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I need to convert 32bpp images in Android , an instance of Bitmap class with a Bitmap.Config as ARGB_8888.
1. How can I reduce the color depth image to 8bpp and 4bpp?
2. Does android provide any java helper classes to achieve the same?
You need to use an external image processing library to do that kind of color quantization. I would prefer use Leptonica. Its written in C but you can find Android Java bindings in this project