public View getView(final int position, View convertView, ViewGroup parent) { 
    ItemViewHolder holder; 

    if (convertView == null) { 
        holder = new ItemViewHolder(); 
        convertView = LayoutInflater.from(context).inflate(R.layout.view_item, null); 
        holder.timeTextView = (TextView) convertView.findViewById(R.id.text_item_content_time); 
        holder.remarkTextView = (TextView) convertView.findViewById(R.id.text_item_content_remark); 
        convertView.setTag(holder); 
    } else { 
        holder = (ItemViewHolder)convertView.getTag(); 
    } 
           if(mMessageListGroup.get(mMessageList.get(position).getGroupId()).isShown()){ 
                convertView.setTag(R.id.child_show, true); 
           }else{ 
               convertView.setTag(R.id.child_show, false); 
           } 
     
    return convertView; 
}