Summary: Nested Classes | Ctors | Methods | Inherited Methods

ItemDetailsLookup

Kotlin |Java

public abstract class ItemDetailsLookup
extends Object

java.lang.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.

Example

 final class MyDetailsLookup extends ItemDetailsLookup {

   private final RecyclerView mRecyclerView;

   MyDetailsLookup(RecyclerView recyclerView) {
       mRecyclerView = recyclerView;
   }

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

Summary

Nested classes
class	ItemDetailsLookup.ItemDetails<K> An ItemDetails implementation provides the selection library with access to information about a specific RecyclerView item.

Public constructors
ItemDetailsLookup()

Public methods
abstract ItemDetails<K>	getItemDetails(MotionEvent e)

Inherited methods
From class java.lang.Object Object clone() boolean equals(Object arg0) void finalize() final Class<?> getClass() int hashCode() final void notify() final void notifyAll() String toString() final void wait(long arg0, int arg1) final void wait(long arg0) final void wait()

Public constructors

ItemDetailsLookup

public ItemDetailsLookup ()

Public methods

getItemDetails

public abstract ItemDetails<K> getItemDetails (MotionEvent e)

Parameters
e	MotionEvent

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