qr.dart

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:images_picker/images_picker.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:qrscan/qrscan.dart' as scanner;

class QrScanPage extends StatefulWidget {
  const QrScanPage({Key key}) : super(key: key);

  @override
  _QrScanPageState createState() => _QrScanPageState();
}

class _QrScanPageState extends State<QrScanPage> {
  String code;

  Future _scan() async {
    await Permission.camera.request();
    String barcode = await scanner.scan();
    if (barcode == null) {
      print('nothing return.');
    } else {
      code = barcode;
    }
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("QR Scan Page"),
      ),
      body: Center(
        child: Text(
          code ?? "Code Akan Muncul Disini",
          style: TextStyle(fontWeight: FontWeight.bold),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.qr_code),
        onPressed: () => _scan(),
      ),
    );
  }
}