Service启动模式

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 案例： 

<Button
	           android:id="@+id/btn_start"
		   android:layout_width="match_parent"
		   android:layout_height="wrap_parent"
		   android:layout_alignParentTop="true"
		   android:layout_centerHorizontal="true"
		   android:layout_marginTop="50dp"
		   android:onClick="doStart"
		   android:text="Start Service"/>

               <Button
	           android:layout_marginTop="20dp"
	           android:id="@+id/btn_stop"
		   android:layout_width="match_parent"
		   android:layout_height="wrap_parent"
		   android:layout_alignParentTop="true"
		   android:layout_centerHorizontal="true"
		   android:layout_marginTop="50dp"
		   android:onClick="doStop"
		   android:text="Start Service"/>

public void doStart(View view){
		       Intent intent = new Intent(this,SampleService.class);
		       startService(intent);
		}

		public void doStop(View view){
		   Intent intent = new Intent(this,SampleService.class);
		       stopService(intent);
		}

public class SampleService exteds Service{
             
      public void onCreate(){
      Log.d(tag,"onCreate")
         super.onCreate();
      }

     
      public int onStartCommand(Intent intent,int flags,int startId){
      Log.d(tag,"onStartCommand");
      return super.onStartCommand(intent,flags,startId);

      }

      public void onDestroy(){
      Log.d(tag,"onDestroy");
         super.onDestroy();
      }
      
      
      }

<service android:name="com.edu.hpu.cn.SampleService"></service>

案例：

MainActivity:

package com.edu.hpu.service;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}
	
	public void startMusic(View view){
		Intent intent = new Intent(this,PlayerMusicService.class);
		startService(intent);
	}

	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		Intent intent = new Intent(this,PlayerMusicService.class);
		stopService(intent);
		super.onDestroy();
	}
	
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="136dp"
        android:onClick="startMusic"
        android:text="播放音乐" />

</RelativeLayout>

Service类：

package com.edu.hpu.service;

import java.io.IOException;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Environment;
import android.os.IBinder;

public class PlayerMusicService extends Service{
    private MediaPlayer player;
    
	@Override
	public void onCreate() {
             try {
				 player = new MediaPlayer();
				 player.reset();
				 player.setDataSource(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Music/Groove Coverage - She.mp3");
				 player.prepare();
				 player.start();
			} catch (IllegalArgumentException e) {
				// TODO: handle exception
				e.printStackTrace();
			}catch(SecurityException e){
				e.printStackTrace();
			}
             catch(IllegalStateException  e){
 				e.printStackTrace();
 			}
             catch(IOException  e){
  				e.printStackTrace();
  			}
	
	}
	
	@Override
	public void onDestroy() {
		// TODO Auto-generated method stub
		player.release();
		player = null;
		super.onDestroy();
	}
	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return null;
	}

}

配置：

 <service
         android:name="com.edu.hpu.service.PlayerMusicService"></service>

		   关于MediaPlayer
		      MediaPlayer支持主流的音频、视频文件的播放，亦支持播放
		      非本机的媒体文件；
		      MediaPlayer会开启子线程播放歌曲；
		      可调用pause()方法暂停播放，调用seekTo()方法快进到指定的
		      位置开始播放；
	              可调用prepareAsync()方法加载歌曲，并配置OnPreparedListener,
		      在监听器用调用MediaPlayer的start()方法；
		    通常为MediaPlayer配置OnCompletionListener,以实现在播放完成后的处理；

Service启动模式

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原文地址：http://blog.csdn.net/wojiaohuangyu/article/details/50403014