recyclerview/androidx.recyclerview.widget/SortedList/Callback

Callback

abstract class Callback<T2> : Comparator<T> , ListUpdateCallback(source)

The class that controls the behavior of the SortedList.

It defines how items should be sorted and how duplicates should be handled.

SortedList calls the callback methods on this class to notify changes about the underlying data.

Inheritors

SortedListAdapterCallback

BatchedCallback

SortedListAdapterCallback

BatchedCallback

Constructors

constructor()

Functions

areContentsTheSame

abstract fun areContentsTheSame(oldItem: T2, newItem: T2): Boolean

Called by the SortedList when it wants to check whether two items have the same data or not.

areItemsTheSame

abstract fun areItemsTheSame(item1: T2, item2: T2): Boolean

Called by the SortedList to decide whether two objects represent the same Item or not.

abstract fun compare(o1: T2, o2: T2): Int

Similar to compare, should compare two and return how they should be ordered.

getChangePayload

open fun getChangePayload(item1: T2, item2: T2): Any

When areItemsTheSame returns true for two items and areContentsTheSame returns false for them, Callback calls this method to get a payload about the change.

abstract fun onChanged(position: Int, count: Int)

Called by the SortedList when the item at the given position is updated.

open fun onChanged(position: Int, count: Int, payload: Any)

Called when count} number of items are updated at the given position.