PatrykAndroid

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/viewPager2"
        android:layout_width="match_parent"

PatrykAndroid

class PageAdapter(private val items: List<Item>) : RecyclerView.Adapter<PageAdapter.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        return ViewHolder(LayoutInflater.from(parent.context).inflate(R.layout.item, parent, false))
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.item.setBackgroundColor(items[getRealPosition(position)].color)
    }

PatrykAndroid

fun animate() {
        view2.visibility = View.VISIBLE
        val params = ConstraintLayout.LayoutParams(-1, -1)
        view2.layoutParams = params
        val set = ConstraintSet()
        set.connect(view2.id, ConstraintSet.TOP, root.id, ConstraintSet.TOP)
        set.connect(view2.id, ConstraintSet.BOTTOM, view1.id, ConstraintSet.BOTTOM)
        set.connect(view2.id, ConstraintSet.START, view1.id, ConstraintSet.END)
        set.connect(view2.id, ConstraintSet.END, view3.id, ConstraintSet.START)
        val transition = AutoTransition()