code: private void fetchSystemAttrIds()
              throws IOException, SAXException, ParserConfigurationException {
          String url = "https://android.googlesource.com/platform/frameworks/base/+/master/core/res/res/values/public.xml";
          String html = getUrl(url);
          String xml = retrieveCode(html);
  
          if (xml != null) {
              parseAttributeXml(xml);
          }
      }
docs: from https://android.googlesource.com/platform/frameworks/base/+/master/core/res/res/values/public.xml