动态设置ScrollView里面的ListView的高度

思路：循环取得listview中的Item的高度，把所有Item高度累加，就是Listview的高度。

 1     public static void setListViewHeightBasedOnChildren(ListView listView) {
 2         if (listView == null)
 3             return;
 4         ListAdapter listAdapter = listView.getAdapter();
 5         if (listAdapter == null) {
 6             return;
 7         }
 8         int totalHeight = 0;
 9         for (int i = 0; i < listAdapter.getCount(); i++) {
10             View listItem = listAdapter.getView(i, null, listView);
11             listItem.measure(0, 0);
12             totalHeight += listItem.getMeasuredHeight();
13         }
14         ViewGroup.LayoutParams params = listView.getLayoutParams();
15         params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
16         listView.setLayoutParams(params);
17     }