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

Question

I am trying 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-click to create a new component, a new Fragment:

and choose a new fragment:

and as soon as I do, I see compile errors:

... so I start googling and find out that I need to install and reference support library 4, and that I do. When I check the build.gradle (whatever that is, new to me coming from Eclipse), I see:

but I change that to

because they said so here. After recompiling and all that, the error is still there. I then reference the .jar-file directly, like this:

and again do recompile etc, but that doesn't help either.

This behaviour seems very strange to me. What am I missing here? This is the SDK Manager view:

Answer 1

DID NOT WORK:

I have already had the following dependency in my build.gradle

implementation 'com.android.support:support-v13:26.0.2' 

I have tried all of the following,

• Invalidate Caches/Restart
• Sync project with gradle files
• Clean project
• Rebuild project
• gradlew clean

But, none of them worked for me.

SOLUTION:

Finally, I solved it by deleting "/.idea/libraries", and then synced with gradle and built again.