如何在另一个片段中使用YouTubePlayerFragment加载YouTubePlayer?(安卓)

Question

我想使用 API 中的 YouTubePlayerFragment 在片段中加载 YoutubePlayer

我的片段.xml文件是：

<?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>

如您所见，我添加了一个

现在，加载此.xml的片段是：

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;
    }
}

最后，我有一个实现"YouTubePlayer.OnInitializedListener"的ActivityFragment，并从中得到片段。

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();
        }
    }
}

在标题 2 中是我获得片段的地方，也是我尝试使用不同方法获取 youtube 播放器内部片段的地方，但它不起作用。当我尝试获取 de YoutubeFragment 时，总是崩溃加载.xml试图让播放器形成。

如果我只加载原始片段，应用程序会很好地获取 xml 文件。

问题出在哪里？

Answer 1

我已经在这个问题上工作了几天，我终于找到了解决方案。我会在这里发布代码好吗？

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View fragmentYoutubeView = inflater.inflate(R.layout.fragment_youtube, container, false);
    mYoutubePlayerFragment = new YouTubePlayerSupportFragment();
    mYoutubePlayerFragment.initialize(youtubeKey, this); 
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.replace(R.id.fragment_youtube_player, mYoutubePlayerFragment);
    fragmentTransaction.commit();
    mYoutubeVideoTitle = (TextView)fragmentYoutubeView.findViewById(R.id.fragment_youtube_title);
    mYoutubeVideoDescription = (TextView)fragmentYoutubeView.findViewById(R.id.fragment_youtube_description);
    mYoutubeVideoTitle.setText(getArguments().getString(Resources.KEY_VIDEO_TITLE));
    mYoutubeVideoDescription.setText(getArguments().getString(Resources.KEY_VIDEO_DESC));
    VideoFragment.setTextToShare(getArguments().getString(Resources.KEY_VIDEO_URL));
    return fragmentYoutubeView;
}

在此代码中，我通过Intent传递youtube视频ID（url），标题和描述，并将其放在textViews中。为了播放youtubePlayerFragment，我使用了一个frameLayout（fragment_youtube_player），就像这样：

<FrameLayout
    android:id="@+id/fragment_youtube_player"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"/>

我把权重放为 1，因为包含框架和文本视图的 LinearLayout 的权重为 3，以强制视图占用我告诉他们的空间。

问题的工具包在这里：

mYoutubePlayerFragment = new YouTubePlayerSupportFragment();
    mYoutubePlayerFragment.initialize(youtubeKey, this); 
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.replace(R.id.fragment_youtube_player, mYoutubePlayerFragment);
    fragmentTransaction.commit();

此代码以编程方式将 FrameLayout 替换为 youtubePlayerSupportFragment。所有这些都在一个Android片段中，它可以工作。

编辑 1：

我看到一些关于Fragment如何管理Youtube API的初始化成功和失败的困惑。为了澄清我的片段标题是这样的：

public class FragmentYoutubePlayerGenerator extends Fragment
implements YouTubePlayer.OnInitializedListener{

实现的两种方法非常简单：

@Override
public void onInitializationSuccess(Provider provider,
        YouTubePlayer player,
        boolean wasRestored) {  
    if(!wasRestored){
        player.cueVideo(mVideoInfo.getId());
    }
}
@Override
public void onInitializationFailure(Provider provider,
        YouTubeInitializationResult result) {   
    if (result.isUserRecoverableError()) {
        result.getErrorDialog(this.getActivity(),1).show(); 
    } else {
        Toast.makeText(this.getActivity(), 
                "YouTubePlayer.onInitializationFailure(): " + result.toString(), 
                Toast.LENGTH_LONG).show(); 
    }
}

我让开发人员选择在错误处理中是否保留 result.toString（），一些用户不喜欢在屏幕上看到很多他们不理解的数字，但放置它们也很好，因为他们可以快照它并将它们发送给您以调试错误。