Trouble referencing Facebook library in app

I'm following the tutorial here to use the Facebook API in my app. I've pull the library from the git repo and now I'm trying to reference it in my app. However, I can't seem to select the library. Does it have to be located in a certain directory relative to my project? Right now, my project and开发者_开发问答 the library are at the same directory level.

According to the tutorial you gave, you first need to create a project from the source, of the facebook library downloaded from git and only then to add it as library, otherwise it won't work.