qr-code

问题 I am trying to link a QR code to open a video. At the moment I have used a QR generator to point to the video file URL. But when using it on my phone it asks me to click the link first. Is the the functionality of the QR code reader, or is there a way to program the QR image to bypass this and directly open the video player? Also, with the current functionality, it works on Android, but opening in iPhone (using the QR code) doesn't play any sound. If on the iPhone I go straight to the URL,

问题 I try to read QRcode with react native then I install library and this is my code 'use strict'; var React = require('react-native'); var { AppRegistry, StyleSheet, Text, View, TouchableOpacity, NavigatorIOS, } = React; var QRCodeScreen = require('./QRCodeScreen'); var cameraApp = React.createClass({ render: function() { return ( <NavigatorIOS style={styles.container,{ width:100,height:500}} initialRoute={{ title: 'Index', backButtonTitle: 'Back', component: Index, }} /> ); } }); var Index =

问题 I have implemented a QR scanner(QRScanner class) using Google Vision API. Once a value is detected it is passed to another activity(Info class) using Intents. The problem is that once a QR code is scanned the Info class gets opened several times.I want to limit the QRScanner class to get only one QR value and Info classed to be opened only once. QRScanner Class @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity

问题 Here in my code there are two Textinput where whatever i write and press TouchableOpacity , it generates QRCode , now when I am pressing QRCode for long time ,it is asking for gallery permission , but after that not save or download , Seriously I need help , Please . This is the git link , i have uploaded full code "https://github.com/abhigyan9301/QRCode" import React, { Component } from 'react'; //import react in our code. import { StyleSheet, View,TextInput, TouchableOpacity, Text,} from

问题 Now I would like to generate QR Code dynamically from the UUID from the device. I am wonder how to do it in order to support multi-platform in gluon? Please also recommended me If I simplfy using normall java library or special lib which developed by gluon Team. 回答1: You can use the Zxing library to generate the QR on your device. This is the same library that is used by the Charm Down BarcodeScan service on Android. First of all, add this dependency to your build: compile 'com.google.zxing

问题 I am using Laravel 5.2 and Simple QR code library for creating QR code. It works fine. Now i want to download generated QR code. Inspect element shows: I can save this image, right click on image>save image . But i want to make a link so that i can download this image with clicking download link button. Same as: this mycode for creating qr code: <div class="text-center"> <img src="data:image/png;base64, {!! base64_encode(QrCode::format('png')->size(100)->generate('helloworld')) !!} "> <p>Scan

问题 I'm having an invalid encoding error that doesn't let me save the image to a carrierwave uploader. require 'rqrcode_png' img = RQRCode::QRCode.new( 'test', :size => 4, :level => :h ).to_img.to_s img.valid_encoding? => false 回答1: I'm not sure if this is what you're looking for, in my case I needed to associate the generated QR code with a Rails model using carrierwave, what I ended up doing was saving the image to a temp file, associating that file with the model and afterwards deleting the

问题 Currently, I'm using ZXing to generate QR Codes. I have no problems in generating and reading the codes, and can change the colour scheme without any issues. I was wondering if it is possible to change the shape of the generated codes from the traditional squares to 'dots' or circles using ZXing? I've seen images and examples of this, but I haven't seen any example solutions using ZXing. Looking for something like: If it is possible to do with ZXing? I would appreciate any example code. 回答1:

问题 I'm trying to generate and display QR code using ZXing package, I tried in following code I was not able to show QR code. It's showing blank image (transparent). private void OnGenerateQRCodeButton_Clicked(object sender, EventArgs e) { var writer = new BarcodeWriter { Format = BarcodeFormat.QR_CODE, Options = new EncodingOptions { Height = (int)imageCompanyLogo.Height, Width = (int) imageCompanyLogo.Width, Margin = 0, PureBarcode = true } }; var bitmap = writer.Write("www.helloworld.com");

问题 I need to know how to calculate the positions of the QR Code alignment patterns as defined in the table of ISO/IEC 18004:2000 Annex E. I don't understand how it's calculated. If you take the Version 16, for example, the positions are calculated using {6,26,50,74} and distance between the points are {20,24,24}. Why isn't it {6,28,52,74}, if the distances between the points, {22,24,22}, is distributed more equally? I would like to know how this can be generated procedurally. 回答1: While the