Compilation is not supported for following modules: eve_2. Unfortunately you can't have non-Gradle Java modules and Android-Gradle modules in one project. code example

Example: Compilation is not supported for following modules: android. Unfortunately you can't have non-Gradle Java modules and Android-Gradle modules in one project

save .idea folder somewhere else (for backup)
remove .idea folder
start AndroidStudio
select project
[there may be an error, ignore that]
click File -> Invalidate Caches/ Restart
click button: Invalidate Caches/ Restart
resolved

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Java Example