如何使用Youtube API在RecyclerView中加载Youtube缩略图
我正尝试在RecyclerView中加载Youtube视频缩略图。 我正面临一些问题。
这是我在我的适配器中做的事情：
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，但我不是我正确做的。 当我在另一个活动中使用相同的适配器时，出现此错误：
Activity com.example.yasser.version6.Mespublications has leaked ServiceConnection com.google.android.youtube.player.internal.r$e@4252bcb8 that was originally bound here
加载缩略图需要一定的时间，有时会在滑动时混合它们。
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（）中调用这个函数：
@Override
public void onStop() {
super.onStop();
mAdapter.ReleaseLoaders();
}
它在一段时间内运行良好，但有时会崩溃。
你可以试试这个吗？ 它不使用API，但它很快。
使用Picasso从以下URL中将图像加载到回收站视图中：
https://img.youtube.com/vi/"here你的视频ID“/default.jpg
- 编辑 -
经过一些研究和实验：
要获得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/"here你的视频ID“/0.jpg
这里是链接：http://www.reelseo.com/youtube-thumbnail-image/
编辑2：
刚发现SO中的某个人已经用这个快速简单的解决方案给出了像我一样的答案，并且有更多的解释和选项供您选择。
如何从YouTube API获取YouTube视频缩略图？
最终编辑：
这是工作代码。 我最近用api做了一个应用程序，所以我发现你为什么会得到这个错误。 因为你没有正确地释放装载机。
您可以通过两种方式释放装载机/装载机。
第一
（首选，你会看到为什么在一秒）你想要释放它后，图像已被加载到视图中，并为它的一个监听器和它的OnThumbNailLoadedListener。 那就是我发布它的地方（如果你注意下面的代码）。 这意味着你不必再处理这个实例。 一旦缩略图加载完成。
第二
由于getView（）一直被调用，所以您必须发布YouTubeThumbnailLoader的新实例。 这意味着你必须将所有这些存储在ArrayList中。 当activity为onStop（）时，你只需要对它们进行高级循环和呼叫释放;
现在你可能会明白为什么第一种方式是首选。 而且我知道你做了第二个选择，所以让你知道第一个选项总能保证工作（至少在我的情况下）。 我在一个Activity中使用了一个YouTubeSupportFragment，它工作正常。 没有任何问题。 你绝对可以做出第二种选择，但你必须处理很多我认为特殊的情况。
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) {
}
});
在onBindViewHolder您试图一次又一次初始化相同的YoutubeThumbnailView ，而在onCreateViewHolder中创建视图时，您可以初始化它。 通过将视频标识设置为YoutubeThumbnailView标签，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>
公共类VideoAdapter扩展RecyclerView.Adapter {
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;
}
}
链接地址: http://www.djcxy.com/p/28913.html上一篇: How to load Youtube thumbnails in a RecyclerView using Youtube API