QR Code – Quick Response Code, is a popular 2d barcode that can store up to about 3000 bytes.
There are 40 versions of QR Codes and 4 error correction levels.
New Android and iOS devices have built-in support for reading QR codes in the default camera app.
QR codes can help bridge the physical world with the online world.
Generating QR codes in B4X is very simple with QRGenerator class: https://www.b4x.com/android/forum/threads/b4x-qrgenerator-cross-platform-qr-code-generator.93092/#content
Reading QR codes:
B4A – https://www.b4x.com/android/forum/t…on-google-play-services-vision.89705/#content
There are other libraries as well.
B4i – https://www.b4x.com/android/forum/threads/ibarcode-library.47354/#content