ItemTouchHelper.ViewDropHandler

interface ItemTouchHelper.ViewDropHandler

Known direct subclasses
LinearLayoutManager

A RecyclerView.LayoutManager implementation which provides similar functionality to android.widget.ListView.
Known indirect subclasses
GridLayoutManager

A RecyclerView.LayoutManager implementations that lays out items in a grid.
WearableLinearLayoutManager

This wear-specific implementation of LinearLayoutManager provides basic offsetting logic for updating child layout.

An interface which can be implemented by LayoutManager for better integration with ItemTouchHelper.

Summary

Public functions
Unit
prepareForDrop(view: View, target: View, x: Int, y: Int)

Called by the ItemTouchHelper after a View is dropped over another View.

Public functions

prepareForDrop

Added in 1.0.0
fun prepareForDrop(view: View, target: View, x: Int, y: Int): Unit

Called by the ItemTouchHelper after a View is dropped over another View.

A LayoutManager should implement this interface to get ready for the upcoming move operation.

For example, LinearLayoutManager sets up a "scrollToPositionWithOffset" calls so that the View under drag will be used as an anchor View while calculating the next layout, making layout stay consistent.

Parameters
view: View

The View which is being dragged. It is very likely that user is still dragging this View so there might be other calls to prepareForDrop() after this one.
target: View

The target view which is being dropped on.
x: Int

The left offset of the View that is being dragged. This value includes the movement caused by the user.
y: Int

The top offset of the View that is being dragged. This value includes the movement caused by the user.