Recyclerview Smoothing with listener

     pagerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
            private boolean scrollingUp;

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                // Or use dx for horizontal scrolling
                scrollingUp = dy < 0;
            }

            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                // Make sure scrolling has stopped before snapping
                if (newState == RecyclerView.SCROLL_STATE_IDLE) {
                    // layoutManager is the recyclerview's layout manager which you need to have reference in advance
                    int visiblePosition = scrollingUp ? layoutManager.findFirstVisibleItemPosition()
                            : layoutManager.findLastVisibleItemPosition();
                    int completelyVisiblePosition = scrollingUp ? layoutManager
                            .findFirstCompletelyVisibleItemPosition() : layoutManager
                            .findLastCompletelyVisibleItemPosition();
                    // Check if we need to snap
                    if (visiblePosition != completelyVisiblePosition) {
                        recyclerView.smoothScrollToPosition(visiblePosition);
                        return;
                    }

                }
            }
        });