title: How to Control Android back stack
body: <p>Lets say I have</p>
  
  <p>A->B->C->D->E</p>
  
  <p>In android back stack.  I want to be able to get back to one of the following:</p>
  
  <pre><code>A-&gt;B-&gt;C
  A-&gt;B
  A
  </code></pre>
  
  <p>How can I achieve this?  Hopefully without forcing back button clicks.</p>