Android Support Library v7 R.id. Error

Question

I have added the support library v7 to my project and I think it worked because ActionBarActivity is recognized (import android.support.v7.app.ActionBarActivity works). The problem is that for all my R.ids the R is underlined with the message R cannot be resolved to a variable.

What am I doing wrong?

Answer 1

The problem is probably with R, not anything to do with the support library. Sometimes cleaning the project solves the problem.

A Google search with that message ("R cannot be resolved to a variable") returns tons of answers, try those. Also Stackoverflow is full of these:

• "R cannot be resolved to a variable"?
• Eclipse error: R cannot be resolved to a variable
• Eclipse giving error, missing R.java file after recent update

If it's got nothing to do with that, then maybe you've got an error in some XML file.