Android客户端与服务器交互方式（2）

Android客户端与服务器交互方式（2）

上篇文章中提出了json方式的数据交互（http://blog.csdn.net/lijj325/article/details/72847046）这次来写xmlrpc（wordpress for android）。

一个rpc系统，必然包括2个部分：1.rpc client，用来向rpc server调用方法，并接收方法的返回数据；2.rpc server,用于响应rpc client的请求，执行方法，并回送方法执行结果。RPC是Remote Procedure Call的缩写，翻译成中文就是远程过程调用，是一种在本地的机器上调用远端机器上的一个过程（方法）的技术，这个过程也被大家称为“分布式计算”，是为了提高各个分立机器的“互操作性”而发明出来的技术。

那么怎么实现呢？

1.android端

package com.example.androidclient;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class AndroidClientActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.android_client);

Button sendButton = (Button) findViewById(R.id.send_button);
sendButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
new Thread(new Runnable(){
@Override
public void run() {
HttpPost httpRequest = new HttpPost(http://172.16.99.207:8080/AndroidServer/AndroidServerServlet);
List<namevaluepair> params = new ArrayList<namevaluepair>();
params.add(new BasicNameValuePair(clientData, 您好服务器端！));
try {
Message message = new Message();
Bundle bundle = new Bundle();
httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));//设置请求参数项
HttpClient httpClient = new DefaultHttpClient();
HttpResponse httpResponse = httpClient.execute(httpRequest);//执行请求返回响应
if(httpResponse.getStatusLine().getStatusCode() == 200){//判断是否请求成功
bundle.putString(msg, EntityUtils.toString(httpResponse.getEntity()));
}else{
bundle.putString(msg, 没有获取到Android服务器端的响应！);
}
message.setData(bundle);
handler.sendMessage(message);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
});
}

private Handler handler = new Handler(){
@Override
public void handleMessage(Message message) {
super.handleMessage(message);
Bundle bundle = message.getData();
String msg = bundle.getString(msg);
Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();
}
};
}</namevaluepair></namevaluepair>

2.服务器端

package com.ghj.packageofservlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class AndroidServerServlet extends HttpServlet {

private static final long serialVersionUID = 6792396567928634227L;

public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
response.setContentType(text/plain; charset=UTF-8);
request.setCharacterEncoding(UTF-8);
System.err.println(request.getParameter(clientData));
PrintWriter printWriter = response.getWriter();
printWriter.print(您好Android客户端！);
printWriter.flush();
printWriter.close();
}
}

3.xml代码

<!--?xml version=1.0 encoding=UTF-8?-->
<web-app http:="java.sun.com=" javaee="ns=" version="2.5" web-app_2_5.xsd="xml=" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation="http://java.sun.com/xml/ns/javaee"><servlet>
<servlet-name>AndroidServerServlet</servlet-name>
<servlet-class>com.ghj.packageofservlet.AndroidServerServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>AndroidServerServlet</servlet-name>
<url-pattern>/AndroidServerServlet</url-pattern>
</servlet-mapping>
</web-app>

参考1.http://www.cnblogs.com/X-knight/p/5406362.html

2.http://www.2cto.com/kf/201501/370468.html