Customised NumberPicker capable of applying a font resource on its numbers. (it was quite difficult to discover this hack tho!!)

PrettyNumberPicker.kt

package <COM.MY.APPLICATION>

import android.content.Context
import android.util.AttributeSet
import android.view.View
import android.view.ViewGroup
import android.widget.EditText
import android.widget.NumberPicker

class PrettyNumberPicker(
    context: Context, attrs: AttributeSet?, defStyleAttr: Int, defStyleRes: Int
) : NumberPicker(context, attrs, defStyleAttr, defStyleRes) {
    constructor(context: Context) : this(context, null)
    constructor(context: Context, attrs: AttributeSet?) :
            this(context, attrs, android.R.attr.numberPickerStyle)

    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) :
            this(context, attrs, defStyleAttr, 0)

    override fun addView(child: View?, params: ViewGroup.LayoutParams?) {
        super.addView(child, params)
        if (child is EditText) {
            child.typeface = context.resources.getFont(<YOUR FONT RESOURCE ID HERE>)
            child.isEnabled = false
        }
    }
}