Android与服务器通信

1.Http方式

package com.myapp.util;

import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

public class MyUtil {
    public static String doGet(String url){
        HttpGet get=new HttpGet(url);  
        HttpClient client=new DefaultHttpClient();
        String result="";
        try {  
            HttpResponse response=client.execute(get);//执行Post方法
            
            result=EntityUtils.toString(response.getEntity());
        }catch (Exception e) {
            return "";
        }
        return result;
    }
      
    public  String doPost(String url,List<NameValuePair> values){     
        try {  
            HttpEntity httpEntity=new UrlEncodedFormEntity(values,"UTF-8");//使用编码构建Post实体
            HttpPost post=new HttpPost(url);  
            post.setEntity(httpEntity);//设置Post实体   
            HttpClient client=new DefaultHttpClient();  
            HttpResponse  response=client.execute(post);//执行Post方法   
            return EntityUtils.toString(response.getEntity());  
        } catch (Exception e) {
            return "";
        }
    }

}

2.Socket方式

package com.bjdata.myapp.util;

import java.io.*;
import java.net.*;

 public class SocketClient {
    static Socket client;
    
    public SocketClient(String site, int port){
        try{
            client = new Socket(site,port);
            System.out.println("Client is created! site:"+site+" port:"+port);
        }catch (UnknownHostException e){
            e.printStackTrace();
        }catch (IOException e){
            e.printStackTrace();
        }
    }
    
    public String sendMsg(String msg){
        try{
            BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
            PrintWriter out = new PrintWriter(client.getOutputStream());
            out.println(msg);
            out.flush();
            return in.readLine();
        }catch(IOException e){
            e.printStackTrace();
        }
        return "";
    }
    public void closeSocket(){
        try{
            client.close();
        }catch(IOException e){
            e.printStackTrace();
        }
    }

}