ExpandableListView的一些基本语法以及用法，程序员须知的基本标准

1.当scrollView嵌套expandableListVIew时，我们获取listView的全部高度；
/**
* 计算expendableListView的初始高度
*
* @param listView
* @return
*/
public static int setListViewHeightBasedOnChildren(
ExpandableListView listView) {
// 获取ListView对应的Adapter
ExpandableListAdapter listAdapter = listView.getExpandableListAdapter();
if (listAdapter == null) {
// pre -condition
return 0;
}

    int totalHeight = 0;
    for (int i = 0; i < listAdapter.getGroupCount(); i++) { // listAdapter.getCount()返回数据项的数目
        View listgroupItem = listAdapter.getGroupView(i, true, null,
                listView);
        listgroupItem.measure(0, 0); // 计算子项View 的宽高
        totalHeight += listgroupItem.getMeasuredHeight(); // 统计所有子项的总高度
        System.out.println("height : group" + i + "次" + totalHeight);
         for (int j = 0; j < listAdapter.getChildrenCount(i); j++) {
         View listchildItem = listAdapter.getChildView(i, j, false, null,
         listView);
         listchildItem.measure(0, 0); // 计算子项View 的宽高
         totalHeight += listchildItem.getMeasuredHeight(); // 统计所有子项的总高度
         System.out.println("height :" + "group:" + i + " child:" + j +
         "次" + totalHeight);

         }


    }

    ViewGroup.LayoutParams params = listView.getLayoutParams();
    params.height = totalHeight
            + (listView.getDividerHeight() * (listAdapter.getGroupCount() - 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);
    return params.height;
}

2.监听expandablelistVIew’的开关

listView.setOnGroupExpandListener(new OnGroupExpandListener() {
        @Override
        public void onGroupExpand(int groupPosition) {
            // TODO Auto-generated method stub
            for (int i = 0; i < listView.getAdapter().getCount(); i++) {
                if ((groupPosition != i) && listView.isGroupExpanded(i)) {
                    listView.collapseGroup(i);
                    Log.d("TAG", "Expand to collapse");
                } else {
                    UIUtils.setExpandedListViewHeightBasedOnChildren(
                            listView, groupPosition);
                }
            }
        }
    });
    listView.setOnGroupCollapseListener(new OnGroupCollapseListener() {
        @Override
        public void onGroupCollapse(int groupPosition) {
            // TODO Auto-generated method stub


            getViewHeight(UIUtils.setCollapseListViewHeightBasedOnChildren(
                    listView, groupPosition));
        }
    });