Join us on the livestream at Android Dev Summit on 7-8 November 2018, starting at 10AM PDT!

AdapterListUpdateCallback

public final class AdapterListUpdateCallback
extends Object implements ListUpdateCallback

java.lang.Object
   ↳ androidx.recyclerview.widget.AdapterListUpdateCallback


ListUpdateCallback that dispatches update events to the given adapter.

Summary

Public constructors

AdapterListUpdateCallback(Adapter adapter)

Creates an AdapterListUpdateCallback that will dispatch update events to the given adapter.

Public methods

void onChanged(int position, int count, Object payload)

Called when count number of items are updated at the given position.

void onInserted(int position, int count)

Called when count number of items are inserted at the given position.

void onMoved(int fromPosition, int toPosition)

Called when an item changes its position in the list.

void onRemoved(int position, int count)

Called when count number of items are removed from the given position.

Inherited methods

Public constructors

AdapterListUpdateCallback

public AdapterListUpdateCallback (Adapter adapter)

Creates an AdapterListUpdateCallback that will dispatch update events to the given adapter.

Parameters
adapter Adapter: The Adapter to send updates to.

Public methods

onChanged

public void onChanged (int position, 
                int count, 
                Object payload)

Called when count number of items are updated at the given position.

Parameters
position int: The position of the item which has been updated.

count int: The number of items which has changed.

payload Object

onInserted

public void onInserted (int position, 
                int count)

Called when count number of items are inserted at the given position.

Parameters
position int: The position of the new item.

count int: The number of items that have been added.

onMoved

public void onMoved (int fromPosition, 
                int toPosition)

Called when an item changes its position in the list.

Parameters
fromPosition int: The previous position of the item before the move.

toPosition int: The new position of the item.

onRemoved

public void onRemoved (int position, 
                int count)

Called when count number of items are removed from the given position.

Parameters
position int: The position of the item which has been removed.

count int: The number of items which have been removed.