{% setvar book_path %}/reference/androidx/_book.yaml{% endsetvar %} {% include "_shared/_reference-head-tags.html" %}
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.
Public constructors |
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Callback() |
Public methods |
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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position, int count) Called when items have been removed at the end or beginning of the list, and have not been replaced by padded nulls. |
@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 | |
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int position |
Position of first newly loaded items, out of total number of items (including padded nulls). |
int count |
Number of items loaded. |
@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 | |
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int position |
Position of the first newly loaded item (in practice, either |
int count |
Number of items loaded. |
@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Called when items have been removed at the end or beginning of the list, and have not been replaced by padded nulls.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 | |
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int position |
Position of the first newly loaded item (in practice, either |
int count |
Number of items loaded. |