I\'ve been trying this all evening to no avail so I\'m going to list my exact steps starting from scratch.
I use intellij idea, so it's not exactly your case, but maybe it will be helpfull. I struggled with setting this up whole day, then it suddenly worked. I'll describe my setup so you can compare:
android-support-v13.jar and android-support-v7-gridlayout.jar. NOTE: I used the v7 support library in the main project, not the library project. In fact, checking it now - in library project I don't reference the v7 support. instead of xmlns:grid="http://schemas.android.com/apk/res-auto" in your layout file to use custom attributes defined in the library project in your tag, like grid:columnCounthope this helps. I'm currently trying it, not even sure it is something I need :)