title: android expandable list view get group from child
body: <p>I have a button in a child, and I want to change a group's TextView of this child.
  In my getChildView I got.</p>
  
  <pre><code>    holderChild.revert = (ImageView) convertView.findViewById(R.id.revert);
      holderChild.revert.setOnClickListener(new OnClickListener() {
  
          public void onClick(View v) 
          {
              ViewHolderChild v2 = (ViewHolderChild)((View)v.getParent()).getTag();
  
          }
      });
  </code></pre>
  
  <p>And with this I have the child, but I'd want to have the group of this child</p>