The animated icon will enhance user interaction with the app. Unluckily, the built-in Flutter AnimatedIcon class is too limited.
Thanks to animate_icons package, it animates any two icons you preferred.
A picture is worth a thousand words:-
If you are interested to reuse the source code of the screen, please check out the animated_icons branch of the git repository hosted at https://github.com/limcheekin/fluwix. Feel free to fork the repository and send me pull request.
I'd love to hear from you. :)