public class AidlService extends Service {

    private CatBinder catBinder;

    Timer timer = new Timer();

    String[] colors = new String[] { "红色", "黄色", "黑色" };

    double[] weights = new double[] { 2.3, 3.1, 1.58 };

    private String color;

    private double weight;

    // 继承Stub，也就是实现额ICat接口，并实现了IBinder接口

    public class CatBinder extends Stub {

        @Override

        public String getColor() throws RemoteException {

            return color;

        }

        @Override

        public double getWeight() throws RemoteException {

            return weight;

        }

    }

    @Override

    public void onCreate() {

        super.onCreate();

        catBinder = new CatBinder();

        timer.schedule(new TimerTask() {

            @Override

            public void run() {

                // 随机地改变Service组件内color、weight属性的值。

                int rand = (int) (Math.random() * 3);

                color = colors[rand];

                weight = weights[rand];

                System.out.println("--------" + rand);

            }

        }, 0, 800);

    }

    @Override

    public IBinder onBind(Intent arg0) {

        /*

         * 返回catBinder对象 在绑定本地Service的情况下，该catBinder对象会直接

         * 传给客户端的ServiceConnection对象 的onServiceConnected方法的第二个参数；

         * 在绑定远程Service的情况下，只将catBinder对象的代理 传给客户端的ServiceConnection对象

         * 的onServiceConnected方法的第二个参数；

         */

        return catBinder;

    }

    @Override

    public void onDestroy() {

        timer.cancel();

    }

}

package com.example.aidlservice;

interface ICat

{

    String getColor();

    double getWeight();

}

public class MainActivity extends Activity {

    private ICat catService;

    private Button get;

    EditText color, weight;

    private ServiceConnection conn = new ServiceConnection() {

        @Override

        public void onServiceConnected(ComponentName name, IBinder service) {

            // 获取远程Service的onBind方法返回的对象的代理

            catService = ICat.Stub.asInterface(service);

        }

        @Override

        public void onServiceDisconnected(ComponentName name) {

            catService = null;

        }

    };

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        get = (Button) findViewById(R.id.get);

        color = (EditText) findViewById(R.id.color);

        weight = (EditText) findViewById(R.id.weight);

        // 创建所需绑定的Service的Intent

        Intent intent = new Intent();

        intent.setAction("com.example.aidlservice.AIDL_SERVICE");

        // 绑定远程Service

        bindService(intent, conn, Service.BIND_AUTO_CREATE);

        get.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View arg0) {

                try {

                    // 获取、并显示远程Service的状态

                    color.setText(catService.getColor());

                    weight.setText(catService.getWeight() + "");

                } catch (RemoteException e) {

                    e.printStackTrace();

                }

            }

        });

    }

    @Override

    public void onDestroy() {

        super.onDestroy();

        // 解除绑定

        this.unbindService(conn);

    }

}

package com.example.aidlservice;

interface ICat

{

    String getColor();

    double getWeight();

}