R.java disappears after project clean

Question

After I added some .png files into my Project Workspace drawable folder I refreshed my drawable folders in Eclipse and the newly added files showed up. But when I tried to a

Answer 1

I had this problem on my Mac too and I think it could be good to know for all Mac users how I managed to solve this error.

I had a .DSStore file automatically imported to my project inside the res directory and when I removed it and rebuilt the project all went well.

Answer 2

Delete your project from workspace witout source deleting and then import it into workspace.

RightClick on your Project -> Delete /Don't select "Delete project content on disk (cannot be undone)"/ -> Ok

File -> Import -> General -> Existing Projects into Workspace -> Brouse -> /Look for your workspace(!) folder/ -> Ok -> /your cleaned project will be automatically checked/ -> Finish

Answer 3

All my R.* files stopped working after I did a Project->clean in Eclipse. The issue was that I backed up a XML file attached to one of my activities in the layout directory. This causes errors in every activity of my project.

After deleting the file I still had R errors in one of my Activities and it only was resolved after I tried importing different files and then deleting them. I actually made no change to the previous imports but for some reason deleting them all and re-pasting them fixed it.

Answer 4

I read and tried many of the above after simply doing a clean on one project. Eclipse would not build anything afterwards.

Fortunately I had last-nights backup of the workspace and my source is copied in from VS 2010.

No more cleaning!

Answer 5

just check your image folder (usually created res > drawable files) and be sure dont use capital letters on .png files, every type must be in small letters then you can find again your R.java under the gen file folder

Answer 6

I have same problem occur just now I renamed invalid png file like *demo.1.png as demo.png * and its work.