My current implementation:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new PagerAdapter(getSupportFragmentManager());
//...
if(mPagerAdapter.getCount() == 0)
{
setContentView(R.layout.fragment_screen_empty);
}