Added in API level 1

DataSetObservable

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Kotlin |Java

open class DataSetObservable : Observable<DataSetObserver!>

kotlin.Any
↳	android.database.Observable<android.database.DataSetObserver>
	↳	android.database.DataSetObservable

A specialization of Observable for DataSetObserver that provides methods for sending notifications to a list of DataSetObserver objects.

Summary

Public constructors
DataSetObservable()

Public methods
open Unit	notifyChanged() Invokes DataSetObserver.onChanged on each observer.
open Unit	notifyInvalidated() Invokes DataSetObserver.onInvalidated on each observer.

Inherited functions
From class Observable Unit registerObserver(observer: T) Adds an observer to the list. The observer cannot be null and it must not already be registered. Unit unregisterAll() Remove all registered observers. Unit unregisterObserver(observer: T) Removes a previously registered observer. The observer must not be null and it must already have been registered.

Inherited properties
From class Observable ArrayList<T>! mObservers The list of observers. An observer can be in the list at most once and will never be null.

Public constructors

DataSetObservable

DataSetObservable()

Public methods

notifyChanged

Added in API level 1

open fun notifyChanged(): Unit

Invokes DataSetObserver.onChanged on each observer. Called when the contents of the data set have changed. The recipient will obtain the new contents the next time it queries the data set.

notifyInvalidated

Added in API level 1

open fun notifyInvalidated(): Unit

Invokes DataSetObserver.onInvalidated on each observer. Called when the data set is no longer valid and cannot be queried again, such as when the data set has been closed.