Android CardView中的所有位置都不可见ProgressBar

我试图添加youtube播放器API，当点击事件发生在缩略图上时，可见性消失，进度条出现，当视频开始播放时，进度条消失。一开始，ProgressBar不见了

layout.xml

<RelativeLayout
            android:id="@+id/rl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/hr"
            android:layout_centerHorizontal="true"
            android:gravity="center_horizontal">


            <com.example.prateek.videoplayertest.YoutubePlayerView        
                android:id="@+id/ytplayer"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:layout_alignParentTop="true"
                android:layout_centerVertical="true"
                android:layout_marginLeft="-3dp"
                android:adjustViewBounds="true"
                android:scaleType="centerCrop">

                <ImageView
                    android:id="@+id/yt_thumbnail"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_alignParentTop="true"
                    android:layout_marginLeft="-3dp"
                    android:adjustViewBounds="true"
                    android:background="#000000"
                    android:scaleType="fitXY">
                </ImageView>
            </com.example.prateek.videoplayertest.YoutubePlayerView>

            <ProgressBar
                android:id="@+id/item_progress"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:foregroundGravity="center"
                android:indeterminate="true"
                android:visibility="gone"
                android:layout_centerInParent="true" />


        </RelativeLayout>

但是，当我第一次单击任何视频时，进度条会出现，并且工作正常，但对于下一个视频，当我单击进度条时，进度条不会出现。我不明白为什么？ 我希望当我点击视频缩略图时，卡视图中所有位置的进度条都可见。 有人能帮我吗？ 任何帮助都将不胜感激

---

谢谢你

最后，得到了解决方案，没有设置progressBar的可见性，而是将可见性设置为不可见，并最初将progressBar的可见性设置为不可见。 希望这会有帮助。 多谢各位

@Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {

Picasso.with(context).load(video_thumbnail.get(position)).memoryPolicy(MemoryPolicy.NO_CACHE, MemoryPolicy.NO_STORE).into(holder.yt_video_thumb);
                holder.ytplayer.setVisibility(View.VISIBLE);
                holder.ytplayer.setAutoPlayerHeight(context);

                final YTParams params = new YTParams();
                params.setPlaybackQuality(PlaybackQuality.small);
                holder.yt_video_thumb.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        holder.flag_y = 1;
                        if(holder.flag_x == 1 && holder.flag_y == 1){
                            holder.ytplayer.play();
                        }
                            holder.yt_video_thumb.setVisibility(View.GONE);
                            holder.yt_progress.setVisibility(View.VISIBLE);
                    }
                });
                holder.ytplayer.initialize(video_id.get(position), params, new YoutubePlayerView.YouTubeListener() {

                    @Override
                    public void onReady() {
                        holder.flag_x = 1;
                        if(holder.flag_x == 1 && holder.flag_y == 1){
                            holder.ytplayer.play();
                        }

                        JLog.i("onReady()");
                    }

                    @Override
                    public void onStateChange(YoutubePlayerView.STATE state) {
                        /**
                         * YoutubePlayerView.STATE
                         *
                         * UNSTARTED, ENDED, PLAYING, PAUSED, BUFFERING, CUED, NONE
                         *
                         */
                        if(state == YoutubePlayerView.STATE.ENDED){
                            holder.yt_video_thumb.setVisibility(View.VISIBLE);                       }
                        if(state == YoutubePlayerView.STATE.BUFFERING){
                            if(holder.flag_x == 1 && holder.flag_y == 1){
                                holder.ytplayer.play();
                            }
                            holder.ytplayer.play();

                        }

                        if(state == YoutubePlayerView.STATE.PLAYING){
                            holder.yt_progress.setVisibility(View.GONE);
                            holder.flag_y = 0;
                            holder.flag_x = 0;
                            Log.d("ValueCHECK", holder.flag_y+" "+ holder.flag_x);
                        }
                        if(state == YoutubePlayerView.STATE.PAUSED){
                            holder.yt_video_thumb.setVisibility(View.VISIBLE);

                        }

                        JLog.i("onStateChange(" + state + ")");
                    }

                    @Override
                    public void onPlaybackQualityChange(String arg) {
                        JLog.i("onPlaybackQualityChange(" + arg + ")");
                    }

                    @Override
                    public void onPlaybackRateChange(String arg) {
                        JLog.i("onPlaybackRateChange(" + arg + ")");
                    }

                    @Override
                    public void onError(String arg) {
                        holder.yt_video_thumb.setVisibility(View.VISIBLE);
                        JLog.e("onError(" + arg + ")");
                    }

                    @Override
                    public void onApiChange(String arg) {
                        JLog.i("onApiChange(" + arg + ")");
                    }

                    @Override
                    public void onCurrentSecond(double second) {

                    }


                    @Override
                    public void onDuration(double duration) {
                        // total duration
                        JLog.i("onDuration(" + duration + ")");
                    }

                    @Override
                    public void logs(String log) {
                        // javascript debug log. you don't need to use it.
                        JLog.d(log);
                    }
                });
}