Android FragmentViewPager in Fragment

Question

I'm trying to implement a ViewPager into my fragment. Here is my Code:

Parent fragment:

    @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_parent, container, false);

    ViewPager viewPager = (ViewPager) view.findViewById(R.id.viewPager);
    adapter = new CustomPagerAdapter(getChildFragmentManager());
    viewPager.setAdapter(adapter);
    viewPager.setCurrentItem(0);

    return view;
}

Childfragment:

    @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_child, container, false);

    return v;
}

Adapter:

public class CustomPagerAdapter extends FragmentPagerAdapter {
public CustomPagerAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {
    return new ChildFragment();
}

@Override
public int getCount() {
    return 3;
}
}

So after a while of searching I found out, that I need to use

getChildFragmentManager()

instead of

getFragmentManager()

But nothing happens! With the child fragment is all right, this can be shown as a single fragment, but not in my view pager. Width and height is everywhere "match_parent". The viewPager is in a LinearLayout which is in a scrollView. Could be the scrollview the reason? I don't have any ideas anymore. Can someone help? Thanks a lot! :)

EDIT: I used this tut: How to implement a ViewPager with different Fragments / Layouts

Answer 1

add:

android:fillViewport="true"

to your scrollview