title: Flex mobile project does not support mx:Canvas?
body: <p>In Flash Builder, if I new a Flex Mobile Project, and paste the following code:</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  &lt;!-- Simple example to demonstrate the Halo Canvas layout container. --&gt;
  &lt;s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
                 xmlns:s="library://ns.adobe.com/flex/spark"
                 xmlns:mx="library://ns.adobe.com/flex/mx"&gt;
      &lt;s:Group/&gt;
      &lt;mx:Canvas/&gt;
  &lt;/s:Application&gt;
  </code></pre>
  
  <p>The "Canvas" line fails to compile. However it's OK in a Flex Project. My question is, is there any way to use Canvas or other halo controls without modifying the legacy code in Flex Mobile Project? Or, is there any way to use Native Extension in Flex Project? If both are NO, it would be a nightmare.</p>