Flex中如何监测摄像头Camera对象活动以及状态事件与信息

main.mxml

1. <?xml version="1.0" encoding="utf-8"?>
2. <mx:Applicationxmlns:mx="http://www.adobe.com/2006/mxml"
3. layout="horizontal"
4. verticalAlign="middle"
5. backgroundColor="white">
7. <mx:Script>
8. <![CDATA[
9. import mx.controls.Alert;
10. import mx.utils.StringUtil;
12. private function videoDisplay_creationComplete():void {
13. var camera:Camera = Camera.getCamera();
14. if (camera) {
15. videoDisplay.attachCamera(camera);
16. camera.addEventListener(ActivityEvent.ACTIVITY, camera_activity);
17. camera.addEventListener(StatusEvent.STATUS, camera_status);
18. } else {
19. Alert.show("You don't seem to have a camera.");
20. }
21. }
23. private function camera_activity(evt:ActivityEvent):void {
24. var str:String = "[{0}] activating:{1}\n";
25. textArea.text += StringUtil.substitute(str,
26. evt.type,
27. evt.activating);
28. }
30. private function camera_status(evt:StatusEvent):void {
31. var str:String = "[{0}] code:'{1}', level:'{2}'\n";
32. textArea.text += StringUtil.substitute(str,
33. evt.type,
34. evt.code,
35. evt.level);
36. switch (evt.code) {
37. case "Camera.Muted":
38. Alert.show("User denied access to camera.");
39. break;
40. case "Camera.Unmuted":
41. Alert.show("User allowed access to camera.");
42. break;
43. }
44. }
45. ]]>
46. </mx:Script>
48. <mx:VideoDisplayid="videoDisplay"
49. creationComplete="videoDisplay_creationComplete();"
50. width="160"
51. height="120"/>
53. <mx:TextAreaid="textArea"
54. editable="false"
55. width="100%"
56. height="{videoDisplay.height}"
57. wordWrap="false"
58. verticalScrollPolicy="on"/>
60. </mx:Application>