[Android] ExpandableListView , BaseExpandableListAdapter

listview 설정부분       final ExpandableListView listView = (ExpandableListView)v.findViewById(R.id.listview); //     listView .setGroupIndicator(null); // child onoff 화살표를 없애려면 null 설정. //     StateListDrawable groupIndicator = (StateListDrawable)getResources().getDrawable(R.drawable.arrow_sel); //     myListView.setGroupIndicator(groupIndicator);      MyAdapter myAdapter= new MyAdapter(this);      myListView.setAdapter(myAdapter); custom adapter 부분   private class MyAdapter extends BaseExpandableListAdapter{      private LayoutInflater mInflater;      private Context mContext;            public MyAdapter(Context context) {       mContext = context;       mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);          }         @Override   public MyClass getChild(int arg0, int arg1) {      return null /*child 부분 설정해놓으세요.*/;   }   @Override   public long getChildId(int groupPosition, int childPosition) {    // TODO Auto-generated method stub    return childPosition;   }   @Override   public View getChildView(int groupPosition, int childPosition,     boolean isLastChild, View convertView, ViewGroup parent) {    MyClass item = this.getChild(groupPosition, childPosition);        if(convertView == null)convertView = mInflater.inflate(R.layout.item_child, null);        if(item != null){     TextView content = (TextView)convertView.findViewById(R.id.child);    }             return convertView;   }   @Override   public int getChildrenCount(int groupPosition) {    // TODO Auto-generated method stub    return 1;   }   @Override   public Object getGroup(int groupPosition) {    // TODO Auto-generated method stub    return null /*getGroup 부분설정해놓으세요*/;   }   @Override   public int getGroupCount() {    // TODO Auto-generated method stub    return null /*getGroupCount부분설정해놓으세요*/;   }   @Override   public long getGroupId(int groupPosition) {    // TODO Auto-generated method stub    return groupPosition;   }   @Override   public View getGroupView(int groupPosition, boolean isExpanded,     View convertView, ViewGroup parent) {        MyClass item = myClassListData.get(groupPosition);        if(convertView == null)convertView = mInflater.inflate(R.layout.group, null);        if(item != null){     TextView content = (TextView)convertView.findViewById(R.id.group);    }                return convertView;   }   @Override   public boolean hasStableIds() {    return false;   }   @Override   public boolean isChildSelectable(int groupPosition, int childPosition) {    // TODO Auto-generated method stub    return true;   } xml부분. 일부     <ExpandableListView      android:id="@+id/listview"      android:layout_width="match_parent"      android:layout_height="match_parent"      android:groupIndicator="@drawable/arrow_sel"      android:indicatorLeft="0px"      android:indicatorRight="0px"      android:divider="#000000"      android:dividerHeight="1px"      android:childDivider="#000000"     ></ExpandableListView>

위 코드는 임의로 작성한것으므로 비어있는부분을 채워야하며 작동 안할 수도있다.
그건 스스로 해결하자.

추가//

Group 닫기 collapseGroup(int) Group 펼치기 expandGroup(int) listView .setGroupIndicator(null); // child onoff 화살표를 없애려면 null 설정 //선택된 group만 open    listView.setOnGroupClickListener(new OnGroupClickListener() {    @Override    public boolean onGroupClick(ExpandableListView parent, View v,      int groupPosition, long id) {          //클릭한 group이 열려있는 현재 group 이면 현재 group을 닫고 return;     if(listView.isGroupExpanded(groupPosition)){      listView.collapseGroup(groupPosition);      return true;     }          //close     for (int i = 0; i < myCassData.size(); i++) {      if(listView.isGroupExpanded(i)){             listView.collapseGroup(i);      }        }          //open     listView.expandGroup(groupPosition);          return true; // 여기서 false 로하면 자체적으로 지원하는 코드를 타므로 true해서 막아주어야함.    }   });