public class Utility {           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);           }    }