使用HttpClient：

NameValuePair nameValuePair1 = new BasicNameValuePair('name', 'yang');
NameValuePair nameValuePair2 = new BasicNameValuePair('pwd','123123');
List nameValuePairs = new ArrayList();
nameValuePairs.add(nameValuePair1);
nameValuePairs.add(nameValuePair2);
String validateURL = 'http://10.0.2.2:8080/testhttp1/TestServlet';

try {

        HttpParams httpParams = new BasicHttpParams();

        HttpConnectionParams.setConnectionTimeout(httpParams,5000); //设置连接超时为5秒

        HttpClient client = new DefaultHttpClient(httpParams); // 生成一个http客户端发送请求对象

        HttpPost httpPost = new HttpPost(urlString); //设定请求方式