Hi. Could you tell, please, what behaviour is expected?

By default, aidl files will be compiled in java and will be part of a jar file in aar. So it is supported alreeady

Also raw aidl files is not a part of aar

as your said，not the compiled part ， just some parcelable class，seem not include in the aar，but in the origin aar，they are included

Here is my example TestAidlGrease.zip

And this is result

@maskerliu, Could you share example project with the problem?