QR.Flutter is a Flutter library for simple and fast QR code rendering via a Widget or custom painter.
- Built on QR - Dart
- Supports QR code versions 1 - 40
- Error correction / redundancy
- Configurable output size, padding, background and foreground colors
- Export to image data to save to file or use in memory
- No internet connection required
If you're using Flutter 1.2+ or the master/beta channel then you will need to use version
2.0.0 or higher as Flutter 1.2 is not compatible with earlier versions of the Flutter framework.
dependencies: qr_flutter: ^2.0.0
If you're using an older Flutter version (< 1.2.1), you must use version
1.1.6 if you cannot upgrade to the latest version of Flutter:
dependencies: qr_flutter: ^1.1.6
Note: If you're using the Flutter
master channel, if you encounter build issues, or want to try the latest and greatest then you should use the
master branch and not a specific release version. To do so, use the following configuration in your
dependencies: qr_flutter: git: url: git://github.com/lukef/qr.flutter.git
Keep in mind the
master branch could be unstable.
After adding the dependency to your
pubspec.yaml you can run:
flutter packages get or update your packages using
To start, import the dependency in your code:
Next, to render a basic QR code you can use the following code (or something like it):
new QrImage( data: "1234567890", size: 200.0, ),
Depending on your data requirements you may want to tweak the QR code output. The following options are available:
|int||A value between 1 and 40. See http://www.qrcode.com/en/about/version.html for details.|
|int||A value defined on |
|double||The (square) size of the image. If not given, will auto size using shortest size constraint.|
|EdgeInsets||Padding surrounding the QR code data|
|Color||The background color (default is none)|
|Color||The foreground color (default is black)|
|bool||Adds an extra pixel in size to prevent gaps (default is true)|
example directory for a basic working example.
Has it been tested in production? Can I use it in production?
Yep! It's stable and ready to rock. It's currently in use in quite a few production applications including:
Thanks to Kevin Moore for his awesome QR - Dart library. It's the core of this library.
For author/contributor information, see the
QR.Flutter is released under a modified MIT license. See
LICENSE for details.