title: onResume is not called when I relaunch the app after home button pressed
body: <p>So I have my main activity, and when you press a button it launches activity2. Once activity2 is launched I press the home button and it will trigger <em>onPause</em> at activity2 and then the desktop of the android device comes to top. Everything's ok.</p>
  
  <p>The problem is: now I click the app icon and instead of coming to top activity2 (the last active), it comes my main activity. So <em>onResume</em> is not called on activity2, but on my main activity.</p>
  
  <p>Isn't it supposed to be called <em>onResume</em> on activity2? How could I make it work?</p>