Android databinding with same layout in different modules

Question

Supposedly I have two android modules

ModuleA
- HelloWorld.Xml
ModuleB
- HelloWorld.Xml

Notice I have same xml layouts in different modules.

Now there will be two item bindings generated that would also be properly kept in their corresponding module

ModuleA
- HelloWorld.Xml
- HelloWorldItemBinding.java
ModuleB
- HelloWorld.Xml
- HelloWorldItemBinding.java

This compiles however when we land on ModuleB's HelloWorld.xml we get an error with the following

Cannot cast ModuleA.HelloWorldItemBinding to ModuleB.HelloWorldItemBinding.

I understand that this is because the project's modules are actually merged at compile time , however I still dont understand that when two binding files are actually created already at build time , why does android have an issue with finding the right one ?.

Also I couldn't find any link on this subject about databindings in multiple modules caveats at the official documentation

Answer 1

By default, a binding class is generated based on the name of the layout file but you can set custom binding class name or full package name to avoid conflict.

ModuleA

<data class="HelloWorldModuleA">
…
</data>

ModuleB

<data class="HelloWorldModuleB">
…
</data>

here is official info