Google Map3D object error

Question

Hello there. I'm trying to build my first Google Map application for Android using Burrito. I've found some code examples but I'm getting an error I don't understand.  I've downloaded/installed the Google SDK for Flex and I've Imported the map_1_20.swc and the map_flex_1_20.swc libraries into the "libs" folder.
The error shows up on the line where I'm declaring the maps:Map3D object.  The error is as follows:
Map3D declaration must becontained withing the <Declarations> tag, since it is not assignable to the default property's type 'Array' or the element type 'mx.core.IVisualElement'.
The advice in the error code goes against the code samples I've found where the Map3D object is always declared below the end of the Delarations tag. My code is below.  If anyone could help me out, that would be hugely appreciated.  Thank you very much!
<?xml version="1.0" encoding="utf-8"?>
<components:View xmlns:fx="http://ns.adobe.com/mxml/2009"
     xmlns:s="library://ns.adobe.com/flex/spark"
     xmlns:components="spark.components.*"
     title="Home"
     xmlns:maps="com.google.maps.*">
<fx:Declarations>
  <!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<maps:Map3D xmlns="com.google.maps.*" <-- This line errors -->
    id="mymap"
    url="my url"
    sensor="false"
    key=""
    width="100%"
    height="100%"/>
</components:View>

Answer 1

Thank you very much for having a look at my error. I agree with you that the Google API key is tied to a website URL and it seems odd to use it in a mobile app. However, it looks like what I'm trying to do should be possible. I'm following the directions found at the following web site:
http://sheetalnilwant.wordpress.com/2010/12/04/google-maps-api-using-flash-builder-burrito /
What do you think of what that code sample?