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int x = (int)(mCenter+mRadius/2/2*Math.cos(angle)); int y = (int)(mCenter+mRadius/2/2*Math.sin(angle)); x和y是图片的中心点，为什么x-imgWidth就是左上角了呢？

qq_凈鈊奮_0

2017-08-02

源自：Android实现抽奖转盘  3-4

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weixin_慕工程1563154
2022-03-29
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活在阳光下走在冷风中
2017-08-12

屏幕的左上角为起点（0，0），x-imgWidth为图片的左边坐标而不是左上角的坐标

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使用SurfaceView来实现抽奖转盘，剖析抽奖转盘背后的概率机制

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