# ListUpdateCallback added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) belongs to Maven artifact com.android.support:recyclerview-v7:28.0.0-alpha1 Summary:[Methods](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback#pubmethods)\|[\[Expand All\]](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback#) # ListUpdateCallback | This package is part of the Android[support library](https://developer.android.com/topic/libraries/support-library)which is no longer maintained. The support library has been superseded by[AndroidX](https://developer.android.com/jetpack/androidx)which is part of[Jetpack](https://developer.android.com/jetpack). We recommend using the AndroidX libraries in all new projects. You should also consider[migrating](https://developer.android.com/jetpack/androidx/migrate)existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library[class mappings](https://developer.android.com/jetpack/androidx/migrate/class-mappings). ` public interface ListUpdateCallback ` ` ` |--------------------------------------------| | android.support.v7.util.ListUpdateCallback | |---|---| | [![](https://developer.android.com/static/assets/images/styles/disclosure_down.png)](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback#)Known Indirect Subclasses [AdapterListUpdateCallback](https://developer.android.com/reference/android/support/v7/util/AdapterListUpdateCallback),[BatchingListUpdateCallback](https://developer.android.com/reference/android/support/v7/util/BatchingListUpdateCallback),[SortedList.BatchedCallback](https://developer.android.com/reference/android/support/v7/util/SortedList.BatchedCallback)\,[SortedList.Callback](https://developer.android.com/reference/android/support/v7/util/SortedList.Callback)\,[SortedListAdapterCallback](https://developer.android.com/reference/android/support/v7/widget/util/SortedListAdapterCallback)\ |-------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [AdapterListUpdateCallback](https://developer.android.com/reference/android/support/v7/util/AdapterListUpdateCallback) | ListUpdateCallback that dispatches update events to the given adapter. | | [BatchingListUpdateCallback](https://developer.android.com/reference/android/support/v7/util/BatchingListUpdateCallback) | Wraps a[ListUpdateCallback](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback)callback and batches operations that can be merged. | | [SortedList.BatchedCallback](https://developer.android.com/reference/android/support/v7/util/SortedList.BatchedCallback)\ | A callback implementation that can batch notify events dispatched by the SortedList. | | [SortedList.Callback](https://developer.android.com/reference/android/support/v7/util/SortedList.Callback)\ | The class that controls the behavior of the[SortedList](https://developer.android.com/reference/android/support/v7/util/SortedList). | | [SortedListAdapterCallback](https://developer.android.com/reference/android/support/v7/widget/util/SortedListAdapterCallback)\ | A[SortedList.Callback](https://developer.android.com/reference/android/support/v7/util/SortedList.Callback)implementation that can bind a[SortedList](https://developer.android.com/reference/android/support/v7/util/SortedList)to a[RecyclerView.Adapter](https://developer.android.com/reference/android/support/v7/widget/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](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback#onChanged(int, int, java.lang.Object))`(int position, int count, Object payload) ` Called when`count`number of items are updated at the given position. | | ` abstract void` | ` `[onInserted](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback#onInserted(int, int))`(int position, int count) ` Called when`count`number of items are inserted at the given position. | | ` abstract void` | ` `[onMoved](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback#onMoved(int, int))`(int fromPosition, int toPosition) ` Called when an item changes its position in the list. | | ` abstract void` | ` `[onRemoved](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback#onRemoved(int, int))`(int position, int count) ` Called when`count`number of items are removed from the given position. | ## Public methods ### onChanged added in[version 25.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` 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`
| ### onInserted added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` 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.
| ### onMoved added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` 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.
| ### onRemoved added in[version 22.1.0](https://developer.android.com/topic/libraries/support-library/revisions) ``` 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.
| - ## Interfaces - [ListUpdateCallback](https://developer.android.com/reference/android/support/v7/util/ListUpdateCallback) - ## Classes - [AdapterListUpdateCallback](https://developer.android.com/reference/android/support/v7/util/AdapterListUpdateCallback) - [AsyncListUtil](https://developer.android.com/reference/android/support/v7/util/AsyncListUtil) - [AsyncListUtil.DataCallback](https://developer.android.com/reference/android/support/v7/util/AsyncListUtil.DataCallback) - [AsyncListUtil.ViewCallback](https://developer.android.com/reference/android/support/v7/util/AsyncListUtil.ViewCallback) - [BatchingListUpdateCallback](https://developer.android.com/reference/android/support/v7/util/BatchingListUpdateCallback) - [DiffUtil](https://developer.android.com/reference/android/support/v7/util/DiffUtil) - [DiffUtil.Callback](https://developer.android.com/reference/android/support/v7/util/DiffUtil.Callback) - [DiffUtil.DiffResult](https://developer.android.com/reference/android/support/v7/util/DiffUtil.DiffResult) - [DiffUtil.ItemCallback](https://developer.android.com/reference/android/support/v7/util/DiffUtil.ItemCallback) - [SortedList](https://developer.android.com/reference/android/support/v7/util/SortedList) - [SortedList.BatchedCallback](https://developer.android.com/reference/android/support/v7/util/SortedList.BatchedCallback) - [SortedList.Callback](https://developer.android.com/reference/android/support/v7/util/SortedList.Callback)