# ZoomSuggestionOptions.ZoomCallback

public static interface **ZoomSuggestionOptions.ZoomCallback** A callback to perform zoom operation on camera.

### Public Method Summary

|---|---|
| abstract boolean | [setZoom](https://developers.google.com/android/reference/com/google/mlkit/vision/barcode/ZoomSuggestionOptions.ZoomCallback#setZoom(float))(float zoomRatio) Sets camera zoom to a given zoom ratio. |

## Public Methods

#### public abstract boolean
**setZoom** (float zoomRatio)

Sets camera zoom to a given zoom ratio.

This method will be called if a camera zoom is suggested by the library. The
callback will always execute on the main thread.

##### Parameters

| zoomRatio | The ratio camera should zoom to. |
|---|---|

##### Returns

- true if the zoom is successfully performed