Android AIDL Service

AIDL Service //跨进程调用Service
    一个APK想调用另一个APK中的Service 如何实现
AIDL //定义两个进程之间的通信接口

Demo1 传递简单数据

AidlService

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();
}

AidlClient

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();
}