旋转图像时如何检测图像的哪一部分已被触摸? [英] How to detect which part of an image has been touched, when image is rotated?

问题描述

我有一张这样的图片.我可以使用​​此代码对其进行旋转.现在，我想知道与轮盘的位置无关的触摸了哪种颜色.例如，无论车轮处于以下哪个位置，我都应该能够检测到我触摸过的颜色...红色，黄色，绿色，蓝色，粉红色或灰色.

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.

有可能吗?我该怎么办?

Is it possible? How can I do it?

除了使用单张图片，还有其他可能性吗?(我希望避免使用此解决方案...)

Is there any other possibility instead of using a single picture?(solution I would prefer to avoid...)

或或或其他...

更新:我发布了一些颜色，因为我想更加清晰，为此我找到了解决方案，但是如果我有不同的图像而不是颜色，该怎么办.

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.

推荐答案

解码x&触摸事件的y位置，然后在位图上调用getPixel: http://developer.android.com/reference/android/graphics/Bitmap.html

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

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