                        课程
                    
                        /移动开发
                        
                            /Android
                        
                        /打造个性的图片预览与多点触控

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

关注问题我要回答

5452

操作

收起

1 回答

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