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The YouTubePlayerSupportFragment function in a ListView element is null

I am trying to use YouTubePlayerSupportFragmentin an element ListView. ListViewis inside a Fragment, that in Activity. Since there are nested fragments, I use the method getChildFragmentManager()to try to find the fragment from the XML layout. Here is the code.

Java

convertView = inflater.inflate(R.layout.youtube_post_layout, null);
YouTubePlayerSupportFragment youTubePlayerFragment = (YouTubePlayerSupportFragment) getChildFragmentManager().findFragmentById(R.id.youtube_video);
if (youTubePlayerFragment == null) {
    Log.i("YouTube", "player is null");
} else {
    Log.i("YouTube", youTubePlayerFragment.toString());
}

XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <include layout="@layout/post_base_layout" />

    <fragment
        android:name="com.google.android.youtube.player.YouTubePlayerSupportFragment"
        android:id="@+id/youtube_video"
        android:layout_width="match_parent"
        android:layout_height="240dp"
        android:layout_marginLeft="62dp"
        android:layout_marginRight="32dp"
        android:background="@color/light_grey"
        android:cropToPadding="true"
        android:padding="1dp"
        android:scaleType="centerCrop" />

    <include layout="@layout/post_bottom_layout" />

</LinearLayout>

The problem is that when I try to create a fragment by executing findFragmentById()to get it from XML, it returns null and what is sent to the stack trace.

I am trying to follow the YouTube API samples and make the changes necessary for the nested fragments, but I can not figure out what causes the problem.

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2 answers

.

-, XML . , getChildFragmentManager .

-, ( ), , . , inflate . FragmentManager backstack, , XML .

, , ListView. , , , ListView AdapterView , .

:

+3

. Fragment ListView ( , , )

( @ivagarz):

1- YouTube. YouTubePlayerView ListView Activity Activity YouTubeBaseActivity API Android- YouTube Android ( , )

2- YouTubeThumbnailView YouTube ListView YouTube YouTube. .

:

enter image description here

youtube player, :

YouTubePlayerSupportFragment: YouTubeThumbnailView YouTubePlayerSupportFragment , :

A- YouTubePlayerSupportFragment ( Fragment Id).

B- ListView As .

Ex:

list_item.xml ListView:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/parent_relativeLayout"
   android:layout_width="match_parent"
   android:layout_height="match_parent" >

    <com.google.android.youtube.player.YouTubeThumbnailView
            android:id="@+id/youtube_thumbnail"
            android:layout_width="fill_parent"
            android:layout_height="250dp"
            android:scaleType="centerCrop"
            android:visibility="gone"/>

    <RelativeLayout android:id="@+id/relativeLayout_over_youtube_thumbnail"
        android:layout_width="fill_parent"
        android:layout_height="250dp"
        android:background="@color/color_background_transparent"
        android:visibility="gone">

        <ImageView android:id="@+id/btnYoutube_player"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="center"
            android:src="@drawable/youtube_player"/>

    </RelativeLayout>

</RelativeLayout>

getView mehtod ListView:

  public View getView(int position, View convertView, ViewGroup parent) {

    convertView = inflator.inflate(R.layout.list_item.xml, parent, false);
    final RelativeLayout relativeLayoutOverYouTubeThumbnailView = (RelativeLayout) convertView.findViewById(R.id.relativeLayout_over_youtube_thumbnail);
    final YouTubeThumbnailView youTubeThumbnailView = (YouTubeThumbnailView) convertView.findViewById(R.id.youtube_thumbnail);

    // get parent relative layout
    RelativeLayout parentRelativeLayout = (RelativeLayout) convertView.findViewById(R.id.parent_relativeLayout);
    // then create dynamic FrameLayout
    FrameLayout.LayoutParams dynamicFrameLayoutParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
    final FrameLayout dynamicFrameLayout = new FrameLayout(ctx);
        dynamicFrameLayout.setId(Different_ID);
        dynamicFrameLayout.setLayoutParams(dynamicFrameLayoutParams);
    // then add dynamic FrameLayout as children in parent relative layout
    parentRelativeLayout.addView(dynamicFrameLayout);

    ImageView youtubePlayerButton = (ImageView) convertView.findViewById(R.id.btnYoutube_player);
    youtubePlayerButton.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {

            View parentView = (View) v.getParent().getParent();
            YouTubeThumbnailView youTubeThumbnailView = (YouTubeThumbnailView) parentView.findViewById(R.id.youtube_thumbnail);
            RelativeLayout relativeLayoutOverYouTubeThumbnailView = (RelativeLayout) parentView.findViewById(R.id.relativeLayout_over_youtube_thumbnail);
            youTubeThumbnailView.setVisibility(View.GONE);
            relativeLayoutOverYouTubeThumbnailView.setVisibility(View.GONE);
            YouTubeFragment youTubeFragment = new YouTubeFragment();
                youTubeFragment.youTubeFragmentInitialize(VideoID, youTubeFragment, parentView);

            getSupportFragmentManager()
               .beginTransaction()
                    .replace(dynamicFrameLayout.getId(), youTubeFragment)
                    .commit();

        }
    });

    final YouTubeThumbnailLoader.OnThumbnailLoadedListener  onThumbnailLoadedListener = new YouTubeThumbnailLoader.OnThumbnailLoadedListener(){
        @Override
        public void onThumbnailError(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader.ErrorReason errorReason) {

        }

        @Override
        public void onThumbnailLoaded(YouTubeThumbnailView youTubeThumbnailView, String s) {
            loadingImage.setVisibility(View.GONE);
            youTubeThumbnailView.setVisibility(View.VISIBLE);
            relativeLayoutOverYouTubeThumbnailView.setVisibility(View.VISIBLE);
        }
    };

    youTubeThumbnailView.initialize(API_KEY, new YouTubeThumbnailView.OnInitializedListener() {
            @Override
            public void onInitializationSuccess(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader youTubeThumbnailLoader) {

                youTubeThumbnailLoader.setVideo(VideoID);
                youTubeThumbnailLoader.setOnThumbnailLoadedListener(onThumbnailLoadedListener);
            }

            @Override
            public void onInitializationFailure(YouTubeThumbnailView youTubeThumbnailView, YouTubeInitializationResult youTubeInitializationResult) {

            }
        });
}

, Fragment YouTubePlayerSupportFragment:

public class YouTubeFragment  extends YouTubePlayerSupportFragment {

    public void youTubeFragmentInitialize(final String videoId, final YouTubeFragment fragment, final View parent) {

        fragment.initialize(apiKey, new YouTubePlayer.OnInitializedListener() {
            @Override
            public void onInitializationSuccess(YouTubePlayer.Provider provider, final YouTubePlayer youTubePlayer, boolean wasRestored) {

           youTubePlayer.setShowFullscreenButton(false);
                if (!wasRestored) {
                    youTubePlayer.loadVideo(videoId);
                }
            }

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

                Log.e("app", youTubeInitializationResult.toString());
            }
        });
    }
}

YouTubeStandalonePlayer Activity extends YouTubeBaseActivity: , youtube player,

Intent intent = YouTubeStandalonePlayer.createVideoIntent(context, YOUR_DEVELOPER_KEY, VIDEO_ID);
 startActivity(intent);
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