pkgs/jnigen/example/kotlin_plugin/example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:kotlin_plugin/kotlin_plugin.dart';
import 'package:jni/jni.dart';

void main() {
  Jni.initDLApi();
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Kotlin Plugin Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Kotlin Plugin Example Home Page'),
    );
  }
}

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  Future<String>? answer;

  late Example example;

  @override
  void initState() {
    super.initState();
    example = Example();
  }

  @override
  void dispose() {
    example.release();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'What is the answer to life, the universe, and everything?',
            ),
            ElevatedButton(
              onPressed: () {
                setState(() {
                  answer = example.thinkBeforeAnswering().then(
                      (value) => value.toDartString(releaseOriginal: true));
                });
              },
              child: const Text('Think...'),
            ),
            FutureBuilder<String>(
              future: answer,
              builder: (context, snapshot) {
                switch (snapshot.connectionState) {
                  case ConnectionState.none:
                    return const SizedBox();
                  case ConnectionState.waiting:
                  case ConnectionState.active:
                    return Text(
                      'Thinking...',
                      style: Theme.of(context).textTheme.headlineMedium,
                    );
                  case ConnectionState.done:
                    return Text(
                      snapshot.data ?? "I don't know!",
                      style: Theme.of(context).textTheme.headlineMedium,
                    );
                }
              },
            ),
          ],
        ),
      ),
    );
  }
}