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ItemKeyedDataSource.LoadCallback
public
static
abstract
class
ItemKeyedDataSource.LoadCallback
extends Object
| java.lang.Object
|
| ↳ |
android.arch.paging.ItemKeyedDataSource.LoadCallback<Value>
|
Callback for ItemKeyedDataSource loadBefore(LoadParams, LoadCallback)
and loadAfter(LoadParams, LoadCallback) to return data.
A callback can be called only once, and will throw if called again.
It is always valid for a DataSource loading method that takes a callback to stash the
callback and call it later. This enables DataSources to be fully asynchronous, and to handle
temporary, recoverable error states (such as a network error that can be retried).
Summary
Public methods |
|---|
abstract
void
|
onResult(List<Value> data)
Called to pass loaded data from a DataSource.
|
Inherited methods |
|---|
From class
java.lang.Object
Object
|
clone()
|
boolean
|
equals(Object arg0)
|
void
|
finalize()
|
final
Class<?>
|
getClass()
|
int
|
hashCode()
|
final
void
|
notify()
|
final
void
|
notifyAll()
|
String
|
toString()
|
final
void
|
wait(long arg0, int arg1)
|
final
void
|
wait(long arg0)
|
final
void
|
wait()
|
|
Public constructors
ItemKeyedDataSource.LoadCallback
ItemKeyedDataSource.LoadCallback ()
Public methods
Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
Last updated 2025-02-10 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-02-10 UTC."],[],[],null,["# ItemKeyedDataSource.LoadCallback\n\nSummary: [Ctors](#pubctors) \\| [Methods](#pubmethods) \\| [Inherited Methods](#inhmethods) \n\nItemKeyedDataSource.LoadCallback\n================================\n\n| The `android.arch` Architecture Components packages are no longer maintained. They have been superseded by the corresponding [androidx.\\*](/jetpack/androidx/migrate) packages. See [androidx.paging.ItemKeyedDataSource.LoadCallback](/reference/androidx/paging/ItemKeyedDataSource.LoadCallback) instead.\n\n\n`\npublic\nstatic\n\nabstract\nclass\nItemKeyedDataSource.LoadCallback\n`\n\n\n`\n\nextends Object\n\n\n`\n\n`\n\n\n`\n\n|---|---------------------------------------------------------------|\n| java.lang.Object ||\n| ↳ | android.arch.paging.ItemKeyedDataSource.LoadCallback\\\u003cValue\\\u003e |\n\n|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Known direct subclasses [ItemKeyedDataSource.LoadInitialCallback](/reference/android/arch/paging/ItemKeyedDataSource.LoadInitialCallback)\\\u003cValue\\\u003e |----------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [ItemKeyedDataSource.LoadInitialCallback](/reference/android/arch/paging/ItemKeyedDataSource.LoadInitialCallback)\\\u003cValue\\\u003e | Callback for [loadInitial(LoadInitialParams, LoadInitialCallback)](/reference/android/arch/paging/ItemKeyedDataSource#loadInitial(android.arch.paging.ItemKeyedDataSource.LoadInitialParams\u003cKey\u003e, android.arch.paging.ItemKeyedDataSource.LoadInitialCallback\u003cValue\u003e)) to return data and, optionally, position/count information. | |\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nCallback for ItemKeyedDataSource [loadBefore(LoadParams, LoadCallback)](/reference/android/arch/paging/ItemKeyedDataSource#loadBefore(android.arch.paging.ItemKeyedDataSource.LoadParams\u003cKey\u003e, android.arch.paging.ItemKeyedDataSource.LoadCallback\u003cValue\u003e))\nand [loadAfter(LoadParams, LoadCallback)](/reference/android/arch/paging/ItemKeyedDataSource#loadAfter(android.arch.paging.ItemKeyedDataSource.LoadParams\u003cKey\u003e, android.arch.paging.ItemKeyedDataSource.LoadCallback\u003cValue\u003e)) to return data.\n\n\nA callback can be called only once, and will throw if called again.\n\n\nIt is always valid for a DataSource loading method that takes a callback to stash the\ncallback and call it later. This enables DataSources to be fully asynchronous, and to handle\ntemporary, recoverable error states (such as a network error that can be retried).\n\nSummary\n-------\n\n| ### Public constructors ||\n|------------------------------------------------------------------------------------------------------------------------------------------------|---|\n| ` `[ItemKeyedDataSource.LoadCallback](/reference/android/arch/paging/ItemKeyedDataSource.LoadCallback#ItemKeyedDataSource.LoadCallback())`() ` |\n\n| ### Public methods ||\n|------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ` abstract void` | ` `[onResult](/reference/android/arch/paging/ItemKeyedDataSource.LoadCallback#onResult(java.util.List\u003cValue\u003e))`(List\u003cValue\u003e data) ` Called to pass loaded data from a DataSource. |\n\n| ### Inherited methods |\n|-----------------------|---|\n| From class ` java.lang.Object ` |-------------------|-------------------------------| | ` Object` | ` clone() ` | | ` boolean` | ` equals(Object arg0) ` | | ` void` | ` finalize() ` | | ` final Class\u003c?\u003e` | ` getClass() ` | | ` int` | ` hashCode() ` | | ` final void` | ` notify() ` | | ` final void` | ` notifyAll() ` | | ` String` | ` toString() ` | | ` final void` | ` wait(long arg0, int arg1) ` | | ` final void` | ` wait(long arg0) ` | | ` final void` | ` wait() ` | ||\n\nPublic constructors\n-------------------\n\n### ItemKeyedDataSource.LoadCallback\n\n```\nItemKeyedDataSource.LoadCallback ()\n```\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nPublic methods\n--------------\n\n### onResult\n\n```\nvoid onResult (List\u003cValue\u003e data)\n```\n\nCalled to pass loaded data from a DataSource.\n\n\nCall this method from your ItemKeyedDataSource's\n[loadBefore(LoadParams, LoadCallback)](/reference/android/arch/paging/ItemKeyedDataSource#loadBefore(android.arch.paging.ItemKeyedDataSource.LoadParams\u003cKey\u003e, android.arch.paging.ItemKeyedDataSource.LoadCallback\u003cValue\u003e)) and\n[loadAfter(LoadParams, LoadCallback)](/reference/android/arch/paging/ItemKeyedDataSource#loadAfter(android.arch.paging.ItemKeyedDataSource.LoadParams\u003cKey\u003e, android.arch.paging.ItemKeyedDataSource.LoadCallback\u003cValue\u003e)) methods to return data.\n\n\nCall this from [loadInitial(LoadInitialParams, LoadInitialCallback)](/reference/android/arch/paging/ItemKeyedDataSource#loadInitial(android.arch.paging.ItemKeyedDataSource.LoadInitialParams\u003cKey\u003e, android.arch.paging.ItemKeyedDataSource.LoadInitialCallback\u003cValue\u003e)) to\ninitialize without counting available data, or supporting placeholders.\n\n\nIt is always valid to pass a different amount of data than what is requested. Pass an\nempty list if there is no more data to load.\n\n\u003cbr /\u003e\n\n| Parameters ||\n|--------|-------------------------------------------------------------------|\n| `data` | `List`: List of items loaded from the ItemKeyedDataSource. \u003cbr /\u003e |\n\n-\n\n Interfaces\n ----------\n\n - [DataSource.InvalidatedCallback](/reference/android/arch/paging/DataSource.InvalidatedCallback)\n-\n\n Classes\n -------\n\n - [AsyncPagedListDiffer](/reference/android/arch/paging/AsyncPagedListDiffer)\n - [DataSource](/reference/android/arch/paging/DataSource)\n - [DataSource.Factory](/reference/android/arch/paging/DataSource.Factory)\n - [ItemKeyedDataSource](/reference/android/arch/paging/ItemKeyedDataSource)\n - [ItemKeyedDataSource.LoadCallback](/reference/android/arch/paging/ItemKeyedDataSource.LoadCallback)\n - [ItemKeyedDataSource.LoadInitialCallback](/reference/android/arch/paging/ItemKeyedDataSource.LoadInitialCallback)\n - [ItemKeyedDataSource.LoadInitialParams](/reference/android/arch/paging/ItemKeyedDataSource.LoadInitialParams)\n - [ItemKeyedDataSource.LoadParams](/reference/android/arch/paging/ItemKeyedDataSource.LoadParams)\n - [LivePagedListBuilder](/reference/android/arch/paging/LivePagedListBuilder)\n - [PagedList](/reference/android/arch/paging/PagedList)\n - [PagedList.BoundaryCallback](/reference/android/arch/paging/PagedList.BoundaryCallback)\n - [PagedList.Builder](/reference/android/arch/paging/PagedList.Builder)\n - [PagedList.Callback](/reference/android/arch/paging/PagedList.Callback)\n - [PagedList.Config](/reference/android/arch/paging/PagedList.Config)\n - [PagedList.Config.Builder](/reference/android/arch/paging/PagedList.Config.Builder)\n - [PagedListAdapter](/reference/android/arch/paging/PagedListAdapter)\n - [PageKeyedDataSource](/reference/android/arch/paging/PageKeyedDataSource)\n - [PageKeyedDataSource.LoadCallback](/reference/android/arch/paging/PageKeyedDataSource.LoadCallback)\n - [PageKeyedDataSource.LoadInitialCallback](/reference/android/arch/paging/PageKeyedDataSource.LoadInitialCallback)\n - [PageKeyedDataSource.LoadInitialParams](/reference/android/arch/paging/PageKeyedDataSource.LoadInitialParams)\n - [PageKeyedDataSource.LoadParams](/reference/android/arch/paging/PageKeyedDataSource.LoadParams)\n - [PositionalDataSource](/reference/android/arch/paging/PositionalDataSource)\n - [PositionalDataSource.LoadInitialCallback](/reference/android/arch/paging/PositionalDataSource.LoadInitialCallback)\n - [PositionalDataSource.LoadInitialParams](/reference/android/arch/paging/PositionalDataSource.LoadInitialParams)\n - [PositionalDataSource.LoadRangeCallback](/reference/android/arch/paging/PositionalDataSource.LoadRangeCallback)\n - [PositionalDataSource.LoadRangeParams](/reference/android/arch/paging/PositionalDataSource.LoadRangeParams)\n - [RxPagedListBuilder](/reference/android/arch/paging/RxPagedListBuilder)"]]
