ListUpdateCallback

Added in 1.0.0

Kotlin |Java

interface ListUpdateCallback

Known direct subclasses

`AdapterListUpdateCallback`	ListUpdateCallback that dispatches update events to the given adapter.
`BatchingListUpdateCallback`	Wraps a `ListUpdateCallback` callback and batches operations that can be merged.
`SortedList.Callback`	The class that controls the behavior of the `SortedList`.

Known indirect subclasses

`SortedList.BatchedCallback`	A callback implementation that can batch notify events dispatched by the SortedList.
`SortedListAdapterCallback`	A `SortedList.Callback` implementation that can bind a `SortedList` to a `RecyclerView.Adapter`.

An interface that can receive Update operations that are applied to a list.

This class can be used together with DiffUtil to detect changes between two lists.

Summary

Public functions
`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.

Added in 1.0.0

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.
`payload: Any?`	The payload for the changed items.

Added in 1.0.0

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.

Added in 1.0.0

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.

Added in 1.0.0

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.