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.

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.

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.

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.

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.

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.