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belongs to Maven artifact


public abstract class ItemDetailsLookup
extends Object

   ↳ androidx.recyclerview.selection.ItemDetailsLookup<K>

The Selection library calls getItemDetails(MotionEvent) when it needs access to information about the area and/or ItemDetailsLookup.ItemDetails under a MotionEvent. Your implementation must negotiate ViewHolder lookup with the corresponding RecyclerView instance, and the subsequent conversion of the ViewHolder instance to an ItemDetailsLookup.ItemDetails instance.


 final class MyDetailsLookup extends ItemDetailsLookup {

   private final RecyclerView mRecyclerView;

   MyDetailsLookup(RecyclerView recyclerView) {
       mRecyclerView = recyclerView;

   public ItemDetails getItemDetails(MotionEvent e) {
       View view = mRecView.findChildViewUnder(e.getX(), e.getY());
       if (view != null) {
           ViewHolder holder = mRecView.getChildViewHolder(view);
           if (holder instanceof MyHolder) {
               return ((MyHolder) holder).getItemDetails();
       return null;


Nested classes

class ItemDetailsLookup.ItemDetails<K>

An ItemDetails implementation provides the selection library with access to information about a specific RecyclerView item. 

Public constructors


Public methods

abstract ItemDetails<K> getItemDetails(MotionEvent e)

Inherited methods

From class java.lang.Object

Public constructors


ItemDetailsLookup ()

Public methods


ItemDetails<K> getItemDetails (MotionEvent e)

e MotionEvent

ItemDetails<K> the ItemDetails for the item under the event, or null.

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