SegmentedProgressBar2.kt

class SegmentedProgressBar @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : View(context, attrs, defStyleAttr) {

    @get:ColorInt
    var segmentColor: Int = Color.WHITE
    var segmentAlpha: Float = 1f

    private val segmentPath: Path = Path()
    private val segmentPaint: Paint = Paint(Paint.ANTI_ALIAS_FLAG)

    override fun onDraw(canvas: Canvas) {
        val w = width.toFloat()
        val h = height.toFloat()

        segmentPath.run {
            moveTo(0f, 0f)
            lineTo(w, 0f)
            lineTo(w, h)
            lineTo(0f, h)
            close()
        }

        segmentPaint.color = segmentColor
        segmentPaint.alpha = alpha.toAlphaPaint()

        canvas.drawPath(segmentPath, segmentPaint)
    }
}