26

我正在尝试在 RecyclerView 中加载 Youtube 视频缩略图。我面临一些问题。

这是我在适配器中所做的事情:

public static class ItemViewHolder extends RecyclerView.ViewHolder {

    private YouTubeThumbnailView thumb;
    public  Post                 post;

    public ItemViewHolder(View v) {
        thumb = (YouTubeThumbnailView) v.findViewById(R.id.youtube_thumbnail);
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
        if (holder instanceof ItemViewHolder) {

            ((ItemViewHolder) holder).thumb.initialize(YOUTUPEKEY, new YouTubeThumbnailView.OnInitializedListener() {
                @Override
                public void onInitializationSuccess(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader youTubeThumbnailLoader) {
                    youTubeThumbnailLoader.setVideo(VIDEOID);

                }

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

                }});
}}}

它工作正常,但我不这样做是正确的。当我在另一个活动中使用相同的适配器时,我收到此错误:

Activity com.example.yasser.version6.Mespublications has leaked ServiceConnection com.google.android.youtube.player.internal.r$e@4252bcb8 that was originally bound here

加载缩略图需要时间,有时在滑动时会在它们之间混合。

我添加了一个函数来释放所有的 Youtube 加载器:

public void ReleaseLoaders() {
    for (YouTubeThumbnailLoader loader : loaders.values()) {
        loader.release();
    }
}

我从 Activity Onstop() 调用这个函数:

@Override
public void onStop() {
    super.onStop();
    mAdapter.ReleaseLoaders();
}

它工作了一段时间,但有时会崩溃。

4

4 回答 4

32

你可以试试这个也许?它不使用 API,但速度很快。

使用此 URL 的 Picasso 在回收站视图中加载图像:

https://img.youtube.com/vi/ “这是你的视频ID”/default.jpg

- 编辑 -

经过一些研究和实验:

要获取默认的全尺寸缩略图,请执行此操作而不是 default.jpg

https://img.youtube.com/vi/ “这是你的视频ID”/0.jpg

这是链接:http ://www.reelseo.com/youtube-thumbnail-image/

编辑2:

刚刚发现 SO 中的某个人已经通过这个快速简便的解决方案给出了像我这样的答案,并且有更多的解释和选项可供您选择。

如何从 YouTube API 获取 YouTube 视频缩略图?


最终编辑:

这是工作代码。我最近使用 api 制作了一个应用程序,所以我发现了你收到错误的原因。这是因为您没有正确释放加载程序。

您可以通过两种方式释放 loader/loaders。

第一的

(首选,您将在几秒钟内了解原因)您可能希望在图像加载到视图中之后释放它,并且有一个监听器,它被称为 OnThumbNailLoadedListener。那就是我发布它的地方(如果你注意下面的代码)。这意味着您不必再处理这个实例了。加载缩略图后,您就完成了。

第二

由于 getView() 一直被调用,因此您必须释放 YouTubeThumbnailLoader 的新实例。这意味着您必须将所有这些存储在一个 ArrayList 中。当活动为 onStop(); 时,您只需执行高级 for 循环并在所有这些循环中调用 release;

现在您可能明白为什么首选第一种方式了。而且我知道你做了第二个选项,所以只要让你知道第一个选项总是可以保证工作(至少在我的情况下)。我在 Activity 中使用了 YouTubeSupportFragment,它运行良好。没有任何问题。您绝对可以使第二个选项起作用,但我认为您必须处理很多特殊情况。

final YouTubeThumbnailView youTubeThumbnailView = (YouTubeThumbnailView) convertView.findViewById(R.id.show_episode_thumbnail);
    youTubeThumbnailView.initialize(DeveloperKey.DEVELOPER_KEY, new YouTubeThumbnailView.OnInitializedListener() {
        @Override
        public void onInitializationSuccess(YouTubeThumbnailView youTubeThumbnailView, final YouTubeThumbnailLoader youTubeThumbnailLoader) {
            youTubeThumbnailLoader.setVideo(videoId);
            youTubeThumbnailLoader.setOnThumbnailLoadedListener(new YouTubeThumbnailLoader.OnThumbnailLoadedListener() {
                @Override
                public void onThumbnailLoaded(YouTubeThumbnailView youTubeThumbnailView, String s) {
                    youTubeThumbnailLoader.release();
                }

                @Override
                public void onThumbnailError(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader.ErrorReason errorReason) {

                }
            });
        }

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

        }
    });
于 2015-12-30T05:49:25.400 回答
15

onBindViewHolder您尝试YoutubeThumbnailView一次又一次地初始化相同的内容时,您可以在创建视图时对其进行一次初始化onCreateViewHolder。通过将视频 ID 设置为标签,YoutubeThumbnailView您可以防止混合(或)错误加载缩略图。


适配器。

    private class ThumbnailAdapter extends RecyclerView.Adapter{

    private final int UNINITIALIZED = 1;
    private final int INITIALIZING = 2;
    private final int INITIALIZED = 3;
    private int blackColor = Color.parseColor("#FF000000");
    private int transparentColor = Color.parseColor("#00000000");

    public class VideoViewHolder extends RecyclerView.ViewHolder{

        public YouTubeThumbnailView ytThubnailView = null;
        public ImageView ivYtLogo = null;
        public TextView tvTitle = null;

        public VideoViewHolder(View itemView) {
            super(itemView);
            ytThubnailView = (YouTubeThumbnailView) itemView.findViewById(R.id.yt_thumbnail);
            ivYtLogo = (ImageView) itemView.findViewById(R.id.iv_yt_logo);
            tvTitle = (TextView) itemView.findViewById(R.id.tv_title);

            initialize();
        }

        public void initialize(){
            ivYtLogo.setBackgroundColor(blackColor);
            ytThubnailView.setTag(R.id.initialize, INITIALIZING);
            ytThubnailView.setTag(R.id.thumbnailloader, null);
            ytThubnailView.setTag(R.id.videoid, "");

            ytThubnailView.initialize(API_KEY, new YouTubeThumbnailView.OnInitializedListener() {
                @Override
                public void onInitializationSuccess(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader youTubeThumbnailLoader) {
                    ytThubnailView.setTag(R.id.initialize, INITIALIZED);
                    ytThubnailView.setTag(R.id.thumbnailloader, youTubeThumbnailLoader);

                    youTubeThumbnailLoader.setOnThumbnailLoadedListener(new YouTubeThumbnailLoader.OnThumbnailLoadedListener() {
                        @Override
                        public void onThumbnailLoaded(YouTubeThumbnailView youTubeThumbnailView, String loadedVideoId) {
                            String currentVideoId = (String) ytThubnailView.getTag(R.id.videoid);
                            if(currentVideoId.equals(loadedVideoId)) {
                                ivYtLogo.setBackgroundColor(transparentColor);
                            }
                            else{
                                ivYtLogo.setBackgroundColor(blackColor);
                            }
                        }

                        @Override
                        public void onThumbnailError(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader.ErrorReason errorReason) {
                            ivYtLogo.setBackgroundColor(blackColor);
                        }
                    });

                    String videoId = (String) ytThubnailView.getTag(R.id.videoid);
                    if(videoId != null && !videoId.isEmpty()){
                        youTubeThumbnailLoader.setVideo(videoId);
                    }
                }

                @Override
                public void onInitializationFailure(YouTubeThumbnailView youTubeThumbnailView, YouTubeInitializationResult youTubeInitializationResult) {
                    ytThubnailView.setTag(R.id.initialize, UNINITIALIZED);
                    ivYtLogo.setBackgroundColor(blackColor);
                }
            });
        }
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = getLayoutInflater().inflate(R.layout.row_video_item, parent, false);
        VideoViewHolder videoViewHolder = new VideoViewHolder(view);
        return videoViewHolder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        final Entities e = entities.get(position);
        final VideoViewHolder videoViewHolder = (VideoViewHolder) holder;
        videoViewHolder.tvTitle.setText(e.name);
        videoViewHolder.ivYtLogo.setVisibility(View.VISIBLE);
        videoViewHolder.ytThubnailView.setTag(R.id.videoid, e.id);
        videoViewHolder.ivYtLogo.setBackgroundColor(blackColor);

        int state = (int) videoViewHolder.ytThubnailView.getTag(R.id.initialize);

        if(state == UNINITIALIZED){
            videoViewHolder.initialize();
        }
        else if(state == INITIALIZED){
            YouTubeThumbnailLoader loader = (YouTubeThumbnailLoader) videoViewHolder.ytThubnailView.getTag(R.id.thumbnailloader);
            loader.setVideo(e.id);
        }
    }

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

每行使用的布局是。

<?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">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="200dp">

    <com.google.android.youtube.player.YouTubeThumbnailView
        android:id="@+id/yt_thumbnail"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ImageView
        android:id="@+id/iv_yt_logo"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="center"
        android:src="@mipmap/youtube_play"
        android:background="#00000000"
        android:layout_centerInParent="true"/>

</RelativeLayout>

<TextView
    android:id="@+id/tv_title"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textColor="#FF000000"
    android:textSize="16sp"
    android:text="Title"/>

<View
    android:id="@+id/seperator"
    android:layout_width="match_parent"
    android:layout_height="2dp"
    android:layout_marginTop="5dp"
    android:layout_marginBottom="5dp"
    android:background="#FF642108"/>

</LinearLayout>

标签.xml。

位置:src/main/res/values/tags.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<item type="id" name="initialize" />
<item type="id" name="videoid"/>
<item type="id" name="thumbnailloader"/>
</resources>

在此处输入图像描述

于 2015-12-24T17:05:07.680 回答
2
public class VideoAdapter extends RecyclerView.Adapter<VideoAdapter.VideoHolder> {

    private List<VideoPojo> listvideo;
    private VideoPojo videoPojo;
    private Context mContext;
    private boolean readyForLoadingYoutubeThumbnail = true;
    String KEY = "AIzaSyA5kyaLgS7MKxS19uHf2CUsIOmDkv92DGU";

    public VideoAdapter(Context context, List<VideoPojo> listvideo) {
        this.listvideo = listvideo;
        this.mContext = context;
        videoPojo = new VideoPojo();
    }

    @Override
    public VideoAdapter.VideoHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.video_layout, parent, false);
        return new VideoHolder(view);
    }

    @Override
    public void onBindViewHolder(final VideoAdapter.VideoHolder holder, final int position) {

        holder.murl.setText(listvideo.get(position).getVideoUrl());
        final String url = listvideo.get(position).getVideoUrl();
        Log.d(TAG, "readyForLoadingYoutubeThumbnail" + readyForLoadingYoutubeThumbnail);
        if (readyForLoadingYoutubeThumbnail) {
            Log.d(TAG, "initializing for youtube thumbnail view...");
            readyForLoadingYoutubeThumbnail = false;
            holder.youTubeThumbnailView.initialize(KEY, new YouTubeThumbnailView.OnInitializedListener() {
                @Override
                public void onInitializationSuccess(final YouTubeThumbnailView youTubeThumbnailView, final YouTubeThumbnailLoader youTubeThumbnailLoader) {

                    youTubeThumbnailLoader.setVideo(url);
                    youTubeThumbnailLoader.setOnThumbnailLoadedListener(new YouTubeThumbnailLoader.OnThumbnailLoadedListener() {

                        @Override
                        public void onThumbnailLoaded(YouTubeThumbnailView childYouTubeThumbnailView, String s) {
                            holder.loding.setVisibility(View.GONE);
                            youTubeThumbnailLoader.release(); // spy ga memory lick
                        }

                        @Override
                        public void onThumbnailError(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader.ErrorReason errorReason) {
                            youTubeThumbnailLoader.release(); // spy ga memory lick
                        }
                    });

                    readyForLoadingYoutubeThumbnail = true;
                }

                @Override
                public void onInitializationFailure(YouTubeThumbnailView youTubeThumbnailView, YouTubeInitializationResult youTubeInitializationResult) {
                    //do nohing.. ada error, tambahin method ini jalan, error-nya lupa...
                    readyForLoadingYoutubeThumbnail = true;
                }
            });
        }
        holder.mdelate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                deleteVideoAlertDialog(listvideo.get(holder.getAdapterPosition()).getId(), holder.getAdapterPosition());
            }
        });

    }

    @Override
    public int getItemCount() {
        // Log.v(VideoAdapter.class.getSimpleName(), "" + listvideo.size());
        return listvideo.size();
    }

    public class VideoHolder extends RecyclerView.ViewHolder {

        YouTubeThumbnailView youTubeThumbnailView;
        protected FrameLayout playButton;
        TextView murl, mdelate;
        ImageView loding;

        public VideoHolder(View itemView) {
            super(itemView);
            mdelate = itemView.findViewById(R.id.mdelate);
            murl = itemView.findViewById(R.id.murl);
            playButton = itemView.findViewById(R.id.btnYoutube_player);
            youTubeThumbnailView = itemView.findViewById(R.id.youtube_thumbnail);
            loding = itemView.findViewById(R.id.loding);

            playButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    int position = getAdapterPosition();
                    String url = listvideo.get(position).getVideoUrl();
                    Toast.makeText(mContext, url, Toast.LENGTH_SHORT).show();
                    Intent intent = YouTubeStandalonePlayer.createVideoIntent((Activity) mContext,
                            KEY, url, 100, false, true);
                    mContext.startActivity(intent);
                }
            });
        }

    }

    private void deleteVideoAlertDialog(final int row_id, final int adapterPosition) {
        final AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

        // Setting Dialog Title
        alertDialog.setTitle("Delete");
        // Setting Dialog Message
        alertDialog.setMessage("Are you sure you want to delete this video");
        alertDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                if (SQLiteHelper.deleteUser(mContext, row_id)) {
                    listvideo.remove(adapterPosition);
                    notifyItemRemoved(adapterPosition);
                    notifyItemRangeChanged(adapterPosition, listvideo.size());
                } else {
                    Toast.makeText(mContext, "internal issue ", Toast.LENGTH_SHORT).show();
                }
            }
        });
        // Setting Negative "NO" Button
        alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                // Write your code here to invoke NO event
                dialog.cancel();
            }
        });
        // Showing Alert Message
        alertDialog.show();

    }

    public boolean addNewVideo(String Url, Context context) {
        videoPojo.setVideoUrl(Url);
        SQLiteHelper sqLiteHelper = new SQLiteHelper(context);
        if (sqLiteHelper.addNewVideo(context, videoPojo)) {
            listvideo.add(videoPojo);
            notifyDataSetChanged();
            Toast.makeText(context, "video Saved", Toast.LENGTH_SHORT).show();
            return true;
        }
        return false;
    }
}
于 2018-01-09T10:57:35.833 回答
0

从此 URL 获取高质量图像:

https://img.youtube.com/vi/<VIDEO_ID_HERE>/maxresdefault.jpg

然后通过使用 picasso 或 glide 库加载它。

对于此视频“ https://www.youtube.com/watch?v=BEScHJrjsmU ”,VIDEO_ID 为“BEScHJrjsmU”

于 2019-09-29T16:53:24.060 回答