Error : Ambiguous method call. Both findViewById (int) in AppCompactActivity and Activity

Question

I am getting the error: \"Ambiguous method call\" on initializing Toolbar using Android Studio 3.0 RC1. I have extended my Activity with AppCompatActivity and compiling my appli

Answer 1

I have recently upgraded to build tools version 27.0.2 and faced the same problem. But noticed that I had the compileSdk version set to 25. Changing compileSdk to 27 resolved the issue.