android - FLEX - ZXing - Android、移动 - 条码读取器

Question

基于http://www.remotesynthesis.com/post.cfm/adding-a-qr-code-reader-in-flex-on-android和 zxing 客户端示例代码，我尝试创建一个可以读取任何类型代码的应用程序。但在我的设备上，它在使用 Qrcode 时工作正常，但不适用于任何其他类型的代码，特别是条形码；我哪里错了？这是代码 -

<?xml version="1.0" encoding="utf-8"?>
<s:View xmlns:fx="http://ns.adobe.com/mxml/2009" 
        xmlns:s="library://ns.adobe.com/flex/spark" title="Scanner">

    <fx:Script>
        <![CDATA[
            import mx.core.BitmapAsset;
            import com.google.zxing.common.BitMatrix;
            import com.google.zxing.BarcodeFormat;
            import com.google.zxing.BinaryBitmap;
            import com.google.zxing.BufferedImageLuminanceSource;
            import com.google.zxing.DecodeHintType;
            import com.google.zxing.MultiFormatReader;
            import com.google.zxing.Result;
            import com.google.zxing.client.result.ParsedResult;
            import com.google.zxing.client.result.ResultParser;
            import com.google.zxing.common.GlobalHistogramBinarizer;
            import com.google.zxing.common.flexdatatypes.HashTable;
            //import com.google.zxing.oned.EAN13Reader;
            //import com.google.zxing.qrcode.QRCodeReader;

            import flashx.textLayout.tlf_internal;

            protected var camera:Camera;
            private var videoDisplay:Video = new Video(300, 300);
            private var myReader:MultiFormatReader;
            private var bmd:BitmapData;
            private var cameraStarted:Boolean = false;


            protected function start_camera(event:MouseEvent):void
            {
                myReader = new MultiFormatReader();

                if(!cameraStarted){
                    if(Camera.isSupported) {
                        camera = Camera.getCamera();
                        camera.setMode(300, 300, 15);

                        videoDisplay.x = 295;
                        sv.addChild(videoDisplay);

                        videoDisplay.attachCamera(camera);
                        videoDisplay.rotation = 90;

                        btn.label = "Scan Now";
                        lbl.text = "";
                        cameraStarted = true;
                    } else {
                        lbl.text = "No camera found";
                    }
                } else {
                    decodeSnapshot();
                }
            }

            public function decodeSnapshot():void {
                lbl.text = "Checking...";
                bmd = new BitmapData(300, 300);
                bmd.draw(videoDisplay, null, null, null, null, true);
                videoDisplay.cacheAsBitmap = true;
                videoDisplay.cacheAsBitmapMatrix = new Matrix;
                decodeBitmapData(bmd, 300, 300);
                bmd.dispose();
                bmd=null;
                System.gc();
            }

            public function decodeBitmapData(bmpd:BitmapData, width:int, height:int):void {
                var lsource:BufferedImageLuminanceSource = new BufferedImageLuminanceSource(bmpd);
                var bitmap:BinaryBitmap = new BinaryBitmap(new GlobalHistogramBinarizer(lsource));

                var ht:HashTable = null;
                ht = this.getAllHints();

                var res:Result = null;
                try {
                    res = myReader.decode(bitmap, ht);
                } 

                catch (event:Error) {

                }

                if (res == null) {
                    videoDisplay.clear();
                    lbl.text = "Nothing decoded";
                } else {
                    var parsedResult:ParsedResult = ResultParser.parseResult(res);
                    lbl.text = parsedResult.getDisplayResult();
                    sv.removeChild(videoDisplay);
                    cameraStarted = false;
                    btn.label = "Start Camera";
                }

            }

            private function getAllHints():HashTable {
                var ht:HashTable = new HashTable;
                //ht.Add(DecodeHintType.POSSIBLE_FORMATS, BarcodeFormat.EAN_13);
                return ht;
            }
        ]]>
    </fx:Script>
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <s:VGroup height="100%" width="100%" top="0" right="0" bottom="0" left="0" horizontalAlign="center">
        <s:VGroup width="100%" height="300" horizontalAlign="center" id="vg">
            <s:SpriteVisualElement id="sv" width="300" height="200" />
        </s:VGroup>
        <s:VGroup horizontalAlign="center" >
            <s:Button id="btn" width="220" height="36" label="Start Camera"
                      click="start_camera(event)"/>
            <s:Label id="lbl" x="106" y="291" text=""/>
        </s:VGroup>
    </s:VGroup>
</s:View>

Answer 1

您的camera.setMode(300, 300, 15);错误，请使用:

this.camera.setMode( 320, 240, 15, true );

请记住，AS3 版本的检测不如 zxing 的原生 Android 代码那么强大。

编辑:读错了你的帖子，你必须添加你想要的格式的哈希并将其插入哈希数组。