如何在Android中找到路径中的所有点? [英] How do I find all the Points in a Path in Android?

问题描述

不久前我问了一个问题，看看我是否能够在路径中找到一对特定的点；但是，这次我想知道是否有办法知道路径中的所有点?(我找不到这样做的方法，这很不幸，因为 Java 提供了一种方法，而 Android 没有?)

Awhile back I asked a question to see if I was able to find a pair of specific points in a path; however, this time I want to know if there is a way to know all points in a path? (I couldn't find a method that did so, which is unfortunate because Java provides a way to do this, just not Android?)

我问这个的原因是因为我有多个几何图形，我想比较这些点以查看它们相交的位置.

The reason I ask this is because I have multiple geometric graphs and I want to compare the points to see where they intersect.

感谢任何有用的回复

推荐答案

如果您已经创建了 Path，这意味着在您的代码的某些点，您知道确切的 (Geo) 点.你为什么不把这个点放在 ArrayList 或类似的东西上?

If you have created a Path that means that in some point of your code, you know the exact (Geo)point. Why don't you put this point(s) on a ArrayList or something similar?

例如在做之前:

path.lineTo(point.x, point.y);

你可以:

yourList.add(point);
path.lineTo(point.x, point.y);

然后你可以从 ArrayList 得到你所有的点数.请注意，您可以利用增强的 For 循环语法ArrayList 的执行速度提高了三倍.

And later you can get all your points from the ArrayList. Note you that you can take advantage of the Enhanced For Loop Syntax of ArrayList that execute up to three times faster.

这篇关于如何在Android中找到路径中的所有点?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！