Android.App.AppSearch.Observers Namespace

Important

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Provides callbacks, change information, and schema filters for observing changes to AppSearch data.

Classes

Name	Description
DocumentChangeInfo	Contains information about an individual change detected by an `ObserverCallback`.
ObserverSpec	Configures the types, namespaces and other properties that `ObserverCallback` instances match against.
ObserverSpec.Builder	Builder for `ObserverSpec` instances.
ObserverSpec.InterfaceConsts	Contains constants from the Java interfaces implemented by ObserverSpec.
SchemaChangeInfo	Contains information about a schema change detected by an `ObserverCallback`.

Interfaces

Name	Description
IObserverCallback	An interface which apps can implement to subscribe to notifications of changes to AppSearch data.

Remarks

Implement IObserverCallback to receive document and schema change notifications. DocumentChangeInfo identifies changed documents, and SchemaChangeInfo identifies changed schema types.

Use ObserverSpec.Builder to select schema types for an observer. An empty schema filter matches all schema types. Document changes caused by schema migration are reported as schema changes, not as individual document changes.

Android observer callback reference , document change reference, and observer specification reference.