Cannot resolve symbol '?attr/actionBarSize' after updating Android Studio from 2.3 to 3.0 for buildToolsVersion '26.0.2'

Question

After updating Android Studio from 2.3 to 3.0 I changed buildToolsVersion from 26.0.0 to 26.0.2 and after then I am getting this error:

Cannot reso         


        

Answer 1

please replace android support libraries.

from

27.1.1

to

28.0.0-alpha3

and replace 27 to 28 for following cases:

compileSdkVersion 28
buildToolsVersion "28.0.0"
targetSdkVersion 28

this will fix the issue.