RecyclerView.AdapterDataObserver

Artifact: androidx.recyclerview:recyclerview

View Source

Added in 1.0.0

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Kotlin |Java

abstract class RecyclerView.AdapterDataObserver

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Observer base class for watching changes to an Adapter. See registerAdapterDataObserver.

Summary

Public constructors
AdapterDataObserver()

Public functions
Unit	onChanged()
Unit	onItemRangeChanged(positionStart: Int, itemCount: Int)
Unit	onItemRangeChanged(positionStart: Int, itemCount: Int, payload: Any?)
Unit	onItemRangeInserted(positionStart: Int, itemCount: Int)
Unit	onItemRangeMoved(fromPosition: Int, toPosition: Int, itemCount: Int)
Unit	onItemRangeRemoved(positionStart: Int, itemCount: Int)
Unit	onStateRestorationPolicyChanged() Called when the Adapter.StateRestorationPolicy of the Adapter changed.

Public constructors

AdapterDataObserver

Added in 1.0.0

AdapterDataObserver()

Public functions

onChanged

Added in 1.0.0

fun onChanged(): Unit

onItemRangeChanged

Added in 1.0.0

fun onItemRangeChanged(positionStart: Int, itemCount: Int): Unit

onItemRangeChanged

Added in 1.0.0

fun onItemRangeChanged(positionStart: Int, itemCount: Int, payload: Any?): Unit

onItemRangeInserted

Added in 1.0.0

fun onItemRangeInserted(positionStart: Int, itemCount: Int): Unit

onItemRangeMoved

Added in 1.0.0

fun onItemRangeMoved(fromPosition: Int, toPosition: Int, itemCount: Int): Unit

onItemRangeRemoved

Added in 1.0.0

fun onItemRangeRemoved(positionStart: Int, itemCount: Int): Unit

onStateRestorationPolicyChanged

Added in 1.2.0

fun onStateRestorationPolicyChanged(): Unit

Called when the Adapter.StateRestorationPolicy of the Adapter changed. When this method is called, the Adapter might be ready to restore its state if it has not already been restored.

See also
getStateRestorationPolicy
setStateRestorationPolicy