custom_lottie_asset.dart

  import 'dart:async';

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

  class NotiferChanges<T> {
    final StreamController<T> _fetchDoneController = StreamController.broadcast();

    changeNavigate(T data) {
      _fetchDoneController.add(data); // send an arbitrary event
    }

    Stream<T> get fetchDone => _fetchDoneController.stream;
  }

  class LottieAssetCustom extends StatefulWidget {
    final String lottiePath;
    final double next;
    final double back;
    final NotiferChanges<bool> changes;
    const LottieAssetCustom(
        {Key? key, required this.lottiePath, required this.next, required this.back, required this.changes})
        : super(key: key);

    @override
    State<LottieAssetCustom> createState() => _LottieCustomState();
  }

  class _LottieCustomState extends State<LottieAssetCustom> with SingleTickerProviderStateMixin {
    late final AnimationController _controller;

    @override
    void initState() {
      super.initState();
      _controller = AnimationController(vsync: this);
      widget.changes.fetchDone.listen((event) {
        event ? _nextAnimation() : _backAnimation();
      });
    }

    void _nextAnimation() {
      _controller.animateTo(widget.next);
    }

    void _backAnimation() {
      _controller.animateBack(widget.back);
    }

    @override
    Widget build(BuildContext context) {
      return Lottie.asset(widget.lottiePath, controller: _controller, onLoaded: (item) {
        _controller.duration = item.duration;
      });
    }
  }

sample_lottie.dart

 ListTile(
          title: Text(LocaleKeys.settings_changeTheme.tr()),
          onTap: () async {
            if (context.read<ThemeManager>().themeEnums == ThemeType.light) {
              _notiferChanges.changeNavigate(false);
            } else {
              _notiferChanges.changeNavigate(true);
            }
          },
          trailing: LottieAssetCustom(
            lottiePath: ImageConstants.instance.lottieAssets.darkMode,
            next: 0.4,
            back: 0,
            changes: _notiferChanges,
          )),