Q:

Can't resolve resources

A few days ago I built an interface for an application I wanted to build and everything was fine, no errors. Today I re-opened the project (with the only difference being that I moved the project's physical location on my computer) and suddenly I'm getting a whack of errors, the first of which seems to be:
"Couldn't resolve resource @dimen/activity_horizontal_margin
The project isn't recognizing any of the resources under 'dimens' or 'strings' resources.
I don't know that there is relevant code to post because as far as I can tell nothing actually caused these errors.
I've read a few answers that suggest cleaning, refreshing, and rebuilding the project. I've cleaned (don't see a refresh option) and rebuilt, but nothing.
What is going on?

A:

The issue actually was that I moved the original project into a different folder. Apparently creating the project in a certain location created a bunch of dependencies on it being in that location. Afterwards, after moving the folder back into its original location, I also ran into issues by cloning the project with a different exterior folder name. 

