listener to get notified using LinearSnapHelper with RecyclerView

RecyclerViewSnapListener.java

private void attachSnapHelper(RecyclerView recyclerView, final RecyclerView.LayoutManager layoutManager) {
    final SnapHelper snapHelper = new LinearSnapHelper();

    recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        boolean mScrolled = false;
        int snapPosition;

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);
            if (newState == RecyclerView.SCROLL_STATE_IDLE && mScrolled) {
                mScrolled = false;
                final View currentView = snapHelper.findSnapView(layoutManager);
                if (currentView == null) return;    // null when layout manager doesn't scroll
                int pos = layoutManager.getPosition(currentView);
                if (snapPosition != pos) {
                    snapPosition = pos;
                    Log.d(TAG, "Snap Pos: " + snapPosition);
                }

            }
        }

        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            if (dx != 0 || dy != 0) {
                mScrolled = true;
            }
        }
    });
    snapHelper.attachToRecyclerView(recyclerView);
}