R cannot be resolved - Android, no import android.R; statement

Question

Ok, I am working on a new app and everything worked fine as long as I used a Relative View. However, I want a tabbed layout so I switched what I had (not much so far since I just got it reading from a DB and settings working) over to a tabbed view. Since that time, any class that has any R. statement in it has an "R cannot be resolved" error. I am following the tutorial from the Android "Hello Views" tutorial so I am assuming that isn't the issue (but it could still be).

Answer 1

I have a few suggestions:

1. Make sure you don't have any other errors other than the R-related errors. Right-click your project folder in Eclipse, Android Tools -> Fix Project Properties.

2. Check to make sure you have the correct R imported. Sometimes the default Android.R can be imported.

3. Check for errors in your layout XML files.

Answer 2

1. You can try to "clean" your project.
2. The default tech solution helps sometimes: restart Eclipse (seriously)
3. If you have an error (something in your XML maybe, or something else), R cannot be compiled. If this is the case, try to find the first error noted. If you fix this, R will be compiled and found. If necesairy, use point 1. and 2. after fixing stuff.
4. Remove all "import R" stuff in the import sections. You don't want that.