Summary: Methods

ListUpdateCallback

Kotlin |Java

public interface ListUpdateCallback

androidx.recyclerview.widget.ListUpdateCallback

Known indirect subclasses

AdapterListUpdateCallback	ListUpdateCallback that dispatches update events to the given adapter.
BatchingListUpdateCallback	Wraps a `ListUpdateCallback` callback and batches operations that can be merged.
SortedList.BatchedCallback<T2>	A callback implementation that can batch notify events dispatched by the SortedList.
SortedList.Callback<T2>	The class that controls the behavior of the `SortedList`.
SortedListAdapterCallback<T2>	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 methods
`abstract void`	`onChanged(int position, int count, Object payload)` Called when `count` number of items are updated at the given position.
`abstract void`	`onInserted(int position, int count)` Called when `count` number of items are inserted at the given position.
`abstract void`	`onMoved(int fromPosition, int toPosition)` Called when an item changes its position in the list.
`abstract void`	`onRemoved(int position, int count)` Called when `count` number of items are removed from the given position.

public abstract 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`

public abstract 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.

public abstract 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.

public abstract 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.