title: getlastknownlocation always return null after I re-install the apk file via eclipse
body: <p>Recently, I created a simple application to get the gps location and display on android phone.
  At beginning I able to get the location after few try, but after i re-install the apk file, the getLastKnownLocation() always return a null value.</p>
  
  <p>Development environment used:
  - API 10 gingerbread 2.3.6
  - GPS provider is used</p>
  
  <p>below is the code i applied in my android project:</p>
  
  <pre><code>        public class MyActivity extends MapActivity{
  protected void onCreate(Bundle savedInstanceState) {
  
  
      mapView = (MapView)findViewById(R.id.myTripMap);
      mapController = mapView.getController();
      mapView.setSatellite(false);
      mapView.setStreetView(true);
      mapView.displayZoomControls(false);
      mapView.setBuiltInZoomControls(true);//
      mapView.setClickable(true);
      mapController.setZoom(14);      
  
  
      Criteria criteria = new Criteria();
      criteria.setAccuracy(Criteria.ACCURACY_FINE);
      criteria.setAltitudeRequired(false);
      criteria.setBearingRequired(false);
      criteria.setCostAllowed(true);
      criteria.setPowerRequirement(Criteria.POWER_LOW);
      provider = locationManager.getBestProvider(criteria, true);
      location = locationManager.getLastKnownLocation(provider);
  
      updateMyCurrentLoc(location);
  
      locationManager.requestLocationUpdates(provider, 2, 1,locationListener);
  
  
  
  }
  
  
            private final LocationListener locationListener = new LocationListener() {
          public void onLocationChanged(Location location) {
            updateMyCurrentLoc(location);
          }
  
          public void onProviderDisabled(String provider){
            updateMyCurrentLoc(null);
          }
  
          public void onProviderEnabled(String provider){ }
          public void onStatusChanged(String provider, int status, 
                                      Bundle extras){ }
        };
  
  
        private void updateMyCurrentLoc(Location location) {
  
  
  
              if (location != null) {
  
               // other codes to get the address and display
              Toast.makeText(getBaseContext(), "provider used : "+provider).show();   //testing purpose
              } 
              else {
                str = "No location found";
                Toast.makeText(getBaseContext(), str, Toast.LENGTH_SHORT).show();
              }
  
          }
      }
  </code></pre>
  
  <p>Can anyone suggest a possible solution to solve the null value returned by getLastKnownLocation()?
  Any helps will be appreciated. Thanks.</p>