AS出现Unsupported modules detected

AS出现Unsupported modules detected
项目中碰到Unsupported modules detected应该怎么办?
提示
Compilation is not supported for following modules: prdownloader. Unfortunately you can’t have non-Gradle Java modules and Android-Gradle modules in one project.

直接删除项目目录下 idea、或者关闭项目，去项目目录删除，再打开即可