Android, How to get context in C2DMReceiver constructor?

I have a C2DM receiver class that initialises the C2DM sender email in the constructor.
The thing is, I need to get the senders email from a resource string and therefore I need to get the context in the constructor for the receiver

The receiver looks like this

public class C2DMReceiver extends C2DMBaseReceiver {
 
     public C2DMReceiver() {
         super(AppConstants.getC2DMSender(this)); // How do I get the context here?
     }
 
     @Override
     public void onRegistered(Context context, String registrationId)
             throws java.io.IOException { ...
 

The relevant code on the C2DMBaseReceiver

public abstract class C2DMBaseReceiver extends IntentService {
 ...
     private final String senderId;
 
     /**
      * The C2DMReceiver class must create a no-arg constructor and pass the 
      * sender id to be used for registration.
      */
     public C2DMBaseReceiver(String senderId) {
         // senderId is used as base name for threads, etc.
         super(senderId);
         this.senderId = senderId;
     }
 ...
 

It's not really relevant to the question but for background purposes the reason for needing this is that the code is in a library project that is used in many android projects each of which has it's own sender's email address defined in a resource file. The AppConstants class has the job of reading the various resource strings and follows on from my accepted answer for a previous question here Android, Best way to provide app sepcific constants in a library project?

Finally for completeness the AppConstants.getC2DMSender method looks like this

public static String getC2DMSender(Context c){
     return c.getResources().getString(uk.co.the_prize_quiz.quiz_template.R.string.c2dm_sender);
 }
 

The specific app that users this library has the responsibility of setting the c2dm_sender variable in an xml resource. So in order to get this variable I need the context

<item type="string" name="c2dm_sender" format="string">app_specific_registered_c2dm@email_address</item>
 

Because this is set in a resource string the specific app can set this value and the template will use it automatically.

---