For Android development, I would highly recommend to use web services or Rest instead of ODBC. But there is a standard JDBC Java documentation (not sure if it will work in Android at all though):
http://docs.intersystems.com/cache20131/csp/docbook/DocBook.UI.Page.cls?KEY=ITECHREF_jdbc
You can also have a look at newer Zen Mobile framework designed specially for iOS/Android Cache development, ask for a copy in WRC