pubspec.yaml 的第 17 行第 5 列错误：依赖项可能只有一个源

Question

Added http package in the pubspec file and getting the error as :A dependency may only have one source, shown in the image below too.

Please help me how to resolve that issue.

Thanks.

Answer 1

Indentation is significant in YAML

It should be instead

dpendencies:
  flutter:
    sdk: flutter
  http: ^0.12.0+^ # indentation like `flutter:` above, not like `sdk: ...`

Answer 2

在cupertino_icons: ^0.1.2下面写http: ^0.12.0+1 cupertino_icons: ^0.1.2依赖并运行命令flutter packages get命令。

Answer 3

You should put your http dependency outside.

dependencies:
  flutter:
    sdk: flutter
  http: ^0.12.0+1

or

dependencies:
  http: ^0.12.0+1
  flutter:
    sdk: flutter

Answer 4

http包的缩进要配合flutter：

Answer 5

Run

flutter packages get -v

please. this worked for me...

Ref: https://github.com/flutter/flutter/issues/26617#issuecomment-454676770