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@mehmetf @a14n @YAPPDEF @sarbagyastha @mklim @karan-rawal
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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// ignore_for_file: public_member_api_docs
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.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> {
final LocalAuthentication auth = LocalAuthentication();
bool _canCheckBiometrics;
List<BiometricType> _availableBiometrics;
String _authorized = 'Not Authorized';
bool _isAuthenticating = false;
Future<void> _checkBiometrics() async {
bool canCheckBiometrics;
try {
canCheckBiometrics = await auth.canCheckBiometrics;
} on PlatformException catch (e) {
print(e);
}
if (!mounted) return;
setState(() {
_canCheckBiometrics = canCheckBiometrics;
});
}
Future<void> _getAvailableBiometrics() async {
List<BiometricType> availableBiometrics;
try {
availableBiometrics = await auth.getAvailableBiometrics();
} on PlatformException catch (e) {
print(e);
}
if (!mounted) return;
setState(() {
_availableBiometrics = availableBiometrics;
});
}
Future<void> _authenticate() async {
bool authenticated = false;
try {
setState(() {
_isAuthenticating = true;
_authorized = 'Authenticating';
});
authenticated = await auth.authenticateWithBiometrics(
localizedReason: 'Scan your fingerprint to authenticate',
useErrorDialogs: true,
stickyAuth: true);
setState(() {
_isAuthenticating = false;
_authorized = 'Authenticating';
});
} on PlatformException catch (e) {
print(e);
}
if (!mounted) return;
final String message = authenticated ? 'Authorized' : 'Not Authorized';
setState(() {
_authorized = message;
});
}
void _cancelAuthentication() {
auth.stopAuthentication();
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Plugin example app'),
),
body: ConstrainedBox(
constraints: const BoxConstraints.expand(),
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Text('Can check biometrics: $_canCheckBiometrics\n'),
RaisedButton(
child: const Text('Check biometrics'),
onPressed: _checkBiometrics,
),
Text('Available biometrics: $_availableBiometrics\n'),
RaisedButton(
child: const Text('Get available biometrics'),
onPressed: _getAvailableBiometrics,
),
Text('Current State: $_authorized\n'),
RaisedButton(
child: Text(_isAuthenticating ? 'Cancel' : 'Authenticate'),
onPressed:
_isAuthenticating ? _cancelAuthentication : _authenticate,
)
])),
));
}
}
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