正文  网络通信 > HTTP >

Android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,还不清楚Android的单元测试的同学们请看Android开发技巧总......

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,还不清楚Android的单元测试的同学们请看Android开发技巧总结中的Android单元测试的步骤一文。

java.net包中的HttpURLConnection类

Get方式:

01 // Get方式请求
02 public static void requestByGet() throws Exception {
03     String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
04     // 新建一个URL对象
05     URL url = new URL(path);
06     // 打开一个HttpURLConnection连接
07     HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
08     // 设置连接超时时间
09     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:

01 // Post方式请求
02 public static void requestByPost() throws Throwable {
03     String path = "https://reg.163.com/logins.jsp";
04     // 请求的参数转换为byte数组
05     String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")
06             + "&pwd=" + URLEncoder.encode("android", "UTF-8");
07     byte[] postData = params.getBytes();
08     // 新建一个URL对象
09     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-Type
22     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:

 

01 // HttpGet方式请求
02 public static void requestByHttpGet() throws Exception {
03     String path = "https://reg.163.com/logins.jsp?id=helloworld&pwd=android";
04     // 新建HttpGet对象
05     HttpGet httpGet = new HttpGet(path);
06     // 获取HttpClient对象
07     HttpClient httpClient = new DefaultHttpClient();
08     // 获取HttpResponse实例
09     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:

 
01 // HttpPost方式请求
02 public static void requestByHttpPost() throws Exception {
03     String path = "https://reg.163.com/logins.jsp";
04     // 新建HttpPost对象
05     HttpPost httpPost = new HttpPost(path);
06     // Post参数
07     List<NameValuePair> params = new ArrayList<NameValuePair>();
08     params.add(new BasicNameValuePair("id", "helloworld"));
09     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 }