int sampleRate = 44100;
    int channelConfig = AudioFormat.CHANNEL_OUT_MONO;
    int audioFormat = AudioFormat.ENCODING_PCM_16BIT;		
		
    int buffersize = AudioTrack.getMinBufferSize(sampleRate, channelConfig, audioFormat);
    private final AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate, channelConfig,
            audioFormat, buffersize, AudioTrack.MODE_STREAM);

    public synchronized void playTrack(byte[] buffer) {
        if (audioTrack != null && audioTrack.getPlayState() == AudioTrack.PLAYSTATE_PLAYING) {
            audioTrack.write(buffer, 0, buffer.length);
        }
    }	
		
		

MP3 流

		
    int buffersize = AudioTrack.getMinBufferSize(16000, AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_MP3);
    private final AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 16000, AudioFormat.CHANNEL_OUT_MONO,
            AudioFormat.ENCODING_MP3, buffersize, AudioTrack.MODE_STREAM);

    public synchronized void playTrack(byte[] buffer) {
        if (audioTrack != null && audioTrack.getPlayState() == AudioTrack.PLAYSTATE_PLAYING) {
            audioTrack.write(buffer, 0, buffer.length);
        }
    }