FLEX4中怎样设置背景,及惭变色 .

<s:Group x="0" y="0" height="100%" width="100%">
 <s:Rect x="0" y="0" height="100%" width="100%">
  <s:fill>
   <s:BitmapFill source="@Embed('../pic/001.jpg')"/>
  </s:fill>
 </s:Rect>
</s:Group>

group相当于canvas，而后里面画一个矩形，在矩形里面用图片填充，也可以使用渐变色填充，如下：

<s:Rect alpha="0.5" x="0" y="0" width="100%" height="100%">
 <s:fill>
  <s:LinearGradient rotation="250">
   <s:GradientEntry color="0x222222" ratio="0"/>
   <s:GradientEntry color="0xdddddd" ratio="1"/>
  </s:LinearGradient>
 </s:fill>
</s:Rect>