Android与服务器http连接模块代码

  1 package com.example.httpdemo2;  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.UnsupportedEncodingException;  8 import java.util.ArrayList;  9 import java.util.List; 10  11 import org.apache.http.HttpEntity; 12 import org.apache.http.HttpResponse; 13 import org.apache.http.NameValuePair; 14 import org.apache.http.client.HttpClient; 15 import org.apache.http.client.entity.UrlEncodedFormEntity; 16 import org.apache.http.client.methods.HttpGet; 17 import org.apache.http.client.methods.HttpPost; 18 import org.apache.http.impl.client.DefaultHttpClient; 19 import org.apache.http.message.BasicNameValuePair; 20  21 import android.os.Bundle; 22 import android.app.Activity; 23 import android.util.Log; 24 import android.view.Menu; 25 import android.view.View; 26 import android.view.View.OnClickListener; 27 import android.widget.Button; 28 import android.widget.EditText; 29 import android.widget.TextView; 30  31 public class HttpDemo2Activity extends Activity 32 { 33     private String TAG = "http"; 34     private EditText mNameText = null; 35     private EditText mAgeText = null; 36  37     private Button getButton = null; 38     private Button postButton = null; 39  40     private TextView mResult = null; 41  42     // 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 43     private String baseURL = "http://192.168.11.6:8080/HelloWeb/servlet/WelcomeUserServlet"; 44  45     @Override 46     protected void onCreate(Bundle savedInstanceState) 47     { 48         Log.i(TAG, "onCreate"); 49         super.onCreate(savedInstanceState); 50         setContentView(R.layout.activity_http_demo2); 51  52         mNameText = (EditText) findViewById(R.id.name); 53         mAgeText = (EditText) findViewById(R.id.age); 54         mResult = (TextView) findViewById(R.id.result); 55  56         getButton = (Button) findViewById(R.id.submit_get); 57         getButton.setOnClickListener(mGetClickListener); 58         postButton = (Button) findViewById(R.id.submit_post); 59         postButton.setOnClickListener(mPostClickListener); 60     } 61  62     private OnClickListener mGetClickListener = new View.OnClickListener() 63     { 64  65         @Override 66         public void onClick(View v) 67         { 68             Log.i(TAG, "GET request"); 69             // 先获取用户名和年龄 70             String name = mNameText.getText().toString(); 71             String age = mAgeText.getText().toString(); 72  73             // 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 74             String url = baseURL + "?username=" + name + "&age=" + age; 75  76             // 生成请求对象 77             HttpGet httpGet = new HttpGet(url); 78             HttpClient httpClient = new DefaultHttpClient(); 79  80             // 发送请求 81             try 82             { 83  84                 HttpResponse response = httpClient.execute(httpGet); 85  86                 // 显示响应 87                 showResponseResult(response);// 一个私有方法，将响应结果显示出来 88  89             } 90             catch (Exception e) 91             { 92                 e.printStackTrace(); 93             } 94  95         } 96     }; 97  98     private OnClickListener mPostClickListener = new View.OnClickListener() 99     {100 101         @Override102         public void onClick(View v)103         {104             Log.i(TAG, "POST request");105             // 先获取用户名和年龄106             String name = mNameText.getText().toString();107             String age = mAgeText.getText().toString();108 109             NameValuePair pair1 = new BasicNameValuePair("username", name);110             NameValuePair pair2 = new BasicNameValuePair("age", age);111 112             List<NameValuePair> pairList = new ArrayList<NameValuePair>();113             pairList.add(pair1);114             pairList.add(pair2);115 116             try117             {118                 HttpEntity requestHttpEntity = new UrlEncodedFormEntity(119                         pairList);120                 // URL使用基本URL即可，其中不需要加参数121                 HttpPost httpPost = new HttpPost(baseURL);122                 // 将请求体内容加入请求中123                 httpPost.setEntity(requestHttpEntity);124                 // 需要客户端对象来发送请求125                 HttpClient httpClient = new DefaultHttpClient();126                 // 发送请求127                 HttpResponse response = httpClient.execute(httpPost);128                 // 显示响应129                 showResponseResult(response);130             }131             catch (Exception e)132             {133                 e.printStackTrace();134             }135 136         }137     };138 139     /**140      * 显示响应结果到命令行和TextView141      * @param response142      */143     private void showResponseResult(HttpResponse response)144     {145         if (null == response)146         {147             return;148         }149 150         HttpEntity httpEntity = response.getEntity();151         try152         {153             InputStream inputStream = httpEntity.getContent();154             BufferedReader reader = new BufferedReader(new InputStreamReader(155                     inputStream));156             String result = "";157             String line = "";158             while (null != (line = reader.readLine()))159             {160                 result += line;161 162             }163 164             System.out.println(result);165             mResult.setText("Response Content from server: " + result);166         }167         catch (Exception e)168         {169             e.printStackTrace();170         }171 172     }173 174 }

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" ><TextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="Username:" /><EditTextandroid:id="@+id/name"android:layout_width="match_parent"android:layout_height="wrap_content"android:inputType="text" /><TextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="User Age:" /><EditTextandroid:id="@+id/age"android:layout_width="match_parent"android:layout_height="wrap_content"android:inputType="number" /><Buttonandroid:id="@+id/submit_get"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="Submit using GET" /><Buttonandroid:id="@+id/submit_post"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="Submit using POST" /><TextViewandroid: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；

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