Перетаскивание в ConstraintLayout

Я пытаюсь перетащить в ConstraintLayout, как показано ниже,

override fun onLongClick(v: View?): Boolean {
    val dragData = ClipData.newPlainText("", "")
    val myShadow = View.DragShadowBuilder(v)

    if (Build.VERSION.SDK_INT>= Build.VERSION_CODES.N) {
        startDragAndDrop(dragData, myShadow, v, 0)
    }else{
        startDrag(dragData, myShadow, v, 0)
    }
    return true
}

И мой слушатель перетаскивания

private val mDragListen = View.OnDragListener { v, event ->
    val view = event.localState as TextView
    when (event.action) {
        DragEvent.ACTION_DRAG_STARTED -> {
            layoutParams = view.layoutParams as ConstraintLayout.LayoutParams?
            true
        }
        DragEvent.ACTION_DRAG_ENTERED -> {
            true
        }

        DragEvent.ACTION_DRAG_LOCATION ->
            true
        DragEvent.ACTION_DRAG_EXITED -> {
            true
        }
        DragEvent.ACTION_DROP -> {
            layoutParams?.marginStart = event.x.toInt()
            layoutParams?.topMargin = event.y.toInt()
            view.layoutParams = layoutParams
            view.invalidate()
            true
        }

        DragEvent.ACTION_DRAG_ENDED -> {
            when (event.result) {
                true ->
                    Toast.makeText(activity, "The drop was handled.", Toast.LENGTH_LONG)
                else ->
                    Toast.makeText(activity, "The drop didn't work.", Toast.LENGTH_LONG)
            }.show()
            true
        }
        else -> {
            Log.e("DragDrop Example", "Unknown action type received by OnDragListener.")
            false
        }
    }
}

Вот мой xml

<android.support.constraint.ConstraintLayout xmlns:android = "http://schemas.android.com/apk/res/android"
    xmlns:tools = "http://schemas.android.com/tools"
    android:layout_width = "match_parent"
    xmlns:app = "http://schemas.android.com/apk/res-auto"
    android:id = "@+id/clContainer"
    android:layout_height = "match_parent"
    tools:context = "com.guna.kotlinapplication.BlankFragment">

    <com.guna.kotlinapplication.DraggableTextView
        android:id = "@+id/image"
        android:layout_width = "wrap_content"
        android:layout_height = "wrap_content"
        android:layout_marginTop = "183dp"
        android:layout_marginStart = "56dp"
        android:paddingStart = "5dp"
        android:paddingLeft = "5dp"
        android:text = "@string/app_name"
        android:paddingEnd = "5dp"
        android:tag = "@string/app_name"
        android:textSize = "22sp"
        android:paddingRight = "5dp"
        app:layout_constraintTop_toTopOf = "parent"
        app:layout_constraintStart_toStartOf = "parent"
        android:src = "@drawable/ic_launcher_background" />
</android.support.constraint.ConstraintLayout>

Это работает, но не так, как ожидалось, см. Результат.