@Override
 protected void bindHeader(HeaderViewHolder holder, int position) {
   super.bindHeader(holder, position);
   if (mTopic != null) {
     ImageLoader.loadImage(mTopic.getAvatarUrl(), holder.getImageView(R.id.iv_avatar));
     holder.getTextView(R.id.tv_username).setText(mTopic.getAuther());
     holder.getTextView(R.id.tv_create_time).setText(mTopic.getStatus());
     holder.getTextView(R.id.tv_title).setText(mTopic.getTitle());
     ((LJWebView) holder.getView(R.id.tv_content)).loadHtml(mTopic.getText());
   }
 }