XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
factory.setValidating(false);
//parse root element
XmlPullParser parser = factory.newPullParser();
//parser.setInput(input, "UTF-8");
parser.setInput(input);
parser.nextTag();
String namespace = (parser.getNamespace() != null) ? parser.getNamespace() : "";