title: MBTiles maps not working in OSMDroid
body: <p>I am trying to make an application that relies on offline maps. Openstreet maps became my choice as OSMDroid seems to be used quite heavily. However when I tried it with the offline maps (MBTiles generated using Mobile Atlas creator) the "MapView" class does not display any map on my device. Here is the snippet that lives inside a fragment. I do not see logcat throwing any errors either </p>
  
  <pre><code>        public void onActivityCreated(Bundle savedInstanceState) {
          // TODO Auto-generated method stub
          super.onActivityCreated(savedInstanceState);
              String [] url = {"http://example.org/"};
              XYTileSource MBTILESRENDER = new XYTileSource("mbtiles", 
                                      ResourceProxy.string.offline_mode, 
                                      1, 20, 256, 
                                      ".png", 
                                      url);
              DefaultResourceProxyImpl mResourceProxy = new DefaultResourceProxyImpl(getActivity());
              SimpleRegisterReceiver simpleReceiver = new SimpleRegisterReceiver(getActivity());
  
              File f = new File(Environment.getExternalStorageDirectory(), "osmdroid/srMbTiles.mbtiles");
  
              Log.e("File  ", f.toString() + " PATH:" + f.getAbsolutePath());
              if ( f.exists() ) {
                  Log.d("DEBUG", " #### FIle  Exists");
              }
              IArchiveFile[] files = { MBTilesFileArchive.getDatabaseFileArchive(f) };
  
              MapTileModuleProviderBase moduleProvider = new MapTileFileArchiveProvider(simpleReceiver, MBTILESRENDER, files);
  
              MapTileProviderArray mProvider = new MapTileProviderArray(MBTILESRENDER, null, new MapTileModuleProviderBase[] { moduleProvider });
  
              myOpenMapView = new MapView(getActivity(), 
                      256,mResourceProxy, mProvider);         
  
              myOpenMapView.setBuiltInZoomControls(true);
              myOpenMapView.setTileSource(MBTILESRENDER);
              IMapController controller = (IMapController) myOpenMapView.getController();
              controller.setZoom(12);
          getActivity().setContentView(myOpenMapView);
      }
  </code></pre>
  
  <p>Any help would be greatly appreciated. Thanks in advance</p>