Question

Im looking into trying to incorportate QR codes into my java program. I want them to be the user input and each code will have a numerical value. For example code_A = 1 and code_B = 5 or something like that. Where can i learn how to do this? Or do any of you have any experience incorporating these QR codes into java.

I was thinking maybe setting up a place to store the value of each QR code, maybe storing them as text documents and then when the QR code is read into the program it tells the program to read the value from the text document. Probably not the most effieient way, but so far it seems the most logical way that I can come up with.

Thanks in advance to anyone who can help!

Answer 1

Like the comments on your question say: I dont really get what you are trying to do.

ZXing is definitely the right library to use. With it you can create QRCodes as follows.

Quick and dirty example:

    // create QR code
    BitMatrix bitMatrix = new QRCodeWriter().encode("Text in QRCode", BarcodeFormat.QR_CODE, 15, 15);
    // save as image
    String path = "path/on/disc"
    File img = new File(path);
    FileOutputStream fos = new FileOutputStream(img);
    MatrixToImageWriter.writeToStream(bitMatrix, "gif", fos);
    fos.close();

In the end its your choice what content/source you’ll put in this code (as long as it is a String).

No offense: You should consider asking questions more general in case you’re not able to give or have enough information.

Anyway, I hope this helped! Have Fun!