将 base64 转换为 Flutter 中的图像错误

Question

I have this image as a base64 String which I then want to convert to image in BoxDecoration like so:

 Container(
                decoration: BoxDecoration(image: DecorationImage(image: Utility.imageFromBase64String(drink.image))),

Here is the function that decodes the String to Image.

Function

    class Utility {
  static Image imageFromBase64String(String base64String) {
    return Image.memory(
      base64Decode(base64String),
      fit: BoxFit.fill,
    );
  }}

However, I am getting an error in BoxDecoration:

The argument type 'Image' can't be assigned to the parameter type 'ImageProvider<Object>'

The error is in this part, I suppose I can't put in Image since it asks for ImageProvider:

image: DecorationImage(image: Utility.imageFromBase64String(drink.image))

Any ideas how to make it work? Thanks!

Answer 1

The image property from DecorationImage is of type ImageProvider<object> not Image .

Return a MemoryImage from imageFromBase64String like so

  static MemoryImage imageFromBase64String(String base64String) {
    return MemoryImage(
      base64Decode(base64String)
    );
  }

Then this.

image: DecorationImage(
  image: Utility.imageFromBase64String(drink.image),
  fit: BoxFit.fill,
)