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);

           }

    }