StorageStrategy

Kotlin |Java

abstract class StorageStrategy<K : Any!>

kotlin.Any
↳	androidx.recyclerview.selection.StorageStrategy

Strategy for storing keys in saved state. Extend this class when using custom key types that aren't supported by default. Prefer use of builtin storage strategies: createStringStorage(), createLongStorage(), createParcelableStorage(Class).

See SelectionTracker.Builder for more detailed advice on which key type to use for your selection keys.

Summary

Public constructors
<init>(@NonNull type: Class<K>) Creates a new instance.

Public methods
abstract Bundle	asBundle(@NonNull selection: Selection<K>) Creates a Bundle from supplied Selection.
abstract Selection<K>?	asSelection(@NonNull state: Bundle) Create a Selection from supplied Bundle.
open static StorageStrategy<Long!>!	createLongStorage()
open static StorageStrategy<K>!	createParcelableStorage(type: Class<K>!)
open static StorageStrategy<String!>!	createStringStorage()

Public constructors

<init>

StorageStrategy(@NonNull type: Class<K>)

Creates a new instance.

Parameters
type	Class<K>: the key type class that is being used.

Public methods

asBundle

@NonNull abstract fun asBundle(@NonNull selection: Selection<K>): Bundle

Creates a Bundle from supplied Selection.

Parameters
selection	Selection<K>: The selection to asBundle.

Return
Bundle:

asSelection

@Nullable abstract fun asSelection(@NonNull state: Bundle): Selection<K>?

Create a Selection from supplied Bundle.

Parameters
state	Bundle: Bundle instance that may contain parceled Selection instance.

Return
Selection<K>?:

createLongStorage

open static fun createLongStorage(): StorageStrategy<Long!>!

Return
StorageStrategy<Long!>!: StorageStrategy suitable for use with Long keys.

createParcelableStorage

open static fun <K : Parcelable!> createParcelableStorage(type: Class<K>!): StorageStrategy<K>!

Return
StorageStrategy<K>!: StorageStrategy suitable for use with Parcelable keys (like android.net.Uri).

createStringStorage

open static fun createStringStorage(): StorageStrategy<String!>!

Return
StorageStrategy<String!>!: StorageStrategy suitable for use with String keys.