title: How to not destroy current activity when back is presse
body: <p>I couldn't find any answers on this, and I am a little lost.  I have two activities, Act1 and Act2.  I have a button in Act1 that starts a new intent to Act2 when it is pressed.  However whenever i hit the back button while in Act2, than click the button again is restarts a new Intent.  </p>
  
  <p>i do not want it to do that... i want it to resume Act2.  How can I go about doing it? Thanks in advance/</p>