Flex操作摄像头

      Flex通过Camera类来操作摄像头。使用Camera类可以通过连接运行Adobe Flash Player的计算机的视频摄像头捕获视频。

      Camera类通过getCamera()方法返回摄像头，在WSF访问摄像头时，Flash Player会显示一个对话框，用户可以通过该对话框允许或拒绝对摄像头的访问。

      简单示例：

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

 2:  <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="InitCamera()">

 3:      <mx:Script>

 4:          <![CDATA[

 5:              import flash.events.*;

 6:              import flash.media.Camera;

 7:              import flash.media.Video;

 8:   

 9:              private var video:Video;

10:              public function InitCamera():void

11:              {

12:                  //获取摄像头

13:                  var c:Camera=Camera.getCamera();

14:                  if(c != null)

15:                  {

16:                      c.addEventListener(ActivityEvent.ACTIVITY,activityHandler);

17:                      video=new Video(c.width*2,c.height*2);

18:                      video.attachCamera(c);

19:                      vdTest.addChild(video);

20:                  }

21:                  else

22:                  {

23:                      trace("请连接摄像头");

24:                  }

25:              }

26:   

27:              private function activityHandler(event:ActivityEvent):void{

28:                  trace("activityHandler: " + event);

29:              }

30:   

31:          ]]>

32:      </mx:Script>

33:      

34:      <mx:VideoDisplay id="vdTest" width="160" height="120"/>

35:  </mx:Application>