android基础（四）service

ServiceConnection conn=new ServiceConnection(){
//service与Activity建立连接后调用的两个方法，用于使用service中的服务     @Override
     publicvoid onServiceDisconnected(ComponentName arg0) {
               // TODO Auto-generated method stub               }
 
     @Override
     publicvoid onServiceConnected(ComponentName arg0, IBinder arg1) {
 
       //arg1为OnBind（）方法中返回的Binder对象， 可通过该对象获得service对象本身（在Binder类中有一个getService（）方法用于返回service对象本身）
       MyBinder binder=(MyBinder)arg1;
 
       //调用getService（）方法获得service对象本身
       BindService bindservice=binder.getService();
 
       //接下来便可调用service中的方法来实现一定功能
       String result=bindservice.service();
}
};

                    class BindService extends Service {
 
        // 实现onBind()方法返回一个Binder对象public IBinder onBind（Intent arg0）{
 
            return mybinder;
 
        }
 
   //内部类Mybinderclass MyBinder extends Binder{
 
         public BindService  getService(){
 
                return BindeService.this;
              }
        }
 
   //BindService中的方法，将使用binder.getService（）.service（）调用public String service（）{
          // 方法实现
        }
} 

                    //
                    Operation 1
        Intent startServiceIntent = new Intent("com.test.intentservice");  
        Bundle bundle = new Bundle();  
        bundle.putString("param", "oper1");  
        startServiceIntent.putExtras(bundle);  
        startService(startServiceIntent);  
          
        //Operation 2  
        Intent startServiceIntent2 = new Intent("com.test.intentservice");  
        Bundle bundle2 = new Bundle();  
        bundle2.putString("param", "oper2");  
        startServiceIntent2.putExtras(bundle2);  
        startService(startServiceIntent2);  

                    public
                    class IntentServiceDemo extends IntentService {  
  
    public IntentServiceDemo() {  
        //必须实现父类的构造方法  super("IntentServiceDemo");  
    }  
      
    @Override  
    public IBinder onBind(Intent intent) {  
        System.out.println("onBind");  
        returnsuper.onBind(intent);  
    }  
  
  
    @Override  
    publicvoid onCreate() {  
        System.out.println("onCreate");  
        super.onCreate();  
    }  
  
    @Override  
    publicvoid onStart(Intent intent, int startId) {  
        System.out.println("onStart");  
        super.onStart(intent, startId);  
    }  
  
  
    @Override  
    publicint onStartCommand(Intent intent, int flags, int startId) {  
        System.out.println("onStartCommand");  
        returnsuper.onStartCommand(intent, flags, startId);  
    }  
  
  
    @Override  
    protectedvoid onHandleIntent(Intent intent) {  
        //Intent是从Activity发过来的，携带识别参数，根据参数不同执行不同的任务  
        String action = intent.getExtras().getString("param");  
        if (action.equals("oper1")) {  
            System.out.println("Operation1");  
        }elseif (action.equals("oper2")) {  
            System.out.println("Operation2");  
        }  
          
        try {  
            Thread.sleep(2000);  
        } catch (InterruptedException e) {  
            e.printStackTrace();  
        }  
    }  
  
    @Override  
    publicvoid onDestroy() {  
        System.out.println("onDestroy");  
        super.onDestroy();  
    }  
  
}