The following example shows how you can change the text alignment in a Flex List control by setting the textAlign style.

Full code after the jump.

<?xml version=”1.0″ encoding=”utf-8″?>
<mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml”
layout=”vertical”
verticalAlign=”middle”
backgroundColor=”white”>

<mx:Array id=”arr”>
<mx:Object label=”One” />
<mx:Object label=”Two” />
<mx:Object label=”Three” />
<mx:Object label=”Four” />
<mx:Object label=”Five” />
<mx:Object label=”Six” />
</mx:Array>

<mx:ApplicationControlBar dock=”true”>
<mx:Form styleName=”plain”>
<mx:FormItem label=”textAlign:”>
<mx:ComboBox id=”comboBox”
dataProvider=”[left,center,right]” />
</mx:FormItem>
</mx:Form>
</mx:ApplicationControlBar>

<mx:List id=”list”
dataProvider=”{arr}”
textAlign=”{comboBox.selectedItem}”
width=”100″ />

</mx:Application>