Android实现直接播放麦克风采集到的声音

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。