How to know if list is scrooling down or up #Android

scrollState.java

setOnScrollListener(new OnScrollListener(){
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
      // TODO Auto-generated method stub
    }
    public void onScrollStateChanged(AbsListView view, int scrollState) {
      // TODO Auto-generated method stub
        final ListView lw = getListView();

        if(scrollState == 0) 
        Log.i("a", "scrolling stopped...");


        if (view.getId() == lw.getId()) {
            
            final int currentFirstVisibleItem = lw.getFirstVisiblePosition();
            
            if (currentFirstVisibleItem > mLastFirstVisibleItem) {
                mIsScrollingUp = false;
                Log.i("a", "scrolling down...");
            } else if (currentFirstVisibleItem < mLastFirstVisibleItem) {
                mIsScrollingUp = true;
                Log.i("a", "scrolling up...");
            }

            mLastFirstVisibleItem = currentFirstVisibleItem;
        } 
    }
  });