How to make animation in android?

Question

Android

Good day. Please tell me how to make such animations in android
https://cloud.mail.ru/public/5aJ6/yjc7YhTmi

Answer 1

The easiest way I think is to make it custom View: Draw several circles on the canvas, let's say with radii a, b is not a problem, but in the method where the animation will start, just change this radius using Property animations and do invalidate();