Awesome

Curved-Fab-Reveal-Example

An animation that reveals a circular animation starting from a fab while the fab is moving with a curved motion.

Based on this concept:

For the curve implementation I get the knowledge of Chet Haase, he wrote and implemented a few years ago an article and a sample about how to implement curved and non curved motion animations on android.

License

This Source Code Form is subject to the terms of the Mozilla Public 
License, v. 2.0. If a copy of the MPL was not distributed with this 
file, You can obtain one at http://mozilla.org/MPL/2.0/.