如何在Flutter中通过url从网络图像中获取Uint8List? [英] How to get a Uint8List from a Network image by url in Flutter?

问题描述

我有图像的网络URL，我需要获取Uint8List.如何转换?我检查类似问题的答案，但是这些方法不起作用.如何从网络映像中获取Flutter Uint8List?/a>

I have the network url of image and I need to get Uint8List. How can I convert it? I check answers in like question, but those ways don't work. How to get a Flutter Uint8List from a Network Image?

推荐答案

Uint8List yourVar;
final DecoderCallback callback = (Uint8List bytes, {int cacheWidth, int cacheHeight}) {
        yourVar = bytes.buffer.asUint8List();
        return instantiateImageCodec(bytes, targetWidth: cacheWidth, targetHeight: cacheHeight);
      };
ImageProvider provider = NetworkImage(yourImageUrl);
    provider.obtainKey(createLocalImageConfiguration(context)).then((key) {
      provider.load(key, callback);
    });

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