Barcode generation library for Dart/Flutter

Flutterappworld

4 years ago

barcode

Barcode generation library for Dart that can generate generic drawing operations for any backend.

If you are looking to print barcodes, use pub:pdf.
If you want to display barcodes in a Flutter application, use pub:barcode_widget.
To generate SVG barcodes see the example tab.
To generate barcodes in images, use pub:barcode_image.
Live example with Flutter Web: https://davbfr.github.io/dart_barcode/

They all use this library to generate the drawing operations.

Interactive demo: https://davbfr.github.io/dart_barcode/

This library is the base to create flutter widgets or pdf barcodes. It depends only on dart with no platform-dependent implementation.

Only two basic drawing primitives are required:

Filled rectangle to draw the bars
Text drawing to display the code in full-text

Generate barcodes

// Create a DataMatrix barcode
final dm = Barcode.dataMatrix();

// Generate a SVG with "Hello World!"
final svg = bc.toSvg('Hello World!', width: 200, height: 200);

// Save the image
await File('barcode.svg').writeAsString(svg);

Create a WIFI configuration barcode:

// Create a DataMatrix barcode
final dm = Barcode.dataMatrix();

final me = MeCard.wifi(
  ssid: 'Wifi Name',
  password: 'password',
);

// Generate a SVG with a barcode that configures the wifi access
final svg = bc.toSvg(me.toString(), width: 200, height: 200);

// Save the image
await File('wifi.svg').writeAsString(svg);