Summary: Inherited Constants | Ctors | Methods | Inherited Methods

StableIdKeyProvider

Kotlin |Java

public final class StableIdKeyProvider
extends ItemKeyProvider<Long>

java.lang.Object
↳	androidx.recyclerview.selection.ItemKeyProvider<java.lang.Long>
	↳	androidx.recyclerview.selection.StableIdKeyProvider

An ItemKeyProvider that provides stable ids by way of cached RecyclerView.Adapter stable ids. Items enter the cache as they are laid out by RecyclerView, and are removed from the cache as they are recycled.

There are trade-offs with this implementation as it necessarily auto-boxes long stable id values into Long values for use as selection keys. The core Selection API uses a parameterized key type to permit other keys (such as Strings or URIs).

Summary

Inherited constants

From class androidx.recyclerview.selection.ItemKeyProvider

`int`	`SCOPE_CACHED` Provides access to cached data based for items that were recently bound in the view.
`int`	`SCOPE_MAPPED` Provides access to all data, regardless of whether it is bound to a view or not.

Public constructors
`StableIdKeyProvider(RecyclerView recyclerView)` Creates a new key provider that uses cached `long` stable ids associated with the RecyclerView items.

Public methods
`Long`	`getKey(int position)`
`int`	`getPosition(Long key)`

Inherited methods

From class


        
          androidx.recyclerview.selection.ItemKeyProvider

`abstract Long`	`getKey(int position)`
`abstract int`	`getPosition(Long key)`

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

public StableIdKeyProvider (RecyclerView recyclerView)

Creates a new key provider that uses cached long stable ids associated with the RecyclerView items.

Parameters
`recyclerView`	`RecyclerView`: the owner RecyclerView

Public methods

getKey

public Long getKey (int position)

Parameters
`position`	`int`

Returns
`Long`	The selection key at the given adapter position, or null.

getPosition

public int getPosition (Long key)

Parameters
`key`	`Long`

Returns
`int`	the position corresponding to the selection key, or RecyclerView.NO_POSITION.