title: How to convert a Drawable to a Bitmap?
body: <p>I would like to set a certain <code>Drawable</code> as the device's wallpaper, but all wallpaper functions accept <code>Bitmap</code>s only. I cannot use <code>WallpaperManager</code> because I'm pre 2.1.</p>
  
  <p>Also, my drawables are downloaded from the web and do not reside in <code>R.drawable</code>.</p>