Android : How to create a bitmap with exact physical size in inches

I need to create a bitmap in android and draw some stuff on it using a canvas which will eventually be printed using a photo printer. Basically I'm trying to create a jpg of actual 5x7 size (5 inches X 7 inches). So if the bitmap is emailed or copied to a computer, it correctly fit into a 5X7 photo printing paper.

When specifying the height and width in the createbitmap method, what values do I need to specify to make the actual size of the bitmap 5x7. Is this dependent on the screen density etc., of the device?