Android Studio Can't resolve fragmentActivity and ViewPager imports

Question

I follow the tutorial of developing swipe-able tabs. When I import:

import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;         


        

Answer 1

1. Click on File, then select Project Structure
2. Choose Modules "app"
3. Click "Dependencies" tab
4. Click on the + sign, choose Library Dependencies
5. Select support-v4 or other libraries as needed
6. OK