Flex在线拍照功能
功能：在线拍照简介：用flex与java结合实现在线拍照
需求：为了满足希望通过摄像头拍照的图片，然后通过服务器来展示需要
实现代码：
flex:
<div style="padding-bottom: 4px; background-color: #eeeeee; padding-left: 4px; width: 98%; padding-right: 5px; font-size: 13px; padding-top: 4px; border: #cccccc 1px solid;"><?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()" backgroundColor="#A6C9E2">
<mx:Style>
Alert{font-size:12px;}
</mx:Style>
<mx:Script>
<!
import mx.events.CloseEvent;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.controls.Alert;
import mx.core.Application;
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 DEFAULT_WEBSERVICE_URL:String = ""; //WebService地址
private var str:String;
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
private var m_pictureData:String;
private function initApp():void
{
t_btn_Shooting.enabled = false;
t_ban_Save.enabled = false;
initCamera();
DEFAULT_WEBSERVICE_URL = Application.application.parameters.contextPath+"/onLineTakePhotoServlet";
t_ws_SavePicture.url=DEFAULT_WEBSERVICE_URL;
}
//初始化摄像头
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());
var m_pictureBitmap:Bitmap = 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
//通过WebService保存
private function SavePicture():void
{
m_pictureData = "";
for(var i:int = 0; i < DEFAULT_CAMERA_WIDTH; i++)
{
for(var j:int = 0; j < DEFAULT_CAMERA_HEIGHT; j++)
{
if(m_pictureData.length > 0)
{
m_pictureData += "," + m_pictureBitmapData.getPixel32(i,j).toString();
}
else
{
m_pictureData = m_pictureBitmapData.getPixel32(i,j).toString();
}
}
}
var params:URLVariables = new URLVariables();
params.width = DEFAULT_CAMERA_WIDTH;
params.height = DEFAULT_CAMERA_HEIGHT;
params.bitmap_data = m_pictureData;
t_ws_SavePicture.send(params);
}
//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() != "保存失败")
{
str = event.result.toString();
Alert.show("保存成功,是否关闭窗口？","提示",3,this,__onAlertCloseHandler);
}
else
{
Alert.show(event.result.toString(),"提示",Alert.OK);
}
}
//连接WebService失败事件
private function __onSavePictureFault(event:FaultEvent):void
{
//Alert.show(event.fault.toString(),"提示",Alert.OK);
Alert.show("连接服务器失败。","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.YES)
{
ExternalInterface.call("setValueToField",str);
}
}
]]>
</mx:Script>
<mx:HTTPService id="t_ws_SavePicture" showBusyCursor="true" method="POST" useProxy="false" result="__onSavePictureResult(event)" fault="__onSavePictureFault(event)"/>
<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>
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