转换经纬度到ESRI的ArcGIS的MapPoint [英] Convert latitude and longitude into esri arcGIS MapPoint

问题描述

我有在转换经纬度值转换成Android的ESRI ArcGIS地图点麻烦。这是我的code获得纬度和经度值从GPS坐标：

I am having trouble in converting the latitude and longitude values into android esri arcGIS map Point. Here's my code to get latitude and longitude values from GPS coordinates:

LocationManager lm;
String towers;
double lat;
double longi;
TextView txt;

            lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
            Criteria crit = new Criteria();
            towers = lm.getBestProvider(crit, false);
            Location location = lm.getLastKnownLocation(towers);

            if(location != null)
            {
                lat = location.getLatitude();
                longi = location.getLongitude();
            }

现在我有经度和纬度值。现在，我需要的是将这些值转换成有效的ESRI的ArcGIS MapPoint的。谁能帮我？

now I have the latitude and longitude values. Now all I need is to convert these values into valid esri arcGIS MapPoint. Can anyone help me?

在此先感谢。

推荐答案

是的，这是可能的。但你不使用locationmanager在ArcGIS。

Yes, it is possible. But you don't use the locationmanager in ArcGis.

ArcGIS中有一个像LocationListener的的predefined的方法，那就是： OnStatusChangedListener

ArcGIS has the predefined method like LocationListener, that is: OnStatusChangedListener.

请参阅下面的code为转换位置的经度和纬度为ESRI的ArcGIS MapPoint的。

See the below code for converting location latitude and longitude into esri arcGIS MapPoint.

     mMapView.setOnStatusChangedListener(new OnStatusChangedListener() {

            /**
             * 
             */
      private static final long serialVersionUID = 1L;

      public void onStatusChanged(Object source, STATUS status) {
      if (source == mMapView && status == STATUS.INITIALIZED) {
      LocationService ls = mMapView.getLocationService();
      ls.setAutoPan(false);
      ls.setLocationListener(new LocationListener() {

      boolean locationChanged = false;

      // Zooms to the current location when first GPS fix
      // arrives.
      public void onLocationChanged(Location loc) {
      if (!locationChanged) {
      locationChanged = true;
      double locy = loc.getLatitude();
      double locx = loc.getLongitude();
      Point wgspoint = new Point(locx, locy);
      Point mapPoint = (Point) GeometryEngine.project(wgspoint,  

      SpatialReference.create(4326),

      mMapView.getSpatialReference());

      Unit mapUnit = mMapView.getSpatialReference().getUnit();
      double zoomWidth = Unit.convertUnits(

      SEARCH_RADIUS, Unit.create(LinearUnit.Code.MILE_US), mapUnit);
      Envelope zoomExtent = new Envelope(mapPoint, zoomWidth, zoomWidth);

      mMapView.setExtent(zoomExtent);

      GraphicsLayer gLayer = new GraphicsLayer();
      PictureMarkerSymbol symbol = new     
      PictureMarkerSymbol(getResources().getDrawable(R.drawable.twiz_car_red));
      Graphic graphic = new Graphic(mapPoint, symbol);
      //Graphic point=new Graphic(new Point(x, y),new    
      SimpleMarkerSymbol(Color.CYAN,20,STYLE.CIRCLE));   
      gLayer.addGraphic(graphic);
      mMapView .addLayer(gLayer);

         }
      }

      public void onProviderDisabled(String arg0) {

            }
      public void onProviderEnabled(String arg0) {
            }

      public void onStatusChanged(String arg0, int arg1,
      Bundle arg2) {

         }
        });
      ls.start();

     }
   }
});

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