XML : androd- protocol not found - xml

I've parsing a xml string to this code, but I get "Protocol not found" in the log . this is the code :

  DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();                  DocumentBuilder builder = factory.newDocumentBuilder();                  Document doc = builder.parse(datas);                    NodeList nodes = doc.getElementsByTagName("data");                  for (int i = 0; i < nodes.getLength(); i++) {                      Element element = (Element) nodes.item(i);                      NodeList title = element.getElementsByTagName("content");                      Element lines = (Element) title.item(0);                  }    

I parse variable datas to my builder , the variable value is :

  <values>    

3 2 1

very simple ,How can I solve this problem ? what does this error says and how can I fix it ?