# CancellationSignal.OnCancelListener

Added in[API level 16](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

# OnCancelListener

*** ** * ** ***

Kotlin\|[Java](https://developer.android.com/reference/android/os/CancellationSignal.OnCancelListener "View this page in Java")  

```
interface OnCancelListener
```

|--------------------------------------------------------------------------------------------------------------------------------------------------|
| [android.os.CancellationSignal.OnCancelListener](https://developer.android.com/reference/kotlin/android/os/CancellationSignal.OnCancelListener#) |

Listens for cancellation.

## Summary

|                                                                                                                                                                     Public methods                                                                                                                                                                      ||
|--------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| abstract[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onCancel](https://developer.android.com/reference/kotlin/android/os/CancellationSignal.OnCancelListener#onCancel())`()` Called when[CancellationSignal.cancel](https://developer.android.com/reference/kotlin/android/os/CancellationSignal#cancel())is invoked. |

## Public methods

### onCancel

Added in[API level 16](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)  

```
abstract fun onCancel(): Unit
```

Called when[CancellationSignal.cancel](https://developer.android.com/reference/kotlin/android/os/CancellationSignal#cancel())is invoked.