title: How to resume an activity when calling it from an Intent
body: <p>I have the following situation: one activity (DateActivity) calls another activity (ListActivity) when a button is clicked. That is working. However, every time the button is clicked it seems that a new copy of ListActivity is created. How do I make it resume the last ListActivity or create a new one if needed?</p>
  
  <p>Note: I'm currently starting the ListActivity using <code>startActivity(intent);</code></p>