You’ll need to tell us how you build libmypaint for Andoid so one of us can reproduce the issue. @briend is also familiar with libmypaint so he might be able to point you in the right direction.
Also just because krita uses qt doesn’t mean the tools to compile libmypaint changed all that much so you’ll need to do some research on that end as well. libmypaint is written in C so binding it to qt probably wasn’t that all that trivial to them. With that said if you do start a conversation on the Krita fourms, be sure to link back to here so we can follow along as well.
