PagedList.Callback

public abstract class PagedList.Callback


Callback signaling when content is loaded into the list.

Can be used to listen to items being paged in and out. These calls will be dispatched on the dispatcher defined by PagedList.Builder.setNotifyDispatcher, which is generally the main/UI thread.

Summary

Public constructors

Public methods

abstract void
onChanged(int position, int count)

Called when null padding items have been loaded to signal newly available data, or when data that hasn't been used in a while has been dropped, and swapped back to null.

abstract void
onInserted(int position, int count)

Called when new items have been loaded at the end or beginning of the list.

abstract void
onRemoved(int position, int count)

Called when items have been removed at the end or beginning of the list, and have not been replaced by padded nulls.

Public constructors

Callback

public final Callback()

Public methods

onChanged

@NonNull
public abstract void onChanged(int position, int count)

Called when null padding items have been loaded to signal newly available data, or when data that hasn't been used in a while has been dropped, and swapped back to null.

Parameters
int position

Position of first newly loaded items, out of total number of items (including padded nulls).

int count

Number of items loaded.

onInserted

@NonNull
public abstract void onInserted(int position, int count)

Called when new items have been loaded at the end or beginning of the list.

Parameters
int position

Position of the first newly loaded item (in practice, either 0 or size - 1.

int count

Number of items loaded.

onRemoved

@NonNull
public abstract void onRemoved(int position, int count)

Called when items have been removed at the end or beginning of the list, and have not been replaced by padded nulls.

Parameters
int position

Position of the first newly loaded item (in practice, either 0 or size - 1.

int count

Number of items loaded.