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

Update all your library versions to 26.1.0 (to the most recent version) and also add:

compile 'com.android.support:support-v4:26.1.0'

if you are using Android Studio 3.0.0 and above then use

implementation 'com.android.support:support-v4:26.1.0'

Sync your project and the error will automatically resolve because ?attr/actionBarSize is part of v4 library.