Hello world android - creation with errors -

I'm trying to make my first app with Android but I'm having some problems.

After creating and creating the tutorial: The new Android application -> empty activity

should have its default result:

Main activity inside. Jawa and RJava inside.

But instead I got this:

There are many errors and R. Java file is unavailable.

I can get a result similar to the tutorial (with no errors), creating a new Android application and unchecking the activity, but the main activity at this time. Perhaps I can do the main activity of the first project. I can copy the java and apply it to another, but I like to understand why it does not work.

Thanks for the help. Good relation with everybody.