package com.example.android_server.aidlService;import android.app.Service;import android.content.Intent;import android.os.IBinder;import android.os.RemoteException;import com.example.android_server.aidlService.IStudent.Stub;public class MyAIDLService extends Service {    StudentBinder binder=null;    @Override    public void onCreate() {        super.onCreate();        binder=new StudentBinder();    }    @Override    public IBinder onBind(Intent intent) {        return binder;    }    /**     * 自定义一个Binder,继承存根类     *      * @author Administrator     *      */    public class StudentBinder extends Stub {        @Override        public int getCount() throws RemoteException {            return 1;        }    }}

IStudent.aidl

package com.example.android_server.aidlService;interface IStudent{int getCount();}

在manifest中注册服务:

 

另一个项目中的调用该Service

package com.example.android_serviceclient;import android.app.Activity;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.Handler;import android.os.IBinder;import android.os.Message;import android.os.RemoteException;import android.widget.TextView;import android.widget.Toast;import com.example.android_server.aidlService.IStudent;import com.example.android_server.aidlService.IStudent.Stub;public class MainActivity extends Activity implements Handler.Callback {    private IStudent iStudent;    private TextView textView=null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        textView=(TextView) findViewById(R.id.text);                Intent intent = new Intent();        intent.setAction("com.example.aidlservice");        startService(intent);        bindService(intent, connection, BIND_AUTO_CREATE);                Handler handler = new Handler(this);        handler.sendEmptyMessageDelayed(1, 2000);    }    private ServiceConnection connection = new ServiceConnection() {        @Override        public void onServiceDisconnected(ComponentName name) {        }        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            System.out.println("onServiceConnected");            iStudent=Stub.asInterface(service);        }    };    @Override    public boolean handleMessage(Message msg) {        try {            textView.setText(iStudent.getCount() +"");            Toast.makeText(MainActivity.this, "得到的值:"+iStudent.getCount() + "", 200)                    .show();        } catch (RemoteException e) {            e.printStackTrace();        }        return false;    }}

aidl是Android Interface definition language的缩写，它是一种android内部进程通信接口的描述语言，通过它我们可以定义进程间的通信接口.