Difference between “@id/” and “@+id/” in Android

Question

What is the diffirence between the @id/ and @+id/?

In @+id/ the plus symbol

Answer 1

There's a bug with Eclipse where sometimes if you just created a new @+id/.., it won't be added immediately to the R.java file, even after clean-building the project. The solution is to restart Eclipse.

This I think should be solved as soon as possible, because it may (and from experience, will) confuse some developers into thinking that there's something wrong with their syntax, and try to debug it even if there's really nothing to debug.