Android: NameValuePair usage

Let's talk about the usage of NameValuePair in Android. A list is
defined . The data type of the list is NameValuePair (simple name value pair node type). This code is used in many places in Java to send Post requests like url. Use this list to store parameters when sending post requests.
The general process of sending a request is as follows:

String url="http://www.baidu.com";

HttpPost httppost=new HttpPost(url); //Create HttpPost object

List<NameValuePair> params=new ArrayList<NameValuePair>();
//Create a NameValuePair array to store the parameters to be

sent params.add(new BasicNameValuePair("pwd","2544"));
//Add parameters

httppost.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
//Set encoding

HttpResponse response=new DefaultHttpClient().execute(httppost);
//Send Post and return an HttpResponse object