Kirigami and cross--building Subsurface-mobile

[Willem Ferguson]

Dear Axel and others,

The latest build of Subsurface-mobile builds correctly (I think), 
producing two .apk files, probably due to the latest modifications to 
the mobile build script. The build produces QtApp-debug.apk and 
Qt-debug-unaligned.apk in src/subsurface-mobile-build-arm/bin.

I have two questions:

1) What is the difference between the above two .apk files? 
(QtApp-debug.apk and Qt-debug-unaligned.apk)

2) After transferring the .apk files to my Android device, and selecting 
any of these for installation, Android just informs me "App not 
installed".  Am I doing something wrong?

Kind regards,
willem