QR-Scanner | QR code decoding program , takes input | QRCode Processing library
kandi X-RAY | QR-Scanner Summary
kandi X-RAY | QR-Scanner Summary
QR code decoding program, takes input from your device or from built-in camera using Opencv , zbar..
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Community Discussions
Trending Discussions on QR-Scanner
QUESTION
I am trying to implement QR scanner to scan for QR code using angular2-qrscanner. After doing what it says in the documentation, I am gettting the error
"Cannot read property 'getMediaDevices' of undefined "
on the console. These are my codes.
AppModule.ts
...ANSWER
Answered 2021-May-26 at 12:33Try with ngAfterViewInit()
. It is called after the view is initially rendered. This is why @ViewChild()
depends on it.
QUESTION
Problem : So I'm using this npm package react-qr-scanner to scan QR codes in my PWA. Now this is a react based package. The react component(just an example) is like:
...ANSWER
Answered 2021-Apr-18 at 16:04If you want to extend react-qr-scanner
you should fork it on github, you could import in locally to test and then publish it if you like, you could use as a private repo too
QUESTION
I'm using the https://github.com/nimiq/qr-scanner for scanning QR codes. It uses a smaller rectangle from the whole video for scanning the codes.
This rectangle is a centered square of two thirds of the video width or height, whichever is smaller.
I want to show a div with red border to show the user where is this scan region. How can I do it in css without calculating the top, left, width and height in JS?
...ANSWER
Answered 2021-Feb-08 at 11:02Not exactly what you want, but I think this may give you some hints. 40% of the viewport shorter size. You can fix percentage by changing value of the --side
which is a CSS variable ex. --side: min(30vw, 30vh)
will be 30% of the sorter side
QUESTION
I'm experimenting with svelte using it's template (https://github.com/sveltejs/template/) as starting point.
And I wanted to scan qr codes with https://github.com/nimiq/qr-scanner, but on my pc I don't have a webcam and my phone doesn't want to start the qrScanner because the page isn't served from https.
when I run npm run dev
I get:
ANSWER
Answered 2020-Nov-20 at 18:17I have encountered this issue before, the solution was to get chrome/firefox to allow camera access through HTTP
try this answer
alternatively there are tutorial on the web on how to add a certificate for localhost to served on HTTPS
QUESTION
Here is my TS code where StartScannig() is used to start the qrscanner and Scan() is for the barcode scanner.
...ANSWER
Answered 2020-Jun-09 at 09:52Please check your manifest code again, you have doubles there.
This two are doubles.
QUESTION
I want to open a camera scanner and below is code that working properly in android but in ios getting an error
TypeError: undefined is not an object (evalution 'navigation.mediaDevices.getUserMedia')
here is the full tutorial links https://devdactic.com/pwa-qr-scanner-ionic/ A small help is much appreciated
...ANSWER
Answered 2020-Jul-14 at 11:50getUserMedia
is not available on WKWebView
, which Capacitor uses. So you won't be able to use it unless Apple makes getUserMedia
available in the future.
QUESTION
I am trying to test if the qr-scanner for my Ionic 4 app is working so I need to test my application on an android device (tablet). I used the command: ionic cordova run android in my Visual Studio Code command prompt but I keep getting errors. My latest error is:
cordova.cmd run android Checking Java JDK and Android SDK versions ANDROID_SDK_ROOT=undefined (recommended setting) ANDROID_HOME=C:\Users\Me\AppData\Local\Android\Sdk (DEPRECATED) Could not find an installed version of Gradle either in Android Studio, or on your system to install the gradle wrapper. Please include gradle in your path, or install Android Studio [ERROR] An error occurred while running subprocess cordova. cordova.cmd run android exited with exit code 1. Re-running this command with the --verbose flag may provide more information.
I have downloaded/installed and configured Android Studio, Java jdk, Gradle and Cordova as all the solutions I have tried suggests but I keep getting more errors as I progress. Even after setting the user environmental variable ANDROID_HOME and system environmental variable PATH and restarting my computer.
...ANSWER
Answered 2020-Jun-02 at 14:45Your problem is most likely that you are not running your Visual Studio Code as Admin. So it cannot access the displayed paths.
Regards, Markus
QUESTION
I'm creating an ionic capacitor application. In my app I have to use QR Scanner so I used https://ionicframework.com/docs/native/qr-scanner plugin to integrate qr scanner. Then I do ionic capacitor copy android
and ionic capacitor open android
. Then in android studio when I try to build it throws
capacitor-cordova-android-plugins/src/main/java/com/bitpay/cordova/qrscanner/QRScanner.java -cannot find symbol class ActivityCompat -cannot find symbol variable ActivityCompat
Ionic version is 6.4.0 and android studio version is 3.6.2
Can some one help me to solve this.
...ANSWER
Answered 2020-Apr-09 at 12:10Capacitor 2.0 uses Android X, that means all plugins have to use Android X too and that one is not updated.
As workarounds you can use Capacitor 1.5.2 or use jetifier to patch plugins to use Android X.
QUESTION
I did initially add this code to my index.html
:
ANSWER
Answered 2020-Feb-27 at 14:46METHOD 1
Try to run:
QUESTION
I'm struggling to pass const navigation = useNavigation();
properly to my outer function.
Currently, I have this 'main' function:
...ANSWER
Answered 2020-Mar-03 at 10:21update code:
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Install QR-Scanner
You can use QR-Scanner like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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