how to use collector for arcgis

ESRI provides APIs for iOS, Android, and Windows phones. GIS developers need to use different ArcGIS mobile APIs to develop the same Mobile GIS application for different platforms, this not only increases development costs, increases development difficulty, but also wastes resources and manpower. So can applications be applied to various mobile terminals at one time? Although mobile Web applications have

Here's a series of ways to set the map extent and how to get the map extent.If you do not set the map extent when you initialize the map, the default settings information will be used, which will be the extent of the map displayed when you last saved the map document you are using. If you use multiple layers, or a service, the default map extent will be the extent information for the BASEMAP or the first layer.To set the map extent,

feature of the elements is added to the front-end page. If the elements come from the ArcSDE database, you can also synchronize them with the new database to the back-end. Ii. Background code The backend mainly implements query. When querying, querytask specifies the query layer and declares the query task. querytask receives the query parameters through the executeasync method, starts the query, and returns the query results through the querycompleted event. Query specifies the query condition