ExpandableListView会为每个GroupView相同ChildViews(Expand

我已经实现了ExpandableListView和BaseExpandableListAdapter 。我想显示GroupObjects的列表。每GroupObject（在ExpandableList顶级项目）有3个ChildObjects（在ExpandableList儿童项目）的ArrayList。

我现在用的是viewHolder模式。该GroupObjects正确显示。有一次，我展开第一个GroupObject， getChildView()被调用3次，并正确显示其ChildObjects。

但只要我展开另一个GroupObject， getChildView()返回第一个GroupObject的ChildObjects。由于第二呼叫convertView不为空，它总是返回相同的ChildObjects。

下面是一些代码：

@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild,
        View convertView, ViewGroup parent) {
    final ChildObject childobject = (ChildObject)getChild(groupPosition, childPosition);
    ChildViewholder childViewholder;

    if (convertView == null) {
        childViewholder = new ChildViewholder();
        LayoutInflater inflater = (LayoutInflater)context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        if (!childobject.isReserved()) {
            convertView = inflater.inflate(R.layout.childobject_free,
                    parent, false);
            childViewHolder.layout = (RelativeLayout)convertView
                    .findViewById(R.id.childobject_free_layout);

        } else {
            final Reservation reservation = childobject.getReservation();
            convertView = inflater.inflate(
                    R.layout.childobject_reserved, parent, false);
            childViewHolder.layout = (RelativeLayout)convertView.findViewById(R.id.reserved_layout);

            childViewHolder.reservationImage = (ImageView)convertView.findViewById(R.id.reservationImage);
            childViewHolder.reservationName = (TextView)convertView.findViewById(R.id.reservationName);
            childViewHolder.buttonFinish = (ImageButton)convertView
                    .findViewById(R.id.finishButton);
            childViewHolder.buttonCancel = (ImageButton)convertView
                    .findViewById(R.id.cancelButton);
            childViewHolder.progressBar = (ProgressBar)convertView
                    .findViewById(R.id.reservationProgress);

            childObject.getTimer().setProgressBar(childViewHolder.progressBar);
            childViewHolder.reservationName.setText(reservation.getName());
            childViewHolder.reservationImage.setImageBitmap(reservation.getBitmap());

            childViewHolder.buttonFinish.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    DrawerClickHandler.finishReservation(reservation);
                }
            });

            childViewHolder.buttonCancel.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    DrawerClickHandler.cancelReservation(reservation);
                }
            });

        }

        convertView.setTag(childViewholder);

    }else{
        childViewholder = (ChildViewholder)convertView.getTag();
    }

        childViewHolder.groupPosition = groupPosition;
        childViewHolder.childPosition = childPosition;

        return convertView;
}

该convertView只对前3调用空getChildView()

让我知道如果你需要更多的代码。

任何帮助表示赞赏。