Interface Subscribable

A helper class that can be used to get and subscribe to updates on a value.

Signature

interface Subscribable<T>

Name	Optional	Constraint	Default
`T`	No

Name	Description
`get()`
`subscribe(callback)`	Allows a callback to be added. This callback will be called whenever the value is updated.
`unsubscribe(callback)`	Removes the callback from the list of subscribers. The original callback instance must be passed in as an argument.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-04-09 UTC.