计算ListView中一个item的高度

            for (int i = 0, len = listAdapter.getCount(); i < len; i++) {
                View listItem = listAdapter.getView(i, null, listView);
                listItem.measure(0, 0); // 计算子项View 的宽高
                int list_child_item_height = listItem.getMeasuredHeight()+listView.getDividerHeight();
                Log.w("ListView Child Height", "child height="+list_child_item_height);
                totalHeight += list_child_item_height; // 统计所有子项的总高度
        }