I use a few Android applications on my XPERIA X under SF 3.3 with Android Support. Recently some apps are no longer avaiable for installation as an APK file but as an XAPK (even if they are for Android 4.4).
Is there any possibility to install via an XAPK file?
An example for such app is e.g.:
Ok I think my contribution was not very helpful neither, I’ve realized too late that XAPK and Split APK are two different things
Then I think you could try the method described in one of Peter’s links:
Using the terminal, unzip your xapk file
Using the file explorer, install the main APK that’s inside.
EDIT: I can confirm that the method above worked with the XAPK of Uber Lite v1.107.