code: def show_view(self):
          
          if not self.build_info:
              def on_build_info(info):
                  """ Make sure the build info is ready before we 
                  display the view 
                  
                  """
                  self.dp = info['DISPLAY_DENSITY']
                  self.width = info['DISPLAY_WIDTH']
                  self.height = info['DISPLAY_HEIGHT']
                  self.orientation = ('square', 'portrait', 'landscape')[
                                      info['DISPLAY_ORIENTATION']]
                  self.api_level = info['SDK_INT']
                  self.build_info = info
                  self._show_view()
  
              self.init_widget()
              self.widget.getBuildInfo().then(on_build_info)
          else:
              self._show_view()
docs: Show the current `app.view`. This will fade out the previous
              with the new view.