存取flex屏幕快照

<?xml version="1.0" encoding="utf-8"?>
<!-- http://yecon.blog.hexun.com/31031093_d.html -->
<Application name="FileReference_save_test"
xmlns="http://ns.adobe.com/mxml/2009"
xmlns:mx="library:adobe/flex/halo"
xmlns:net="flash.net.*"
layout="flex.layout.BasicLayout"
creationComplete="init();">
<Script>
<![CDATA[
private function init():void {
textArea.text = describeType(FileReference).toXMLString();
}
private function btn_click(evt:MouseEvent):void {
fileReference.save(textArea.text, "describeType.txt");
}
]]>
</Script>
<Declarations>
<net:FileReference id="fileReference" />
</Declarations>
<mx:Panel id="panel"
width="500"
height="300"
verticalCenter="0"
horizontalCenter="0">
<mx:TextArea id="textArea"
editable="true"
width="100%"
height="100%" />
<mx:ControlBar horizontalAlign="right">
<Button id="btn"
label="Save Text"
click="btn_click(event);" />
</mx:ControlBar>
</mx:Panel>
</Application>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//也可以通过XML对象直接使用FileReference类的save()方法：
<?xml version="1.0" encoding="utf-8"?>
<!-- http://yecon.blog.hexun.com/31031093_d.html -->
<Application name="FileReference_save_test"
xmlns="http://ns.adobe.com/mxml/2009"
xmlns:mx="library:adobe/flex/halo"
xmlns:net="flash.net.*"
layout="flex.layout.BasicLayout"
creationComplete="init();">
<Script>
<![CDATA[
private const xmlObj:XML = describeType(FileReference);
private function init():void {
textArea.text = xmlObj.toXMLString();
}
private function btn_click(evt:MouseEvent):void {
fileReference.save(xmlObj, "describeType.xml");
}
]]>
</Script>
<Declarations>
<net:FileReference id="fileReference" />
</Declarations>
<mx:Panel id="panel"
width="500"
height="300"
verticalCenter="0"
horizontalCenter="0">
<mx:TextArea id="textArea"
editable="true"
width="100%"
height="100%" />
<mx:ControlBar horizontalAlign="right">
<Button id="btn"
label="Save"
click="btn_click(event);" />
</mx:ControlBar>
</mx:Panel>
</Application>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//可以使用ImageSnapshot类来抓取截图，并通过将ByteArray交给FileReference类的save()方法对象保存到本地硬盘：
<?xml version="1.0" encoding="utf-8"?>
<!-- http://yecon.blog.hexun.com/31031093_d.html -->
<Application name="FileReference_save_test"
xmlns="http://ns.adobe.com/mxml/2009"
xmlns:mx="library:adobe/flex/halo"
xmlns:net="flash.net.*"
layout="flex.layout.BasicLayout"
creationComplete="init();">
<Script>
<![CDATA[
import mx.graphics.ImageSnapshot;
import mx.graphics.codec.*;
private const jpegEnc:JPEGEncoder = new JPEGEncoder();
private const xmlObj:XML = describeType(FileReference);
private function init():void {
textArea.text = xmlObj.toXMLString();
}
private function btn_click(evt:MouseEvent):void {
var imageSnap:ImageSnapshot = ImageSnapshot.captureImage(panel, 0, jpegEnc);
fileReference.save(imageSnap.data, "describeType.jpg");
}
]]>
</Script>
<Declarations>
<net:FileReference id="fileReference" />
</Declarations>
<mx:Panel id="panel"
width="500"
height="300"
verticalCenter="0"
horizontalCenter="0">
<mx:TextArea id="textArea"
editable="true"
width="100%"
height="100%" />
<mx:ControlBar horizontalAlign="right">
<Button id="btn"
label="Save"
click="btn_click(event);" />
</mx:ControlBar>
</mx:Panel>
</Application>

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