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(@NonNull type: Class<K>)`
open static StorageStrategy<String!>	`createStringStorage()`

StorageStrategy(@NonNull type: Class<K>)

Creates a new instance.

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

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

Creates a Bundle from supplied Selection.

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

@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.

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

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

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

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

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

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