code: private static String decodeUrl(String url) {
          if (url == null) {
              return null;
          }
  
          try {
              return URLDecoder.decode(url, CHARSET_UTF8);
          } catch (UnsupportedEncodingException e) {
              return url;
          }
      }
docs: Decode Url
  
  @param url
  @return decoded url