“Cannot find symbol R” error after renaming package name

Question

After renaming my project package name (with Refactor), I got this error:

Error:(7, 44) error: cannot find symbol class R

All of my R

Answer 1

In my case, this error showed because I changed the package name without ticking the boxes (Search in comments and strings and Search for text occurrences)

The solution for me: Rename package again and make sure you tick the two boxes as in the photo, then Do Refactor