title: Getting distance between farLat, farLng and nearLat, nearLng
body: <p>I am getting far and near LatLng as below :</p>
  
  <pre><code>mFarLeft = mMapView.getProjection().getVisibleRegion().farLeft;
  mFarRight = mMapView.getProjection().getVisibleRegion().farRight;
  mNearLeft = mMapView.getProjection().getVisibleRegion().nearLeft;
  mNearRight = mMapView.getProjection().getVisibleRegion().nearRight;
  </code></pre>
  
  <p>Now, How can I calculate the distance between this far and near points?<br>
  Is there any method available to get distance in KM and Feet?</p>