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ItemTouchHelper.ViewDropHandler

public static interface ItemTouchHelper.ViewDropHandler

androidx.recyclerview.widget.ItemTouchHelper.ViewDropHandler


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

Summary

Public methods

abstract void prepareForDrop(View view, View target, int x, int y)

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

Public methods

prepareForDrop

public abstract void prepareForDrop (View view, 
                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
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.