I have been creating a 2d game with surface view. My tileset images have a transparent color and not alpha. However I do have sprites that all have alpha transparency. My tilesets are under directories so they are in the assets so they are not described by xml. I would like to convert my tileset images from having a transparent color to having alpha so all my images are using alpha. The only way I've been able to do this is to get the pixels from the original image, create a new image with an alpha channel, then loop through each pixel looking for the transparent color and replacing it with alpha. It seems like I should be able to use PorterDuff but I've tried every option I can think of an none work right. I either get nothing in the image or the image without the transparent color changed to alpha. This seems like it should be easier but I can't find any examples or seem to get it right.
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