Android Studio and android.support.v4.app.Fragment: cannot resolve symbol

Question

I am tryng out Android Studio instead of Eclipse. I install it and then start a completely new project and follow the wizard. I add no code of my own.

Then, I right-

Answer 1

replace this line of code

import android.support.v4.app.FragmentActivity;

with

import androidx.fragment.app.FragmentActivity;

and you are done.