lemmur-app-android/lib/widgets/about_tile.dart

import 'package:flutter/material.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:flutter_markdown/flutter_markdown.dart';
import 'package:package_info/package_info.dart';

import '../hooks/memo_future.dart';
import '../url_launcher.dart';
import 'bottom_modal.dart';

/// Title that opens a dialog with information about Lemmur.
/// Licenses, changelog, version etc.
class AboutTile extends HookWidget {
  @override
  Widget build(BuildContext context) {
    final packageInfoSnap = useMemoFuture(PackageInfo.fromPlatform);
    final assetBundle = DefaultAssetBundle.of(context);
    final changelogSnap =
        useMemoFuture(() => assetBundle.loadString('CHANGELOG.md'));

    if (!packageInfoSnap.hasData || !changelogSnap.hasData) {
      return const SizedBox.shrink();
    }

    final packageInfo = packageInfoSnap.data;
    final changelog = changelogSnap.data;

    // TODO: add app icon
    return AboutListTile(
      icon: Icon(Icons.info),
      aboutBoxChildren: [
        FlatButton.icon(
          icon: Icon(Icons.subject),
          label: Text('changelog'),
          onPressed: () => showModalBottomSheet(
            context: context,
            builder: (_) => BottomModal(
              child: MarkdownBody(data: changelog),
            ),
          ),
        ),
        FlatButton.icon(
          icon: Icon(Icons.code),
          label: Text('source code'),
          onPressed: () => openInBrowser('https://github.com/krawieck/lemmur'),
        ),
        FlatButton.icon(
          icon: Icon(Icons.monetization_on),
          label: Text('support development'),
          onPressed: () {}, // TODO: link to some donation site
        ),
      ],
      applicationVersion: packageInfo.version,
    );
  }
}