Android FragmentTabHost : No tab known for tag null

Question

I used below code and it is not render graphical layout. display error as Exception raised during rendering: No tab known for tag null.

how can i solve

Answer 1

My develop environment is Android Studio 0.8.9 with API19 SDK.

If I put the FragmentTabHost in a FragmentActivity, it works. When I put the FragmentTabHost in a Fragment, it gets "no tab known for tag null" when render and get runtime error when LayoutInflater inflate the layout.

Thank for user3216049's answer, it's a good workaround. Sorry, I cannot vote since I am a newbie. :(

However it display nothing in my test tab fragments. I did a small modification.

• test_fragment.xml

• fragment_section_dummy.xml

• Java code The point is that I change the id to the "R.id.realtabcontent" in FragmentTabHost.setup()

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTabHost;

public class TestFragment extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, 
                ViewGroup container, Bundle savedInstanceState) {

        FragmentTabHost tabHost = new FragmentTabHost(getActivity());
        inflater.inflate(R.layout.test_fragment, tabHost);
        tabHost.setup(getActivity(), 
                      getChildFragmentManager(), R.id.realtabcontent);

        tabHost.addTab(tabHost.newTabSpec("simple")
            .setIndicator("Simple"), DummySectionFragment.class, null);
        tabHost.addTab(tabHost.newTabSpec("contacts")
            .setIndicator("Contacts"), DummySectionFragment.class, null);
        return tabHost;
    }

    /**
     * A dummy fragment representing a section of the app, 
     * but that simply displays dummy text.
     */
    public static class DummySectionFragment extends Fragment {
        private static int count = 0;
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_section_dummy, 
                   container, false);
            ((TextView) rootView.findViewById(android.R.id.text1))
                    .setText("Dummy Section " + count++);
            return rootView;
        }
    }
}