added in version 24.1.0
belongs to Maven artifact com.android.support:recyclerview-v7:28.0.0-alpha1

Summary: Methods | [Expand All]

ItemTouchHelper.ViewDropHandler

This package is part of the Android support library which is no longer maintained. The support library has been superseded by AndroidX which is part of Jetpack. We recommend using the AndroidX libraries in all new projects. You should also consider migrating existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library class mappings.

public static interface ItemTouchHelper.ViewDropHandler

android.support.v7.widget.helper.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.

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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

added in version 24.1.0

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.

• Interfaces

  • ItemTouchHelper.ViewDropHandler
  • ItemTouchUIUtil

• Classes

  • ItemTouchHelper
  • ItemTouchHelper.Callback
  • ItemTouchHelper.SimpleCallback