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Added in API level 20

Summary: Methods

Notification.Extender

Kotlin |Java

public static interface Notification.Extender

android.app.Notification.Extender

Known indirect subclasses

Notification.CarExtender, Notification.ProjectedExtender, Notification.TvExtender, Notification.WearableExtender

Notification.CarExtender	Helper class to add Android Auto extensions to notifications.
Notification.ProjectedExtender	Helper class to add projection-specific extensions to a notification.
Notification.TvExtender	Helper class to add Android TV extensions to notifications.
Notification.WearableExtender	Helper class to add wearable extensions to notifications.

Extender interface for use with Builder.extend. Extenders may be used to add metadata or change options on a notification builder.

Summary

Public methods
`abstract Notification.Builder`	`extend(Notification.Builder builder)` Apply this extender to a notification builder.

Public methods

extend

Added in API level 20

public abstract Notification.Builder extend (Notification.Builder builder)

Apply this extender to a notification builder.

Parameters
`builder`	`Notification.Builder`: the builder to be modified. This value cannot be `null`.

Returns
`Notification.Builder`	the build object for chaining. This value cannot be `null`.

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Last updated 2026-08-03 UTC.

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