This code is a showcase of a foldable animation I created for Worldline. The code is fully written with java APIs from the Android SDK, without the use of any external library. This code is a demo and not a library. The foldable layout is a layout (strictly a RelativeLayout), which can have two child layouts, one for the cover, and one for the details. The foldable layout takes care of the folding animation between those two layouts. In the demo the foldable layout is used in a RecyclerView, to show that it can manage well its size even during animation.