Tablet - Get Drawable Screen Resolution, Not Total Screen Resolution
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With tablets and some phones running 4.0 there are on screen controls.  I am developing a full screen canvas-based game.  I adjust my canvas to fit the screen size with a matrix.  

On any device that has on screen buttons my app currently draws part of the games' controls under those buttons.  

Is there a way to determine the drawable screen resolution, IE the resolution minus any onscreen buttons? 