public class BarSeries extends AbstractSeries {

    @Override
    public void drawPoint(Canvas canvas, AbstractPoint point, float scaleX, float scaleY, Rect gridBounds) {
        final float x = (float) (gridBounds.left + (scaleX * (point.getX() - getMinX())));
        final float y = (float) (gridBounds.bottom - (scaleY * (point.getY() - getMinY())));

        canvas.drawLine(x,gridBounds.bottom, x, y, mPaint);
    }

    public static class LinearPoint extends AbstractPoint {
        public LinearPoint() {
            super();
        }

        public LinearPoint(double x, double y) {
            super(x, y);
        }
    }
}