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 have got the same problem after lots of cleaning and building project again and again. I found that on console there is this error:

res/drawable-hdpi/Blue Blank.png: Invalid file name: must contain only [a-z0-9_.]

and this is not appearing as an error in xml. I changed the name and save the file, clean project and build. Now it's working. My suggestion check your res folder and name of files you use in it and name only [a-z0-9_.].

Delete related tag in xml, save xml, clean project, build project. Now again put that resource in xml and save!