Similar to the new CSVLayer, I'd like to create a layer from a JSON webservice (has lat/lon for points). What are my options? GraphicsLayer? FeatureLayer?
I'd like to create a layer from [some data]. What are my options? GraphicsLayer? FeatureLayer?
Yes (both). Or a custom layer that extends either of those. Using a FeatureLayer and it's feature collection is probably one of the first options you should look into. There's a sample for that: http://resources.arcgis.com/en/help/flex-api/samples/index.html#/Time_rendered_5K_run_gpx/01nq000000... That specific sample also deals with time-awareness, but if you simplify it and parse your json instead of gpx, you should be able to get your json point data onto the map.
