Dynamically generate pie chart color based on base color and number of slices.

PieChartColors

private fun getPieChartColors(
        numPieSlices: Int, adjacentColors: Boolean
    ): IntArray {
        val colors = IntArray(numPieSlices)
        val baseColor = Color.parseColor("#8A56E2")
        colors[0] = baseColor
        val hsv = FloatArray(3)
        Color.RGBToHSV(
            Color.red(baseColor), Color.green(baseColor), Color.blue(baseColor),
            hsv
        )
        val step = 240.0 / numPieSlices.toDouble()
        val baseHue = hsv[0]
        for (i in 1 until numPieSlices) {
            val nextColorHue = (baseHue + step * i.toFloat()).toFloat() % 240.0.toFloat()
            colors[i] = Color.HSVToColor(floatArrayOf(nextColorHue, hsv[1], hsv[2]))
        }

        if (!adjacentColors && numPieSlices > 2) {
            var holder: Int
            var i = 0
            var j = numPieSlices / 2
            while (j < numPieSlices) {
                // Swap
                holder = colors[i]
                colors[i] = colors[j]
                colors[j] = holder
                i += 2
                j += 2
            }
        }
        return colors
    }