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matrix.mapRect(rectF)到底是做什么用的？也没说啊

慕妹4463934

2016-04-08

源自：打造个性的图片预览与多点触控 2-4

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qq_茶壶上的蜗牛_0 回答被采纳 +3 积分
2016-04-13

Apply this matrix to the rectangle, and write the transformed rectangle
back into it. This is accomplished by transforming the 4 corners of rect,
and then setting it to the bounds of those points

根据宽高拿到在view在parent左上右下四个点的矩形范围