import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import android.app.Activity;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioTrack;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
    private static final String TAG = "MainActivity";
    private Button playBtn;
    private AudioTrack player;
    private int audioBufSize;
    private byte[] audioData;
    
    String  filePath  = "/sdcard/testmusic.pcm";
    private byte[] abc;
    int offset;
    Player player1;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        audioBufSize = AudioTrack.getMinBufferSize(44100, 
        AudioFormat.CHANNEL_OUT_STEREO, 
        AudioFormat.ENCODING_PCM_16BIT);
        
        player = new AudioTrack(AudioManager.STREAM_MUSIC,
         44100,
         AudioFormat.CHANNEL_OUT_STEREO,
         AudioFormat.ENCODING_PCM_16BIT,
         audioBufSize,
         AudioTrack.MODE_STREAM);
 
        playBtn = (Button)findViewById(R.id.button1);
        
        playBtn.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				player.play();			
				player1=new Player();
				player1.start();
            }
        });
    }
 class Player extends Thread{
    	byte[] data1=new byte[audioBufSize*2];
    	File file=new File(filePath);
    	int off1=0;
    	FileInputStream fileInputStream;
		
    	@Override
    	public void run() {
    		// TODO Auto-generated method stub
    		super.run();	
    		while(true){
    			try {
    				fileInputStream=new FileInputStream(file);
    				fileInputStream.skip((long)off1);
        			fileInputStream.read(data1,0,audioBufSize*2);
        			off1 +=audioBufSize*2;    			
    			} catch (Exception e) {
    				// TODO: handle exception
    			}
                player.write(data1, offset, audioBufSize * 2);			 
			}
    	}
    }
}

public void rec(){
    MediaRecorder recorder = new MediaRecorder();
    recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    recorder.setOutputFile(PATH_NAME);
    recorder.prepare();
    recorder.start(); // 开始录音
    ...
    recorder.stop();
    recorder.reset(); // You can reuse the object by going back to setAudioSource() step
    recorder.release(); // Now the object cannot be reused
}