Boolean: The direction of the zoom: true to zoom in, false to zoom out.
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Last updated 2025-02-10 UTC.
[null,null,["Last updated 2025-02-10 UTC."],[],[],null,["# ZoomButtonsController.OnZoomListener\n\nAdded in [API level 4](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \nDeprecated in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)\n\nOnZoomListener\n==============\n\n*** ** * ** ***\n\nKotlin \\|[Java](/reference/android/widget/ZoomButtonsController.OnZoomListener \"View this page in Java\") \n\n```\ninterface OnZoomListener\n```\n\n|----------------------------------------------------------|\n| [android.widget.ZoomButtonsController.OnZoomListener](#) |\n\n*** ** * ** ***\n\n| **This interface was deprecated in API level 29.**\n|\n| Deprecated in Java.\n\nInterface that will be called when the user performs an interaction that triggers some action, for example zooming.\n\nSummary\n-------\n\n| Public methods ||\n|---------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| abstract [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onVisibilityChanged](#onVisibilityChanged(kotlin.Boolean))`(`visible:` `[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)`)` Called when the zoom controls' visibility changes. |\n| abstract [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onZoom](#onZoom(kotlin.Boolean))`(`zoomIn:` `[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)`)` Called when the owner view needs to be zoomed. |\n\nPublic methods\n--------------\n\n### onVisibilityChanged\n\nAdded in [API level 4](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \n\n```\nabstract fun onVisibilityChanged(visible: Boolean): Unit\n```\n\n**Deprecated:** *Deprecated in Java.*\n\nCalled when the zoom controls' visibility changes.\n\n| Parameters ||\n|-----------|----------------------------------------------------------------------------------------------------------------------------|\n| `visible` | [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html): Whether the zoom controls are visible. |\n\n### onZoom\n\nAdded in [API level 4](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) \n\n```\nabstract fun onZoom(zoomIn: Boolean): Unit\n```\n\n**Deprecated:** *Deprecated in Java.*\n\nCalled when the owner view needs to be zoomed.\n\n| Parameters ||\n|----------|----------------------------------------------------------------------------------------------------------------------------------------------------|\n| `zoomIn` | [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html): The direction of the zoom: true to zoom in, false to zoom out. |"]]
