AIDL初体验

今天刚看了看AIDL，至于什么叫AIDL，网上都有，实现所谓的进程间通信。

 

也就是client和server进行通信。下面是我刚才看的demo。

 

首先是服务器端。。。

 

第一步 写一个aidl

IServer.aidl 定义接口，adt会自动在gen下面生成对应的java文件，该文件无需修改

 

 

package cx.aidl;

interface IServer{

    String getValueFromServer();
    
}

 

 

第二部 实现接口

 

package cx.aidl;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
import cx.aidl.IServer.Stub;

public class ServerService extends Service{

    
    public class ServerImple extends IServer.Stub{

        public String getValueFromServer() throws RemoteException {
            // TODO Auto-generated method stub
            return "this is get from the server";
        }

        public IBinder asBinder() {
            // TODO Auto-generated method stub
            return null;
        }
        
    }
    
    public IBinder onBind(Intent intent){
        return new ServerImple();
    }

}

 

 

 

服务器端就基本上完成了，但是请记住manifest里面注册service

<service android:name="cx.aidl.ServerService">
            <intent-filter>
                <action android:name="cx.aidl.ServerService" />
            </intent-filter>
</service>

 

------------------------------------------------------------------------------------------

 

接下来就是在客户端调用服务器端了。

 

新建一个项目

 

首先，将服务器端的aidl文件（IServer.aidl）拷贝到客户端，注意：包名和文件名必须一致

 

然后就是调用服务器端了，使用了ServerConnection进行连接。代码如下：

package cx.aildClient;

import cx.aidl.IServer;
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.util.Log;
import android.widget.Toast;

public class AidlClient extends Activity {
    /** Called when the activity is first created. */
    private IServer iServer = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        this.bindService(new Intent("cx.aidl.ServerService"), serverConnection, Context.BIND_AUTO_CREATE);
        Log.d("cx","in onCreate()");
    }
    
    
    private ServiceConnection serverConnection = new ServiceConnection(){

        public void onServiceConnected(ComponentName name, IBinder service) {
            // TODO Auto-generated method stub
            iServer = IServer.Stub.asInterface(service);
            try {
                Toast.makeText(AidlClient.this, iServer.getValueFromServer(), Toast.LENGTH_LONG).show();
             } catch (RemoteException e) {
                // TODO Auto-generated catch block
                Toast.makeText(AidlClient.this, "error!!!!!" , Toast.LENGTH_LONG).show();
             }
        }

        public void onServiceDisconnected(ComponentName name) {
            // TODO Auto-generated method stub
            
        }
        
    };
}