MPAndroidChart set center vertical line

Question

I want to set a vertical line in center of LineChart like this:

When scrolling to each point, it can notify to change the date below (

Answer 1

Take a look at the method

protected void drawGridBackground(Canvas c) {

in the BarLineChartBase class (parent for a LineChart). In that method you have all data to draw your line right in the middle. Something like this

RectF rectF = mViewPortHandler.getContentRect();
float xMiddle = (rectF.right - rectF.left)/2;
Paint p = new Paint();
p.setColor(Color.BLACK);
c.drawLine(xMiddle, rectF.bottom, xMiddle, rectF.top, p);