Custom Licence

licence.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:package_info_plus/package_info_plus.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({
    super.key,
  });

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String vertion = '';
  List<String> licenseTitle = [];
  List<String> licenseText = [];

  @override
  void initState() {
    super.initState();
    PackageInfo.fromPlatform().then(
      (value) => vertion = value.version,
    );
    LicenseRegistry.licenses.listen((l) {
      final packages = l.packages.toList().map((e) => e).join('');
      final paragraphs = l.paragraphs.toList().map((e) => e.text).join('\n');
      setState(() {
        if (!licenseTitle.contains(packages)) {
          licenseTitle.add(packages);
        }
        if (!licenseText.contains(paragraphs)) {
          licenseText.add(paragraphs);
        }
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(vertion),
      ),
      body: Center(
          child: ListView.builder(
        itemCount: licenseTitle.length,
        itemBuilder: (context, index) {
          return GestureDetector(
            onTap: () {
              Navigator.push(
                  context,
                  MaterialPageRoute(
                      builder: (context) => NextPage(
                          title: licenseTitle[index],
                          text: licenseText[index])));
            },
            child: ListTile(
              title: Container(
                color: Colors.grey,
                padding: const EdgeInsets.all(16),
                child: Text(licenseTitle[index]),
              ),
            ),
          );
        },
      )),
    );
  }
}

class NextPage extends StatelessWidget {
  const NextPage({
    super.key,
    required this.title,
    required this.text,
  });
  final String title;
  final String text;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(title),
      ),
      body: Text(
        text,
      ),
    );
  }
}

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