How to detect wich part of an image has been touched, when image is rotated?

问题

I have an image like this one. I can rotate it using this code. Now I would like to know, which color has been touched, independently of the wheel's position. For example, whatever of the following positions the wheel is in, I should be able to detect what color I have touched ...red, yellow, green,blue,pink or grey. Is it possible? How can I do it? Please help me, because I have no idea. Is there any other possibility instead of using a single picture?(solution I would prefer to avoid...)

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or whatever...

UPDATE: I post some colors because I wanted to be more clear, and I got a solution for this, but how could I do if I have different images instead of a color.

回答1:

Decode the x & y position of the touch event then call getPixel on the Bitmap: http://developer.android.com/reference/android/graphics/Bitmap.html

来源：https://stackoverflow.com/questions/10933130/how-to-detect-wich-part-of-an-image-has-been-touched-when-image-is-rotated