Android：Expandlelist，带有文本和按钮

Question

我正在创建这个exapandlelist，工作正常。但现在我有兴趣在页面按钮上创建按钮。似乎代码清除了所有布局并创建了一个新的。因此，当我添加一个按钮文本或其他文本时，这将被删除。

如何阻止删除布局？

代码来自：http://www.learn-android-easily.com/2013/07/android-expandablelistview-example.html

 @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState); //gemmer sidste tilstand

        // Create Expandable List and set it's properties
        ExpandableListView expandableList = getExpandableListView(); 
        expandableList.setDividerHeight(2);
        expandableList.setGroupIndicator(null);
        expandableList.setClickable(true);

        // Set the Items of Parent and child
        prepareListData();

        // Create the Adapter
        adapter = new MyExpandableAdapter(parentParam, childItems);
        //setListAdapter(adapter);

        //ExpandableListView listView = (ExpandableListView) findViewById(R.id.listView);
        adapter.setInflater((LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE), this);
        adapter.notifyDataSetChanged();

        // Set the Adapter to expandableList
        expandableList.setAdapter(adapter);
        expandableList.setOnChildClickListener(this);

    }