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@ -1,9 +1,7 @@
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import 'dart:async';
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import 'dart:io' show Platform;
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import 'package:barcode_scan/barcode_scan.dart';
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import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:flutter/cupertino.dart';
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import 'package:flutter/services.dart';
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import 'package:qr_code_scanner/qr_code_scanner.dart';
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class ScanPage extends StatefulWidget {
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ScanPage({Key key}) : super(key: key);
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@ -13,263 +11,27 @@ class ScanPage extends StatefulWidget {
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}
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class _ScanPageState extends State<ScanPage> {
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ScanResult scanResult;
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final _flashOnController = TextEditingController(text: "Flash on");
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final _flashOffController = TextEditingController(text: "Flash off");
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final _cancelController = TextEditingController(text: "Cancel");
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var _aspectTolerance = 0.00;
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var _numberOfCameras = 0;
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var _selectedCamera = -1;
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var _useAutoFocus = true;
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var _autoEnableFlash = false;
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static final _possibleFormats = BarcodeFormat.values.toList()
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..removeWhere((e) => e == BarcodeFormat.unknown);
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List<BarcodeFormat> selectedFormats = [..._possibleFormats];
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final GlobalKey _qrKey = GlobalKey(debugLabel: 'QR');
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QRViewController _controller;
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@override
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// ignore: type_annotate_public_apis
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initState() {
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super.initState();
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Future.delayed(Duration.zero, () async {
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_numberOfCameras = await BarcodeScanner.numberOfCameras;
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setState(() {});
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});
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void reassemble() {
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super.reassemble();
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if (Platform.isAndroid) {
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_controller.pauseCamera();
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} else if (Platform.isIOS) {
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_controller.resumeCamera();
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}
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}
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@override
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Widget build(BuildContext context) {
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var contentList = <Widget>[
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if (scanResult != null)
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Card(
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child: Column(
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children: <Widget>[
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ListTile(
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title: Text("Result Type"),
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subtitle: Text(scanResult.type?.toString() ?? ""),
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),
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ListTile(
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title: Text("Raw Content"),
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subtitle: Text(scanResult.rawContent ?? ""),
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),
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ListTile(
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title: Text("Format"),
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subtitle: Text(scanResult.format?.toString() ?? ""),
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),
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ListTile(
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title: Text("Format note"),
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subtitle: Text(scanResult.formatNote ?? ""),
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),
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],
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),
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),
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ListTile(
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title: Text("Camera selection"),
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dense: true,
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enabled: false,
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),
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RadioListTile(
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onChanged: (v) => setState(() => _selectedCamera = -1),
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value: -1,
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title: Text("Default camera"),
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groupValue: _selectedCamera,
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),
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];
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for (var i = 0; i < _numberOfCameras; i++) {
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contentList.add(RadioListTile(
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onChanged: (v) => setState(() => _selectedCamera = i),
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value: i,
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title: Text("Camera ${i + 1}"),
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groupValue: _selectedCamera,
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));
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}
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contentList.addAll([
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ListTile(
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title: Text("Button Texts"),
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dense: true,
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enabled: false,
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),
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ListTile(
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title: TextField(
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decoration: InputDecoration(
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labelText: "Flash On",
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),
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controller: _flashOnController,
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),
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),
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ListTile(
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title: TextField(
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decoration: InputDecoration(
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labelText: "Flash Off",
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),
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controller: _flashOffController,
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),
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),
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ListTile(
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title: TextField(
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decoration: InputDecoration(
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labelText: "Cancel",
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),
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controller: _cancelController,
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),
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),
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]);
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if (Platform.isAndroid) {
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contentList.addAll([
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ListTile(
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title: Text("Android specific options"),
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dense: true,
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enabled: false,
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),
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ListTile(
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title:
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Text("Aspect tolerance (${_aspectTolerance.toStringAsFixed(2)})"),
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subtitle: Slider(
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min: -1.0,
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max: 1.0,
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value: _aspectTolerance,
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onChanged: (value) {
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setState(() {
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_aspectTolerance = value;
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});
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},
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),
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),
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CheckboxListTile(
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title: Text("Use autofocus"),
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value: _useAutoFocus,
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onChanged: (checked) {
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setState(() {
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_useAutoFocus = checked;
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});
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},
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)
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]);
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}
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contentList.addAll([
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ListTile(
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title: Text("Other options"),
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dense: true,
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enabled: false,
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),
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CheckboxListTile(
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title: Text("Start with flash"),
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value: _autoEnableFlash,
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onChanged: (checked) {
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setState(() {
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_autoEnableFlash = checked;
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});
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},
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)
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]);
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contentList.addAll([
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ListTile(
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title: Text("Barcode formats"),
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dense: true,
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enabled: false,
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),
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ListTile(
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trailing: Checkbox(
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tristate: true,
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materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
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value: selectedFormats.length == _possibleFormats.length
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? true
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: selectedFormats.length == 0
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? false
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: null,
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onChanged: (checked) {
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setState(() {
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selectedFormats = [
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if (checked ?? false) ..._possibleFormats,
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];
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});
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},
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),
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dense: true,
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enabled: false,
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title: Text("Detect barcode formats"),
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subtitle: Text(
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'If all are unselected, all possible platform formats will be used',
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),
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),
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]);
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contentList.addAll(_possibleFormats.map(
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(format) => CheckboxListTile(
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value: selectedFormats.contains(format),
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onChanged: (i) {
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setState(() => selectedFormats.contains(format)
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? selectedFormats.remove(format)
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: selectedFormats.add(format));
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},
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title: Text(format.toString()),
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),
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));
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return Scaffold(
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appBar: AppBar(
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title: Text('Barcode Scanner Example'),
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actions: <Widget>[
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IconButton(
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icon: Icon(Icons.camera),
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tooltip: "Scan",
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onPressed: scan,
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)
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],
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),
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body: ListView(
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scrollDirection: Axis.vertical,
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shrinkWrap: true,
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children: contentList,
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),
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);
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}
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Future scan() async {
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try {
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var options = ScanOptions(
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strings: {
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"cancel": _cancelController.text,
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"flash_on": _flashOnController.text,
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"flash_off": _flashOffController.text,
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body: QRView(
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key: _qrKey,
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onQRViewCreated: (controller) {
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_controller = controller;
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},
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restrictFormat: selectedFormats,
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useCamera: _selectedCamera,
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autoEnableFlash: _autoEnableFlash,
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android: AndroidOptions(
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aspectTolerance: _aspectTolerance,
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useAutoFocus: _useAutoFocus,
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),
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);
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var result = await BarcodeScanner.scan(options: options);
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setState(() => scanResult = result);
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} on PlatformException catch (e) {
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var result = ScanResult(
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type: ResultType.Error,
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format: BarcodeFormat.unknown,
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);
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if (e.code == BarcodeScanner.cameraAccessDenied) {
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setState(() {
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result.rawContent = 'The user did not grant the camera permission!';
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});
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} else {
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result.rawContent = 'Unknown error: $e';
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}
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setState(() {
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scanResult = result;
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});
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}
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}
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}
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