Callback
abstract class Callback
| kotlin.Any | |
| ↳ | androidx.paging.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 executor defined by Builder#setNotifyExecutor(Executor), which is generally the main/UI thread.
Summary
Public constructors |
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<init>()Callback signaling when content is loaded into the list. |
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Public methods |
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| abstract Unit |
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 Unit |
onInserted(position: Int, count: Int)Called when new items have been loaded at the end or beginning of the list. |
| abstract Unit |
Called when items have been removed at the end or beginning of the list, and have not been replaced by padded nulls. |
Public constructors
<init>
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 executor defined by Builder#setNotifyExecutor(Executor), which is generally the main/UI thread.
Public methods
onChanged
abstract fun onChanged(position: Int, count: Int): Unit
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 | |
|---|---|
position |
Int: Position of first newly loaded items, out of total number of items (including padded nulls). |
count |
Int: Number of items loaded. |
onInserted
abstract fun onInserted(position: Int, count: Int): Unit
Called when new items have been loaded at the end or beginning of the list.
| Parameters | |
|---|---|
position |
Int: Position of the first newly loaded item (in practice, either 0 or size - 1. |
count |
Int: Number of items loaded. |
onRemoved
abstract fun onRemoved(position: Int, count: Int): Unit
Called when items have been removed at the end or beginning of the list, and have not been replaced by padded nulls.
| Parameters | |
|---|---|
position |
Int: Position of the first newly loaded item (in practice, either 0 or size - 1. |
count |
Int: Number of items loaded. |