Android: Could not instantiate converter : com.thoughtworks.xstream.converters.extended.DurationConverter

com.thoughtworks.xstream.InitializationException: Could not instantiate converter : com.thoughtworks.xstream.converters.extended.DurationConverter : null
    at com.thoughtworks.xstream.XStream.registerConverterDynamically(XStream.java:756)
    at com.thoughtworks.xstream.XStream.setupConverters(XStream.java:719)
    at com.thoughtworks.xstream.XStream.<init>(XStream.java:452)
    at com.thoughtworks.xstream.XStream.<init>(XStream.java:377)
    at com.thoughtworks.xstream.XStream.<init>(XStream.java:352)
    at at.digitald.core.CC.initialize(CC.java:79)
    ... 5 more
Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
    at com.thoughtworks.xstream.XStream.registerConverterDynamically(XStream.java:749)
    ... 10 more
Caused by: javax.xml.datatype.DatatypeConfigurationException: Provider org.apache.xerces.jaxp.datatype.DatatypeFactoryImpl not found
    at javax.xml.datatype.DatatypeFactory.newInstance(DatatypeFactory.java:102)
    at com.thoughtworks.xstream.converters.extended.DurationConverter.<init>(DurationConverter.java:33)
    ... 13 more
Caused by: java.lang.ClassNotFoundException: org.apache.xerces.jaxp.datatype.DatatypeFactoryImpl in loader dalvik.system.PathClassLoader[..]
    at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
    at javax.xml.datatype.FactoryFinder.newInstance(FactoryFinder.java:154)
    at javax.xml.datatype.FactoryFinder.find(FactoryFinder.java:241)
    at javax.xml.datatype.DatatypeFactory.newInstance(DatatypeFactory.java:95)
    ... 14 more

public void initialize() {

		if (Gdx.app.getType() != ApplicationType.Android) {
			Xpp3Driver driver = new Xpp3Driver();
			xs = new XStream(driver);
		} else {
			xs = new XStream(new KXml2Driver()); //line 79
		}
 {..}
}