Android与服务器http连接模块代码

 package com.example.httpdemo2;

 import java.io.BufferedReader;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.InputStreamReader;

 import java.io.UnsupportedEncodingException;

 import java.util.ArrayList;

 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.message.BasicNameValuePair;

 import android.os.Bundle;

 import android.app.Activity;

 import android.util.Log;

 import android.view.Menu;

 import android.view.View;

 import android.view.View.OnClickListener;

 import android.widget.Button;

 import android.widget.EditText;

 import android.widget.TextView;

 public class HttpDemo2Activity extends Activity

 {

     private String TAG = "http";

     private EditText mNameText = null;

     private EditText mAgeText = null;

     private Button getButton = null;

     private Button postButton = null;

     private TextView mResult = null;

     // 基本地址：服务器ip地址：端口号/Web项目逻辑地址+目标页面（Servlet）的url-pattern

     private String baseURL = "http://192.168.11.6:8080/HelloWeb/servlet/WelcomeUserServlet";

     @Override

     protected void onCreate(Bundle savedInstanceState)

     {

         Log.i(TAG, "onCreate");

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_http_demo2);

         mNameText = (EditText) findViewById(R.id.name);

         mAgeText = (EditText) findViewById(R.id.age);

         mResult = (TextView) findViewById(R.id.result);

         getButton = (Button) findViewById(R.id.submit_get);

         getButton.setOnClickListener(mGetClickListener);

         postButton = (Button) findViewById(R.id.submit_post);

         postButton.setOnClickListener(mPostClickListener);

     }

     private OnClickListener mGetClickListener = new View.OnClickListener()

     {

         @Override

         public void onClick(View v)

         {

             Log.i(TAG, "GET request");

             // 先获取用户名和年龄

             String name = mNameText.getText().toString();

             String age = mAgeText.getText().toString();

             // 使用GET方法发送请求,需要把参数加在URL后面，用？连接，参数之间用&分隔

             String url = baseURL + "?username=" + name + "&age=" + age;

             // 生成请求对象

             HttpGet httpGet = new HttpGet(url);

             HttpClient httpClient = new DefaultHttpClient();

             // 发送请求

             try

             {

                 HttpResponse response = httpClient.execute(httpGet);

                 // 显示响应

                 showResponseResult(response);// 一个私有方法，将响应结果显示出来

             }

             catch (Exception e)

             {

                 e.printStackTrace();

             }

         }

     };

     private OnClickListener mPostClickListener = new View.OnClickListener()

     {

         @Override

         public void onClick(View v)

         {

             Log.i(TAG, "POST request");

             // 先获取用户名和年龄

             String name = mNameText.getText().toString();

             String age = mAgeText.getText().toString();

             NameValuePair pair1 = new BasicNameValuePair("username", name);

             NameValuePair pair2 = new BasicNameValuePair("age", age);

             List<NameValuePair> pairList = new ArrayList<NameValuePair>();

             pairList.add(pair1);

             pairList.add(pair2);

             try

             {

                 HttpEntity requestHttpEntity = new UrlEncodedFormEntity(

                         pairList);

                 // URL使用基本URL即可，其中不需要加参数

                 HttpPost httpPost = new HttpPost(baseURL);

                 // 将请求体内容加入请求中

                 httpPost.setEntity(requestHttpEntity);

                 // 需要客户端对象来发送请求

                 HttpClient httpClient = new DefaultHttpClient();

                 // 发送请求

                 HttpResponse response = httpClient.execute(httpPost);

                 // 显示响应

                 showResponseResult(response);

             }

             catch (Exception e)

             {

                 e.printStackTrace();

             }

         }

     };

     /**

      * 显示响应结果到命令行和TextView

      * @param response

      */

     private void showResponseResult(HttpResponse response)

     {

         if (null == response)

         {

             return;

         }

         HttpEntity httpEntity = response.getEntity();

         try

         {

             InputStream inputStream = httpEntity.getContent();

             BufferedReader reader = new BufferedReader(new InputStreamReader(

                     inputStream));

             String result = "";

             String line = "";

             while (null != (line = reader.readLine()))

             {

                 result += line;

             }

             System.out.println(result);

             mResult.setText("Response Content from server: " + result);

         }

         catch (Exception e)

         {

             e.printStackTrace();

         }

     }

 }

布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical" >

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Username:" />

<EditText

android:id="@+id/name"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:inputType="text" />

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="User Age:" />

<EditText

android:id="@+id/age"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:inputType="number" />

<Button

android:id="@+id/submit_get"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Submit using GET" />

<Button

android:id="@+id/submit_post"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Submit using POST" />

<TextView

android:id="@+id/result"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:textColor="#0000FF"

android:textSize="14sp" >

</TextView>

</LinearLayout>

须在androidMenifest中配置联网权限；