如何获取ScatterChart中像素点对应的x轴值（xIndex）？
我一直在查看该库的源代码，我认为下面的方法之一（我从此处的库的源代码复制/粘贴）可以提供帮助。这似乎getValuesByTouchPoint是正确的方法，但我不知道如何使用它。
/**
* Transformer class that contains all matrices and is responsible for
* transforming values into pixels on the screen and backwards.
*
* @author Philipp Jahoda
*/
public class Transformer {
/**
* matrix to map the values to the screen pixels
*/
protected Matrix mMatrixValueToPx = new Matrix();
/**
* matrix for handling the different offsets of the chart
*/
protected Matrix mMatrixOffset = new Matrix();
protected ViewPortHandler mViewPortHandler;
public Transformer(ViewPortHandler viewPortHandler) …