Android fragment show as dialogfragment or usual fragment

Question

What I am trying to achieve is to have a fragment that on tablet it shows as a DialogFragment, while on smartphone it would be shown as a regular fragment. I am aware there is already a similar post, but I am not able to make that work - apply the style to fragment.

To show things top down, MainActivity.java:

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == R.id.action_next) {
            decideToNext();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private void decideToNext() {
        String device = getString(R.string.device);
        if ("normal".equalsIgnoreCase(device)) {
            Intent intent = new Intent(this, DetailedActivity.class);
            startActivity(intent);
        } else if ("large".equalsIgnoreCase(device)) {
            Log.d("SOME_TAG", "Yes, I am seeing this line on tablet only");
            DetailedFragment fragment = DetailedFragment.newInstance();
            getSupportFragmentManager().beginTransaction().add(fragment, "MAGIC_TAG").commit();
        }
    }

}

DetailedActivity is nothing much:

public class DetailedActivity extends ActionBarActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.detailed_activity);
    }
}

its layout:

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/root_container"
    android:name="com.myapps.sampleandroid.DetailedFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

and the interesting DetailedFragment:

public class DetailedFragment extends Fragment {

    public static DetailedFragment newInstance() {
        return new DetailedFragment();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        Context contextThemeWrapper = new ContextThemeWrapper(getActivity(), R.style.MyDialogTheme);
        LayoutInflater localInflater = inflater.cloneInContext(contextThemeWrapper);
        return localInflater.inflate(R.layout.detailed_fragment, container, false);
    }
}

... and its layout:

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

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Regular Text" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button Dummy" />

</LinearLayout>

In onCreateView I've tried to set the custom styling but it doesn't seem to work for tablet.

Styling

res/values/styles.xml contains:

<resources>

    <style name="AppTheme" parent="@style/Theme.AppCompat.Light.DarkActionBar">
    </style>

    <style name="MyDialogTheme" />

</resources>

while res/values-large/styles.xml:

<resources>
    <!-- Is there anything I should add here? -->
    <style name="MyDialogTheme" parent="@android:style/Theme.Dialog"/>
</resources>

I've nested MyDialogTheme from Theme.Dialog, but it doesn't seem to help.

On smartphone when tapping on "NEXT" action bar menu item I am seeing the detailed activity (snapshot from an SG2):

while tapping on the same "NEXT" menu item from the tablet it doesn't do anything (except viewing the message on Logcat: Yes, I am seeing this line).

What should I add more in styles.xml or in code in order to see DetailedFragment as a dialog for tablet?

EDIT

I've tried the solution Little Child proposed (to have a DialogFragment contain my initial fragment and show it). So, I've added a WrapperDetailedFragment:

public class WraperDetailedFragment extends DialogFragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.wrap_detailed_fragment, container, false);
    }
}

its layout:

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

    <fragment
        android:id="@+id/wrapped_fragment_id"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.myapps.sampleandroid.DetailedFragment" />

</LinearLayout>

The code from MainActivity changes to:

private void decideToNext() {
    String device = getString(R.string.device);
    if ("normal".equalsIgnoreCase(device)) {
        Intent intent = new Intent(this, DetailedActivity.class);
        startActivity(intent);
    } else if ("large".equalsIgnoreCase(device)) {
        Log.d("SOME_TAG", "Yes, I am seeing this line ...");
        WraperDetailedFragment fragment = new WraperDetailedFragment();
        fragment.show(getSupportFragmentManager(), "MAGICAL_TAG");
    }
}

but when I'm trying to add this DialogFragment I am getting the following crash:

android.view.InflateException: Binary XML file line #8: Error inflating class fragment
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
    at com.myapps.sampleandroid.WraperDetailedFragment.onCreateView(WraperDetailedFragment.java:12)
    at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1082)
    at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:304)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
    at com.myapps.sampleandroid.WraperDetailedFragment.onCreateView(WraperDetailedFragment.java:12)
    at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460)
    at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:440)
    at android.os.Handler.handleCallback(Handler.java:615)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4745)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: Binary XML file line #8: Duplicate id 0x7f050047, tag null, or parent id 0x0 with another fragment for com.myapps.sampleandroid.DetailedFragment
    at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:290)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
    ... 28 more