For those who have this problem with Android Studio. Try the following:
1) Go to your project settings
2) Go to Modules → and select “Sources” on the module options tab, - There should be an option “Add content root directory”, and below - blue, green and red tab folders for source folders, test source folders and excluded folders, respectively.
3) On the right side, right-click on the java source folder that you want to add and select to add it to the source or tests (depending on which files you add).
4) The added files should now be displayed with a blue circle with c in the center on the left pane of the project window.
ZenBalance Jul 15 '13 at 20:51 2013-07-15 20:51
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