自定义包库需要从项目中导入项目的依赖项

Question

我已经创建了一个自定义程序包库。该库具有在pubspec.yaml中定义的http包依赖项。

version: 0.0.1
author:
homepage:

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

dev_dependencies:
  flutter_test:
    sdk: flutter

  http: ^0.12.0+4

我将此自定义库导入了另一个项目。当我运行此项目时，显示与http软件包相关的错误：

Compiler message:
Error: Could not resolve the package 'http' in 'package:http/http.dart'.
Error: Could not resolve the package 'http_parser' in 'package:http_parser/http_parser.dart'.
../xxxxx/lib/src/network/base/http_request.dart:4:8: Error: Not found: 'package:http/http.dart'
import 'package:http/http.dart';

如果此http包仅在自定义库中使用，我不明白为什么需要在项目中导入此包依赖项。

在自定义库结构和主dart文件下面找到。

先谢谢您。