Cannot Resolve Symbol AppCompatActivity, Cannot Resolve Symbol ContextCompat

Question

Everything works fine, but in Android Studio showing below errors

the code runs but unable to get suggestions for functions, class etc.

Thanks

Rebuild and clean project , make sure there is no issues in gradle and classes also , xml also — Quick learner, Jun 01 '18 at 07:24
delete files in build and app/build manually and invalidate cache in android studio — nima moradi, Jun 01 '18 at 07:31
you can't invalidate cache manually it done in files ->invalidate caches /restart , but you delete build folder by any file explorer — nima moradi, Jun 01 '18 at 07:37
First, remove all red highlighted imports and again import it manually by using suggestions of Android Studio. — Parth Patel, Jun 02 '18 at 06:28
I have mentioned in the question, It doesn't show me any kind of suggestion. — Amin Pinjari, Jun 04 '18 at 04:24

score 4 · Accepted Answer · answered Jun 08 '18 at 20:37

4

I had the same exact issue as you... upgraded to 3.1.2/3 and turned into a mess.

Try the following approach of deleting the libraries folder from .idea!

answered Jun 08 '18 at 20:37

Montwell

Thanks, it worked for me, but I need to do it for my all projects – Amin Pinjari Jun 09 '18 at 07:43

1 Answers1