The wikitudesdk.aar file is inside the Library file. However, I would recommend that you start working with Android studio and follow the instructions on how to set it up here and not eclipse.
over 6 years ago
I want to use eclipse to develop an AR application in Android using Eclipse. According to the documentation, it requires to copy wikitudesdk.jar to the libs folder. But I cannot find it in Wikitude SDK version 5.2.0. Where can I get wikitudesdk.jar file? Thank you.