Most voted "qrcode" questions
QR code is a bar code, which was created in 1994, and has this name because it gives the ability to be interpreted quickly by people. QR stands for "Quick Response" which means quick response.
Learn more…37 questions
Sort by count of
-
7
votes3
answers8188
viewsValidity of a QR Code
I have a QR Code that leads to a link. This link, I suppose, will be on the air until 2015. Of course, when the link doesn’t exist, this QR Code will get you nowhere. My question is: Does this code…
qrcodeasked 9 years, 10 months ago Felipe Viero Goulart 3,693 -
5
votes1
answer1595
viewsIdentify if your computer has a QR Code reader
The first stage of registration of my project has two layout options: one for those who have QR Code reader (web cam) and another for those who do not have. I need to identify if the user’s browser…
-
3
votes1
answer9329
viewsExcel - Create QR Code with 4 cell data
Good, I am trying to create a document in Excel that will fetch the entered data for example (B1, B2, B3, B4) and with this data generate a Qrcode. I don’t have any software yet that creates Qrcode.…
-
3
votes1
answer2198
viewsandroid QRCODE reader
Guys, I need to put a qrcode reader in my android app, can someone give me a hint? I don’t want it to open another app, I want it to be within the app itself
-
2
votes2
answers1576
viewsBring QR Code data to my fields
I am reading a QR Code as code below: // Botão para abrir câmera e usar o QR Code (Irá abrir a Store para baixar um app nativo) btnQR = (Button) findViewById(R.id.btnQR);…
-
2
votes0
answers687
viewsDatabase with QRCODE
Good morning guys, I want to generate a QRCODE that pulls information from a database, on android I will make the QRCODE reader using some api zxing or Barcode. Has anyone ever done anything like?…
-
2
votes3
answers791
viewsHelp with QR Code reader in Cordova
I’m trying to make the app (Cordova + Onsen) read a QR Code and when reading open the link contained in the QR, but instead open the link it tries to open a page at the application root…
-
2
votes1
answer865
viewsprint Qrcode directly Zebra printer by python
I am generating qrcodes by python, only that I want to print directly on zebra label printer, I can already print words contained in an entry, but when I try to print the error qrcode: code: def…
-
2
votes2
answers957
viewsQR Code reader embedded in my own Activity
I need to implement a QR code reader in my Activity, ie NO REDIRECT. Using Zxing will not solve my problem. To get an idea, see in your application Whatsapp, in Whatsapp Web function: There is an…
-
2
votes0
answers30
viewsRun an asynchronous function in React-Nactivate only the first time it is called
I am using the function of the expo-camera Camera component onBarCodeScanned={(event) => { handleQRCode(event); }} And every time there’s a bar code he calls me handleQRCode, but just passing the…
-
1
votes1
answer1809
viewsHow to turn an image into a qr code with Zxing?
I’m developing an android app capable of generating and reading qr codes, the application already encodes and decodes strings, but now I need to do this with images. I’ve tried some paths like…
-
1
votes1
answer4207
viewsIs there an API to work with QR code?
I need to read a QR code and check in an app I’m developing for Android. Is there any API ready to work with QR code?
-
1
votes0
answers1335
viewsExtract data from a QR Code after reading
I have an app in the Play Store developed for a non-profit NGO, where tax coupons are donated and stored in an Excel spreadsheet each record, where it contains: CNPJ Date of Purchase COO Note value…
-
1
votes0
answers51
viewsrqrcode_png Rails controller - Passing the string contained in the database by parameter
How do I pass the value that is in the field "codigo" of table "mesas" to the space Below "VALOR_STRING_BANCO"? How do I pass the value found in the field "codigo" table "mesas" into the space below…
-
1
votes0
answers99
viewsTotalcross: Generation of QR Code
For kindness, it is possible to generate QR Code through Totalcross code? If so, how should I implement? Which class/interface should I use? If not, any predictions of making this feature available?…
-
1
votes1
answer192
viewsPHP Qrcode how to make it bigger
I am generating a Qrcode through lib phpqrcode. I know you have the sizes L, H and others. But, are there ways to make the image bigger using other settings? Because, even on H is small for my need.…
-
1
votes2
answers555
viewsBarcodedetector does not detect barcode and camera does not focus (I have already put the permissions in the manifest)
Good morning, I’m trying to integrate a barcode reader into my application but I’m not getting the camera to detect the barcode, or Qrcode or anything. I also noticed that the camera does not focus,…
-
1
votes1
answer641
viewsQR Code ZXING reader in HTML - WEBQR
I am trying to implement the reader in my web application as well as in the site "webqr.com", I copied the complete site from index.html to scripts(2). until then all right I access the server…
-
1
votes1
answer601
viewsHow to print Qrcode on Epson TM T20 VB.NET printer
I’m trying to print a QR Code on the Epson TM-T20 printer using the VB.NET language and it is returning several characters on the electronic tax coupon reel, could someone help me? Follow the code…
-
1
votes0
answers67
viewsDecode Qrcode
I’m studying a little Iot and I’m trying to create a "door opener" by Qrcode(when someone shows a Qrcode to camera, it will identify and open the door) But the camera I have at home is a Logitech…
-
1
votes0
answers1657
viewsReader of Qrcode Javascript
I’m using the QR Scanner to try to read QR codes through device cameras mobile, however the device’s camera is detected but does not show any camera image in the application. Device has camera: true…
-
1
votes0
answers134
viewsInterpret QR-Code code
Good afternoon, everyone. I’m working on a project that aims to use the QR-Code system. In short, I created a website whose there is a button that when clicking, opens the camera of the mobile…
-
1
votes1
answer29
viewsQrcode class working only within route file
Inside the route file the following code works normally: QrCode::format('png') ->size(400) ->color(0,0,0,100) ->backgroundColor(255,255,255,0) ->margin(20) ->generate('google.com',…
-
0
votes0
answers174
viewsHow to change webcam focus while streaming?
I’m creating an electronic point system based on Qrcode and ended up locking because I can’t focus Qrcode when I’m on a mobile phone for example. I say this because on webcam there is the…
-
0
votes0
answers143
viewsDelphi Datamatrix Static size
I am working with Data Matrix I am using the Unit Datamatrixbarcode, dmtx. var options:DatamatrixEncodeOptions; options := InitializeDatamatrixEncodeOptions; options.moduleSize := 4;…
-
0
votes1
answer188
viewsMaximum size of Qrcode
I am implementing in a project a reader and generator of Qrcodes and I came to doubt, how long a Qrcode can store? I could get something around 3 pages of text?
qrcodeasked 6 years, 1 month ago Woton Sampaio 1,461 -
0
votes1
answer358
viewsXzing with Xamarin Forms
Hello I’m trying to implement barcode reading in my Xamarin.Forms app according to the documentation. https://components.xamarin.com/gettingstarted/zxing.net.mobile , but when I try to execute the…
-
0
votes1
answer1055
viewsDownload images
I have the following code: <section class="margem-base-80 coluna sombra-suave" id="recipiente-topo"> <h1 class="margem-topo-50 recipiente letra-branca">Gerar QRcode…
-
0
votes0
answers58
viewsZxing Colorful . net
I need to create a color qrcode using zxing.net however I can’t and I can’t find 1 tutorial on the internet even searching and trying for days, Does anyone have any idea how to develop 1 color…
-
0
votes0
answers147
viewsAdd Qrcode to PDF
I am generating a PDF with answers from a form using jspdf, the PDF generates correctly, but I was adding a Qrcode to be used as control and validation of them, but I can’t find anything about how…
-
0
votes1
answer132
viewsQrcode appears generated as incorrect image
I started looking for libraries to generate qr codes and I came across this: https://github.com/endroid/qr-code, seemed to me quiet to apply and so I opted for it (and for being in php). The problem…
-
0
votes1
answer458
viewsiPhone does not read accents correctly in QR CODE that works normally on Android
I am generating a QR code from a VCARD using PHP QR Code (http://phpqrcode.sourceforge.net) and works perfectly (taking out a problem while saving in SVG I will search better first). Anyway, at the…
-
0
votes1
answer109
viewstake the result of one function and send via post in another
I am using the lib instascan to read qr code. but I am unable to send the result via post with ajax. anyone can help? The code I’m using is below: qr <h1>qr scanner</h1> <video…
-
0
votes0
answers160
viewsHow to Generate Qrcoder Image on screen using C# . NET Aspx with Qrcoder library
Metodo utilizando a biblioteca QRCoder. using QRCoder. public class GerarQRCoder { public static void GerarQR(TextBox txtQRCode) { string Cd = txtQRCode.Text.ToString(); QRCodeGenerator qrGenerator…
-
-1
votes1
answer78
viewsDisplay qrcode in an alert
I have this code: $("#exemplo1").click(function(){ $('#codigoQrCode').qrcode(JSON.stringify('teste')); //se vcs clicarem aqui, aparecerá o qrcode(canvas) }); $("#exemplo2").click(function(){…
-
-2
votes1
answer22
viewsQRCODE Having Ireport Problems
My Qrcode is printing as follows on iReport, this way is in trouble: Correct would be in this format: I have already realized all the necessary configurations for the operation of it. 1 - I added…
-
-3
votes1
answer110
viewsHow to generate a qrCode from a url
url = https://staging.coinwise.io/api/invoice/v1/invoice/koy-intel-juridica/default-btc?value=0.05 Json:…