Generate barcode in android app using Zxing.

Recently I was working on a wallet app as a freelancer where I had to implement a barcode generator in the customer side of the app which enables easy transactions. I used Zxing library for generating QRcode. It is very easy and QR code can be generated within a few lines of code.

First, add the following dependencies in the build.gradle file of app directory.

compile 'com.google.zxing:core:3.2.1'
compile 'com.journeyapps:zxing-android-embedded:3.2.0@aar'

After that, you can create an ImageView in your layout file and generate the QR code using following snippet.

String text="" // Whatever you need to encode in the QR code
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
try {
    BitMatrix bitMatrix = multiFormatWriter.encode(text, BarcodeFormat.QR_CODE,200,200);
    BarcodeEncoder barcodeEncoder = new BarcodeEncoder();
    Bitmap bitmap = barcodeEncoder.createBitmap(bitMatrix);
    imageView.setImageBitmap(bitmap);
} catch (WriterException e) {
    e.printStackTrace();
}

I created a demo application which you can find in this repository.

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