flutter_barcode_scanner_sit 1.0.7

A plugin for barcode scanning support on Android and iOS. Supports barcodes, QR codes, etc.

example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_barcode_scanner_sit/flutter_barcode_scanner.dart';
import 'package:local_auth/local_auth.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _scanBarcode = 'Unknown';

  @override
  void initState() {
    super.initState();
  }

  Future<void> startBarcodeScanStream() async {
    FlutterBarcodeScanner.getBarcodeStreamReceiver(
            '#ff6666', 'Cancel', true, ScanMode.BARCODE)!
        .listen((barcode) => print(barcode));
  }

  Future<void> scanQR() async {
    String barcodeScanRes;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      barcodeScanRes = await FlutterBarcodeScanner.scanBarcode(
          '#ff6666', 'Cancel', true, ScanMode.QR);
      print(barcodeScanRes);
    } on PlatformException {
      barcodeScanRes = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _scanBarcode = barcodeScanRes;
    });
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> scanBarcodeNormal() async {
    String barcodeScanRes;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      barcodeScanRes = await FlutterBarcodeScanner.scanBarcode(
          '#ff6666', 'Cancel', true, ScanMode.BARCODE);
      print(barcodeScanRes);
    } on PlatformException {
      barcodeScanRes = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _scanBarcode = barcodeScanRes;
    });
  }

  Future<void> _authenticate() async {
    final LocalAuthentication auth = LocalAuthentication();

    bool authenticated = false;
    try {
      authenticated = await auth.authenticate(
        localizedReason: 'Let OS determine authentication method',
        options: const AuthenticationOptions(
          stickyAuth: true,
        ),
      );
      print(authenticated.toString());
    } on PlatformException catch (e) {
      print(e);
      return;
    }
    if (!mounted) {
      return;
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: const Text('Barcode scan')),
        body: Builder(builder: (BuildContext context) {
          return Container(
              alignment: Alignment.center,
              child: Flex(
                  direction: Axis.vertical,
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    ElevatedButton(
                        onPressed: () => scanBarcodeNormal(),
                        child: Text('Start barcode scan')),
                    ElevatedButton(
                        onPressed: () => scanQR(),
                        child: Text('Start QR scan')),
                    ElevatedButton(
                        onPressed: () => startBarcodeScanStream(),
                        child: Text('Start barcode scan stream')),
                    ElevatedButton(
                        onPressed: () => _authenticate(),
                        child: Text('_authenticate')),
                    Text('Scan result : $_scanBarcode\n',
                        style: TextStyle(fontSize: 20))
                  ]));
        }),
      ),
    );
  }
}