title: deleted gen folder, eclipse isn't generating it now :(
body: <p>I accidentally deleted my gen folder and now, predictably, my resources are all messed up. I just created a gen folder myself and tried to project > clean - that didn't work. Tried right-clicking project and going to android tools > fix project properties - didn't work. Tried unchecking build automatically...didn't work. cleaned, closed project, closed eclipse, restarted, etc, etc. Nothing is working and I keep seeing this error: <code>gen already exists but is not a source folder. Convert to a source folder or rename it.</code></p>
  
  <p>EDIT -  OK was able to generate R.java, but now I'm getting crazy stuff in the console:</p>
  
  <blockquote>
    <p>[2011-06-14 17:06:11 - fastapp] Conversion to Dalvik format failed
    with error 1
        [2011-06-14 17:06:42 - fastapp] Dx 
        trouble processing "java/awt/font/NumericShaper.class":</p>
  
  <pre><code>Ill-advised or mistaken usage of a core class (java.* or javax.*)
  when not building a core library.
  
  This is often due to inadvertently including a core library file
  in your application's project, when using an IDE (such as
  Eclipse). If you are sure you're not intentionally defining a
  core class, then this is the most likely explanation of what's
  going on.
  
  However, you might actually be trying to define a class in a core
  namespace, the source of which you may have taken, for example,
  from a non-Android virtual machine project. This will most
  assuredly not work. At a minimum, it jeopardizes the
  compatibility of your app with future versions of the platform.
  It is also often of questionable legality.
  
  If you really intend to build a core library -- which is only
  appropriate as part of creating a full virtual machine
  distribution, as opposed to compiling an application -- then use
  the "--core-library" option to suppress this error message.
  
  If you go ahead and use "--core-library" but are in fact
  building an application, then be forewarned that your application
  will still fail to build or run, at some point. Please be
  prepared for angry customers who find, for example, that your
  application ceases to function once they upgrade their operating
  system. You will be to blame for this problem.
  
  If you are legitimately using some code that happens to be in a
  core package, then the easiest safe alternative you have is to
  repackage that code. That is, move the classes in question into
  your own package namespace. This means that they will never be in
  conflict with core system classes. JarJar is a tool that may help
  you in this endeavor. If you find that you cannot do this, then
  that is an indication that the path you are on will ultimately
  lead to pain, suffering, grief, and lamentation.
  
  [2011-06-14 17:06:42 - fastapp] Dx 1 error; aborting
  [2011-06-14 17:06:42 - fastapp] Conversion to Dalvik format failed with error 1
  </code></pre>
    
    <p>And eclipse can't resolve the import of my resources <code>import
    com.me.fastapp.R;</code></p>
  </blockquote>