How do I change the text style of a selected tab when using tabLayout?

Question

I want to make the text of a selected tab bold. How can I do this either through xml or java code, whatever is easier.

Answer 1

I applied hoi's answer which is written above for default TabLayout with no custom view. It worked the best for me. But what I actually needed was to change the font family of the text inside the TabItem to a bolder one when a tab was selected. So following hoi's solution, I changed the code a bit to work for me. I am leaving this answer just in case if someone is trying to achieve something similar:

private fun addOnTabSelectedListener() {
        tabLayout.addOnTabSelectedListener(object : TabLayout.OnTabSelectedListener {
            override fun onTabReselected(tab: TabLayout.Tab?) {
                return
            }

            override fun onTabUnselected(tab: TabLayout.Tab?) {
                tab?.position?.let {
                    changeSelectedTabItemFontFamily(it, R.font.quicksand_medium)
                }
            }

            override fun onTabSelected(tab: TabLayout.Tab?) {
                tab?.position?.let {
                    changeSelectedTabItemFontFamily(it, R.font.quicksand_bold)
                }
            }
        })
    }

private fun changeSelectedTabItemFontFamily(tabPosition: Int, @FontRes fontFamilyRes: Int) {
        val linearLayout = (this.tabLayout.getChildAt(0) as ViewGroup).getChildAt(tabPosition) as LinearLayout
        val tabTextView = linearLayout.getChildAt(1) as TextView
        val typeface = ResourcesCompat.getFont(context, fontFamilyRes)
        tabTextView.typeface = typeface
}