public RecyclerViewSkeletonScreen show() {
            RecyclerViewSkeletonScreen recyclerViewSkeleton = new RecyclerViewSkeletonScreen(this);
            recyclerViewSkeleton.show();
            return recyclerViewSkeleton;
        }
@param frozen whether frozen recyclerView during skeleton showing
@return
subs/skeleton/src/main/java/com/ethanhua/skeleton/RecyclerViewSkeletonScreen.java