AdapterListUpdateCallback

Kotlin |Java

class AdapterListUpdateCallback : ListUpdateCallback

kotlin.Any
↳	androidx.recyclerview.widget.AdapterListUpdateCallback

ListUpdateCallback that dispatches update events to the given adapter.

Summary

Public constructors
<init>(@NonNull adapter: RecyclerView.Adapter<RecyclerView.ViewHolder!>) Creates an AdapterListUpdateCallback that will dispatch update events to the given adapter.

Public methods
Unit	onChanged(position: Int, count: Int, payload: Any?) Called when count number of items are updated at the given position.
Unit	onInserted(position: Int, count: Int) Called when count number of items are inserted at the given position.
Unit	onMoved(fromPosition: Int, toPosition: Int) Called when an item changes its position in the list.
Unit	onRemoved(position: Int, count: Int) Called when count number of items are removed from the given position.

Public constructors

<init>

AdapterListUpdateCallback(@NonNull adapter: RecyclerView.Adapter<RecyclerView.ViewHolder!>)

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

Parameters
adapter	RecyclerView.Adapter<RecyclerView.ViewHolder!>: The Adapter to send updates to.

Public methods

onChanged

fun onChanged(
    position: Int, 
    count: Int, 
    payload: Any?
): Unit

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.

onInserted

fun onInserted(
    position: Int, 
    count: Int
): Unit

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

fun onMoved(
    fromPosition: Int, 
    toPosition: Int
): Unit

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

fun onRemoved(
    position: Int, 
    count: Int
): Unit

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.