有效的解决ListView宽度设置为wrap_content还是占满整行的问题

代码如下：前提是lsitview已经添加了item，要不然listAdapter.getCount()会返回负值

public  void  setListViewBasedOnChildren(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter();
        if  (listAdapter ==  null ) {
        // pre-condition
            return ;
        }
        int  totalHeight =  0 ;
        int  maxWidth =  0 ;
        for  ( int  i =  0 ; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i,  null , listView);
            listItem.measure( 0 ,  0 );
            totalHeight += listItem.getMeasuredHeight();
            int  width = listItem.getMeasuredWidth();
            if (width>maxWidth)maxWidth = width;
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() -  1 ));
        params.width = maxWidth;
        listView.setLayoutParams(params);
    }