title: ImageView trouble
body: <pre><code>&lt;RelativeLayout xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
      android:layout_width=&quot;fill_parent&quot;
      android:layout_height=&quot;fill_parent&quot;&gt;
      &lt;ImageView              
          android:layout_width=&quot;wrap_content&quot;
          android:layout_height=&quot;wrap_content&quot;
          android:layout_centerHorizontal=&quot;true&quot;
          android:src=&quot;@drawable/wallpaper&quot; /&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  <p>The size of <code>@drawable/peetscoffee_wallpaper</code> is 640x480, but it is not centered horizontally.
  How can I fix this?</p>