Sceneform SDK for Android was open sourced and archived (github.com/google-ar/sceneform-android-sdk) with version 1.16.0.
This site (developers.google.com/sceneform) serves as the documentation archive for the previous version, Sceneform SDK for Android 1.15.0.
Do not use version 1.17.0 of the Sceneform Maven artifacts.
The 1.17.1 Maven artifacts can be used. Other than the version, however, the 1.17.1 artifacts are identical to the 1.15.0 artifacts.

PinchGestureRecognizer.OnGestureStartedListener

Page Summary

PinchGestureRecognizer.OnGestureStartedListener defines callbacks that are triggered when a PinchGesture begins.
It inherits methods from BaseGestureRecognizer.OnGestureStartedListener, including onGestureStarted(), which is called when a PinchGesture starts.
The onGestureStarted() method provides access to the PinchGesture object, allowing developers to respond to the gesture.

public static interface PinchGestureRecognizer.OnGestureStartedListener

Interface definition for a callbacks to be invoked when a PinchGesture starts.

abstract void

onGestureStarted(PinchGesture gesture)