< ?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="音樂播放服務(wù)" android:textsize="25sp" android:layout_margintop="10dp">
<button android:text="開啟音樂播放服務(wù)" android:textsize="20sp" android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margintop="10dp">
</button>
<button android:text="停止音樂播放服務(wù)" android:textsize="20sp" android:id="@+id/Button02" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margintop="10dp">
</button>

<button android:text="綁定音樂播放服務(wù)" android:textsize="20sp" android:id="@+id/Button03" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margintop="10dp">
</button>
<button android:text="解綁定音樂播放服務(wù)" android:textsize="20sp" android:id="@+id/Button04" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margintop="10dp">
</button>
</textview></linearlayout>

package android.basic.lesson14;

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
    String tag ="MusicService";    

    //定義音樂播放器變量
    MediaPlayer mPlayer;

    //其他對象通過bindService方法通知該Service時該方法會被調(diào)用
    @Override
    public IBinder onBind(Intent intent) {
        Toast.makeText(this,"MusicService onBind()",Toast.LENGTH_SHORT).show();
        Log.i(tag, "MusicService onBind()");
        mPlayer.start();
        return null;
    }

    //其他對象通過unbindService方法通知該Service時該方法會被調(diào)用
    @Override
    public boolean onUnbind(Intent intent){
        Toast.makeText(this, "MusicService onUnbind()", Toast.LENGTH_SHORT).show();
        Log.i(tag, "MusicService onUnbind()");
        mPlayer.stop();
        return false;
    }

    //該服務(wù)不存在需要被創(chuàng)建時被調(diào)用，不管startService()還是bindService()都會在啟動時調(diào)用該方法
    @Override
    public void onCreate(){
        Toast.makeText(this, "MusicService onCreate()", Toast.LENGTH_SHORT).show();
        //創(chuàng)建一個音樂播放器對象
        mPlayer=MediaPlayer.create(getApplicationContext(), R.raw.babayetu);
        //設(shè)置可以重復(fù)播放
        mPlayer.setLooping(true);
        Log.i(tag, "MusicService onCreate()");
    }

    //用startService方法調(diào)用該服務(wù)時，在onCreate()方法調(diào)用之后，會調(diào)用改方法
    @Override
    public void onStart(Intent intent,int startid){
        Toast.makeText(this,"MusicService onStart",Toast.LENGTH_SHORT).show();
        Log.i(tag, "MusicService onStart()");
        mPlayer.start();
    }

    //該服務(wù)被銷毀時調(diào)用該方法
    @Override
    public void onDestroy(){
        Toast.makeText(this, "MusicService onDestroy()", Toast.LENGTH_SHORT).show();
        mPlayer.stop();
        Log.i(tag, "MusicService onDestroy()");
    }
}

package android.basic.lesson14;

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 MainHelloService extends Activity {

    //為日志工具設(shè)置標(biāo)簽
    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(MainHelloService.this, "MainHelloService onCreate", Toast.LENGTH_SHORT).show();
        Log.i(tag, "MainHelloService onCreate");

    //定義組件對象
    Button b1= (Button)findViewById(R.id.Button01);
    Button b2= (Button)findViewById(R.id.Button02);
    Button b3= (Button)findViewById(R.id.Button03);
    Button b4= (Button)findViewById(R.id.Button04);

     //定義服務(wù)鏈接對象
     final ServiceConnection conn = new ServiceConnection(){

            @Override
            public void onServiceConnected(ComponentName name, IBinder service) {
                Toast.makeText(MainHelloService.this, "ServiceConnection onServiceConnected", Toast.LENGTH_SHORT).show();
                Log.i(tag, "ServiceConnection onServiceConnected");

            }

            @Override
            public void onServiceDisconnected(ComponentName name) {
                Toast.makeText(MainHelloService.this, "ServiceConnection onServiceDisconnected", Toast.LENGTH_SHORT).show();
                Log.i(tag, "ServiceConnection onServiceDisconnected");

            }};

        //定義點擊監(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Service
                Intent intent = new Intent(MainHelloService.this,android.basic.lesson14.MusicService.class);
                switch(v.getId()){
                case R.id.Button01:
                    //開始服務(wù)
                    startService(intent);
                    break;
                case R.id.Button02:
                    //停止服務(wù)
                    stopService(intent);
                    break;
                case R.id.Button03:
                    //綁定服務(wù)
                    bindService(intent,conn,Context.BIND_AUTO_CREATE);
                    break;
                case R.id.Button04:
                    //解除綁定
                    unbindService(conn);
                    break;
                }
            }
    };

    //綁定點擊監(jiān)聽器
    b1.setOnClickListener(ocl);
    b2.setOnClickListener(ocl);
    b3.setOnClickListener(ocl);
    b4.setOnClickListener(ocl);  

  }

  @Override
  public void onDestroy(){
      super.onDestroy();
        Toast.makeText(MainHelloService.this, "MainHelloService onDestroy", Toast.LENGTH_SHORT).show();
        Log.i(tag, "MainHelloService onDestroy");
  }
}