I am just starting out on my first mobile application and upgraded from Flex 2.5 to 3. I was using some of the code from the Basic Map Enhanced GPS made by TOVernon to show current location reprojected to the map coordinates. The code worked great in Flex 2.5. When upgrading from Flex 2.5 to 3 I get an error in the geolocation event listener. I get the following errors:Multiple markers at this line:-1067: Implicit coercion of a value of type Array to an unrelated type com.esri.ags.tasks.supportClasses:ProjectParameters.-1067: Implicit coercion of a value of type com.esri.ags:SpatialReference to an unrelated type mx.rpc:IResponder. <fx:Script>
<![CDATA[
import com.esri.ags.Graphic;
import com.esri.ags.events.ExtentEvent;
import com.esri.ags.events.GeometryServiceEvent;
import com.esri.ags.events.MapEvent;
import com.esri.ags.geometry.Geometry;
import com.esri.ags.geometry.MapPoint;
import com.esri.ags.geometry.Polygon;
import com.esri.ags.symbols.PictureMarkerSymbol;
import com.esri.ags.tasks.supportClasses.BufferParameters;
import com.esri.ags.utils.WebMercatorUtil;
import flash.sensors.Geolocation;
[Embed(source="/assets/gpsA.png")]
private var m_gpsA:Class;
[Embed(source="/assets/gpsB.png")]
private var m_gpsB:Class;
private var GPSPoint:MapPoint;
private var pt:MapPoint;
private var geo:Geolocation;
//Load GPS icon if GPS is present
protected function myMap_loadHandler(event:MapEvent):void
{
if (Geolocation.isSupported==true)
{
//Initialize the location sensor.
geo = new Geolocation;
//set update interval
geo.setRequestedUpdateInterval(5000);
//add GPS toggle button
zoomToCurrentLocationImg.source = m_gpsA;
zoomToCurrentLocationImg.visible = true;
}
else
{
//do not show a GPS Icon
}
}
//activate the GPS
protected function locateGPS(event:MouseEvent):void
{
if (myGraphicsLayer.numGraphics > 0)
{
myGraphicsLayer.clear();
GPSGraphicsLayer.clear();
accBorder.visible = false;
zoomToCurrentLocationImg.source = m_gpsA;
geo.removeEventListener(GeolocationEvent.UPDATE, onUpdate);
}
else
{
zoomToCurrentLocationImg.source = m_gpsB;
geo.addEventListener(GeolocationEvent.UPDATE, onUpdate);
}
}
//geolocation event listener
private function onUpdate(event:GeolocationEvent):void
{
var long:String = event.longitude.toString();
var lat:String = event.latitude.toString();
var ha:Number = event.horizontalAccuracy;
accText.text = ha.toString();
var longnew:Number = Number(long);
var latnew:Number = Number(lat);
var GPSPoint:MapPoint = new MapPoint(longnew, latnew);
GPSPoint.spatialReference = new SpatialReference(4326);
var outSR:SpatialReference = myMap.spatialReference;
geometryService.project([GPSPoint as Geometry], outSR);
}
//reproject event
private function projectCompleteHandler(event:GeometryServiceEvent):void
{
try
{
// Note: As of version 2.0, GeometryService returns geometries (instead of graphics)
var pt:MapPoint = (event.result as Array)[0]as MapPoint;
var ptGraphic:Graphic = new Graphic(null,GPSicon);
ptGraphic.geometry = pt;
myGraphicsLayer.clear()
GPSGraphicsLayer.clear()
accBorder.visible = true;
myGraphicsLayer.add(ptGraphic);
//add buffer code for GPS horizontal accuracy
var bufferParameters:BufferParameters = new BufferParameters();
bufferParameters.geometries = [ pt ];
bufferParameters.distances = [ accText.text ];
bufferParameters.unit = GeometryService.UNIT_FOOT;
bufferParameters.bufferSpatialReference = myMap.spatialReference;
bufferParameters.outSpatialReference = myMap.spatialReference;
geometryService.addEventListener(GeometryServiceEvent.BUFFER_COMPLETE, bufferCompleteHandler);
geometryService.buffer(bufferParameters);
function bufferCompleteHandler(event:GeometryServiceEvent):void
{
geometryService.removeEventListener(GeometryServiceEvent.BUFFER_COMPLETE, bufferCompleteHandler);
// Note: As of version 2.0, GeometryService returns geometries (instead of graphics)
for each (var geometry:Polygon in event.result)
{
var graphic:Graphic = new Graphic();
graphic.geometry = geometry;
graphic.symbol = fillSymbol;
GPSGraphicsLayer.add(graphic);
}
}
if (zoomToCurrentLocationImg.source == m_gpsB)
{
myMap.centerAt(pt)
}
else
{
// geo.removeEventListener(GeolocationEvent.UPDATE, onUpdate);
// myGraphicsLayer.clear();
GPSGraphicsLayer.clear();
}
}
catch (error:Error)
{
//Alert.show(error.toString());
}
}
]]>
</fx:Script>
<fx:Declarations>
<!--GPS accuracy Polygon-->
<esri:SimpleFillSymbol id="fillSymbol" color="0x81BEF7" alpha=".5">
<esri:outline>
<esri:SimpleLineSymbol width="2" color="0x0040FF"/>
</esri:outline>
</esri:SimpleFillSymbol>
<!--GPS icon-->
<esri:PictureMarkerSymbol id="GPSicon" source="@Embed(source='assets/gps.png')"/>
<s:Fade id="fade" alphaFrom="1" alphaTo="0" duration="1500"/>
<esri:GeometryService id="geometryService" showBusyCursor="false" projectComplete="projectCompleteHandler(event)"
url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer"/>
</fx:Declarations> Any help would be greatly appreciated.
