Flutter Image 对象到 ImageProvider

我必须从 base64 读取图像源才能进行 flutterImage https://api.flutter.dev/flutter/widgets/Image-class.html object.

Image img = Image.memory(base64Decode(BASE64_STRING));

然后我想将图像作为容器背景。但 DecorationImage 只接受图像提供者 https://api.flutter.dev/flutter/painting/ImageProvider-class.html.

如何将图像转换为ImageProvider？或者还有其他方法将 base64 图像传递给 ImageProvider 吗？

Container(
  decoration: BoxDecoration(
    color: Colors.green,
    image: DecorationImage(
      image: img // <-- Expecting ImageProvider
    )
)

Call .image在你的Image得到ImageProvider.

例如假设：

Image img = Image.asset('assets/logo.png');

在你的情况下：

Container(
  decoration: BoxDecoration(
    color: Colors.green,
    image: DecorationImage(
      image: img.image // <--- .image added here
    )
)