBufSize,AudioTrack.MODE_STREAM); 
  byte[] recBuf = new byte[recBufSize]; 
  audioRecord.startRecording(); 
  audioTrack.play(); 
  while(true){ 
    int readLen = audioRecord.read(recBuf,recBufSizE); 
    audioTrack.write(recBuf,readLen); 
  } 
  audioTrack.stop(); 
  audioRecord.stop(); 
  } 
}