Relationship between Surface and Canvas: Android

What exactly is the relationship between a Su开发者_高级运维rface and Canvas.

Please explain.

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A surface is a buffer. A Canvas holds the drawing.

Views are not attached to the Canvas nor the Surface. The window is tied to a Surface and the ViewRoot asks the Surface for a Canvas that is then used by the Views to draw onto.

For a detailled anwser, you can read this whole discussion, really interesting.