MapView MyLocationOverlay First Run issue

Issue

I use location services in my app. If I send longitude and latitude to emulator via DDMS, blue dot animate to there. But if I close the app and restart again, blue dot doesn't seem. If you see blue dot, you have to send new longitude and latitude. I want to show blue dot every time when app start.

What can I do ?

onCreate:

mc = mapView.getController();
        mapView.setBuiltInZoomControls(true);
        mc.setZoom(15);
        myLocOverlay = new MyLocationOverlay(this, mapView);
        mapView.getOverlays().add(myLocOverlay); 
        myLocOverlay.runOnFirstFix(new Runnable() {
            public void run() {
                mc.animateTo(myLocOverlay.getMyLocation());
                }
        });

        mapView.postInvalidate();

lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
        Criteria criteria = new Criteria();       
        provider = lm.getBestProvider(criteria, false);

        Location location = lm.getLastKnownLocation(provider);

        if (location != null) {
            onLocationChanged(location);
            }

onLocationChanged(Location location)

String PK="";

        double lat = location.getLatitude();
        double lng = location.getLongitude();
        Geocoder gc = new Geocoder(this,Locale.getDefault());
        try{

            List<Address> adresler = gc.getFromLocation(lat, lng, 1);
            StringBuilder sb = new StringBuilder();
            if(adresler.size()>0){
                Address adres = adresler.get(0);
                boolean sayi = false;
                for(int i=0;i<adres.getMaxAddressLineIndex();i++){
                    if(i!=2){
                        sb.append(adres.getAddressLine(i)).append("\n");
                    }
                    else{
                        String full = adres.getAddressLine(i).toString();
                        char chars[] = full.toCharArray();
                        for(int k=0;k<chars.length;k++){
                            sayi = Character.isDigit(chars[k]);
                            if(sayi){
                                PK=PK+chars[k];
                            }
                        }
                    }

                }   
                adresString = sb.toString();
                new gpsYerBilgisiAS(PK).execute();
            }
        }
            catch(IOException e){

            }
        }

onResume and onPause

@Override   
    protected void onResume() {  
        super.onResume();  
        lm.requestLocationUpdates(provider, 400, 1, this);      
        myLocOverlay.enableMyLocation();

    }
    @Override   
    protected void onPause() {    
        super.onPause();
        lm.removeUpdates(this); 
        myLocOverlay.disableMyLocation();
    }

Solution

In emulator, you have to send position each time you want to call onLocationChanged method. On device, it's automatically done if GPS is open. But i will only display "blue dot" when your device receives a location data via GPS or network.

Answered By - Serdar Samancıoğlu