ItemTouchHelper.ViewDropHandler

public 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 methods
abstract void
prepareForDrop(@NonNull View view, @NonNull View target, int x, int y)

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

Public methods

prepareForDrop

Added in 1.0.0
abstract void prepareForDrop(@NonNull View view, @NonNull View target, int x, int y)

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
@NonNull 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.
@NonNull View target

The target view which is being dropped on.
int x

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

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