ListFragment und FragmentPagerAdapter wollen nicht so richtig

@Override
    	public Fragment getItem(int i) {
        	switch (i) {
            	case 0:
                	// The first section of the app is the most interesting -- it offers
                	// a launchpad into the other demonstrations in this example application.
                	series_list newFragment = new series_list();


                	return newFragment;


            	case 1:
                	return new AddSeries();


            	default:
                	// The other sections of the app are dummy placeholders.
                	Fragment fragment = new DummySectionFragment();
                	Bundle args = new Bundle();
                	args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, i + 1);
                	fragment.setArguments(args);
                	return fragment;
        	}
    	}