Summary: Methods

ItemTouchHelper.ViewDropHandler

Kotlin |Java

public static interface ItemTouchHelper.ViewDropHandler

androidx.recyclerview.widget.ItemTouchHelper.ViewDropHandler

Known indirect subclasses

GridLayoutManager, LinearLayoutManager, WearableLinearLayoutManager

GridLayoutManager	A `RecyclerView.LayoutManager` implementations that lays out items in a grid.
LinearLayoutManager	A `RecyclerView.LayoutManager` implementation which provides similar functionality to `ListView`.
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(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.