Just noticed that
pktriggercord now has
an Android version (experimental), to supplement its support for Mageia 2 (64 bit), ALT Linux, Raspbian and Windows.
I guess this may be worth watching if you need Android support and want to tether Pentax cameras that don't work with the Flucard (or aren't K-S2's, with WiFi built-in and custom Pentax remote support apps available).
pktriggercord itself is now well established and reasonably reliable. I don't have a smartphone or anything Android so can't test this Android port. Just FYI.