title: Size of fullscreen activity background image
body: <p>I got a app that uses a full screen activity with a background bitmap, how big background image do I need to avoid up scaling of the background image? I have read somewhere that the different sizes is </p>
  
  <pre><code>screen size size is at least    size can be upto
  xlarge      960dp x 720dp       1920dp x 1080dp
  large       640dp x 480dp       960dp x 720dp
  normal      470dp x 320dp       640dp x 480dp
  smal        426dp x 320dp       470dp x 320dp
  </code></pre>
  
  <p>If I don't want up scaling or stretching of the full screen activities background bitmap it should be of size</p>
  
  <pre><code>xlarge      1920dp x 1080dp
  large       960dp x 720
  normal      640dp x 480dp
  smal        470dp x 320dp
  </code></pre>
  
  <p>Is this correct?</p>