MediaPlayer播放音乐

MainActivity.java:

package com.sound.test;

import java.io.IOException;

import android.app.Activity;
import android.content.res.AssetFileDescriptor;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
 private Button button_play;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        findViews();
        setListeners();
    }

    private void findViews() {
  // TODO Auto-generated method stub
     button_play=(Button) findViewById(R.id.button1);
 }

 private void setListeners() {
  // TODO Auto-generated method stub
  button_play.setOnClickListener(new OnClickListener() {   
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    //raw下播放音乐1
    //MediaPlayer.create(MainActivity.this, R.raw.a_place_nearby).start();
    try {
     //assets下播放音乐
     AssetFileDescriptor afd=getResources().getAssets().openFd("sound/a_place_nearby.mp3");

     MediaPlayer mediaPlayer=new MediaPlayer();
     mediaPlayer.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
     mediaPlayer.prepare();
     mediaPlayer.start();
    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }
  });
 }

 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}