利用Service制作音乐播放器的步骤：（1）新建工程music，包名：com.music，Activity的名字：MusicActivity。（2） 在res/layout/main.xml中写入如下代码： （3） 放入音乐资源。在res下新建文件夹raw,在该文件夹中发如音乐文件：如：poker_face.mp3注意：a.若新建文件夹名字不为raw，会出错 b音乐文件的名字必须是:az09_.组成，不能有大写字母。（4） 编写MusicActivity,源代码为：package com.music;import android.app.Activity;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class MusicActivity extends Activity /为日志工具设置标签 private static String TAG = MusicService; /* Called when the activity is first created. */ Override public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.main); /输出Toast消息和日志记录 Toast.makeText(this, MusicServiceActivity, Toast.LENGTH_SHORT).show(); Log.e(TAG, MusicServiceActivity); initlizeViews(); private void initlizeViews() Log.e(initlizeviews, 初始化界面); Button btnStart = (Button)findViewById(R.id.startMusic); Button btnStop = (Button)findViewById(R.id.stopMusic); Button btnBind = (Button)findViewById(R.id.bindMusic); Button btnUnbind = (Button)findViewById(R.id.unbindMusic); Log.e(MusicActivity, 获得组件ID号); /定义点击监听器 OnClickListener ocl = new OnClickListener() Override public void onClick(View v) /显示指定 intent所指的对象是个 service Log.e(MusicActivity, 点击了启动按钮); Intent intent = new Intent(MusicActivity.this,MusicService.class); switch(v.getId() case R.id.startMusic: /开始服务 Log.e(MusicActivity, 即将启动服务); startService(intent); Log.e(MusicActivity, 启动完毕); break; case R.id.stopMusic: /停止服务 Log.e(MusicActivity, 即将停止服务); stopService(intent); Log.e(MusicActivity, 停止完毕); break; case R.id.bindMusic: /绑定服务 Log.e(MusicActivity, 绑定服务); bindService(intent, conn, Context.BIND_AUTO_CREATE); Log.e(MusicActivity, 绑定完毕); break; case R.id.unbindMusic: /解绑服务 Log.e(MusicActivity, 解除绑定服务); unbindService(conn); Log.e(MusicActivity, 解除完毕); break; ; /绑定点击监听 btnStart.setOnClickListener(ocl); btnStop.setOnClickListener(ocl); btnBind.setOnClickListener(ocl); btnUnbind.setOnClickListener(ocl); /定义服务链接对象 final ServiceConnection conn = new ServiceConnection() Override /Toast.LENGTH_SHORT大概显示时间为1秒， / Toast.LENGTH_LONG大概显示时间为3秒 public void onServiceDisconnected(ComponentName name) Toast.makeText(MusicActivity.this, MusicActivity onSeviceDisconnected , Toast.LENGTH_SHORT).show(); Log.e(TAG, MusicActivity onSeviceDisconnected); Override public void onServ