title: What is the recommend way to get the main Activity from child Activity
body: <p>My android application has 1 main activity. And it launches some sub-activity (which I wrote) and that also launches some sub-activity (which I wrote).  I do this:</p>
  
  <pre><code> Intent i = new Intent("my intent1");
   startActivity(i);
  </code></pre>
  
  <p>My question is how can each of my sub-activity and sub-sub-activity get back to the Parent activity?</p>
  
  <p>Thank you.</p>