title: Buttons no longer showing after fixing R cannot be resolved to a variable error
body: <p>I ran into the dreaded "R cannot be resolved to a variable" error after doing a Project > Clean. I tracked the problem down to my main.XML file (wasnt the typical import.R in the java)  . It was giving an error along the lines of "error parsing XML" at the end of my LinearLayout. To fix it I had to clear out all the code in my main.XML, save the changes, then retype it. That fixed the R cannot be resolved. However, my buttons are no longer visible in either the graphical layout image or while running on a device. I have an edittext at the top which is still visible, but the buttons below it no longer show up. Project > Clean doesn't fix it, exiting and restarting Eclipse hasnt fixed it, typing in a harmless string or adding another button and saving hasnt fixed it. My gen file is there, and its showing the layout. Thoughts on where else to look?</p>