判断VideoDisplay组件当前的播放状态。播放|缓冲。

state 属性and stateChange 事件的学习。
示例：

代码：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2008/01/01/determining-a-videodisplay-controls-current-playback-state-using-the-state-property-and-statechange-event/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="horizontal"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < mx:Script >
         <![CDATA[
            import mx.collections.ArrayCollection;
            import mx.events.VideoEvent;

            [Bindable]
            private var arrColl:ArrayCollection = new ArrayCollection();

            private const VIDEO_URL:String = "http://www.helpexamples.com/flash/video/water.flv";

            private function videoDisplay_stateChange(evt:VideoEvent):void {
                /* videoDisplay.state == evt.state */
                arrColl.addItem({label:videoDisplay.state});
                progressBar.label = evt.state;
            }

            private function button_click(evt:MouseEvent):void {
                /* Reset ArrayCollection object. */
                arrColl = new ArrayCollection();
                /* Set the Canvas container to visible. */
                canvas.visible = true;
                /* If video is currently playing, stop playback. */
                if (videoDisplay.playing) {
                    videoDisplay.stop();
                }
                /* Set VideoDisplay control's source property and start
                   video playback. */
                videoDisplay.source = VIDEO_URL;
                videoDisplay.play();
            }

            private function videoDisplay_playheadUpdate(evt:VideoEvent):void {
                progressBar.setProgress(evt.playheadTime, videoDisplay.totalTime);
            }
         ]]>
     </ mx:Script >

     < mx:ApplicationControlBar  dock ="true" >
         < mx:Button  id ="button"
                label ="load movie"
                click ="button_click(event);"   />
     </ mx:ApplicationControlBar >

     < mx:Canvas  id ="canvas"  visible ="false" >
         < mx:VideoDisplay  id ="videoDisplay"
                playheadUpdateInterval ="50"
                stateChange ="videoDisplay_stateChange(event);"
                playheadUpdate ="videoDisplay_playheadUpdate(event);"   />

         < mx:ProgressBar  id ="progressBar"
                label =""
                labelPlacement ="center"
                mode ="manual"
                bottom ="0"
                horizontalCenter ="0"   />
     </ mx:Canvas >

     < mx:List  id ="list"
            dataProvider =" {arrColl} "
            width ="100"   />

</ mx:Application >

 

来自：http://www.adobe.com/cfusion/entitlement/index.cfm?e=flex%5Fskins