Zoom based Graphics Renderer using GraphicsOverlay

[Dhruvin]

How can I create a zoom based Graphics Renderer using the GraphicsOverlay with the Android Runtime SDK ?

I am on version 100.13.0

I want to be able to see some simple point marker when zoomed out and when I zoom close enough (passing a certain zoom threshold) to the graphic I want to display the actual graphic. 

Is there is a more automatic way to do this with a Renderer than switching out the graphic myself ?

If not possible on Android Runtime, is it possible with the Javascript api ?

Please let me know. Thanks

[RamaChintapalli]

Hi,
Yes, it is possible to create scale based symbols in Runtime. Here is a blog that explains how to create them. A sample to showcase is still in works.

Release Notes:
https://developers.arcgis.com/android/reference/release-notes/100.13/#alternate-symbol...

Blog post:
https://www.esri.com/arcgis-blog/products/api-net-win-desktop/developers/defining-scale-based-symbol...

Thanks
Rama

[Dhruvin]

Thanks Rama for this info.

When do you think the sample will be available ?

I see that the blog post is for Runtime .net api, are the api functions very similarly named in Android runtime ?

[Dhruvin]

We are using PictureMarkerSymbol for our Graphics. Our process is: VectorDrawables -> Bitmap -> PictureMarkerSymbol.

How can we use MultilayerSymbol instead of PictureMarkerSymbol?

The API documentation mentions this is only compatible with MultilayerSymbol

Thanks

[PriyankaRupani · Accepted solution]

Hi Dhruvin,

The function names should be the same in android as well. 

Also, only multilayer symbols are supported as scale-based and alternate symbols.

you can convert PictureMarkerSymbol to a MultilayerSymbol using below fucnction.

toMultilayerSymbol()

 Sample code

//Create a picture marker symbol from URI.
val pmSymbol = PictureMarkerSymbol("http://xxx/pushpin/BrownPushpin.png")
pmSymbol.height = 50f
pmSymbol.width = 50f

// Create an ArcGISMap with Light Gray Canvas basemap and set it to MapView
mapView.map = ArcGISMap(Basemap.createLightGrayCanvas())

// Create Multilayer point symbol from Picture marker symbol
val MultilayerPointSymbol = pmSymbol.toMultilayerSymbol()

// Create a graphics overlay to be identified against
val graphicsOverlay = GraphicsOverlay()
val graphic = Graphic(Point(50.0, 50.0, mapView.spatialReference),MultilayerPointSymbol)
graphicsOverlay.graphics.add(graphic)
mapView.graphicsOverlays.add(graphicsOverlay)

//Set reference properties on symbol to allow it to support alternate symbols
MultilayerPointSymbol.referenceProperties = SymbolReferenceProperties(0.0, 40_000_000.0)

 Hope this helps.