topic Re: Custom Featurelayer in ArcGIS Runtime SDK for Android Questions

Custom Featurelayer

mavenmaven — Mon, 31 Mar 2014 09:59:36 GMT

Hi:

We have some POIs which we want to add them to the maps as a kind of Layer.

In face, this is similar to ArcGISFeatureLayer, while the server does not hold a ArcgisFeatureService but a common web service, we can parse the data ourselves.

I wonder if this is possible?

Re: Custom Featurelayer

ShellyGill1 — Tue, 01 Apr 2014 08:33:00 GMT

Perhaps you don't really need a custom Layer, as the GraphicsLayer might do everything you need. Take a look at this sample that converts a CSV file to a GraphicsLayer in a map by connecting to a URL, parsing the CSV file that contains coordinates and attributes into Graphic objects, adds these Graphics to a GraphicsLayer and adds the layer to a map:

http://developers.arcgis.com/android/sample-code/addcsv-file/

Whether this is suitable or not depends on what kind of functionality you need in the layer really - you can add and remove graphics, change graphics, change visibility, and get graphics based on screen coordinates. See the JavaDoc for more info:

https://developers.arcgis.com/android/api-reference/reference/com/esri/android/map/GraphicsLayer.html

Re: Custom Featurelayer

mavenmaven — Thu, 03 Apr 2014 04:19:05 GMT

That's not what I want.

First, it load all the csv data one time, but we have too many records, it is not a good idea to load all of them once.

Second, load all the record out side the viewport of the mapview is a waste of network and memory.

The ArcgisFeatureLayer seems load features on demand. Is it possible?