E.4. How do I draw to the screen?

Flutter has an API based on the same rendering engine as Android; it’s also called Canvas. You draw to the canvas, which is housed by a widget, using the CustomPainter class that you use to run your algorithm. This paints lines and shapes to the screen. There’s a big section on this in chapter 6 of this book, but in general, the Flutter canvas should feel very familiar to Android developers.