Canvas drawing using SurfaceView

Remarks

It’s important to understand the basic concept of the surface view before using:

• It’s basically just a hole in the current window
• Native UI can be placed on top of it
• Drawing is done using a dedicated, non UI thread
• Drawing is not hardware accelerated
• Uses two buffers: One is currently shown, one is used for drawing.
• unlockCanvasAndPost() swaps the buffers.

Deadlocks can easily occur if the lockCanvas() and unlockCanvasAndPost() methods are not called in the correct order.