I spent days on trying to make this extension work!
I have a Unity vuforia project that I'd like to add custom layout/buttons and classes to show up information about the 3d models in the app.
Referring to the following tutorial; https://developer.vuforia.com/resources/dev-guide/extending-unity-android-activity-and-adding-custom-views-eclipse
In step 10; I don't have the "Editor" folder under my Unity installation "I'm using Mac"
I tried to reinstall Unity to see if I'll find the Editor folder but there I can't find it.
I believe classes.jar in the editor folder is the key sulotion in my case.