A function to programmatically add views to ConstraintLayout with Flow

ChipsView.kt

class ChipsView<T : Parcelable>(ctx: Context, attr: AttributeSet) : ConstraintLayout(ctx, attr) {
    ...
    
    private fun addSubviews() {
        val flow = Flow(context).apply {
            id = generateViewId()
            setWrapMode(Flow.WRAP_CHAIN)
            setHorizontalStyle(Flow.CHAIN_PACKED)
            setHorizontalAlign(Flow.HORIZONTAL_ALIGN_START)
            setHorizontalBias(0f)
            setVerticalGap(pillMarginWidth)
            setHorizontalGap(pillMarginWidth)
            setOrientation(Flow.HORIZONTAL)
            layoutParams = LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT)
        }

        val constraintSet = ConstraintSet().apply {
            clone(this@ChipsView)
            clear(flow.id, ConstraintSet.END)
            clear(flow.id, ConstraintSet.START)
            clear(flow.id, ConstraintSet.BOTTOM)
            connect(flow.id, ConstraintSet.START, ConstraintSet.PARENT_ID, ConstraintSet.START)
            connect(flow.id, ConstraintSet.END, ConstraintSet.PARENT_ID, ConstraintSet.END)
            connect(flow.id, ConstraintSet.BOTTOM, ConstraintSet.PARENT_ID, ConstraintSet.BOTTOM)
        }

        constraintSet.applyTo(this)
        addView(flow)

        val referenceIds = IntArray(pills.size)
        loop@ for ((index, pill) in pills.withIndex()) {
            val textView = pill.asTextView()
            referenceIds[index] = textView.id
            addView(textView)
        }

        flow.referencedIds = referenceIds

        post { requestLayout() }
    }
}