如何在flutter中获得像facebook那样的闪光效果？

import 'package:flutter/material.dart';

class FlashEffect extends StatefulWidget {
  final Widget child;

  FlashEffect({required this.child});

  @override
  _FlashEffectState createState() => _FlashEffectState();
}

class _FlashEffectState extends State<FlashEffect>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _opacityAnimation;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      vsync: this,
      duration: Duration(milliseconds: 500),
    )..repeat(reverse: true);
    _opacityAnimation = Tween(begin: 0.0, end: 0.5).animate(_controller);
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return AnimatedBuilder(
      animation: _controller,
      builder: (context, child) {
        return Opacity(
          opacity: _opacityAnimation.value,
          child: child,
        );
      },
      child: widget.child,
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flash Effect Demo',
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flash Effect Demo'),
        ),
        body: Center(
          child: FlashEffect(
            child: Image.asset('assets/facebook_logo.png'), // 替换为你的图片资源
          ),
        ),
      ),
    );
  }
}