深入理解Android的startservice和bindservice

public class MainActivity extends Activity {
    Button startServiceButton;// 启动服务按钮
    Button shutDownServiceButton;// 关闭服务按钮
    Button startBindServiceButton;// 启动绑定服务按钮
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        getWidget();
        regiestListener();
    }

    /** 获得组件 */
    public void getWidget() {
        startServiceButton = (Button) findViewById(R.id.startServerButton);
        startBindServiceButton = (Button) findViewById(R.id.startBindServerButton);
        shutDownServiceButton = (Button) findViewById(R.id.sutdownServerButton);
    }

    /** 为按钮添加监听 */
    public void regiestListener() {
        startServiceButton.setOnClickListener(startService);
        shutDownServiceButton.setOnClickListener(shutdownService);
        startBindServiceButton.setOnClickListener(startBinderService);
    }
    
    
    /** 启动服务的事件监听 */
    public Button.OnClickListener startService = new Button.OnClickListener() {
        public void onClick(View view) {
            /** 单击按钮时启动服务 */
            Intent intent = new Intent(MainActivity.this,
                    CountService.class);
            startService(intent);
            
            Log.v("MainStadyServics", "start Service");
        }
    };
    /** 关闭服务 */
    public Button.OnClickListener shutdownService = new Button.OnClickListener() {
        public void onClick(View view) {
            /** 单击按钮时启动服务 */
            Intent intent = new Intent(MainActivity.this,
                    CountService.class);
            /** 退出Activity是，停止服务 */
            stopService(intent);
            Log.v("MainStadyServics", "shutDown serveice");
        }
    };
    /** 打开绑定服务的Activity */
    public Button.OnClickListener startBinderService = new Button.OnClickListener() {
        public void onClick(View view) {
            /** 单击按钮时启动服务 */
            Intent intent = new Intent(MainActivity.this, UseBrider.class);
            startActivity(intent);
            Log.v("MainStadyServics", "start Binder Service");
        }
    };
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

package com.example.testservice;

/**引入包*/
import android.app.Service;// 服务的类
import android.os.IBinder;
import android.os.Binder;
import android.content.Intent;
import android.util.Log;

/** 计数的服务 */
public class CountService extends Service {
    /** 创建参数 */
    boolean threadDisable;
    int count;

    public IBinder onBind(Intent intent) {
        return null;
    }

    public void onCreate() {
        super.onCreate();
        /** 创建一个线程，每秒计数器加一，并在控制台进行Log输出 */
        new Thread(new Runnable() {
            public void run() {
                while (!threadDisable) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {

                    }
                    count++;
                    Log.v("CountService", "Count is" + count);
                }
            }
        }).start();
    }

    public void onDestroy() {
        super.onDestroy();
        /** 服务停止时，终止计数进程 */
        this.threadDisable = true;
    }

    public int getConunt() {
        return count;
    }

//此方法是为了可以在Acitity中获得服务的实例   

class ServiceBinder extends Binder {
        public CountService getService() {
            return CountService.this;
        }
    }
}

package com.example.testservice;

/**引入包*/
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;

/** 通过bindService和unBindSerivce的方式启动和结束服务 */
public class UseBrider extends Activity {
    /** 参数设置 */
    CountService countService;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new UseBriderFace(this));
        
        Intent intent = new Intent(UseBrider.this, CountService.class);
        /** 进入Activity开始服务 */
        bindService(intent, conn, Context.BIND_AUTO_CREATE);

    }

    
    private ServiceConnection conn = new ServiceConnection() {
        /** 获取服务对象时的操作 */
        public void onServiceConnected(ComponentName name, IBinder service) {
            // TODO Auto-generated method stub
            countService = ((CountService.ServiceBinder) service).getService();

        }

        /** 无法获取到服务对象时的操作 */
        public void onServiceDisconnected(ComponentName name) {
            // TODO Auto-generated method stub
            countService = null;
        }

    };

    protected void onDestroy() {
        super.onDestroy();
        this.unbindService(conn);
        Log.v("MainStadyServics", "out");
    }
}

public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        System.out.println("onBind.....");
         IBinder result = null;  
            if ( null == result ) result = new MyBinder() ;
        Toast.makeText(this, "onBind",Toast.LENGTH_LONG);
        return result;
    }