litho-widget/com.facebook.litho.widget/LithoCollectionItem

LithoCollectionItem

class LithoCollectionItem(componentContext: ComponentContext, id: Int = LithoTree.generateComponentTreeId(), viewType: Int = DEFAULT_COMPONENT_VIEW_TYPE, renderInfo: RenderInfo) : CollectionItem<LithoRenderTreeView>

A CollectionItem that renders a LithoRenderTreeView.

Constructors

LithoCollectionItem

constructor(componentContext: ComponentContext, id: Int = LithoTree.generateComponentTreeId(), viewType: Int = DEFAULT_COMPONENT_VIEW_TYPE, renderInfo: RenderInfo)

Types

Companion

object Companion

Properties

val id: Int

The unique identifier for this item in the RecyclerView.Adapter

renderInfo

var renderInfo: RenderInfo

Contains information about how to render this item

size

open override val size: Size?

Returns the size of this collection item.

sizeConstraints

open override val sizeConstraints: SizeConstraints?

Returns the size constraints that define the measurement boundaries for this collection item. These constraints specify the minimum and maximum width and height values that should be used when measuring and laying out the item.

viewType

val viewType: Int

The type identifier used for this item in the RecyclerView.Adapter

Functions

areSizeConstraintsCompatible

fun CollectionItem<*>.areSizeConstraintsCompatible(constraints: SizeConstraints): Boolean

Checks if the provided size constraints are compatible with this CollectionItem's current size constraints and measured size.

measure

open override fun measure(sizeConstraints: SizeConstraints, result: IntArray?)

Measures the item according to the given size constraints.

onBindView

open override fun onBindView(view: LithoRenderTreeView, sizeConstraints: SizeConstraints)

Binds data and properties to the view when it's being displayed in the collection. This method is called when the RecyclerView needs to display the item at a specific position.

onViewRecycled

open override fun onViewRecycled(view: LithoRenderTreeView)

Called when a view has been recycled and is no longer being displayed in the collection. This method should clean up any resources, listeners, or bindings associated with the view to prevent memory leaks and ensure proper recycling behavior.

prepare

open override fun prepare(sizeConstraints: SizeConstraints)

To prepare the item for rendering in async way. This is going to be used in the range preparation.

prepareSync

open override fun prepareSync(sizeConstraints: SizeConstraints, result: IntArray?)

To prepare the item for rendering in sync way.

unprepare

open override fun unprepare()

To unprepare the item, which is called after the item is being released by the range preparation.