loc-chain-app/loc_chain_app/lib/pages/bluetooth.dart

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import 'dart:io';
import 'dart:math';
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:nearby_connections/nearby_connections.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class BluetoothPage extends StatefulWidget {
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BluetoothPage({Key? key, required this.title}) : super(key: key);
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final String title;
@override
_BluetoothPageState createState() => _BluetoothPageState();
}
class _BluetoothPageState extends State<BluetoothPage> {
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// final String id = getId();
// String getId() =>
// SharedPreferences.getInstance().then((s) => s.getString('id') ?? '0');
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@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
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body: Center(
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child: ElevatedButton(
child: Text("GetID"),
onPressed: () async {
final prefs = await SharedPreferences.getInstance();
final id = prefs.getString('id');
ScaffoldMessenger.of(context)
.showSnackBar(SnackBar(content: Text("Id is $id")));
},
),
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),
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);
}
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void showSnackbar(dynamic a) {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text(a.toString()),
));
}
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}