# RecoverySystem.ProgressListener

Added in[API level 8](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

# ProgressListener

*** ** * ** ***

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

```
interface ProgressListener
```

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

Interface definition for a callback to be invoked regularly as verification proceeds.

## Summary

|                                                                                                                                                                            Public methods                                                                                                                                                                            ||
|--------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| abstract[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onProgress](https://developer.android.com/reference/kotlin/android/os/RecoverySystem.ProgressListener#onProgress(kotlin.Int))`(`progress:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)` Called periodically as the verification progresses. |

## Public methods

### onProgress

Added in[API level 8](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)  

```
abstract fun onProgress(progress: Int): Unit
```

Called periodically as the verification progresses.

|                                                                                            Parameters                                                                                             ||
|------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `progress` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html):the approximate percentage of the verification that has been completed, ranging from 0 to 100 (inclusive). |