public void setListViewHeightBasedOnChildren(ListView listView) {            // 获取ListView对应的Adapter            ListAdapter listAdapter = listView.getAdapter();            if (listAdapter == null) {                return;            }            int totalHeight = 0;            for (int i = 0, len = listAdapter.getCount(); i < len; i++) { // listAdapter.getCount()返回数据项的数目                View listItem = listAdapter.getView(i, null, listView);                listItem.measure(0, 0); // 计算子项View 的宽高                totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度            }            ViewGroup.LayoutParams params = listView.getLayoutParams();            params.height = totalHeight                    + (listView.getDividerHeight() * (listAdapter.getCount() - 1));            // listView.getDividerHeight()获取子项间分隔符占用的高度            // params.height最后得到整个ListView完整显示需要的高度            listView.setLayoutParams(params);        }