flex捕获摄像头拍照

flex:

XML code

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="388" height="222" creationComplete="initApp()">
     <mx:Style>
         Alert{font-size:12px;}
     </mx:Style>
     <mx:Script>
         <![CDATA[
             import mx.graphics.codec.JPEGEncoder;
             import mx.events.CloseEvent;
             import mx.rpc.events.FaultEvent;
             import mx.rpc.events.ResultEvent;
             import mx.controls.Alert;
            
             private static const DEFAULT_CAMERA_WIDTH:Number = 160; //摄像头显示宽度
             private static const DEFAULT_CAMERA_HEIGHT:Number = 120; //摄像头显示高度
           
             private var m_camera:Camera; //定义一个摄像头
             private var m_localVideo:Video; //定义一个本地视频
             private var m_pictureBitmapData:BitmapData //定义视频截图
             [Bindable]
             private var m_pictureData:String;
             [Bindable]
             private var m_pictureBitmap:Bitmap; 
            
             private function initApp():void
             {
             /*     t_btn_Shooting.enabled = false;
                 t_ban_Save.enabled = false; */
                 initCamera();
             }
            
            
             private function initCamera():void
             {
                 m_camera = Camera.getCamera();
                 if(m_camera != null)
                 {
                     m_camera.addEventListener(StatusEvent.STATUS,__onCameraStatusHandler);
                    
                     m_camera.setMode(DEFAULT_CAMERA_WIDTH,DEFAULT_CAMERA_HEIGHT,30);
                     m_localVideo = new Video();
                     m_localVideo.width = DEFAULT_CAMERA_WIDTH;
                     m_localVideo.height = DEFAULT_CAMERA_HEIGHT;
                     m_localVideo.attachCamera(m_camera);
                     t_vd_Video.addChild(m_localVideo);
                 } else
                 {
                     Alert.show("没有找到摄像头，是否重新查找。","提示：",Alert.OK|Alert.NO,this,__InitCamera);
                     return;
                 }
             }
            
             //拍照按钮事件，进行视频截图
             private function SnapshotPicture():void
             {
                 m_pictureBitmapData = new BitmapData(DEFAULT_CAMERA_WIDTH,DEFAULT_CAMERA_HEIGHT);
                 m_pictureBitmapData.draw(t_vd_Video,new Matrix());                
                 m_pictureBitmap = new Bitmap(m_pictureBitmapData);
                 t_img_Picture.addChild(m_pictureBitmap);
                
                 t_panel_Picture.visible = true;
                 t_ban_Save.enabled = true;
             }
            
             //保存按钮事件，保存视频截图     
 
              private var file:FileReference = new FileReference(); 
             private function SavePicture():void
             {                 
                    var jpg:JPEGEncoder = new JPEGEncoder();
                    var ba:ByteArray = jpg.encode(m_pictureBitmapData);
                    file.save(ba,'1.jpg');
                /*     
                    var copyfile:FileReference = file;
                     var request: URLRequest = new URLRequest();
                    request.url="upphotoservlet";
                    request.method = "post";
                    copyfile.upload(request); // 将拍摄的照片上传至服务器  */
             }
            
             //检测摄像头权限事件
             private function __onCameraStatusHandler(event:StatusEvent):void
             {
                 if(!m_camera.muted)
                 {
                     t_btn_Shooting.enabled = true;
                 }
                 else
                 {
                     Alert.show("无法链接到活动摄像头，是否重新检测。","提示：",Alert.OK|Alert.NO,this,__InitCamera);
                 }
                 m_camera.removeEventListener(StatusEvent.STATUS,__onCameraStatusHandler);
             }
            
             //当摄像头不存在，或连接不正常时重新获取
             private function __InitCamera(event:CloseEvent):void
             {
                 if(event.detail == Alert.OK)
                 {
                     initApp();
                 }
             }
            
             //WebService保存图片成功事件
             private function __onSavePictureResult(event:ResultEvent):void
             {
                 //trace(event.result);
                 if(event.result.toString() == "保存成功")
                 {
                     Alert.show(event.result.toString(),"提示",Alert.OK,this,__onAlertCloseHandler);
                 }
                 else
                 {
                     Alert.show(event.result.toString(),"提示",Alert.OK);
                 }
             }
            
             //保存图片成功后的弹出窗口确认事件
             private function __onAlertCloseHandler(event:CloseEvent):void
             {
                 if(event.detail == Alert.OK)
                 {
                     //trace("转向页面");
                 }
             }
         ]]>
     </mx:Script>
     
     <mx:Panel x="10" y="10" width="180" height="200" layout="absolute" title="视频拍照" fontSize="12">
         <mx:VideoDisplay id="t_vd_Video" width="160" height="120"/>
         <mx:ControlBar horizontalAlign="right">
             <mx:Button id="t_btn_Shooting" label="拍照" click="SnapshotPicture()"/>
         </mx:ControlBar>
     </mx:Panel>
     <mx:Panel id="t_panel_Picture" x="198" y="10" width="180" height="200" layout="absolute" title="拍照图片" fontSize="12" visible="false">
         <mx:Image id="t_img_Picture" x="0" y="0" width="160" height="120"/>
         <mx:ControlBar  horizontalAlign="right">
             <mx:Button id="t_ban_Save" label="保存" click="SavePicture()" />
         </mx:ControlBar>
     </mx:Panel>
</mx:Application>