How to make whatsapp type of animation for opening the menu from toolbar(actionbar)

Question

Description:

1. I recently updated whatsapp and noticed the animation for menu item clicked on toolbar. How to achieve this effect?
2. Are there any opens

Answer 1

This is a link to webpage which shows how to implement it . Hope it helps http://blog.grafixartist.com/circular-reveal-effect-like-whatsapp-in-android/ .