<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:orientation="vertical" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 > 
 <TextView 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:text="Welcome to Andy's blog!" 
  android:textSize="16sp"/>  
 <TextView 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content" 
  android:text="音樂播放服務(wù)"/> 
 <Button 
  android:id="@+id/startMusic" 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" 
  android:text="開啟音樂播放服務(wù)"/> 
 <Button 
  android:id="@+id/stopMusic" 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" 
  android:text="停止音樂播放服務(wù)"/> 
 <Button 
  android:id="@+id/bindMusic" 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" 
  android:text="綁定音樂播放服務(wù)"/> 
 <Button 
  android:id="@+id/unbindMusic" 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" 
  android:text="解除 ——綁定音樂播放服務(wù)"/> 
</LinearLayout> 

package com.andyidea.service; 
import android.app.Service; 
import android.content.Intent; 
import android.media.MediaPlayer; 
import android.os.IBinder; 
import android.util.Log; 
import android.widget.Toast; 
public class MusicService extends Service { 
 //為日志工具設(shè)置標(biāo)簽 
 private static String TAG = "MusicService"; 
 //定義音樂播放器變量 
 private MediaPlayer mPlayer; 
  
 //該服務(wù)不存在需要被創(chuàng)建時(shí)被調(diào)用，不管startService()還是bindService()都會啟動時(shí)調(diào)用該方法 
 @Override 
 public void onCreate() { 
  Toast.makeText(this, "MusicSevice onCreate()" 
    , Toast.LENGTH_SHORT).show(); 
  Log.e(TAG, "MusicSerice onCreate()"); 
   
  mPlayer = MediaPlayer.create(getApplicationContext(), R.raw.music); 
  //設(shè)置可以重復(fù)播放 
  mPlayer.setLooping(true); 
  super.onCreate(); 
 } 
  
 @Override 
 public void onStart(Intent intent, int startId) { 
  Toast.makeText(this, "MusicSevice onStart()" 
    , Toast.LENGTH_SHORT).show(); 
  Log.e(TAG, "MusicSerice onStart()"); 
   
  mPlayer.start(); 
   
  super.onStart(intent, startId); 
 } 
 @Override 
 public void onDestroy() { 
  Toast.makeText(this, "MusicSevice onDestroy()" 
    , Toast.LENGTH_SHORT).show(); 
  Log.e(TAG, "MusicSerice onDestroy()"); 
   
  mPlayer.stop(); 
   
  super.onDestroy(); 
 } 
 //其他對象通過bindService 方法通知該Service時(shí)該方法被調(diào)用 
 @Override 
 public IBinder onBind(Intent intent) { 
  Toast.makeText(this, "MusicSevice onBind()" 
    , Toast.LENGTH_SHORT).show(); 
  Log.e(TAG, "MusicSerice onBind()"); 
   
  mPlayer.start(); 
   
  return null; 
 } 
 //其它對象通過unbindService方法通知該Service時(shí)該方法被調(diào)用 
 @Override 
 public boolean onUnbind(Intent intent) { 
  Toast.makeText(this, "MusicSevice onUnbind()" 
    , Toast.LENGTH_SHORT).show(); 
  Log.e(TAG, "MusicSerice onUnbind()"); 
   
  mPlayer.stop(); 
   
  return super.onUnbind(intent); 
 } 
  
} 

package com.andyidea.service; 
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 MusicServiceActivity extends Activity { 
  
 //為日志工具設(shè)置標(biāo)簽 
 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); 
   
  //輸出Toast消息和日志記錄 
  Toast.makeText(this, "MusicServiceActivity", 
    Toast.LENGTH_SHORT).show(); 
  Log.e(TAG, "MusicServiceActivity"); 
   
  initlizeViews(); 
 } 
  
 private void initlizeViews(){ 
  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); 
   
  //定義點(diǎn)擊監(jiān)聽器 
  OnClickListener ocl = new OnClickListener() { 
    
   @Override 
   public void onClick(View v) { 
    //顯示指定 intent所指的對象是個(gè) service 
    Intent intent = new Intent(MusicServiceActivity.this,MusicService.class); 
    switch(v.getId()){ 
    case R.id.startMusic: 
     //開始服務(wù) 
     startService(intent); 
     break; 
    case R.id.stopMusic: 
     //停止服務(wù) 
     stopService(intent); 
     break; 
    case R.id.bindMusic: 
     //綁定服務(wù) 
     bindService(intent, conn, Context.BIND_AUTO_CREATE); 
     break; 
    case R.id.unbindMusic: 
     //解綁服務(wù) 
     unbindService(conn); 
     break; 
    } 
   } 
  }; 
   
   //綁定點(diǎn)擊監(jiān)聽 
  btnStart.setOnClickListener(ocl); 
  btnStop.setOnClickListener(ocl); 
  btnBind.setOnClickListener(ocl); 
  btnUnbind.setOnClickListener(ocl); 
 } 
  
 //定義服務(wù)鏈接對象 
 final ServiceConnection conn = new ServiceConnection() { 
   
  @Override 
  public void onServiceDisconnected(ComponentName name) { 
   Toast.makeText(MusicServiceActivity.this, "MusicServiceActivity onSeviceDisconnected" 
     , Toast.LENGTH_SHORT).show(); 
   Log.e(TAG, "MusicServiceActivity onSeviceDisconnected"); 
  } 
   
  @Override 
  public void onServiceConnected(ComponentName name, IBinder service) { 
   Toast.makeText(MusicServiceActivity.this, "MusicServiceActivity onServiceConnected" 
     ,Toast.LENGTH_SHORT).show(); 
   Log.e(TAG, "MusicServiceActivity onServiceConnected"); 
  } 
 }; 
}