String name = usuario.getText().toString();
            //String password = contrasenia.getText().toString();
            
            ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
            nameValuePairs.add(new BasicNameValuePair("tag","usersave"));
            nameValuePairs.add(new BasicNameValuePair("username", name));
            nameValuePairs.add(new BasicNameValuePair("gcmcode", "54d"));

            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http://127.0.0.1:81/AgendaUCA/index.php");
			try {
				httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
                ResponseHandler<String> responseHandler = new BasicResponseHandler();
			    String res = httpclient.execute(httppost, responseHandler);

			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}