Mentioned in this talk:
Android Canvas API - https://developer.android.com/reference/android/graphics/Canvas.html
Custom Drawing - https://developer.android.com/training/custom-views/custom-drawing.html
Canvas and Drawables - https://developer.android.com/guide/topics/graphics/2d-graphics.html
Slides/source: https://github.com/aerb/canvas-talk
Presented at Toronto Android Developers Meetup on 2017-08-15
