【讨论】通过bindService启动的service，在unbindService后service也结束了

这个问题以前讨论过，各个文档blog上也是这么写的，但有人还是说即使unbindService了，service还是会继续运行。
但刚才验证，unbindService后，执行了service的onDestroy方法，service也停止了。
下面是一个通过servcie来实现计数的功能，并且在activity中显示出此计数
1.接口ICountService.java，只有一个返回计数值的函数声明

package com.min.localservicedemo;



public interface ICountService {

	public abstract int getCount();

}

2.服务类CountService.java，用于实现计数功能，在一个新线程中执行，并更新view显示当前计数值

package com.min.localservicedemo;



import android.app.Service;

import android.content.Intent;

import android.os.Binder;

import android.os.IBinder;

import android.util.Log;



public class CountService extends Service implements ICountService {

	private static final String TAG = "CountService";

	private boolean threadDisable;

	private int count;

	private ServiceBinder serviceBinder = new ServiceBinder();

	

	public class ServiceBinder extends Binder implements ICountService {



		public int getCount() {

			// TODO Auto-generated method stub

			return count;

		}

		

	}

	

	public int getCount() {

		// TODO Auto-generated method stub

		return count;

	}



	@Override

	public IBinder onBind(Intent arg0) {

		// TODO Auto-generated method stub

		return serviceBinder;

	}



	@Override

	public void onCreate() {

		// TODO Auto-generated method stub

		super.onCreate();

		

		new Thread(new Runnable() {

			public void run() {

				// TODO Auto-generated method stub

				while(!threadDisable) {

					try {

						Thread.sleep(1000);

					} catch (InterruptedException e) {

						e.printStackTrace();

					}

					count++;

					Log.d(TAG, "count is " + count);

					

					updateCount();

				}

			}

		}

		).start();

	}



	@Override

	public void onStart(Intent intent, int startId) {

		// TODO Auto-generated method stub

		super.onStart(intent, startId);

	}



	@Override

	public boolean onUnbind(Intent intent) {

		// TODO Auto-generated method stub

		return super.onUnbind(intent);

	}



	@Override

	public void onDestroy() {

		// TODO Auto-generated method stub

		super.onDestroy();

		threadDisable = true;

		Log.d(TAG, "onDestroy");

	}



	/**

	 * Update view

	 */

	public void updateCount() {

		LocalServiceDemo.getMyHandler().sendEmptyMessage(1);

	}

}

3.Activity类LocalServiceDemo.java，显示当前的计数值

package com.min.localservicedemo;



import android.app.Activity;

import android.content.ComponentName;

import android.content.Intent;

import android.content.ServiceConnection;

import android.os.Bundle;

import android.os.Handler;

import android.os.IBinder;

import android.os.Message;

import android.util.Log;

import android.widget.TextView;



public class LocalServiceDemo extends Activity {

	private static final String TAG = "LocalServiceDemo";

	

	private static TextView tvCount;

	private static ICountService countService;

	

	private static MyHandler myHandler = MyHandler.getInstance();

	

	private ServiceConnection serviceConnection = new ServiceConnection() {



		public void onServiceConnected(ComponentName name, IBinder service) {

			// TODO Auto-generated method stub

			countService = (ICountService)service;

			Log.d(TAG, "onServiceConnected count is " + countService.getCount());

			tvCount.setText("Count:" + countService.getCount());

		}



		public void onServiceDisconnected(ComponentName name) {

			// TODO Auto-generated method stub

			countService = null;

		}

		

	};

	

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        

        tvCount = (TextView)findViewById(R.id.tvCount);

        this.bindService(new Intent("com.min.localservicedemo.CountService"),

        		serviceConnection, BIND_AUTO_CREATE);

    }



	@Override

	protected void onDestroy() {

		// TODO Auto-generated method stub

		super.onDestroy();

		this.unbindService(serviceConnection);

		Log.d(TAG, "onDestroy unbindService");

	}

    

    public static class MyHandler extends Handler {

    	private static MyHandler myHandler = null;

    	

    	private MyHandler() {

    	}

    	

    	/**

    	 * Single Instance

    	 * @return

    	 */

    	public static MyHandler getInstance() {

    		if (myHandler == null) {

    			myHandler = new MyHandler();

    		}

    		return myHandler;

    	}

    	

		@Override

		public void handleMessage(Message msg) {

			// TODO Auto-generated method stub

			if(msg.what == 1) {

				tvCount.setText("Count:" + countService.getCount());

			}

			

			super.handleMessage(msg);

		}

    	

    }

    

    public static MyHandler getMyHandler() {

    	return myHandler;

    }

}

4.log输出
03-26 01:33:16.710: INFO/ActivityManager(59): Starting activity: Intent {

act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000

cmp=com.min.localservicedemo/.LocalServiceDemo }
03-26 01:33:17.480:

DEBUG/LocalServiceDemo(349): onServiceConnected count is 0
03-26 01:33:17.580:

INFO/ActivityManager(59): Displayed activity com.min.localservicedemo/.LocalServiceDemo:

666 ms (total 666 ms)
03-26 01:33:18.329: DEBUG/CountService(349): count is 1
03-26

01:33:19.388: DEBUG/CountService(349): count is 2
03-26 01:33:20.453: DEBUG/CountService

(349): count is 3
03-26 01:33:21.506: DEBUG/CountService(349): count is 4
03-26

01:33:22.573: DEBUG/CountService(349): count is 5
03-26 01:33:22.850: DEBUG/dalvikvm(127):

GC_EXPLICIT freed 227 objects / 11056 bytes in 168ms
03-26 01:33:23.612:

DEBUG/CountService(349): count is 6
03-26 01:33:24.671: DEBUG/CountService(349): count is

7
03-26 01:33:25.738: DEBUG/CountService(349): count is 8
03-26 01:33:26.804:

DEBUG/CountService(349): count is 9
03-26 01:33:27.871: DEBUG/CountService(349): count is

10
03-26 01:33:28.531: WARN/KeyCharacterMap(349): No keyboard for id 0
03-26 01:33:28.531:

WARN/KeyCharacterMap(349): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
03-26

01:33:28.871: DEBUG/CountService(349): count is 11
03-26 01:33:29.231:

DEBUG/LocalServiceDemo(349): onDestroy unbindService
03-26 01:33:29.340:

DEBUG/CountService(349): onDestroy
03-26 01:33:29.941: DEBUG/CountService(349): count is

12
03-26 01:34:54.540: DEBUG/SntpClient(59): request time failed: java.net.SocketException:

Address family not supported by protocol

Log截图

可以在log中看到，当退出activity时，执行了onDestroy函数的unbindService
然后又执行了CountService类的onDestroy，这时候service就结束了。

我是这么理解的，如果在unbindService后，service还能继续存在，那么就是我理解的有偏差。
欢迎各抒己见。