I think viewing the details of the crash in the Android logcat might be helpful.
I suppose you could also try commenting out the fioriURL parameter in the appConfig.js file assuming you have set that variable to your Fiori Launchpad. That way you could try it out in demo mode and perhaps that would further help isolate the problem.
Another thing you could try would be to download the Fiori Client from the app store rather than building it yourself.
Regards,
Dan van Leeuwen