title: GPS is not enabled but isProviderEnabled() is returning true
body: <p>I can check if GPS is on or not using isProviderEnabled(). If it is not on, I am launching intent so that user can enable GPS. 
  At the end I am again checking if GPS is enabled by user or not.
  If user does not enable GPS and come out, still isProviderEnabled() is returning NULL.
  What could be the issue ? Please guide me.</p>
  
  <pre><code>    String provider = LocationManager.GPS_PROVIDER;
      // Check if GPS is enabled
      boolean enabled = myLocationManager.isProviderEnabled(provider);
  
      if (!enabled) {
                      // GPS not enabled
          Log.d("", "Provider " + provider + " is not enabled");
          Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
          startActivity(intent);
                      // Consider the case when user does not enable GPS and come out. 
      } else {
          Log.d("", "Provider is enabled");
  
      }       
  
              // Re-check if user has enabled or not. (Note: case: user has not enabled GPS)
      enabled = myLocationManager.isProviderEnabled(provider);
      if(!enabled)
      {
  
          Log.d("","provider not enabled");
      }
              else
              {
                      // Control is coming here though user has not enabled GPS in settings
                      Log.d("","GPS is enabled");
              }
  </code></pre>
  
  <p>Thanks,
  Biplab</p>