Start a new activity or setContentView?
<p>Is it better to start a new activity or just set a new content view in Android? </p>

<p>I usually start a new activity when I have to change the whole environment, but IMHO I think it's too onerous when I need to keep the other activity alive in the background.  </p>

<p>On the other hand, I could have a single activity and just change the layout when I have to set a new environment.  </p>

<p>Which is the better way and why?</p>
