Unable to cast LocationDataSource.Location to NmeaDataSource.Location

Question

When I try to cast LocationDataSource.Location to NmeaDataSource.Location I get the following error...

java.lang.ClassCastException: com.esri.arcgisruntime.location.LocationDataSource$Location cannot be cast to com.esri.arcgisruntime.location.NmeaDataSource$Location

I am wondering why this does not work?  I am using 100.8 and the documentation seems to indicate casting should be possible...

NmeaDataSource.Location (ArcGIS Runtime SDK for Android 100.8.0)

It states the following there...

---------------------------------------------------------------------------------------------------------------------------------------------------------------

* java.lang.Object
* * com.esri.arcgisruntime.location.LocationDataSource.Location
* * com.esri.arcgisruntime.location.NmeaDataSource.Location

* Enclosing class:NmeaDataSource

public static final class NmeaDataSource.Locationextends LocationDataSource.Location

---------------------------------------------------------------------------------------------------------------------------------------------------------------

Below is the code that I am using

lListener = new LocationDisplay.LocationChangedListener() {
@Override
   public void onLocationChanged(LocationDisplay.LocationChangedEvent locationChangedEvent) {
try { 
          NmeaDataSource.Location mLocation = (NmeaDataSource.Location) locationChangedEvent.getSource().getLocation();

Anonymous User · Answer

Alright, am going to assume based on lack of response that what I would like to do is not possible with this version of the Runtime SDK.  Wondering if satellite information, and other GPS values will be possible to harvest in a future version of the Runtime SDK?  Really my main point is that I would like to avoid having to use both Android and ESRI location and associated listeners.  It adds unnecessary extra overhead.

Anonymous User · Answer

Hi Mark,

Thanks for the response.  My main goal here is to be able to get the number of satellites and X/Y coordinates without having multiple location providers.  Right now I am able to grab the ESRI Location when it changes here as per the LocationDisplay.LocationChangedListener and then populate X/Y location in the widget.  However I end up getting number of satellites from Android location as you can see in the code below from the Android locationManager last known location.  I would prefer to get number of satellites from the same source via LocationDisplay.  Here is what I am currently doing and it does work just fine...

lListener = new LocationDisplay.LocationChangedListener() {
@Override
 public void onLocationChanged(LocationDisplay.LocationChangedEvent locationChangedEvent) {

double latitude = locationChangedEvent.getLocation().getPosition().getY();
              double longitude = locationChangedEvent.getLocation().getPosition().getX();
              Location androidLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

Integer sats = androidLocation.getExtras().getInt("satellites");

My thought process was that if I could cast this within the LocationChangedListener..

NmeaDataSource.Location loc = (NmeaDataSource.Location) locationChangedEvent.getSource().getLocation();

That I could then get the number of satellites as followed.

Integer sats = loc.getSatellites().size();

MarkBaird · Answer

Hi Arron,

You need to tell me exactly what you are trying to do here.

The NMEALocationDataSource class is for internal use only at the moment.  This will become a new item of functionality on a future release for high accuracy GPS devices.

If you explain what you are trying to achieve, I can guide you.

Thanks

Mark