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cloudsolutions-atoms/lib/nfc/nfc_reader_sheet.dart

263 lines
7.1 KiB
Dart

import 'dart:async';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:nfc_manager/nfc_manager.dart';
import 'package:nfc_manager/nfc_manager_android.dart' show NfcAAndroid, NfcBAndroid;
import 'package:nfc_manager/nfc_manager_ios.dart' show MiFareIos, Iso15693Ios;
void showNfcReader(BuildContext context, {required Function(String? nfcId) onNcfScan}) {
showModalBottomSheet(
context: context,
enableDrag: false,
isDismissible: false,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(topLeft: Radius.circular(12), topRight: Radius.circular(12)),
),
backgroundColor: Colors.white,
builder: (context) {
return NfcLayout(
onNcfScan: onNcfScan,
);
},
);
}
class NfcLayout extends StatefulWidget {
final Function(String? nfcId) onNcfScan;
const NfcLayout({super.key, required this.onNcfScan});
@override
_NfcLayoutState createState() => _NfcLayoutState();
}
class _NfcLayoutState extends State<NfcLayout> {
bool _reading = false;
Widget? mainWidget;
String? nfcId;
@override
void initState() {
super.initState();
_startNfcSession();
}
@override
void dispose() {
// Ensure session is stopped when widget is disposed
NfcManager.instance.stopSession().catchError((e) {
print('Error stopping NFC session in dispose: $e');
});
super.dispose();
}
void _startNfcSession() async {
// Stop any existing session before starting a new one
try {
await NfcManager.instance.stopSession();
} catch (e) {
print('No active session to stop: $e');
}
NfcManager.instance.startSession(
onDiscovered: (NfcTag tag) async {
String? identifier;
try {
if (Platform.isAndroid) {
// Try NfcA first (most common)
final nfcA = NfcAAndroid.from(tag);
if (nfcA != null) {
identifier = nfcA.tag.id.map((e) => e.toRadixString(16).padLeft(2, '0')).join('');
} else {
// Fallback to NfcB
final nfcB = NfcBAndroid.from(tag);
if (nfcB != null) {
identifier = nfcB.tag.id.map((e) => e.toRadixString(16).padLeft(2, '0')).join('');
}
}
} else {
// For iOS, try MiFare first
final mifare = MiFareIos.from(tag);
if (mifare != null) {
identifier = mifare.identifier.map((e) => e.toRadixString(16).padLeft(2, '0')).join('');
} else {
// Fallback to Iso15693 for iOS
final iso15693 = Iso15693Ios.from(tag);
if (iso15693 != null) {
identifier = iso15693.identifier.map((e) => e.toRadixString(16).padLeft(2, '0')).join('');
}
}
}
} catch (e) {
print('Error reading NFC tag: $e');
}
nfcId = identifier;
if (!mounted) return;
setState(() {
_reading = true;
mainWidget = doneNfc();
});
Future.delayed(const Duration(seconds: 1), () async {
try {
await NfcManager.instance.stopSession();
} catch (e) {
print('Error stopping session: $e');
}
if (mounted) {
Navigator.pop(context);
widget.onNcfScan(nfcId);
}
});
},
pollingOptions: {NfcPollingOption.iso14443},
).catchError((err) {
print('NFC session error: $err');
// Stop session on error
NfcManager.instance.stopSession().catchError((e) {
print('Error stopping session after error: $e');
});
});
}
@override
Widget build(BuildContext context) {
(mainWidget == null && !_reading) ? mainWidget = scanNfc() : mainWidget = doneNfc();
return AnimatedSwitcher(duration: Duration(milliseconds: 500), child: mainWidget);
}
Widget scanNfc() {
return Container(
key: ValueKey(1),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
SizedBox(
height: 30,
),
Text(
"Ready To Scan",
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 24,
),
),
SizedBox(
height: 30,
),
Image.asset(
"assets/images/nfc_dummy.png",
height: MediaQuery.of(context).size.width / 3,
width: double.infinity,
),
SizedBox(
height: 30,
),
Text(
"Approach an NFC Tag",
style: TextStyle(
fontSize: 18,
),
),
SizedBox(
height: 30,
),
ButtonTheme(
minWidth: MediaQuery.of(context).size.width / 1.2,
height: 45.0,
buttonColor: Colors.grey[300],
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(6),
),
child: TextButton(
onPressed: () async {
try {
await NfcManager.instance.stopSession();
} catch (e) {
print('Error stopping NFC session: $e');
}
if (mounted) {
Navigator.pop(context);
}
},
// elevation: 0,
child: Text("CANCEL"),
),
),
SizedBox(
height: 30,
),
],
),
);
}
Widget doneNfc() {
return Container(
key: ValueKey(2),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
SizedBox(
height: 30,
),
Text(
"Successfully Scanned",
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 24,
),
),
SizedBox(
height: 30,
),
Image.asset(
// "assets/icons/nfc/ic_done.png",
"assets/images/done_dummy.jpeg",
height: MediaQuery.of(context).size.width / 3,
width: double.infinity,
),
SizedBox(
height: 30,
),
Text(
"Approach an NFC Tag",
style: TextStyle(
fontSize: 18,
),
),
SizedBox(
height: 30,
),
ButtonTheme(
minWidth: MediaQuery.of(context).size.width / 1.2,
height: 45.0,
buttonColor: Colors.grey[300],
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(6),
),
child: TextButton(
// onPressed: () {
// _stream?.cancel();
// widget.onNcfScan(nfcId);
// Navigator.pop(context);
// },
onPressed: null,
// elevation: 0,
child: Text("DONE"),
),
),
SizedBox(
height: 30,
),
],
),
);
}
}