- https://www.youtube.com/watch?v=jlKrTTdTCUE
- https://www.youtube.com/watch?v=H05mF0qrBVA
- https://www.youtube.com/watch?v=zdQRIYOST64
- https://medium.com/over-engineering/getting-started-with-drawing-on-the-android-canvas-621cf512f4c7
- https://medium.com/over-engineering/android-canvas-drawing-useful-graphics-classes-operations-2803e435e848
- https://medium.com/mobile-app-development-publication/expounding-android-canvas-drawtext-bae3d4fabc5a
- https://medium.com/mobile-app-development-publication/learn-all-android-canvas-draw-functions-dd5d6595884a
- https://www.journaldev.com/25182/android-canvas
- https://blog.mindorks.com/understanding-canvas-api-in-android
- https://jimbaca.com/what-is-canvas-in-android/
- https://developer.android.com/reference/android/graphics/Canvas
- https://developer.android.com/guide/topics/graphics
- https://developer.android.com/reference/android/graphics/package-summary
- https://developer.android.com/guide/topics/ui/how-android-draws
- https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Drawing_shapes