Flutter QR

Flutter QR is a library built for Flutter developers that allows their apps to generate and scan QR codes with ease. It supports both QR code generation and scanning out of the box, making it a convenient tool to integrate into your Flutter projects.

Features

• Generate QR codes with custom data and settings.
• Scan QR codes from camera input.
• Supports button animations and sound effects.
• Lightweight and easy to use.

Installation

Add the following line to your pubspec.yaml file:

dependencies:
  flutter_qr: ^0.1.0

Then run flutter packages get in your terminal.

Usage

QR Code Generator

To generate a QR code with Flutter QR, use the QrImage widget. Here's an example:

import 'package:flutter_qr/flutter_qr.dart';
import 'package:flutter/material.dart';

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: QrImage(
        data: "https://www.google.com/",
        version: QrVersions.auto,
        size: 200.0,
        gapless: false,
        errorStateBuilder: (cxt, err) {
          return Container(
            child: Center(
              child: Text(
                "Uh oh! Something went wrong...",
                textAlign: TextAlign.center,
              ),
            ),
            color: Colors.white,
          );
        },
      ),
    );
  }
}

QR Code Scanner

To scan a QR code with Flutter QR, use the QRView widget. Here's an example:

import 'package:flutter_qr/flutter_qr.dart';
import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  GlobalKey qrKey = GlobalKey();
  QRViewController controller;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: QRView(
        key: qrKey,
        onQRViewCreated: _onQRViewCreated,
        overlay: QrScannerOverlayShape(
          borderColor: Colors.red,
          borderRadius: 10,
          borderLength: 30,
          borderWidth: 10,
          cutOutSize: 300,
        ),
      ),
    );
  }

  void _onQRViewCreated(QRViewController controller) {
    this.controller = controller;
    controller.scannedDataStream.listen((scanData) {
      print(scanData);
    });
  }

  @override
  void dispose() {
    controller?.dispose();
    super.dispose();
  }
}

For more information on how to use Flutter QR, please refer to the official documentation.