问题
I'm in a struggle with downloading a picture as a base64-encoded string and then share this image as base64 encoded
i want code that do same in next answer:
How to download picture and convert to base64 correctly in Dart?
i want to do like what this website do he convert URL of an image to base64.
来源：https://stackoverflow.com/questions/58527881/how-to-download-picture-and-convert-to-base64-correctly-in-flutter