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.

DragGestureRecognizer.OnGestureStartedListener

Page Summary

DragGestureRecognizer.OnGestureStartedListener provides callbacks when a DragGesture begins.
This interface inherits a method, onGestureStarted(), from BaseGestureRecognizer.OnGestureStartedListener, which is called when a drag gesture starts.
The onGestureStarted() method receives a DragGesture object as an argument, providing information about the gesture that just began.

public static interface DragGestureRecognizer.OnGestureStartedListener

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

abstract void

onGestureStarted(DragGesture gesture)