android tab divider

TabDivider.kt

with(tabCatalog) {
            setupWithViewPager(vpCatalog)
            val linearLayout = getChildAt(0) as LinearLayout
            linearLayout.showDividers = LinearLayout.SHOW_DIVIDER_MIDDLE
            val drawable = GradientDrawable()
            drawable.setColor(ResourcesCompat.getColor(resources, R.color.black16, null))
            drawable.setSize(1, 1)
            linearLayout.dividerPadding = 40
            linearLayout.dividerDrawable = drawable
            requestLayout()
}