DragDrop.kt

// set on long click listener
launcherGrid.setOnItemLongClickListener { parent, view, position, id ->
    Timber.d("jsp grid item id=$id pos=$position long clicked")
    launcherAdapter().startDrag(view, position)
    false
}

data class DragData(val view: View,
                        val position: Int)

private fun startDrag(view:View, pos:Int) {
    val dragData = DragData(view, pos)
    val clipData = ClipData.newPlainText("", "")
    val v = dragData.view
    val shadowBuilder = View.DragShadowBuilder(v)
    @Suppress("DEPRECATION") // by now compile for api > 21 why do i need to check here?
    v.startDrag(clipData, shadowBuilder, dragData, 0)
    Timber.d("mc drag drop activated")
}

private fun startDrag(dragData: DragData) {
        dragDataX = dragData
        Timber.i("mc onDragEventStart(dragData=(container=${dragData.containerId}, " + "pos=${dragData.position}, type=${dragData.type}, " + "appItemId=${dragData.appItemId}, " + "folder=${dragData.folderItemId})")
        val clipData = ClipData.newPlainText("", "")
        val v = dragData.dragShadow
        val shadowBuilder = View.DragShadowBuilder(v)
        @Suppress("DEPRECATION") // by now compile for api > 21 why do i need to check here?
        v.startDrag(clipData, shadowBuilder, dragData, 0)
        Timber.d("mc drag drop activated")
    }