Xamarin Mobile Development for Android Cookbook

Drawing on the canvas of a View

Sometimes using the animation and shape APIs are not enough to create the image or app that we want to create. This may be to create a game or draw a complex image.

How to do it...

Drawing to a canvas can be easily done by creating a new view that derives from View, and then overriding the OnDraw() method:

1. First, we will need our custom View instance that implements the constructors that allow us to instantiate the view from either code or a layout file:

   public class CustomView : View { public CustomView(Context context) : base(context) { } public CustomView(Context context, IAttributeSet attrs) : base(context, attrs) { } public CustomView( Context context, IAttributeSet attrs, int defStyle) : base (context, attrs, ...