存取flex屏幕快照

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<?xml version="1.0" encoding="utf-8"?>

<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"?>

<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"?>

<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>