iso8583 Message Pack & Unpack lib for Java. Works well with Android too.
Supports: -> Tertiary Bitmap -> Subfields
ISO 8583 Financial transaction card originated messages — Interchange message specifications is the International Organization for Standardization standard for systems that exchange electronic transactions made by cardholders using payment cards.
Check out http://en.wikipedia.org/wiki/ISO_8583 for more information.