service之startService()>音乐播放器的例子

/**
 * MusicService.java
 * com.androidtest.service
 *
 * Function： TODO 
 *
 *   ver     date              author
 * ──────────────────────────────────
 *            2011-5-15         Leon
 *
 * Copyright (c) 2011, TNT All Rights Reserved.
*/

package com.zuiniuwang.service;
import java.io.Serializable;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;
import com.zuiniuwang.*;



/**
 * ClassName:MusicService
 * Function: TODO ADD FUNCTION
 * Reason:     TODO ADD REASON
 *
 * @author   Leon
 * @version  
 * @since    Ver 1.1
 * @Date     2011-5-15
 */
public class NormalMusicService extends Service{

    private  String  TAG = NormalMusicService.class.getSimpleName();
    private  MediaPlayer myMediaPlayer ;
    public   static final  String INTENT_KEY= "action" ;
    @Override
    public IBinder onBind(Intent arg0) { 
        
        // TODO Auto-generated method stub
        return null;
        
    }

    @Override
    public void onCreate() {
        
        // TODO Auto-generated method stub
        Log.v(TAG , TAG+ " onCreate()");
        super.onCreate();
        if(myMediaPlayer==null){
            myMediaPlayer=MediaPlayer.create(this, R.raw.test) ; 
            myMediaPlayer.setLooping(false);
        }
    }

    @Override
    public void onStart(Intent intent, int startId) {    
        // TODO Auto-generated method stub
        Log.v(TAG , TAG + " onStart()");
        super.onStart(intent, startId);
        if(intent!=null){
            MyMediaController mediaControl =(MyMediaController)intent.getSerializableExtra(NormalMusicService.INTENT_KEY);
            mediaControl.mediaPlayer=myMediaPlayer;
            mediaControl.execute();
        }
    }

    
    @Override
    public void onDestroy() {
        
        // TODO Auto-generated method stub
        super.onDestroy();
        Log.v(TAG , " onDestroy");
        if(myMediaPlayer!=null){
            myMediaPlayer.stop();
            myMediaPlayer.release();
        }
        
    }
    
}

package com.zuiniuwang.playeractivity;

/**
 * MusicPlayer.java
 * com.androidtest.activity
 *
 * Function： TODO 
 *
 *   ver     date              author
 * ──────────────────────────────────
 *            2011-5-15         Leon
 *
 * Copyright (c) 2011, TNT All Rights Reserved.
 */



import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

import com.zuiniuwang.MyMediaController;
import com.zuiniuwang.R;
import com.zuiniuwang.service.NormalMusicService;






/**
 * ClassName:MusicPlayer Function: TODO ADD FUNCTION Reason: TODO ADD REASON
 * 
 * @author Leon
 * @version
 * @since Ver 1.1
 * @Date 2011-5-15
 */
public class NormalMusicPlayerActivity extends Activity implements OnClickListener {
    private static final String TAG = NormalMusicPlayerActivity.class.getSimpleName();
    private Intent intent ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.music_player_layout);
        Button playButton = (Button) this.findViewById(R.id.play);
        playButton.setOnClickListener(this);
        Button pauseButton =(Button) this.findViewById(R.id.pause);
        pauseButton.setOnClickListener(this);
        Button stopButton =(Button)this.findViewById(R.id.stop);
        stopButton.setOnClickListener(this);
        Button closeActivityButton =(Button)this.findViewById(R.id.close);
        closeActivityButton.setOnClickListener(this);
        Button exitActivityButton =(Button)this.findViewById(R.id.exit);
        exitActivityButton.setOnClickListener(this);
        
        intent = new Intent("com.androidtest.service.mediaplayer.NormalMusicService");

    }

    private void playAction(MyMediaController playType) {
        
        Bundle bundle = new Bundle();
        bundle.putSerializable(NormalMusicService.INTENT_KEY, playType);
        intent.putExtras(bundle);
        NormalMusicPlayerActivity.this.startService(intent);
    }
    
    public void onClick(View view) {

        // TODO Auto-generated method stub
        switch (view.getId()) {
        case R.id.play:
            Log.d(TAG, "play.......");
            playAction(MyMediaController.play);
            break;
        case R.id.pause:
            Log.d(TAG, "pause.......");
            playAction(MyMediaController.pause);
            break;
        case R.id.stop:
            Log.d(TAG, "stop.......");
            playAction(MyMediaController.stop);
            break;
        case R.id.close:
            Log.d(TAG, "close.......");
            this.finish();
            break;
        case R.id.exit:
            Log.d(TAG, "exit.......");
            stopService(intent);
            this.finish();
    
        }

    }


}

/**
 * MyMediaController.java
 * com.androidtest.service.mediaplayer
 *
 * Function： TODO 
 *
 *   ver     date              author
 * ──────────────────────────────────
 *            2011-5-16         Leon
 *
 * Copyright (c) 2011, TNT All Rights Reserved.
 */

package com.zuiniuwang;

import java.io.Serializable;

import android.media.MediaPlayer;

/**
 * ClassName:MyMediaController 
 * Function: Mediaplayer 的一个控制类，控制播放器的播放 暂停 停止 等动作
 * REASON
 * 
 * @author Leon
 * @version
 * @since Ver 1.1
 * @Date 2011-5-16
 */
public enum MyMediaController implements Serializable {
    play {
        @Override
        public void execute() {
            if (mediaPlayer != null && !mediaPlayer.isPlaying())
                mediaPlayer.start();
            // TODO Auto-generated method stub
        }

    },
    pause {

        @Override
        public void execute() {

            // TODO Auto-generated method stub
            if (mediaPlayer != null && mediaPlayer.isPlaying()) {
                mediaPlayer.pause();
            }
        }

    },
    stop {
        @Override
        public void execute() {
            // TODO Auto-generated method stub
            if (mediaPlayer != null) {
                mediaPlayer.stop();
                try {
                    // 在stop后如果要重新Start需要prepare一下
                    mediaPlayer.prepare();
                    // 从头播放
                    mediaPlayer.seekTo(0);

                } catch (Exception e) {

                    // TODO Auto-generated catch block
                    e.printStackTrace();

                }
            }
        }

    };
    public static MediaPlayer mediaPlayer;


    public abstract void execute();
}

（在F:\java\s服务\51CTO下载-musicservice1\musicservice）