tlv_decoder 0.0.5

tlv_decoder: ^0.0.5 copied to clipboard

example/lib/main.dart

import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:tlv_decoder/tlv_decoder.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: HomeScreen(title: 'TLV encoding and decoding'),
    );
  }
}

class HomeScreen extends StatefulWidget {
  final String title;

  const HomeScreen({super.key, this.title = ''});

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  String _output = '';

  void _encode() {
    final tlvList = [
      TLV(type: 1, length: 3, value: Uint8List.fromList([0x41, 0x42, 0x43])),
      TLV(type: 2, length: 2, value: Uint8List.fromList([0x44, 0x45])),
    ];
    final encoded = TlvUtils.encode(tlvList);
    setState(() => _output = 'Encoded: $encoded');
  }

  void _decode() {
    final data = Uint8List.fromList(
      [0x01, 0x03, 0x41, 0x42, 0x43, 0x02, 0x02, 0x44, 0x45],
    );
    final tlvList = TlvUtils.decode(data);
    setState(() => _output = 'Decoded: ${tlvList.join('\n')}');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(widget.title)),
      body: Center(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            TextButton(onPressed: _encode, child: const Text('Encode')),
            const SizedBox(height: 10),
            TextButton(onPressed: _decode, child: const Text('Decode')),
            const SizedBox(height: 20),
            Padding(
              padding: const EdgeInsets.all(16),
              child: Text(_output),
            ),
          ],
        ),
      ),
    );
  }
}