The eclipse is returning this error "R can not be resolved to the variable"

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I was programming normally until I clean up my project to remove the warnings, the eclipse has successfully cleaned up but displays me this error

R can not be resolved to the variable

In all java codes I have in my project.

What I do?

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  • 1

    Confused Stackoverflow website with Stackoverflow in English friend? Just translate.

  • Usually this is solved with Project->Clean. Check before if you have any unsaved xml files.

  • I have everything recorded, there is no mistake, I just gave a clean and all these boars got this mistake, I don’t know why

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