I want to measure geodesic length and area in sceneView....
Pls provide with sample code specially for sceneView..
Have a look at https://developers.arcgis.com/java/api-reference/reference/com/esri/arcgisruntime/geometry/GeometryE...
This should answer your question.
For the line length there is a sample which shows the use of the method.
https://github.com/Esri/arcgis-runtime-samples-java/tree/main/geometry/geodesic-operations