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本篇文章主要讲解，Flutter安装完新依赖打包apk报错 A problem occurred configuring project ‘:image_cropper’. 命名空间问题的解决办法及原因说明。
日期：2025年2月15日
作者：任聪聪

一、报错现象：

报文信息：

FAILURE: Build failed with an exception.* What went wrong:
A problem occurred configuring project ':image_cropper'.
> Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.> Namespace not specified. Specify a namespace in the module's build file. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.If you've specified the package attribute in the source AndroidManifest.xml, you can use the AGP Upgrade Assistant to migrate to the namespace value in the build file. Refer to https://d.android.com/r/tools/upgrade-assistant/agp-upgrade-assistant for general information about using the AGP Upgrade Assistant.* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.BUILD FAILED in 3s
Error: Gradle task assembleDebug failed with exit code 1

二、原因说明

1.版本不兼容现有的flutter 或 android版本

解决办法：

 flutter cleanflutter upgrade

2.如果自动更新无法找到合适库的情况

解决办法：登录 http://pub.dev 查询最新的插件版本，如下图：

进行配置：

重新执行清理缓存，并获取安装：

flutter clean
flutter  pub get

完成：