Flutter集成upgrader包报错：Target of URI doesn't exist

报错信息 #

"Target of URI doesn't exist: 'package:upgrader/upgrader.dart'."

已尝试的解决步骤 #

• 重启IDE
• 更换包版本
• 执行Pub get

当前pubspec.yaml配置 #

name: 
description: 
publish_to: 'none'
version: 1.0.0+2

environment:
  sdk: '>=3.1.0 <4.0.0'

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^1.0.2
  http: ^1.1.0
  url_launcher: ^6.1.12
  provider: ^6.0.5
  shared_preferences: ^2.2.0
  intl: ^0.18.1
  nepali_utils: ^3.0.3
  flutter_spinkit: ^5.2.0
  firebase_core: ^2.21.0
  firebase_messaging: ^14.7.3
  animated_text_kit: ^4.2.2
  rive: ^0.12.3
  lottie: ^2.7.0
  badges: ^3.1.2
  dependency_validator: ^3.2.3
  googleapis_auth: ^1.6.0
  flutter_local_notifications: ^17.1.2
  overlay_support: ^2.1.0
  upgrader: 

dev_dependencies:
  flutter_test:
    sdk: flutter

  flutter_lints: ^2.0.0
  flutter_launcher_icons: "^0.13.1"

flutter_launcher_icons:
  android: true
  ios: true
  image_path: "assets/app_icon/icon.jpg"
  min_sdk_android: 21 # android min sdk min:16, default 21


flutter:
  uses-material-design: true
  assets:
    - assets/animations/

  fonts:
    - family: roboto
      fonts:
        - asset: fonts/roboto/Roboto-Regular.ttf
        - asset: fonts/roboto/Roboto-Bold.ttf
        - asset: fonts/roboto/Roboto-Italic.ttf

补充解决建议 #

1. 补全upgrader包版本号 #

你的pubspec.yaml中upgrader:字段后未指定版本号，这会导致pub无法正确拉取依赖包。修改为指定兼容你SDK的版本，例如：

upgrader: ^11.0.0

修改后重新执行flutter pub get。

2. 清理项目缓存 #

执行以下命令彻底清理缓存后重新拉取依赖：

flutter clean
flutter pub get

3. 验证导入语句正确性 #

确保代码中的导入语句无拼写错误：

import 'package:upgrader/upgrader.dart';

4. 清理IDE缓存（以Android Studio/IntelliJ为例） #

通过File -> Invalidate Caches...选择Invalidate and Restart，彻底清理IDE缓存后重启。

内容的提问来源于stack exchange，提问作者Peaky Prodigy