Android(安卓)Aidl实现进程间通信

aidl英文全写：Android inteface define language，

下面是一个简单的例子通过aidl实现进程间通信

1.创建一个服务端工程，包名为com.test.service

在源文件下创建一个IMyservice.aidl文件，在eclipse开环境下会自动生成IMyservice.java.

package com.test.service;
interface ImyServiceManager{

String callBack();
void setMessage(String str);
}

2.编写一个aidl 的服务类，具体如下

package com.test.service;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import android.widget.Toast;

public class MyServiceManager extends Service {

@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return new MyServiceManagerImpl();
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
Log.i("debug", "service create-------------");
super.onCreate();
}

//实现接口定义
public class MyServiceManagerImpl extends ImyServiceManager.Stub{

@Override
public String callBack() throws RemoteException {
// TODO Auto-generated method stub
String str="this message from service";
return str;
}

@Override
public void setMessage(String str) throws RemoteException {
// TODO Auto-generated method stub
Log.i("debug", "this isfrom client msg"+str);
}

}

}

2.创建客户端调用

新建一个工程，包名com.test.client

把服务端下的gen目录下的包复制到客户端src目录下。创建一个Activity调用服务端

package com.test.client;

import com.test.ImyServiceManager;

import android.app.Activity;
import android.app.Service;
import android.content.ComponentName;
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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class AidlClientActivity extends Activity {
/** Called when the activity is first created. */
ImyServiceManager service;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
bindService(new Intent("com.test.myservicemanager"), connection, BIND_AUTO_CREATE);//绑定服务端

Button but=(Button)findViewById(R.id.button1);
but.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
try {
Toast.makeText(getApplicationContext(), service.callBack(), Toast.LENGTH_LONG).show();
service.setMessage("客户端调用");
} catch (RemoteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
});

}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
}
private ServiceConnection connection=new ServiceConnection() {

@Override
public void onServiceDisconnected(ComponentName arg0) {
// TODO Auto-generated method stub
Log.i("debug", "-------disconnected--------");

}

@Override
public void onServiceConnected(ComponentName arg0, IBinder binder) {
// TODO Auto-generated method stub
Log.i("debug", "-------connected--------");
service=ImyServiceManager.Stub.asInterface(binder);
}
};
}

至此两个进程客户端与服务端即可完成通讯，注意，客户端调用之前，服务端服务必须已经在系统中注册过

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