title: Manipulating a group view in a ExpandableListView from the child view
body: <p>I'm building an <code>ExpandableListView</code> in which there are groups of radio buttons.</p>
  
  <p>Currently, I am able to handle the click event on each radio button and select the corresponding one and deselect the others. But there is just one more thing needed to make it perfect. That is displaying the value of the selected checkbox in the group view so the user can see what is selected without expanding it. </p>
  
  <p>For that purpose, I have a <code>TextView</code> in the group view. Is it possible to update that <code>TextView</code> when a checkbox is selected in the child view?</p>
  
  <p>Here is a screenshot of what I have right now:</p>
  
  <p><img src="https://i.stack.imgur.com/eUiDh.png" alt="Screenshot 1"></p>
  
  <p>Basically what I want to accomplish is to make it write the value of the selected checkbox instead of "Regular".</p>
  
  <p>Thanks. </p>