MyserviceDelegate delegate;
    
    private MyServiceConnection connection;
    
    private class MyServiceConnection implements ServiceConnection {

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            // TODO Auto-generated method stub
            delegate = (MyserviceDelegate) service;
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            // TODO Auto-generated method stub
            
        }
        
    }
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        connection = new MyServiceConnection();
        
        Intent it = new Intent();
        it.setClass(this, Myservice.class);
        
        bindService(it, connection, BIND_AUTO_CREATE);
        
        
    }

//代理

public interface MyserviceDelegate {
    public void helloWorld();
}

// 服务

public class Myservice extends Service {
    
    private class MyBinder extends Binder implements MyserviceDelegate{

        @Override
        public void helloWorld() {
            
            sayHelloWorld();
        }
        
    }
    
    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return new MyBinder();
    }   
    
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
    }
    
    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
    }
    
    public void sayHelloWorld() {
        
    }
    
}