我如何让它四舍五入，而不是总是倒圆角？(How do I make it round off instead of always round down?)

 最后，我在自定义视图类中创建了一个函数，其中ListView和行数作为参数。 在视图中我将setOnScrollListener设置为ListView，并在滚动到自定义视图的全局滚动变量时指定ListView的位置。 喜欢这个 
 
public void setListView(final TwoWayView listView, int totalListRows) {
    totalColumns = totalListRows;
    for (int i = 0; i < totalColumns; i++) {
        listViewItemHeights.put(i,  (int) getResources().getDimension(R.dimen.column_width));
    }
    listView.setOnScrollListener(new TwoWayView.OnScrollListener() {

        @Override
        public void onScrollStateChanged(TwoWayView view, int scrollState) {

        }

        @Override
        public void onScroll(TwoWayView view, int firstVisibleItem,
                int visibleItemCount, int totalItemCount) {
            c = listView.getChildAt(0);
            if (c != null) {
                int oldScrollX = scrollX;
                scrollX = -c.getLeft();


                for (int i = 0; i < listView.getFirstVisiblePosition(); ++i) {
                    if (listViewItemHeights.get(i) != null) {
                        scrollX += listViewItemHeights.get(i);
                    } 

                }
                scrollBy(scrollX - oldScrollX, 0);
            } 

        }
    });


}

At the end I created a function in my custom view class with the ListView and the number of rows as parameters. Inside the view I setOnScrollListener to the ListView and I assign the position of my ListView while scrolling to my global scroll variable of the custom view. Like this 
 
public void setListView(final TwoWayView listView, int totalListRows) {
    totalColumns = totalListRows;
    for (int i = 0; i < totalColumns; i++) {
        listViewItemHeights.put(i,  (int) getResources().getDimension(R.dimen.column_width));
    }
    listView.setOnScrollListener(new TwoWayView.OnScrollListener() {

        @Override
        public void onScrollStateChanged(TwoWayView view, int scrollState) {

        }

        @Override
        public void onScroll(TwoWayView view, int firstVisibleItem,
                int visibleItemCount, int totalItemCount) {
            c = listView.getChildAt(0);
            if (c != null) {
                int oldScrollX = scrollX;
                scrollX = -c.getLeft();


                for (int i = 0; i < listView.getFirstVisiblePosition(); ++i) {
                    if (listViewItemHeights.get(i) != null) {
                        scrollX += listViewItemHeights.get(i);
                    } 

                }
                scrollBy(scrollX - oldScrollX, 0);
            } 

        }
    });


}