Draw fill bezier curve

RallyLineGraphChart.kt

override fun onDraw(canvas: Canvas?) {
    super.onDraw(canvas)
    try {
    ...
    borderPath.set(path)
    path.lineTo(width.toFloat(), height.toFloat())
    path.lineTo(0f, height.toFloat())
    canvas?.drawPath(path, pathPaint)
    canvas?.drawPath(borderPath, borderPathPaint)
    } catch (e: Exception) {
    }
}