Android - DataBinding - How and when the Binding classes will be generated?

Question

DataBinding Guide States

  By default, a Binding class will be generated based on the name of the layout 
file, converting it to Pascal case and suffixing “Bindi         


        

Answer 1

A weird "bug" in android-studio causes the generated BR.java file not to use the @Bindable fields and still only have the _all property if a res/layout directory doesn't exist.

It happened to me when I wanted to create a "No Activity" App to have a library that contained my different bindable data.