How to create an Android Tabbed Dialog containing fragments?

Question

Can anyone point me to an example or show me how to create a simple Tabbed Dialog in Android where the contents of each tab are Fragments? All the examples/tutorials I have found are about Fragments and Tabs, but nothing specific to DialogFragments.

The documentation for FragmentTabHost shows how to create tabs within normal fragments using getChildFragmentManager(). I'm assuming this should also work when the fragment is a DialogFragment but when I try it I get:

java.lang.IllegalStateException: Fragment does not have a view at android.support.v4.app.Fragment$1.findViewById(Fragment.java:1425)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:901)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
...

Here's my code for setting up the view (which is then passed to AlertDialog.setView()):

private void setupView(View v) {
    mTabHost = (FragmentTabHost) v.findViewById(android.R.id.tabhost);

   mTabHost.setup(getActivity(), getChildFragmentManager(), R.id.realtabcontent);

   mTabHost.addTab(mTabHost.newTabSpec("tab1").setIndicator("Tab1"),
            MyDialogFragment.class, null);
}

Answer 1

Spent a lot of time to get it working, but no luck. The only solution I found is create dummy fragment tabhost and use viewpager with fragments instead of tabhost fragments

voters_dialog.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:orientation="vertical"
        >

        <android.support.v4.app.FragmentTabHost
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/tabs"
                >
        </android.support.v4.app.FragmentTabHost>

        <android.support.v4.view.ViewPager
                android:id="@+id/pager"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:gravity="center"/>

</LinearLayout>

Dialog class, the trick is use onCreateView not onCreateDialog

public class VotersDialog extends DialogFragment {


    private FragmentTabHost mTabHost;
    private ViewPager viewPager;
    private VotersPagerAdapter adapter;


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

        getDialog().setTitle(getArguments().getString("title"));

        mTabHost = (FragmentTabHost) view.findViewById(R.id.tabs);

        mTabHost.setup(getActivity(), getChildFragmentManager());
        mTabHost.addTab(mTabHost.newTabSpec("tab1").setIndicator("Плюсов"), Fragment.class, null);
        mTabHost.addTab(mTabHost.newTabSpec("tab2").setIndicator("Минусов"), Fragment.class, null);


        adapter = new VotersPagerAdapter(getChildFragmentManager(), getArguments());
        adapter.setTitles(new String[]{"Плюсов", "Минусов"});

        viewPager = (ViewPager)view.findViewById(R.id.pager);
        viewPager.setAdapter(adapter);

        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int i, float v, int i2) {
            }

            @Override
            public void onPageSelected(int i) {
                mTabHost.setCurrentTab(i);
            }

            @Override
            public void onPageScrollStateChanged(int i) {

            }
        });

        mTabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
            @Override
            public void onTabChanged(String s) {
                int i = mTabHost.getCurrentTab();
                viewPager.setCurrentItem(i);
            }
        });

        return view;
    }


    public class VotersPagerAdapter extends FragmentPagerAdapter {

        Bundle bundle;
        String [] titles;

        public VotersPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        public VotersPagerAdapter(FragmentManager fm, Bundle bundle) {
            super(fm);
            this.bundle = bundle;
        }

        @Override
        public Fragment getItem(int num) {
            Fragment fragment = new VotersListFragment();
            Bundle args = new Bundle();
            args.putSerializable("voters",bundle.getSerializable( num == 0 ? "pros" : "cons"));
            fragment.setArguments(args);
            return fragment;
        }

        @Override
        public int getCount() {
            return 2;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return titles[position];
        }

        public void setTitles(String[] titles) {
            this.titles = titles;
        }
    }

    public static class VotersListFragment extends ListFragment {

        List<String> voters;

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

        @Override
        public void onActivityCreated(Bundle savedInstanceState) {

            super.onActivityCreated(savedInstanceState);
            voters = (ArrayList) getArguments().getSerializable("voters");

            ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, voters);
            setListAdapter(adapter);

            getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                    Intent intent = new Intent(getActivity(), ProfileActivity_.class);
                    String login = voters.get(i);
                    intent.putExtra("login", Utils.encodeString(login.substring(0, login.indexOf("(")).trim()));
                    startActivity(intent);
                }
            });

        }

    }

}

Here is result, now you can press tabs or swipe fragments