We are aware of this issue, but we cannot remove android.enableJetifier because it is required by one of our third-party dependencies (com.github.barteksc:pdfium-android) which currently lacks a suitable open-source replacement.

Maybe there's a way to Jetify manually the JAR of pdfium-android. This dependency is not maintained anymore, so we could import the JAR directly. Does anybody have experience with that?

https://developer.android.com/tools/jetifier#usage

@Woren Could you test out this PR? Thanks #610

Firstly thank you for the quick reply!

If I understand this correctly I need to clone mentioned branch (PR) and use it directly? So there are no snapshot builds of this branch?

Also for the future release (if this is merged) we will need to still use cloned repo of main branch or it will work with produced *.aar downloaded from maven? If not build times should be likely better that using Jetifier but there will be some overhead still (hopefully mostly elimined using Gradle cache etc.).

You need to clone the branch directly.

But if I understand correctly, removing Jetifier will have an impact if you were using the Readium toolkit and compiling it yourself as a local clone (see our README) instead of using Maven Central. In your case, I'm not sure you will see much difference? Gradle caches jetified artifacts pulled from Maven Central so unless you clear your Gradle cache regularly it should not have much impact.

In any case this will work with Maven Central. If not, we will revert back these changes.

Sorry for little delay. Adding the cloned depedency and syncing project parameters wasn't that straight forward for us.

So in the end it should be working if we didn't mess up something with those dependencies and caches from previous builds. The property "android.enableJetifier" is set to false for our project.

Also in the newly produced jar file of pdfium you can clearly see that "support library" imports are gone and are replaced with "androidx".

In my option this is ready to be merger and thank you for your effort.