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I downloaded a project from GitHub, in which me and a friend are working on. Everything was working fine and all of a sudden a red circle with a "J" in it was on the Java files' icons and the run app button become grayed out. Please help me!

teobais
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proselyte6
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    right click on directory containing the java package and 'Mark Directoy As'->sources root. the folder should turn blue i think. and the package folders will have a little blue dot – Aarjav Aug 08 '15 at 20:43

1 Answers1

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I hope you have already found a workaround, but if not/for future reference:
I assume we 're talking about this icon: enter image description here.
If this answer (or this post) don't seem to be a solution for you, then you should probably go for Configuring Content Roots (docs based on IntelliJ, but this answer should conform the docs to Android-Studio).

Community
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teobais
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