有谁知道我可以使用Flex中的照片? 我有点失落! 我发现了一些教程,但不行呀!
Answer 1:
XpenseIt( Flex移动项目FXP下载 )示例代码提供这款相机实现。
呼叫takePicture()
来启动相机,然后从获得的图像loaderInfo.loader
。
var bitmapData:BitmapData = new BitmapData(loaderInfo.width, loaderInfo.height);
bitmapData.draw(loaderInfo.loader);
下面相机实用工具类:
类别:CameraUtil
package utils
{
import events.CameraEvent;
import flash.display.BitmapData;
import flash.display.Loader;
import flash.display.LoaderInfo;
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.MediaEvent;
import flash.filesystem.File;
import flash.filesystem.FileMode;
import flash.filesystem.FileStream;
import flash.media.CameraRoll;
import flash.media.CameraUI;
import flash.media.MediaPromise;
import flash.media.MediaType;
import flash.utils.ByteArray;
import mx.events.DynamicEvent;
import mx.graphics.codec.JPEGEncoder;
[Event(name = "fileReady", type = "events.CameraEvent")]
public class CameraUtil extends EventDispatcher
{
protected var camera:CameraUI;
protected var loader:Loader;
public var file:File;
public function CameraUtil()
{
if (CameraUI.isSupported)
{
camera = new CameraUI();
camera.addEventListener(MediaEvent.COMPLETE, mediaEventComplete);
}
}
public function takePicture():void
{
if (camera)
camera.launch(MediaType.IMAGE);
}
protected function mediaEventComplete(event:MediaEvent):void
{
var mediaPromise:MediaPromise = event.data;
if (mediaPromise.file == null)
{
// For iOS we need to load with a Loader first
loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaderCompleted);
loader.loadFilePromise(mediaPromise);
return;
}
else
{
// Android we can just dispatch the event that it's complete
file = new File(mediaPromise.file.url);
dispatchEvent(new CameraEvent(CameraEvent.FILE_READY, file));
}
}
protected function loaderCompleted(event:Event):void
{
var loaderInfo:LoaderInfo = event.target as LoaderInfo;
if (CameraRoll.supportsAddBitmapData)
{
var bitmapData:BitmapData = new BitmapData(loaderInfo.width, loaderInfo.height);
bitmapData.draw(loaderInfo.loader);
file = File.applicationStorageDirectory.resolvePath("receipt" + new Date().time + ".jpg");
var stream:FileStream = new FileStream()
stream.open(file, FileMode.WRITE);
var j:JPEGEncoder = new JPEGEncoder();
var bytes:ByteArray = j.encode(bitmapData);
stream.writeBytes(bytes, 0, bytes.bytesAvailable);
stream.close();
trace(file.url);
dispatchEvent(new CameraEvent(CameraEvent.FILE_READY, file));
}
}
}
}
文章来源: take photo using Adobe Builder (flex) for iOS