# AudioTrack.OnPlaybackPositionUpdateListener

Added in[API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

# OnPlaybackPositionUpdateListener

*** ** * ** ***

Kotlin\|[Java](https://developer.android.com/reference/android/media/AudioTrack.OnPlaybackPositionUpdateListener "View this page in Java")  

```
interface OnPlaybackPositionUpdateListener
```

|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [android.media.AudioTrack.OnPlaybackPositionUpdateListener](https://developer.android.com/reference/kotlin/android/media/AudioTrack.OnPlaybackPositionUpdateListener#) |

Interface definition for a callback to be invoked when the playback head position of an AudioTrack has reached a notification marker or has increased by a certain period.

## Summary

|                                                                                                                                                                                                                                              Public methods                                                                                                                                                                                                                                               ||
|--------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| abstract[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onMarkerReached](https://developer.android.com/reference/kotlin/android/media/AudioTrack.OnPlaybackPositionUpdateListener#onMarkerReached(android.media.AudioTrack))`(`track:` `[AudioTrack](https://developer.android.com/reference/kotlin/android/media/AudioTrack)!`)` Called on the listener to notify it that the previously set marker has been reached by the playback head.                                |
| abstract[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onPeriodicNotification](https://developer.android.com/reference/kotlin/android/media/AudioTrack.OnPlaybackPositionUpdateListener#onPeriodicNotification(android.media.AudioTrack))`(`track:` `[AudioTrack](https://developer.android.com/reference/kotlin/android/media/AudioTrack)!`)` Called on the listener to periodically notify it that the playback head has reached a multiple of the notification period. |

## Public methods

### onMarkerReached

Added in[API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)  

```
abstract fun onMarkerReached(track: AudioTrack!): Unit
```

Called on the listener to notify it that the previously set marker has been reached by the playback head.  

### onPeriodicNotification

Added in[API level 3](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)  

```
abstract fun onPeriodicNotification(track: AudioTrack!): Unit
```

Called on the listener to periodically notify it that the playback head has reached a multiple of the notification period.