flutter从图片链接获取图片高度

原创于 2025-09-30 11:19:32 发布 · 136 阅读

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#flutter #前端 #android

 /*获取网络图片高度
  * */
  Future<Size> getImageDimensions(String imageUrl) async {
    final ImageProvider provider = NetworkImage(imageUrl);
    final Completer<Size> completer = Completer<Size>();

    final ImageStreamListener listener = ImageStreamListener(
          (ImageInfo info, bool synchronousCall) {
        final Size imageSize = Size(info.image.width.toDouble(), info.image.height.toDouble());
        completer.complete(imageSize);
      },
      onError: (exception, stackTrace) {
        completer.completeError(exception, stackTrace);
      },
    );

    final ImageStream stream = provider.resolve(const ImageConfiguration());
    stream.addListener(listener);

    return completer.future;
  }