title: Android - background images take too much memory
body: <p>In my game I have 3 activities: Main menu -> Sub-menu -> Game screen. So when user is playing in the Game screen, first two activities are inactive, but not destroyed.</p>
  
  <p>There is a nice background image in each layout. The image itself is quite small (40k), but on large screen (say Galaxy tablet), it takes up to several megs of memory.
  After removing background from first two activities, memory usage in third activity falls from 18M to 13M!</p>
  
  <p>Is there any way to keep backgrounds and to recover all this wasted memory?</p>