The BakingApp is part of the Android developer Nanodegree of Udacity and Google.
It shows several recipes for baking a cake. The recipes have video content. The widget shows the ingredients of the last viewed recipe.
I have prepared the app with master-detail flow, Exoplayer, also prepared tests with the Espresso library.
I would be happy if you would like to contribute by adding, new features, functionality and UI polish.