如何在移动项目中使用 Flex 4.5.1 捕获图像？

Question

我是 Flex 和 ActionScript 编程的新手，并且正在尽快学习。我尝试过一些示例应用程序。现在我尝试通过 PC 附带的网络摄像头使用 ActionScript 捕获图像。

我写了以下代码...

        protected var myCam:CameraUI;

        protected function view1_viewActivateHandler(event:ViewNavigatorEvent):void
        {
            if (CameraUI.isSupported){
                currentState = "normal";
                myCam = new CameraUI();
                myCam.addEventListener(MediaEvent.COMPLETE, onComplete);
            }
            else currentState = "unsupported";
        }

        protected function btnPic_clickHandler(event:MouseEvent):void
        {
            img.filters = [];
            myCam.launch(MediaType.IMAGE);
        }

        protected function onComplete(evt:MediaEvent):void
        {
            img.source = evt.data.file.url;
        }

        protected function applyFilter():void
        {
            if (img.filters.length==0)
            {
                var matrixArray:Array = [.33,.33,.33,0,0,
                    .33,.33,.33,0,0,
                    .33,.33,.33,0,0,
                    0,0,0,1,0];
                var blackWhiteFilter:ColorMatrixFilter = new ColorMatrixFilter(matrixArray);
                img.filters = [blackWhiteFilter];
                btnBW.label = "COLOR";
            }
            else 
            {
                img.filters = [];
                btnBW.label = "B/W FILTER";
            }
        }
    ]]>
</fx:Script>

<s:states>
    <s:State name="normal"/>
    <s:State name="unsupported"/>
</s:states>

<s:layout>
    <s:VerticalLayout paddingTop="20" paddingBottom="20" paddingLeft="10" paddingRight="20" gap="40" 
                      horizontalAlign="center" verticalAlign="middle"/>
</s:layout>

<s:Label text="This device does not support Camera." width="95%" includeIn="unsupported"/>
<s:HGroup includeIn="normal">
    <s:Button id="btnPic" click="btnPic_clickHandler(event)" label="TAKE A PICTURE"/>
    <s:Button id="btnBW" click="applyFilter()" label="B/W FILTER" />
</s:HGroup>

<s:Image id="img" height="649" y="124" width="460" x="10" includeIn="normal"/>    

但没有检测到相机.. currentsState 始终不受支持...有什么问题吗...

还有其他方法可以使用 FlexMobileProject 为移动设备捕获图像/视频吗？

任何与 Flex 移动开发相关的博客/教程都会有 gr8 帮助..谢谢...

Answer 1

来自文档：
“使用 Camera 类从客户端系统或设备摄像头捕获视频。使用 Video 类在本地监视视频。”

您应该阅读的第一件事是关于 Camera 类。

然后查看视频类。

文档中的示例：

    package {
        import flash.display.Sprite;
        import flash.display.StageAlign;
        import flash.display.StageScaleMode;
        import flash.events.*;
        import flash.media.Camera;
        import flash.media.Video;

public class CameraExample extends Sprite {
    private var video:Video;

    public function CameraExample() {
        stage.scaleMode = StageScaleMode.NO_SCALE;
        stage.align = StageAlign.TOP_LEFT;

        var camera:Camera = Camera.getCamera();

        if (camera != null) {
            camera.addEventListener(ActivityEvent.ACTIVITY, activityHandler);
            video = new Video(camera.width * 2, camera.height * 2);
            video.attachCamera(camera);
            addChild(video);
        } else {
            trace("You need a camera.");
        }
    }

    private function activityHandler(event:ActivityEvent):void {
        trace("activityHandler: " + event);
    }
}
}

看看您是否可以使该位工作，然后询问有关过滤图片并保存它的另一个问题。