B4J Question Convert B4A project to B4J project

Separate the project into stuff that doesn't need UI interaction (best expressed as classes) and stuff that needs UI interaction. Compile the stuff that doesn't need UI interaction as a library, then implement the stuff that does in B4A and in B4J

You can try this: https://www.b4x.com/android/forum/threads/bal2bjl.77293/

to convert your layouts, I can't guarantee the results, but give it a try.