title: App closing when pressing go back button
body: <p>I have an application that has the next diagram</p>
  
  <p><img src="https://i.stack.imgur.com/bSIFw.jpg" alt="http://i.stack.imgur.com/bSIFw.jpg"></p>
  
  <p>Once i arrive to activity B with the different previous path if I do home button and open the app again, correctly activity B is displayed BUT if I use "go back" button instead of home button, when I open the app again I get Activity A displayed instead of the last one that was Activity B. </p>
  
  <p>Im finishing all my previous activity, one I arrive B, B is the only one active, all the previous (ACD) were close because If i hit "go back" on Activity B button i dont wanna go neither to AC or D just act send the app to the background.</p>