XmlToJson is an Android Studio Library which converts XML to JSON and JSON to XML.
It is fully configurable and easy to integrate with gradle.
XStream is a simple library to serialize objects to XML and back again.
VTD-XML is the next generation XML parser / indexer/ editor / slicer / assembler / xpath-engine that goes beyond DOM, SAX and PULL in performance, memory usage, and ease of use.
Woodstox is a high-performance validating namespace-aware StAX-compliant (JSR-173) Open Source XML-processor written in Java.
A simple XML parser based upon Android sax parser but written in pure Java. SEXP gives callbacks for all parsing events and being written in pure java allows faster and more comprehensive testability.
Simple is a high performance XML serialization and configuration framework for Java. Its goal is to provide an XML framework that enables rapid development of XML configuration and communication systems. This framework aids the development of XML systems with minimal effort and reduced errors.
kXML2 (or a compatible XML pull parser) should be available on all Android devices.
JDOM is an open source Java-based document object model for XML that was designed specifically for the Java platform so that it can take advantage of its language features. JDOM integrates with Document Object Model (DOM) and Simple API for XML (SAX), supports XPath and XSLT.