It's been 6 months since we released XMLBeans 3.1.1. The reason I suggest naming next version as 3.2.0 is because we have dropped support for Java 6 & 7. https://issues.apache.org/jira/browse/XMLBEANS-542?jql=project%20%3D%20XMLBEANS%20AND%20fixVersion%20%3D%20%22Version%203.1.1%22
A few people on stackoverflow have run into https://issues.apache.org/jira/browse/XMLBEANS-542 (not that that is the only issue with trying to use POI/XMLBeans on Android.
