How to add quotations to the end of the end of the text using drawLeadingMargin

Question

I'm trying to fix a bug in our app, there is an option to quote a message, when you quote a message we need to add a quotation " with special styling (color and different font styling). The first quote is being added correctly but I need to add the second quote at the end of the text.

This is portion of the class that we are using to add manually "

public class ZMQuoteSpan extends MetricAffectingSpan {
...
@Override
public void drawLeadingMargin(Canvas c, Paint p, int x, int dir, int top, int baseline, int bottom,
                              CharSequence text, int start, int end, boolean first, Layout layout) {

    Paint.Style style = p.getStyle();
    int color = p.getColor();
    boolean isFakeBoldText = p.isFakeBoldText();
    Typeface oldTypeface = p.getTypeface();

    Typeface typeface = Typeface.create(Typeface.DEFAULT, Typeface.ITALIC);
    p.setTypeface(typeface);
    p.setColor(QUOTE_SYSBOLM_COLOR);
    p.setFakeBoldText(true);

    float textSize = ZmUIUtils.px2sp(context, (int)p.getTextSize());

    int spanStart = ((Spanned) text).getSpanStart(this);
    int spanEnd = ((Spanned) text).getSpanEnd(this);
    int y = layout.getLineBaseline(layout.getLineForOffset(spanStart));
    int endY = layout.getLineBaseline(layout.getLineForOffset(spanEnd));
    c.drawText("\"", x, y, p); //<---first quote this is working correctly 
    c.drawText("\"", textSize*text.length(), y, p); //<---second quote is not working correctly 

    p.setStyle(style);
    p.setColor(color);
    p.setFakeBoldText(isFakeBoldText);
    p.setTypeface(oldTypeface);
}

I'm not sure how to find the position (x,y) where I need to add the second quotation, the textview could have also new lines (\n) as part of the text which means the y cord needs to be changed accordingly. I'm attaching an image on how the second quotation looks now with the current codesample