Android background image for multiple screens
<p>I read a topic about <a href="http://developer.android.com/guide/practices/screens_support.html" rel="nofollow">multiple screen support</a>, but I don't understand why I need a different picture for every screen size if I can stretch image by setting</p>

<pre><code>        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="@drawable/bk"
</code></pre>

<p>for every screen.</p>
