本文实例讲述了Android实现直接播放麦克风采集到的声音。分享给大家供大家参考。具体如下：

这是一个直接播放麦克风采集到的声音线程类：

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, channelConfiguration, audioEncoding)*2; 
  AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, frequency, channelConfiguration, audioEncoding, recBufSize); 
  AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, frequency, channelConfiguration, audioEncoding, plyBufSize, AudioTrack.MODE_STREAM); 
  byte[] recBuf = new byte[recBufSize]; 
  audioRecord.startRecording(); 
  audioTrack.play(); 
  while(true){ 
    int readLen = audioRecord.read(recBuf, 0, recBufSize); 
    audioTrack.write(recBuf, 0, readLen); 
  } 
  audioTrack.stop(); 
  audioRecord.stop(); 
  } 
} 

使用的时候，这样就行：
复制代码 代码如下:RecordThread rec = new RecordThread(); 
rec.start();

需要在AndroidManifest.xml文件中添加路由权限：
复制代码 代码如下:<uses-permission android:name="android.permission.RECORD_AUDIO"/>

希望本文所述对大家的Android程序设计有所帮助。