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 @Override 102 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 try 117 { 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TextView 141 * @param response 142 */ 143 private void showResponseResult(HttpResponse response) 144 { 145 if (null == response) 146 { 147 return; 148 } 149 150 HttpEntity httpEntity = response.getEntity(); 151 try 152 { 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" > <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；
