android AIDL实现详解

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AIDL接口描述语言，在android中用来实现IPC非常方便。

一.服务端

1.在工程A中是实现AIDL文件IMyService.aidl,写法无误会在gen目录下自动生成IMyService.java

package com.jyc.aidl.demo;interface IMyService{String getValue(String key);}

2.创建Service，onBind()函数需要返回IMyService.Stub对象，AIDL中定义的函数在Stub中实现，最后在AndroidMainifest.xml中注册此Service，需要定义此Service的action，这样客户端才能用Intent来绑定此Service。

package com.jyc.demo.outmode;import com.jyc.aidl.demo.IMyService;import android.app.Service;import android.content.Intent;import android.os.IBinder;import android.os.RemoteException;public class MyService extends Service {int i =0;@Overridepublic IBinder onBind(Intent arg0) {return new IMyService.Stub(){@Overridepublic String getValue(String key) throws RemoteException {i++;return "from service:"+i;}};}}

二.客户端

1.拷贝服务端中gen下面由aidl自动生成的java文件（连带包路径一起）至客户端的src中，这样才可以调用服务端的接口

2.用bindServiced的方式启动service代码如下

package com.jyc.aidl.client.demo;import com.jyc.aidl.demo.IMyService;import android.app.Activity;import android.content.ComponentName;import android.content.Context;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.os.RemoteException;import android.view.View;import android.widget.Button;public class AIDLClientActivity extends Activity {private Button but;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        bindMyService();        but = (Button)findViewById(R.id.button1);        but.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {try {but.setText(myService.getValue("aa"));} catch (RemoteException e) {e.printStackTrace();}}});    }        private void bindMyService(){    this.bindService(new Intent("com.jyc.MYSERVICE.AIDL"), conn, Context.BIND_AUTO_CREATE);    }        IMyService myService = null;        ServiceConnection conn = new ServiceConnection() {@Overridepublic void onServiceDisconnected(ComponentName name) {myService = null;}@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {myService = IMyService.Stub.asInterface(service);}};}

工程下载地址：

http://download.csdn.net/detail/jiang4920/4697723