android - RecyclerView 中的 YouTubePlayerFragment

Question

我有一个 RecyclerView，里面有 CardView。我希望每个 CardView 都有自己的 YouTubePlayerFragment。即使它们不能同时全部激活，我什至无法在任何 CardView 中实例化 YouTubePlayerFragment，而是在 RecyclerView 中实例化第一个。当点击卡上应该设置 YouTubePlayerFragment 的按钮时，它总是在第一张卡上设置它，即使我点击了第二张卡。我尝试做的事情可行吗？

以下是代码的相关部分:

CardView XML 中 fragment 的持有者:(直接在 xml 中使用 fragment 会给出二进制 XML 异常，可能是由于 fragment 中某处的 fragment )

<FrameLayout
        android:id="@+id/youtube_holder"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignLeft="@+id/layout_video_thumbnail"
        android:layout_alignStart="@+id/layout_video_thumbnail"
        android:layout_alignRight="@+id/layout_video_thumbnail"
        android:layout_alignEnd="@+id/layout_video_thumbnail"
        android:visibility="visible"/>

ViewHolder:

public class VideoViewHolder extends RecyclerView.ViewHolder {

protected FrameLayout containerYouTubePlayer;
protected TextView textViewTitle;
protected ImageView imageViewThumbNail;
protected Button buttonPreview, buttonSet;
protected Context activityContext;

public VideoViewHolder(Context activityContext, View itemView) {
    super(itemView);

    this.activityContext = activityContext;
    containerYouTubePlayer = (FrameLayout) itemView.findViewById(R.id.youtube_holder);
    textViewTitle = (TextView) itemView.findViewById(R.id.textView_title);
    imageViewThumbNail = (ImageView) itemView.findViewById(R.id.imageView_video_thumbnail);
    buttonPreview = (Button) itemView.findViewById(R.id.button_preview);
    buttonSet = (Button) itemView.findViewById(R.id.button_set);
}
}

RecyclerView 适配器:

public class VideoCardAdapter extends RecyclerView.Adapter<VideoViewHolder> {

private static final String TAG = "VidWall.VideoCardAdapter";
private List<VideoInfo> videoList;
private Context activityContext;

public VideoCardAdapter(Context activityContext, List<VideoInfo> videoList) {
    this.activityContext = activityContext;
    this.videoList = videoList;
}

@Override
public int getItemCount() {
    return videoList.size();
}

@Override
public void onBindViewHolder(final VideoViewHolder videoViewHolder, int i) {
    final VideoInfo videoInfo = videoList.get(i);
    videoViewHolder.textViewTitle.setText(videoInfo.displayName);
    videoViewHolder.imageViewThumbNail.setImageDrawable(ContextCompat.getDrawable(activityContext, activityContext.getResources().getIdentifier(videoInfo.fileNameThumbnail, "drawable", activityContext.getPackageName())));
    videoViewHolder.buttonPreview.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Utils.logDebug(TAG, "buttonPreview clicked");

            // Add the YouTube fragment to view
            final YouTubePlayerFragment youTubePlayerFragment = YouTubePlayerFragment.newInstance();
            ((Activity) activityContext).getFragmentManager().beginTransaction().replace(videoViewHolder.containerYouTubePlayer.getId(), youTubePlayerFragment).commit();
            youTubePlayerFragment.initialize(WallpapersActivity.Y_KEY, new YouTubePlayer.OnInitializedListener() {
                @Override
                public void onInitializationSuccess(YouTubePlayer.Provider provider, final YouTubePlayer youTubePlayer, boolean b) {
                    Utils.logDebug(TAG, "onInitializationSuccess");

                    youTubePlayer.cueVideo("xxxxxxxx");
                    youTubePlayer.setShowFullscreenButton(false);
                }

                @Override
                public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) {
                    Utils.logError(TAG, "Could not initialize YouTubePlayer");
                }
            });

            videoViewHolder.containerYouTubePlayer.setVisibility(View.VISIBLE);
        }
    });

}

@Override
public VideoViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {

    View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.layout_wallpaper_card, viewGroup, false);

    return new VideoViewHolder(activityContext, itemView);
}

}

Answer 1

所以我想通了。只要为 YouTube FrameLayout 设置一个唯一的 id，activity 就会正确地将 fragment 插入到正确的卡片上!您可以在运行时对 View 设置 Id()，因此只需确保它们在某种程度上彼此不同即可。

   // Add the YouTube fragment to view
   wallpaperInfo.youTubePlayerFragment = YouTubePlayerFragment.newInstance();
   // Must set a unique id to the framelayout holding the fragment or else it's always added to the first item in the recyclerView (the first card)
   videoViewHolder.containerYouTubePlayer.setId(wallpaperInfo.id);
   ((Activity) activityContext).getFragmentManager().beginTransaction().add(videoViewHolder.containerYouTubePlayer.getId(), wallpaperInfo.youTubePlayerFragment).addToBackStack(null).commit();