Android指紋識別動畫（Android's animated fingerprint）庫：Swirl

http://androidren.com/index.php?qa=358&qa_1=android%E6%8C%87%E7%BA%B9%E8%AF%86%E5%88%AB%E5%8A%A8%E7%94%BB%EF%BC%88androids-animated-fingerprint%EF%BC%89%E5%BA%93%EF%BC%9Aswirl

Android's animated fingerprint icon provided in a simple, standalone library.

不多說，看圖你就知道他有多屌。

https://github.com/mattprecious/swirl