I wanted to implement a widget similar to the Rotating Wheel Control with UIKit but on Android so I had to write my own, it is far from complete and it is drawn in an ugly way.
But at least the main functionality that selects a sector from the pie works without any problems.
Feel free to fork the project and please notify me, when you enhance it.
Thanks for Jason Valestin's radial-menu-widget for giving me the idea of how to draw a Pie.
