private void changeMainVitoScaleType(ScaleType scaleType, @Nullable PointF focusPoint) {
    VitoView.show(
        mCurrentUri,
        ImageOptions.create().scale(scaleType).focusPoint(focusPoint).build(),
        CALLER_CONTEXT,
        mVitoMain);
  }
Simple Vito fragment that illustrates different scale types
samples/showcase/src/main/java/com/facebook/fresco/samples/showcase/vito/VitoScaleTypeFragment.java