can't resolve AppCompatActivity

Question

After renaming application package name, Android Studio displayed this error can\'t resolve symbol AppCompatActivity

Things I tried: <

Answer 1

If the methods via gradle file / "Invalidate caches" do not work, use this way:

1. Navigate in your project to the .idea folder
2. Just Rename the libraries folder
3. Restart Android Studio. It will recreate the libraries folder and work again.