Question

I have a ListView that is bound to a data adapter that displays distances of fixed landmarks after I create and load my location object with the device’s geoloc (lat/long). The problem is, on average, the code below takes 3-7 seconds to load, the longer process is the call “requestLocationUpdates()” which sometimes can take minutes to load if there is no NETWORK_SERVICE and the GPS_SERVICE becomes the primary, making my Activity ListView blank

Is the OnCreate() Activity method the best place for requestLocationUpdates() to be called?

locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locationListener = new GeoLocationListener();

    Criteria criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_FINE);
    criteria.setAltitudeRequired(false);
    criteria.setBearingRequired(false);
    criteria.setCostAllowed(false);
    criteria.setSpeedRequired(false);
    criteria.setPowerRequirement(Criteria.POWER_LOW);

    String provider = locationManager.getBestProvider(criteria, true);        

    locationManager.requestLocationUpdates(provider,
        0, //300000, // TODO: Default to Check Every 5 Minutes OR
            0, //500,   // TODO: Default to Check if device moves more than 500 meters
            locationListener); 

Answer 1

Use getLastKnownLocation first to display the latest known location in the list view to avoid showing empty list then call requestLocationUpdates, I can’t see any problem reagrding calling it in the onCreate method.