How to remove an alien element from R.java?

Question

I use IDEA's intellisense automatically (Alt+Enter) as I am so used to know which option it will offer. So this morning I was renaming some XML id (LinearLayout's id) and (probably) somehow generated an entry directly into R.java file. Later I wanted to compile the project, but I keep getting error: <identifier> expected. The R.java looks like this now

public static final class id {
    public static final int @+id/linearLayoutMessages=0x7f080012;
    //... other IDs

Obviously the torn in the file is the prefix @+id/.

I tried removing R.java and rebuilding the project, but it did not help. The same error and the same entry keeps regenerating itself. I can solve this (temporarily) by manually removing this entry from R.java, but I get this message each time I try to rebuild the project.

Any ideas why this strange entry remains persistent even after deleting R.java? The version of IDEA is 11.

Answer 1

You had "@+id/@+id/linearLayoutMessages" in your XML, you silly goose!

Answer 2

in my case it was that I wrote android:id="@+id/52_day_card_image" which is illegal. The solution was android:id="@+id/fiftytwo_day_card_image". Silly me, or silly compiler, your choice