# android.arch.paging # android.arch.paging | The`android.arch`Architecture Components packages are no longer maintained. They have been superseded by the corresponding[androidx.\*](https://developer.android.com/jetpack/androidx/migrate)packages. See[androidx.paging](https://developer.android.com/reference/androidx/paging/package-summary)instead. ## Interfaces |------------------------------------------------------------------------------------------------------------------------------|---------------------------------------| | [DataSource.InvalidatedCallback](https://developer.android.com/reference/android/arch/paging/DataSource.InvalidatedCallback) | Invalidation callback for DataSource. | ## Classes |--------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [AsyncPagedListDiffer](https://developer.android.com/reference/android/arch/paging/AsyncPagedListDiffer)\ | Helper object for mapping a[PagedList](https://developer.android.com/reference/android/arch/paging/PagedList)into a[RecyclerView.Adapter](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter). | | [DataSource](https://developer.android.com/reference/android/arch/paging/DataSource)\ | Base class for loading pages of snapshot data into a[PagedList](https://developer.android.com/reference/android/arch/paging/PagedList). | | [DataSource.Factory](https://developer.android.com/reference/android/arch/paging/DataSource.Factory)\ | Factory for DataSources. | | [ItemKeyedDataSource](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource)\ | Incremental data loader for paging keyed content, where loaded content uses previously loaded items as input to future loads. | | [ItemKeyedDataSource.LoadCallback](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource.LoadCallback)\ | Callback for ItemKeyedDataSource[loadBefore(LoadParams, LoadCallback)](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource#loadBefore(android.arch.paging.ItemKeyedDataSource.LoadParams, android.arch.paging.ItemKeyedDataSource.LoadCallback))and[loadAfter(LoadParams, LoadCallback)](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource#loadAfter(android.arch.paging.ItemKeyedDataSource.LoadParams, android.arch.paging.ItemKeyedDataSource.LoadCallback))to return data. | | [ItemKeyedDataSource.LoadInitialCallback](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource.LoadInitialCallback)\ | Callback for[loadInitial(LoadInitialParams, LoadInitialCallback)](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource#loadInitial(android.arch.paging.ItemKeyedDataSource.LoadInitialParams, android.arch.paging.ItemKeyedDataSource.LoadInitialCallback))to return data and, optionally, position/count information. | | [ItemKeyedDataSource.LoadInitialParams](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource.LoadInitialParams)\ | Holder object for inputs to[loadInitial(LoadInitialParams, LoadInitialCallback)](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource#loadInitial(android.arch.paging.ItemKeyedDataSource.LoadInitialParams, android.arch.paging.ItemKeyedDataSource.LoadInitialCallback)). | | [ItemKeyedDataSource.LoadParams](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource.LoadParams)\ | Holder object for inputs to[loadBefore(LoadParams, LoadCallback)](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource#loadBefore(android.arch.paging.ItemKeyedDataSource.LoadParams, android.arch.paging.ItemKeyedDataSource.LoadCallback))and[loadAfter(LoadParams, LoadCallback)](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource#loadAfter(android.arch.paging.ItemKeyedDataSource.LoadParams, android.arch.paging.ItemKeyedDataSource.LoadCallback)). | | [LivePagedListBuilder](https://developer.android.com/reference/android/arch/paging/LivePagedListBuilder)\ | Builder for`LiveData`, given a[DataSource.Factory](https://developer.android.com/reference/android/arch/paging/DataSource.Factory)and a[PagedList.Config](https://developer.android.com/reference/android/arch/paging/PagedList.Config). | | [PagedList](https://developer.android.com/reference/android/arch/paging/PagedList)\ | Lazy loading list that pages in immutable content from a[DataSource](https://developer.android.com/reference/android/arch/paging/DataSource). | | [PagedList.BoundaryCallback](https://developer.android.com/reference/android/arch/paging/PagedList.BoundaryCallback)\ | Signals when a PagedList has reached the end of available data. | | [PagedList.Builder](https://developer.android.com/reference/android/arch/paging/PagedList.Builder)\ | Builder class for PagedList. | | [PagedList.Callback](https://developer.android.com/reference/android/arch/paging/PagedList.Callback) | Callback signaling when content is loaded into the list. | | [PagedList.Config](https://developer.android.com/reference/android/arch/paging/PagedList.Config) | Configures how a PagedList loads content from its DataSource. | | [PagedList.Config.Builder](https://developer.android.com/reference/android/arch/paging/PagedList.Config.Builder) | Builder class for[PagedList.Config](https://developer.android.com/reference/android/arch/paging/PagedList.Config). | | [PagedListAdapter](https://developer.android.com/reference/android/arch/paging/PagedListAdapter)\ | [RecyclerView.Adapter](https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter)base class for presenting paged data from[PagedList](https://developer.android.com/reference/android/arch/paging/PagedList)s in a[RecyclerView](https://developer.android.com/reference/android/support/v7/widget/RecyclerView). | | [PageKeyedDataSource](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource)\ | Incremental data loader for page-keyed content, where requests return keys for next/previous pages. | | [PageKeyedDataSource.LoadCallback](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource.LoadCallback)\ | Callback for PageKeyedDataSource[loadBefore(LoadParams, LoadCallback)](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource#loadBefore(android.arch.paging.PageKeyedDataSource.LoadParams, android.arch.paging.PageKeyedDataSource.LoadCallback))and[loadAfter(LoadParams, LoadCallback)](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource#loadAfter(android.arch.paging.PageKeyedDataSource.LoadParams, android.arch.paging.PageKeyedDataSource.LoadCallback))to return data. | | [PageKeyedDataSource.LoadInitialCallback](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource.LoadInitialCallback)\ | Callback for[loadInitial(LoadInitialParams, LoadInitialCallback)](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource#loadInitial(android.arch.paging.PageKeyedDataSource.LoadInitialParams, android.arch.paging.PageKeyedDataSource.LoadInitialCallback))to return data and, optionally, position/count information. | | [PageKeyedDataSource.LoadInitialParams](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource.LoadInitialParams)\ | Holder object for inputs to[loadInitial(LoadInitialParams, LoadInitialCallback)](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource#loadInitial(android.arch.paging.PageKeyedDataSource.LoadInitialParams, android.arch.paging.PageKeyedDataSource.LoadInitialCallback)). | | [PageKeyedDataSource.LoadParams](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource.LoadParams)\ | Holder object for inputs to[loadBefore(LoadParams, LoadCallback)](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource#loadBefore(android.arch.paging.PageKeyedDataSource.LoadParams, android.arch.paging.PageKeyedDataSource.LoadCallback))and[loadAfter(LoadParams, LoadCallback)](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource#loadAfter(android.arch.paging.PageKeyedDataSource.LoadParams, android.arch.paging.PageKeyedDataSource.LoadCallback)). | | [PositionalDataSource](https://developer.android.com/reference/android/arch/paging/PositionalDataSource)\ | Position-based data loader for a fixed-size, countable data set, supporting fixed-size loads at arbitrary page positions. | | [PositionalDataSource.LoadInitialCallback](https://developer.android.com/reference/android/arch/paging/PositionalDataSource.LoadInitialCallback)\ | Callback for[loadInitial(LoadInitialParams, LoadInitialCallback)](https://developer.android.com/reference/android/arch/paging/PositionalDataSource#loadInitial(android.arch.paging.PositionalDataSource.LoadInitialParams, android.arch.paging.PositionalDataSource.LoadInitialCallback))to return data, position, and count. | | [PositionalDataSource.LoadInitialParams](https://developer.android.com/reference/android/arch/paging/PositionalDataSource.LoadInitialParams) | Holder object for inputs to[loadInitial(LoadInitialParams, LoadInitialCallback)](https://developer.android.com/reference/android/arch/paging/PositionalDataSource#loadInitial(android.arch.paging.PositionalDataSource.LoadInitialParams, android.arch.paging.PositionalDataSource.LoadInitialCallback)). | | [PositionalDataSource.LoadRangeCallback](https://developer.android.com/reference/android/arch/paging/PositionalDataSource.LoadRangeCallback)\ | Callback for PositionalDataSource[loadRange(LoadRangeParams, LoadRangeCallback)](https://developer.android.com/reference/android/arch/paging/PositionalDataSource#loadRange(android.arch.paging.PositionalDataSource.LoadRangeParams, android.arch.paging.PositionalDataSource.LoadRangeCallback))to return data. | | [PositionalDataSource.LoadRangeParams](https://developer.android.com/reference/android/arch/paging/PositionalDataSource.LoadRangeParams) | Holder object for inputs to[loadRange(LoadRangeParams, LoadRangeCallback)](https://developer.android.com/reference/android/arch/paging/PositionalDataSource#loadRange(android.arch.paging.PositionalDataSource.LoadRangeParams, android.arch.paging.PositionalDataSource.LoadRangeCallback)). | | [RxPagedListBuilder](https://developer.android.com/reference/android/arch/paging/RxPagedListBuilder)\ | Builder for`Observable`or`Flowable`, given a[DataSource.Factory](https://developer.android.com/reference/android/arch/paging/DataSource.Factory)and a[PagedList.Config](https://developer.android.com/reference/android/arch/paging/PagedList.Config). | - ## Interfaces - [DataSource.InvalidatedCallback](https://developer.android.com/reference/android/arch/paging/DataSource.InvalidatedCallback) - ## Classes - [AsyncPagedListDiffer](https://developer.android.com/reference/android/arch/paging/AsyncPagedListDiffer) - [DataSource](https://developer.android.com/reference/android/arch/paging/DataSource) - [DataSource.Factory](https://developer.android.com/reference/android/arch/paging/DataSource.Factory) - [ItemKeyedDataSource](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource) - [ItemKeyedDataSource.LoadCallback](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource.LoadCallback) - [ItemKeyedDataSource.LoadInitialCallback](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource.LoadInitialCallback) - [ItemKeyedDataSource.LoadInitialParams](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource.LoadInitialParams) - [ItemKeyedDataSource.LoadParams](https://developer.android.com/reference/android/arch/paging/ItemKeyedDataSource.LoadParams) - [LivePagedListBuilder](https://developer.android.com/reference/android/arch/paging/LivePagedListBuilder) - [PagedList](https://developer.android.com/reference/android/arch/paging/PagedList) - [PagedList.BoundaryCallback](https://developer.android.com/reference/android/arch/paging/PagedList.BoundaryCallback) - [PagedList.Builder](https://developer.android.com/reference/android/arch/paging/PagedList.Builder) - [PagedList.Callback](https://developer.android.com/reference/android/arch/paging/PagedList.Callback) - [PagedList.Config](https://developer.android.com/reference/android/arch/paging/PagedList.Config) - [PagedList.Config.Builder](https://developer.android.com/reference/android/arch/paging/PagedList.Config.Builder) - [PagedListAdapter](https://developer.android.com/reference/android/arch/paging/PagedListAdapter) - [PageKeyedDataSource](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource) - [PageKeyedDataSource.LoadCallback](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource.LoadCallback) - [PageKeyedDataSource.LoadInitialCallback](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource.LoadInitialCallback) - [PageKeyedDataSource.LoadInitialParams](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource.LoadInitialParams) - [PageKeyedDataSource.LoadParams](https://developer.android.com/reference/android/arch/paging/PageKeyedDataSource.LoadParams) - [PositionalDataSource](https://developer.android.com/reference/android/arch/paging/PositionalDataSource) - [PositionalDataSource.LoadInitialCallback](https://developer.android.com/reference/android/arch/paging/PositionalDataSource.LoadInitialCallback) - [PositionalDataSource.LoadInitialParams](https://developer.android.com/reference/android/arch/paging/PositionalDataSource.LoadInitialParams) - [PositionalDataSource.LoadRangeCallback](https://developer.android.com/reference/android/arch/paging/PositionalDataSource.LoadRangeCallback) - [PositionalDataSource.LoadRangeParams](https://developer.android.com/reference/android/arch/paging/PositionalDataSource.LoadRangeParams) - [RxPagedListBuilder](https://developer.android.com/reference/android/arch/paging/RxPagedListBuilder)