Added in [API level 20](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Methods](https://developer.android.com/reference/android/app/Notification.Action.Extender#pubmethods)

# Notification.Action.Extender

*** ** * ** ***

` public static interface Notification.Action.Extender `   
` `

|---|
| android.app.Notification.Action.Extender |

Known indirect subclasses [Notification.Action.WearableExtender](https://developer.android.com/reference/android/app/Notification.Action.WearableExtender) [Notification.Action.WearableExtender](https://developer.android.com/reference/android/app/Notification.Action.WearableExtender) Wearable extender for notification actions.   

*** ** * ** ***

Extender interface for use with `https://developer.android.com/reference/android/app/Notification.Action.Builder#extend(android.app.Notification.Action.Extender)`. Extenders may be used to add metadata or change options on an action builder.

## Summary

| ### Public methods ||
|---|---|
| ` abstract https://developer.android.com/reference/android/app/Notification.Action.Builder` | ` https://developer.android.com/reference/android/app/Notification.Action.Extender#extend(android.app.Notification.Action.Builder)(https://developer.android.com/reference/android/app/Notification.Action.Builder builder) ` Apply this extender to a notification action builder. |

## Public methods

### extend

Added in [API level 20](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

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

Apply this extender to a notification action builder.

<br />

| Parameters ||
|---|---|
| `builder` | `Notification.Action.Builder`: the builder to be modified <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/app/Notification.Action.Builder` | the build object for chaining <br /> |