@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);

    }