How to launch titanium app Activity from module

I'm toying with a module that incorporates the Parse.com Android SDK with Titanium, and I'm running into something I can't figure out. In Parse, when you subscribe to a push notification channel, the signature for that method looks like:

PushService.subscribe(context, "the_channel_name", YourActivity.class);

Where YourActivity.class is the class of the activity that will launch when the user taps on the push notification. But since I'm using Titanium, I'm not sure how to reference a meaningful class here that will launch my Titanium app. Right now, I've just given it a dummy class:

class ReceivePush extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    }
}

That works to get me subscribed to the push notifications in Parse, but obviously that activity doesn't do anything, so when I tap the notification, it's just dismissed and nothing happens.

Any ideas/suggestions for how this might work so that when I tap the notification, I can open my Titanium app? Ideally, when I tap on the notification, I could run launch the app and run some sort of callback in my Titanium javascript code.