class PageBarFragment: Fragment() {
    ...
    private val pageTextView: TextView get() = buildPageTextView()

    private fun buildPageTextView(): TextView {
        val pageTextView = TextView(context)
        pageTextView.setOnClickListener {
            currentPage = pageTextView.text.toString().toInt()
            changePage(currentPage)
        }

        val params = RelativeLayout.LayoutParams(
            ViewGroup.LayoutParams.WRAP_CONTENT,
            ViewGroup.LayoutParams.MATCH_PARENT)
        params.rightMargin = 8
        pageTextView.layoutParams = params
        pageTextView.textAlignment = View.TEXT_ALIGNMENT_CENTER
        pageTextView.textSize = 20.toFloat()

        val textColor = ContextCompat.getColor(requireContext(), R.color.colorText)
        pageTextView.setTextColor(textColor)
        return pageTextView
    }

    fun updatePageList() {
        binding.pageList.removeAllViewsInLayout()
        ...

        fun addPagesRange(start: Int, end: Int) {
            for (page in start..end) {
                val pageView = pageTextView
                pageView.text = page.toString()
                if (page == currentPage) {
                    val accentColor = ContextCompat.getColor(requireContext(), R.color.colorLinkText)
                    pageView.setTextColor(accentColor)
                }
                binding.pageList.addView(pageView)
            }
        }
        ...
}



<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary">

    <LinearLayout
        android:id="@+id/page_list"
        android:layout_width="0dp"
        android:layout_height="30dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/next_page_button"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toEndOf="@+id/prev_page_button"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="1.0" >
    </LinearLayout>

    <ImageView
        android:id="@+id/prev_page_button"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        android:textAlignment="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="1.0"
        app:srcCompat="@drawable/ic_arrow_left" />

    <ImageView
        android:id="@+id/next_page_button"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:textAlignment="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="1.0"
        app:srcCompat="@drawable/ic_arrow_right" />

    <EditText
        android:id="@+id/page_number_field"
        android:layout_width="54dp"
        android:layout_height="32dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:inputType="number"
        app:layout_constraintBottom_toTopOf="@+id/page_list"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>