added in version 22.1.0

android.support.v7.util

Interfaces

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

AdapterListUpdateCallback	ListUpdateCallback that dispatches update events to the given adapter.
AsyncListUtil<T>	A utility class that supports asynchronous content loading.
AsyncListUtil.DataCallback<T>	The callback that provides data access for `AsyncListUtil`.
AsyncListUtil.ViewCallback	The callback that links `AsyncListUtil` with the list view.
BatchingListUpdateCallback	Wraps a `ListUpdateCallback` callback and batches operations that can be merged.
DiffUtil	DiffUtil is a utility class that can calculate the difference between two lists and output a list of update operations that converts the first list into the second one.
DiffUtil.Callback	A Callback class used by DiffUtil while calculating the diff between two lists.
DiffUtil.DiffResult	This class holds the information about the result of a `calculateDiff(Callback, boolean)` call.
DiffUtil.ItemCallback<T>	Callback for calculating the diff between two non-null items in a list.
SortedList<T>	A Sorted list implementation that can keep items in order and also notify for changes in the list such that it can be bound to a `RecyclerView.Adapter`.
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`.