@Override
          public void onAnimationEnd(Animator animation) {
            draweeView.getHierarchy().setActualImageScaleType(mToScale);
            if (mToFocusPoint != null) {
              draweeView.getHierarchy().setActualImageFocusPoint(mToFocusPoint);
            }
          }
This Transition animates changes of {@link GenericDraweeView} between two ScaleTypes

<p>In combination with ChangeBounds, DraweeTransition allows GenericDraweeViews that change size,
shape, or {@link ScalingUtils.ScaleType} to animate contents smoothly.
drawee/src/main/java/com/facebook/drawee/view/DraweeTransition.java