基于apache的httpclient发送请求。

由于毕业设计要涉及到互联网的的通讯，所以很快就接触到于远程服务器交互。起初想是和服务器的数据库直接连接，后来找了半天，都没有相关的文档，而且也不安全。故转为通过网页来和数据库交互。

        服务端：php+apache

        user.php

 1 <?php
 2 
 3           $name=$_POST['name'];
 4 
 5           $passwd=$_POST['pwd'];
 6 
 7           if($name=="yecao" && $passwd=="yecao")
 8 
 9          {
10 
11            echo "ok";
12 
13          }else{
14            $getname=$_GET["getname"];
15            $getpwd=$_GET["getpwd"];
16            echo "your name:".$getname."and your pwd:".$getpwd;
17 }
18          ?>

       客户端：android

xml布局代码：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent"
 4     android:layout_height="fill_parent"
 5     android:orientation="vertical" >
 6     <Button 
 7 android:text="POST发送"
 8         android:id="@+id/post"
 9         android:layout_width="fill_parent"
10         android:layout_height="wrap_content"
11 />
12       <Button 
13 android:text="GET发送"
14         android:id="@+id/get"
15         android:layout_width="fill_parent"
16         android:layout_height="wrap_content"
17 />
18     
19     <TextView
20 android:layout_width="fill_parent"
21         android:layout_height="wrap_content"
22         android:text="@string/hello"
23         android:id="@+id/showtext" />
24 
25 </LinearLayout>

界面代码：

  1 package com.loin;
  2 
  3 import java.io.BufferedReader;
  4 import java.io.IOException;
  5 import java.io.InputStream;
  6 import java.io.InputStreamReader;
  7 import java.io.OutputStream;
  8 import java.util.ArrayList;
  9 import java.util.List;
 10 
 11 import org.apache.http.Header;
 12 import org.apache.http.HttpEntity;
 13 import org.apache.http.HttpResponse;
 14 import org.apache.http.NameValuePair;
 15 import org.apache.http.client.ClientProtocolException;
 16 import org.apache.http.client.HttpClient;
 17 import org.apache.http.client.entity.UrlEncodedFormEntity;
 18 import org.apache.http.client.methods.HttpGet;
 19 import org.apache.http.client.methods.HttpPost;
 20 import org.apache.http.impl.client.DefaultHttpClient;
 21 import org.apache.http.message.BasicNameValuePair;
 22 
 23 import android.app.Activity;
 24 import android.os.Bundle;
 25 import android.view.View;
 26 import android.view.Window;
 27 import android.view.View.OnClickListener;
 28 import android.widget.Button;
 29 import android.widget.TextView;
 30 
 31 public class LoginActivity extends Activity {
 32     /** Called when the activity is first created. */
 33     Button postbt,getbt;
 34     TextView tv;
 35     public String url;    
 36     @Override
 37     public void onCreate(Bundle savedInstanceState) {
 38         super.onCreate(savedInstanceState);
 39         requestWindowFeature(Window.FEATURE_NO_TITLE);
 40         setContentView(R.layout.main);
 41         postbt=(Button)findViewById(R.id.post);
 42         getbt=(Button)findViewById(R.id.get);
 43        url ="http://192.168.1.6/usr.php";
 44         tv=(TextView)findViewById(R.id.showtext);
 45         postbt.setOnClickListener(postclick);
 46         getbt.setOnClickListener(getclick);
 47         
 48         
 49     }
 50     //post
 51     private OnClickListener postclick=new OnClickListener() {
 52         
 53         @Override
 54         public void onClick(View v) {
 55             // TODO Auto-generated method stub
 56             
 57             postdata(url,"yecao","yecao");
 58         }
 59     };
 60     //get
 61     private OnClickListener getclick=new OnClickListener() {
 62         
 63         @Override
 64         public void onClick(View v) {
 65             // TODO Auto-generated method stub
 66         getdata(url,"yecao","yecao");
 67         }
 68     };
 69     
 70     //postmethod
 71     private void postdata(String url,String nametext,String pwdtext)
 72     {
 73         try{
 74             HttpClient http=new DefaultHttpClient();
 75             HttpPost post=new HttpPost(url);
 76             List<NameValuePair> pair=new ArrayList<NameValuePair>();
 77             pair.add(new BasicNameValuePair("name", nametext));
 78             pair.add(new BasicNameValuePair("pwd", pwdtext));
 79             post.setEntity(new UrlEncodedFormEntity(pair, "utf-8"));
 80             HttpResponse response=http.execute(post);
 81             HttpEntity ht=response.getEntity();
 82             String result="";
 83             String line="";
 84             if(response.getStatusLine().getStatusCode()==200)
 85             {
 86                 BufferedReader reader=new BufferedReader(new InputStreamReader(ht.getContent()));//以流的方式读取可以避免中文乱码。
 87                 while((line=reader.readLine())!=null)
 88                 {
 89                     result=result+line;
 90                 }
 91                 tv.setText(result);
 92             }
 93         }catch(Exception e){e.printStackTrace();}
 94     }

         //getMethod
 95     private void getdata(String url,String nametext,String pwdtext)
 96     {
 97         HttpClient httpclient=new DefaultHttpClient();
 98         url=url+"?getname="+nametext+"&getpwd="+pwdtext;
 99         HttpGet get=new HttpGet(url);
100         try {
101             HttpResponse response=httpclient.execute(get);
102             HttpEntity entity=response.getEntity();
103             String result="";
104             String line="";
105             if(response.getStatusLine().getStatusCode()==200)
106             {
107                 BufferedReader reader=new BufferedReader(new InputStreamReader(entity.getContent()));
108                 while((line=reader.readLine())!=null)
109                 {
110                     result=result+line;
111                 }
112                 tv.setText(result);
113             }
114         } catch (Exception e) {
115             // TODO Auto-generated catch block
116             e.printStackTrace();
117         }
118    }
121     
122 }

最后还要给配置文件加上访问互联网的权限：

 <uses-permission android:name="android.permission.INTERNET"/>

 

效果图：

  get时候：

        

post的时候：