Как загрузить YouTubePlayer с помощью YouTubePlayerFragment внутри другого фрагмента? (Android)

Я хочу загрузить YoutubePlayer в фрагмент, используя YouTubePlayerFragment из API

Файл .xml моего фрагмента:

<?xml version="1.0" encoding="utf-8"?>

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


    <!-- VIDEO CONTENT -->



    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:paddingLeft="@dimen/layout_horizontal_margin"
        android:paddingRight="@dimen/layout_horizontal_margin"
        android:paddingTop="@dimen/layout_vertical_margin"
        android:paddingBottom="@dimen/layout_vertical_margin" >


        <fragment
            android:name="com.google.android.youtube.player.YouTubePlayerFragment"
            android:id="@+id/youtubeplayer_fragment"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

        </LinearLayout>


    <!-- LYRIC CONTENT -->

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="2" >

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:background="@drawable/af_background"
            android:layout_centerInParent="true" />



        <!-- TEXT STRUCTURE -->

        <LinearLayout
            android:orientation="vertical"
            android:id="@+id/lyric_content"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerHorizontal="true" >



            <LinearLayout
                android:id="@+id/start_layout"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:layout_gravity="center_horizontal"
                android:layout_centerInParent="true">

                <TextView
                    android:id="@+id/text_view"
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:layout_marginTop="@dimen/lyric_margin_top"

                    android:gravity="center"
                    android:text="@string/textTitle2"
                    android:textSize="@dimen/lyric_size"
                    android:textIsSelectable="false"/>

            </LinearLayout>

        </LinearLayout>


        <!-- FRONT BACKGROUND -->


        <ImageView
            android:id="@+id/high_part_image"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:src="@drawable/af_background_up_side"
            android:scaleType="fitStart"/>

        <ImageView
            android:id="@+id/low_part_image"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:src="@drawable/af_background_down_side"
            android:scaleType="fitEnd"/>

    </RelativeLayout>


</LinearLayout>

Как вы можете видеть, я добавил

Теперь Фрагмент, загружающий этот .xml,:

public class MyFragment extends Fragment{


    /**
     * The fragment argument representing the item ID that this fragment
     * represents.
     */
    public static final String ARG_ITEM_ID = "item_id";

    /**
     * The content this fragment is presenting.
     */
    private Items.ItemList  mItem;

    /**
     * Mandatory empty constructor for the fragment manager to instantiate the
     * fragment (e.g. upon screen orientation changes).
     */
    public MyFragment() {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (getArguments().containsKey(ARG_ITEM_ID)) {
            // Load the content specified by the fragment
            // arguments. In a real-world scenario, use a Loader
            // to load content from a content provider.
            mItem = Items.ITEM_MAP.get(getArguments().getString(ARG_ITEM_ID));
        }
    }

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



        // Show the  content as text in a TextView.
        if (mItem != null) {
            ((TextView) rootView.findViewById(android.R.id.textTitle2)).setMovementMethod(new ScrollingMovementMethod());

        }
        return rootView;
    }
}

Наконец, у меня есть ActivityFragment, который реализует "YouTubePlayer.OnInitializedListener" и из которого я получаю фрагмент.

public class ItemDetailActivity extends FragmentActivity implements YouTubePlayer.OnInitializedListener{

    private TextView mTextView;
    private ImageView hImageView;
    private ImageView lImageView;

    public static final String API_KEY = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";

    public static final String VIDEO_ID = "BJVlU7d-4x0";

    private YouTubePlayer youTubePlayer;
    private YouTubePlayerFragment youTubePlayerFragment;

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

        if (savedInstanceState == null) {
            // Create the detail fragment and add it to the activity
            // using a fragment transaction.
            fragmentTransaction(getIntent().getStringExtra(ItemDetailFragment.ARG_ITEM_ID));


        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:

                NavUtils.navigateUpTo(this, new Intent(this, ItemListActivity.class));
                return true;
        }
        return super.onOptionsItemSelected(item);
    }


    @Override
    public void onInitializationFailure(YouTubePlayer.Provider provider,
                                        YouTubeInitializationResult result) {


            Toast.makeText(this,
                    "YouTubePlayer.onInitializationFailure(): " + result.toString(),
                    Toast.LENGTH_LONG).show();

    }

    @Override
    public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer player,
                                        boolean wasRestored) {

        Toast.makeText(getApplicationContext(),
                "YouTubePlayer.onInitializationSuccess()",
                Toast.LENGTH_LONG).show();



        if (!wasRestored) {
            player.cueVideo(VIDEO_ID);
        }

    }

    private void fragmentTransaction(String id) {

        Bundle arguments = new Bundle();
        Fragment fragment;

        String content = Items.ITEM_MAP.get(id).content;


        if(content.equalsIgnoreCase("Title 1")) {
            // Fragment transaction
            arguments.putString(ItemDetailFragment.ARG_ITEM_ID, id);
            fragment = new ItemDetailFragment();
            fragment.setArguments(arguments);

            getSupportFragmentManager().beginTransaction()
                    .replace(R.id.item_detail_container, fragment)
                    .commit();
        }


        if(content.equalsIgnoreCase("Title 2")) {
            // Fragment transaction
            arguments.putString(ItemDetailFragment.ARG_ITEM_ID, id);
            fragment = new MyFragment);
            fragment.setArguments(arguments);
            FragmentManager fm = getSupportFragmentManager();
            //youTubePlayerFragment = fragment.getChildFragmentManager().findFragmentById(R.id.youtubeplayer_fragment);
            //youTubePlayerFragment = (YouTubePlayerFragment)getFragmentManager().findFragmentById(R.id.youtubeplayer_fragment);

            //Fragment ytbfragment = fragment.getChildFragmentManager().findFragmentById(R.id.youtubeplayer_fragment);
            FragmentTransaction ft = fm.beginTransaction();
            ft.replace(R.id.item_detail_container, fragment);
            //ft.add(R.id.youtubeplayer_fragment, youTubePlayerFragment);

            ft.commit();

            //youTubePlayerFragment.initialize(API_KEY, this);
        }


        if(content.equalsIgnoreCase("Title 3")) {
            // Fragment transaction
            arguments.putString(ItemDetailFragment.ARG_ITEM_ID, id);
            fragment = new ItemDetailFragment();
            fragment.setArguments(arguments);
            getSupportFragmentManager().beginTransaction()
                    .replace(R.id.item_detail_container, fragment)
                    .commit();
        }
    }
}

В заголовке 2 я получаю фрагмент и где я пытаюсь получить внутренний фрагмент проигрывателя YouTube с помощью разных методов, но он не работает. Всегда загружайте файл .xml, пытаясь получить плеер, когда я пытаюсь получить YoutubeFragment.

Если я загружаю только оригинальный фрагмент, приложение получает XML файл.

В чем проблема?