import 'package:collection/collection.dart';
import 'package:flutter/material.dart';
import 'package:lottie/lottie.dart';

void main() => runApp(const App());

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: Scaffold(
        body: Example(),
      ),
    );
  }
}

//---- example
class Example extends StatelessWidget {
  const Example({super.key});

  @override
  Widget build(BuildContext context) {
    return Lottie.asset(
      'assets/cat.lottie',
      decoder: customDecoder,
    );
  }
}

Future<LottieComposition?> customDecoder(List<int> bytes) {
  return LottieComposition.decodeZip(bytes, filePicker: (files) {
    return files.firstWhereOrNull(
        (f) => f.name.startsWith('animations/') && f.name.endsWith('.json'));
  });
}
//----