interface Toaster {
   public void toast(String text);
}

class DesktopToaster implements Toaster {
   public void toast(String text) {
    ...
   }
}

class AndroidToaster implements Toaster {
   public void toast(String text) {
      ....
   }
}

class MyApplicationListener implements ApplicationListener {
   Toaster toaster;

   public MyApplicationListener(Toaster toaster) {
      this.toaster = toaster;
   }

   public void render() {
      if(shit)
         toaster.toast("Shit!");
   }
}

class DesktopStarter {
   public static void main(String[] argv) {
      new JoglApplication(new MyApplicationListener(new DesktopToaster()), ...);
   }
}

class AndroidStarter extends AndroidApplication {
   public onCreate(Bundle ...) {
       initialize(new MyApplicationListener(new AndroidToaster(), ...);
   }
}