Android中的几种网络请求方式详解

Android应用经常会和服务器端交互，这就需要手机客户端发送网络请求，下面介绍四种常用网络请求方式，我这边是通过Android单元测试来完成这四种方法的

java.net包中的HttpURLConnection类

Get方式：

 1 // Get方式请求 2 public static void requestByGet() throws Exception { 3     String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android"; 4     // 新建一个URL对象 5     URL url = new URL(path); 6     // 打开一个HttpURLConnection连接 7     HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); 8     // 设置连接超时时间 9     urlConn.setConnectTimeout(5 * 1000);10     // 开始连接11     urlConn.connect();12     // 判断请求是否成功13     if (urlConn.getResponseCode() == HTTP_200) {14         // 获取返回的数据15         byte[] data = readStream(urlConn.getInputStream());16         Log.i(TAG_GET, "Get方式请求成功，返回数据如下：");17         Log.i(TAG_GET, new String(data, "UTF-8"));18     } else {19         Log.i(TAG_GET, "Get方式请求失败");20     }21     // 关闭连接22     urlConn.disconnect();23 }

Post方式：

 1 // Post方式请求 2 public static void requestByPost() throws Throwable { 3     String path = "https://reg.163.com/logins.jsp"; 4     // 请求的参数转换为byte数组 5     String params = "id=" + URLEncoder.encode("helloworld", "UTF-8") 6             + "&pwd=" + URLEncoder.encode("android", "UTF-8"); 7     byte[] postData = params.getBytes(); 8     // 新建一个URL对象 9     URL url = new URL(path);10     // 打开一个HttpURLConnection连接11     HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();12     // 设置连接超时时间13     urlConn.setConnectTimeout(5 * 1000);14     // Post请求必须设置允许输出15     urlConn.setDoOutput(true);16     // Post请求不能使用缓存17     urlConn.setUseCaches(false);18     // 设置为Post请求19     urlConn.setRequestMethod("POST");20     urlConn.setInstanceFollowRedirects(true);21     // 配置请求Content-Type22     urlConn.setRequestProperty("Content-Type",23             "application/x-www-form-urlencode");24     // 开始连接25     urlConn.connect();26     // 发送请求参数27     DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream());28     dos.write(postData);29     dos.flush();30     dos.close();31     // 判断请求是否成功32     if (urlConn.getResponseCode() == HTTP_200) {33         // 获取返回的数据34         byte[] data = readStream(urlConn.getInputStream());35         Log.i(TAG_POST, "Post请求方式成功，返回数据如下：");36         Log.i(TAG_POST, new String(data, "UTF-8"));37     } else {38         Log.i(TAG_POST, "Post方式请求失败");39     }40 }

org.apache.http包中的HttpGet和HttpPost类

Get方式：

 1 // HttpGet方式请求 2 public static void requestByHttpGet() throws Exception { 3     String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android"; 4     // 新建HttpGet对象 5     HttpGet httpGet = new HttpGet(path); 6     // 获取HttpClient对象 7     HttpClient httpClient = new DefaultHttpClient(); 8     // 获取HttpResponse实例 9     HttpResponse httpResp = httpClient.execute(httpGet);10     // 判断是够请求成功11     if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {12         // 获取返回的数据13         String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");14         Log.i(TAG_HTTPGET, "HttpGet方式请求成功，返回数据如下：");15         Log.i(TAG_HTTPGET, result);16     } else {17         Log.i(TAG_HTTPGET, "HttpGet方式请求失败");18     }19 }

Post方式：

 1 // HttpPost方式请求 2 public static void requestByHttpPost() throws Exception { 3     String path = "https://reg.163.com/logins.jsp"; 4     // 新建HttpPost对象 5     HttpPost httpPost = new HttpPost(path); 6     // Post参数 7     List<NameValuePair> params = new ArrayList<NameValuePair>(); 8     params.add(new BasicNameValuePair("id", "helloworld")); 9     params.add(new BasicNameValuePair("pwd", "android"));10     // 设置字符集11     HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);12     // 设置参数实体13     httpPost.setEntity(entity);14     // 获取HttpClient对象15     HttpClient httpClient = new DefaultHttpClient();16     // 获取HttpResponse实例17     HttpResponse httpResp = httpClient.execute(httpPost);18     // 判断是够请求成功19     if (httpResp.getStatusLine().getStatusCode() == HTTP_200) {20         // 获取返回的数据21         String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8");22         Log.i(TAG_HTTPGET, "HttpPost方式请求成功，返回数据如下：");23         Log.i(TAG_HTTPGET, result);24     } else {25         Log.i(TAG_HTTPGET, "HttpPost方式请求失败");26     }27 }

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