如何在颤动中从NetworkImage中获取大小

import 'package:flutter/material.dart';

Future<Size> getImageSize(String imageUrl) async {
  Completer<Size> completer = Completer();
  Image image = Image.network(
    imageUrl,
    fit: BoxFit.fill,
  );

  image.image.resolve(ImageConfiguration()).addListener(
    ImageStreamListener(
      (ImageInfo info, bool _) {
        completer.complete(
          Size(
            info.image.width.toDouble(),
            info.image.height.toDouble(),
          ),
        );
      },
    ),
  );

  return completer.future;
}

void main() async {
  Size imageSize = await getImageSize('https://example.com/image.jpg');
  print('Image size: ${imageSize.width} x ${imageSize.height}');
}