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Android Studio:从 G​​ithub 导入项目并使用 gradle 文件重建/清理/同步后“无法解析符号 R”

[英]Android Studio: "cannot resolve symbol R" after importing Project from Github and rebuilding/cleaning/syncing with gradle files

I imported a project from github (" https://github.com/londonappbrewery/I-Am-Poor-Android ") and my Main class cannot resolve the symbol R. I googled and tried the following solutions:我从 github (" https://github.com/londonappbrewery/I-Am-Poor-Android ") 导入了一个项目,我的主类无法解析符号 R。我用谷歌搜索并尝试了以下解决方案:

  • Clean Project清洁工程
  • Rebuild Project重建项目
  • Invalidate Caches and Restart使缓存无效并重新启动
  • Sync Project with gradle files将项目与 gradle 文件同步

I am new to Android Studio and currently following a tutorial on Udemy.我是 Android Studio 的新手,目前正在学习有关 Udemy 的教程。 If somebody could help me understand why it is not working and helping to find a solution, I would be very thankful!如果有人可以帮助我理解为什么它不起作用并帮助找到解决方案,我将不胜感激!

Brotherrrrrr, your project uses the 3.3.1 release of the Android Gradle plugin. Brotherrrrrr,您的项目使用Android Gradle 插件的3.3.1 版本。 Make sure you are using Android Studio 3.3.1 aswell.确保您也使用 Android Studio 3.3.1。

Greetings,你好,

Your brotherrrrr你的兄弟rrrr

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