Can't resolve Android databinding class

Question

While using data binding , I am not able to get class MainActivityBinding as per Data Binding Guide

My layout name is activity_main.xml. I

Answer 1

I recently installed android studio 3.5.3 and this issue rised so what i did is.

1) Clean Project
2) Update Gradle (as notification was coming) 
3) Rebuild project

hope this helps.