如何在 Flutter 中将图片转为 Base64

Question

我正在尝试将图像转换为 base64，但结果无法作为图像查看。
下面是我的代码。

File image = File(path);
final bytes = image.readAsBytesSync();
print(base64Encode(bytes));

结果：

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

但是上面的结果不能作为图片查看。
我用这些网站检查
codebeautify.org
base64decode

这个问题有什么解决办法吗？

Answer 1

Print 函数不会打印所有内容
如果需要复制这个长字符串，可以在Variables
中设置断点和查看你可以看到下面的图片

Answer 2

您如何尝试查看图像？

base-64 字符串不是有效的图像格式。

您可以使用 Uri.dataFromBytes(bytes, mimeType: "image/jpg") 创建包含图像的 data: URI。该 URI 的有效负载将为您进行 base-64 编码。如果您将该 URI 用作浏览器中 img 元素的 src，它应该显示为图像。

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