code: public static String getStreamIdFromKickflipUrl(Uri uri) {
          if (uri == null) throw new IllegalArgumentException("uri cannot be null");
          return uri.getLastPathSegment().toString();
      }
docs: Given a Kickflip.io url, return the stream id.
  <p/>
  e.g: https://kickflip.io/39df392c-4afe-4bf5-9583-acccd8212277/ returns
  "39df392c-4afe-4bf5-9583-acccd8212277"
  
  @param uri the uri to test
  @return the last path segment of the given uri, corresponding to the Kickflip {@link Stream#mStreamId}