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:
// Get方式请求 public static void requestByGet() throws Exception {String path = "http://www.jb51.net/logins.jsp?id=helloworld&pwd=android";// 新建一个URL对象URL url = new URL(path);// 打开一个HttpURLConnection连接HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();// 设置连接超时时间urlConn.setConnectTimeout(5 * 1000);// 开始连接urlConn.connect();// 判断请求是否成功if (urlConn.getResponseCode() == HTTP_200) { // 获取返回的数据 byte[] data = readStream(urlConn.getInputStream()); Log.i(TAG_GET, "Get方式请求成功,返回数据如下:"); Log.i(TAG_GET, new String(data, "UTF-8"));} else { Log.i(TAG_GET, "Get方式请求失败");}// 关闭连接urlConn.disconnect(); }
Post方式:
// Post方式请求 public static void requestByPost() throws Throwable {String path = "http://www.jb51.net/logins.jsp";// 请求的参数转换为byte数组String params = "id=" + URLEncoder.encode("helloworld", "UTF-8")+ "&pwd=" + URLEncoder.encode("android", "UTF-8");byte[] postData = params.getBytes();// 新建一个URL对象URL url = new URL(path);// 打开一个HttpURLConnection连接HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();// 设置连接超时时间urlConn.setConnectTimeout(5 * 1000);// Post请求必须设置允许输出urlConn.setDoOutput(true);// Post请求不能使用缓存urlConn.setUseCaches(false);// 设置为Post请求urlConn.setRequestMethod("POST");urlConn.setInstanceFollowRedirects(true);// 配置请求Content-TypeurlConn.setRequestProperty("Content-Type","application/x-www-form-urlencode");// 开始连接urlConn.connect();// 发送请求参数DataOutputStream dos = new DataOutputStream(urlConn.getOutputStream());dos.write(postData);dos.flush();dos.close();// 判断请求是否成功if (urlConn.getResponseCode() == HTTP_200) { // 获取返回的数据 byte[] data = readStream(urlConn.getInputStream()); Log.i(TAG_POST, "Post请求方式成功,返回数据如下:"); Log.i(TAG_POST, new String(data, "UTF-8"));} else { Log.i(TAG_POST, "Post方式请求失败");} }
org.apache.http包中的HttpGet和HttpPost类
Get方式:
// HttpGet方式请求 public static void requestByHttpGet() throws Exception {String path = "http://www.jb51.net/logins.jsp?id=helloworld&pwd=android";// 新建HttpGet对象HttpGet httpGet = new HttpGet(path);// 获取HttpClient对象HttpClient httpClient = new DefaultHttpClient();// 获取HttpResponse实例HttpResponse httpResp = httpClient.execute(httpGet);// 判断是够请求成功if (httpResp.getStatusLine().getStatusCode() == HTTP_200) { // 获取返回的数据 String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8"); Log.i(TAG_HTTPGET, "HttpGet方式请求成功,返回数据如下:"); Log.i(TAG_HTTPGET, result);} else { Log.i(TAG_HTTPGET, "HttpGet方式请求失败");} }
Post方式:
// HttpPost方式请求 public static void requestByHttpPost() throws Exception {String path = "http://www.jb51.net/";// 新建HttpPost对象HttpPost httpPost = new HttpPost(path);// Post参数List<NameValuePair> params = new ArrayList<NameValuePair>();params.add(new BasicNameValuePair("id", "helloworld"));params.add(new BasicNameValuePair("pwd", "android"));// 设置字符集HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);// 设置参数实体httpPost.setEntity(entity);// 获取HttpClient对象HttpClient httpClient = new DefaultHttpClient();// 获取HttpResponse实例HttpResponse httpResp = httpClient.execute(httpPost);// 判断是够请求成功if (httpResp.getStatusLine().getStatusCode() == HTTP_200) { // 获取返回的数据 String result = EntityUtils.toString(httpResp.getEntity(), "UTF-8"); Log.i(TAG_HTTPGET, "HttpPost方式请求成功,返回数据如下:"); Log.i(TAG_HTTPGET, result);} else { Log.i(TAG_HTTPGET, "HttpPost方式请求失败");} }
以上是一些部分代码,测试的时候在测试类中运行对应的测试方法即可。完整代码点这里下载:源码下载
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