在android中折叠可扩展列表时出现致命异常答案

【问题标题】：Fatal exception while collapsing a expandable list in android在android中折叠可扩展列表时出现致命异常
【发布时间】：2014-05-22 13:04:05
【问题描述】：

我正在努力在可扩展列表视图中折叠一个组，我需要的是，我需要折叠除选定组之外的所有组。我尝试了下面的代码，它在当前位置小于先前位置时工作，反之亦然，我遇到了一个致命的异常，我也无法捕捉到它。

elv.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {

     @Override
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {


          if (lastExpandedGroupPosition != -1 && groupPosition != lastExpandedGroupPosition) {
            if(lastExpandedGroupPosition>groupPosition){
                  elv.collapseGroup(lastExpandedGroupPosition);
               }else{
                    Log.v("last expand value", ""+lastExpandedGroupPosition);
                        Log.v("groupPosition", ""+groupPosition);
                        Log.v("count", ""+elv.getCount());

                 elv.collapseGroup(lastExpandedGroupPosition);

                    }
                }
               lastExpandedGroupPosition = groupPosition;

                return false;
            }
        });

【问题讨论】：

我没有看到任何堆栈跟踪发布
也发布您的错误日志！

标签： android expandablelistview collapse

【解决方案1】：

我通过将 setOnGroupClickListener 更改为 setOnGroupExpandListener 解决了这个问题

 elv.setOnGroupExpandListener(new OnGroupExpandListener() {

@Override
public void onGroupExpand(int groupPosition) {
    // TODO Auto-generated method stub
if (lastExpandedGroupPosition != -1 && groupPosition != lastExpandedGroupPosition) {
           if(lastExpandedGroupPosition>groupPosition){
                  elv.collapseGroup(lastExpandedGroupPosition);
                    }else{
                    Log.v("last expand value", ""+lastExpandedGroupPosition);
                        Log.v("groupPosition", ""+groupPosition);
                        Log.v("count", ""+elv.getCount());

                     elv.collapseGroup(lastExpandedGroupPosition);


                    }
                }
                lastExpandedGroupPosition = groupPosition;
            }
        });

【讨论】：