I’ve met Google Play restriction while uploading test version recently. The new release page prohibits to upload app bundle targeted to SDK below 31.
I’m using FBReader Android application to read books on the phone. It has a feature to connect to the OPDS catalog and to download books from the reader.
I’ve set up the android build environment on my home desktop. It requires the sign certificate to be generated by Google Play console (using Setup/App integr...