Postman is a java library that uses code generation to handle the details of implementing the Parcelable interface on Android.
The project contains a customizable WheelPicker which is light and flexible.
Built upon the handwave library, this library uses the front camera to detect when hand motions are detected as hitting a border for left, right, up, and down or a click overtop your phone's front facing camera. It works for modern devices, uses OpenCV, and the camera feed is translucent.