# UiAutomation.OnAccessibilityEventListener

Added in[API level 18](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

# OnAccessibilityEventListener

*** ** * ** ***

Kotlin\|[Java](https://developer.android.com/reference/android/app/UiAutomation.OnAccessibilityEventListener "View this page in Java")  

```
interface OnAccessibilityEventListener
```

|----------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [android.app.UiAutomation.OnAccessibilityEventListener](https://developer.android.com/reference/kotlin/android/app/UiAutomation.OnAccessibilityEventListener#) |

Listener for observing the[AccessibilityEvent](https://developer.android.com/reference/kotlin/android/view/accessibility/AccessibilityEvent.html#)stream.

## Summary

|                                                                                                                                                                                                                                                                                  Public methods                                                                                                                                                                                                                                                                                   ||
|--------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| abstract[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onAccessibilityEvent](https://developer.android.com/reference/kotlin/android/app/UiAutomation.OnAccessibilityEventListener#onAccessibilityEvent(android.view.accessibility.AccessibilityEvent))`(`event:` `[AccessibilityEvent](https://developer.android.com/reference/kotlin/android/view/accessibility/AccessibilityEvent.html#)!`)` Callback for receiving an[AccessibilityEvent](https://developer.android.com/reference/kotlin/android/view/accessibility/AccessibilityEvent.html#). |

## Public methods

### onAccessibilityEvent

Added in[API level 18](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)  

```
abstract fun onAccessibilityEvent(event: AccessibilityEvent!): Unit
```

Callback for receiving an[AccessibilityEvent](https://developer.android.com/reference/kotlin/android/view/accessibility/AccessibilityEvent.html#).

**Note:** This method is**NOT**executed on the main test thread. The client is responsible for proper synchronization.

**Note:**It is responsibility of the client to recycle the received events to minimize object creation.

|                                                                       Parameters                                                                       ||
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| `event` | [AccessibilityEvent](https://developer.android.com/reference/kotlin/android/view/accessibility/AccessibilityEvent.html#)!:The received event. |