RecycleView滑动视频列表自动播放

实现非常简单，直接步入正题。

实现原理
通过监听RecycleView的OnScrollListener接口。重写onScrollStateChanged && onScrolled 判断视频view在屏幕的位置实现自动播放。

效果图

视频播放使用 JiaoZiVideoPlayer

自定义类MyJzvdStd 继承 JzvdStd

    public MyJzvdStd(Context context) {
        super(context);
    }

    public static boolean AUTOPLAY = false;

    public MyJzvdStd(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.start:
                if (jzDataSource == null || jzDataSource.urlsMap.isEmpty() || jzDataSource.getCurrentUrl() == null) {
                    Toast.makeText(getContext(), getResources().getString(R.string.nourl), Toast.LENGTH_SHORT).show();
                    return;
                }
                if (currentState == CURRENT_STATE_NORMAL) {
                    startVideo();
                    onEvent(JZUserAction.ON_CLICK_START_ICON);
                    AUTOPLAY = true;
                } else if (currentState == CURRENT_STATE_PLAYING) {
                    onEvent(JZUserAction.ON_CLICK_PAUSE);
                    JZMediaManager.pause();
                    onStatePause();
                    AUTOPLAY = false;
                } else if (currentState == CURRENT_STATE_PAUSE) {
                    onEvent(JZUserAction.ON_CLICK_RESUME);
                    JZMediaManager.start();
                    onStatePlaying();
                    AUTOPLAY = true;
                } else if (currentState == CURRENT_STATE_AUTO_COMPLETE) {
                    onEvent(JZUserAction.ON_CLICK_START_AUTO_COMPLETE);
                    startVideo();
                }
                break;
            default:
                super.onClick(v);
                break;
        }

    }
}

该类主要定义是否滑动自动播放的标识，重写onClick方法获取点击播放的事件。

public static boolean AUTOPLAY = false;

点击开始播放：开启滑动自动播放，点击暂停播放停止滑动自动播放

新建FeedScrollListener

public class FeedScrollListener extends RecyclerView.OnScrollListener {
    private int firstVisibleItem = 0;
    private int lastVisibleItem = 0;
    private int visibleCount = 0;
    /**
     * 视频状态标签
     */
    private enum VideoTagEnum {

        /**
         * 自动播放视频
         */
        TAG_AUTO_PLAY_VIDEO,

        /**
         * 暂停视频
         */
        TAG_PAUSE_VIDEO
    }

    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
        switch (newState) {
            case RecyclerView.SCROLL_STATE_IDLE:
                if (MyJzvdStd.AUTOPLAY) {
                    autoPlayVideo(recyclerView, VideoTagEnum.TAG_AUTO_PLAY_VIDEO);
                }
                break;
            default:
                autoPlayVideo(recyclerView, VideoTagEnum.TAG_PAUSE_VIDEO);
                break;
        }
    }

    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
        if (layoutManager instanceof LinearLayoutManager) {
            LinearLayoutManager linearManager = (LinearLayoutManager) layoutManager;
            firstVisibleItem = linearManager.findFirstVisibleItemPosition();
            lastVisibleItem = linearManager.findLastVisibleItemPosition();
            visibleCount = lastVisibleItem - firstVisibleItem;
        }

    }

    /**
     * 循环遍历 可见区域的播放器
     * 然后通过 getLocalVisibleRect(rect)方法计算出哪个播放器完全显示出来
     * <p>
     * getLocalVisibleRect相关链接：http://www.cnblogs.com/ai-developers/p/4413585.html
     *
     * @param view
     * @param handleVideoTag 视频需要进行状态
     */
    private void autoPlayVideo(RecyclerView view, VideoTagEnum handleVideoTag) {
        for (int i = 0; i < visibleCount; i++) {
            MyJzvdStd homeGSYVideoPlayer = view.getChildAt(i).findViewById(R.id.video);
            Rect rect = new Rect();
            homeGSYVideoPlayer.getLocalVisibleRect(rect);
            int videoheight = homeGSYVideoPlayer.getHeight();
            if (rect.top == 0 && rect.bottom == videoheight) {
                handleVideo(handleVideoTag, homeGSYVideoPlayer);
                break;
            }
        }
    }

    /**
     * 视频状态处理
     *
     * @param handleVideoTag     视频需要进行状态
     * @param homeGSYVideoPlayer JZVideoPlayer播放器
     */
    private void handleVideo(VideoTagEnum handleVideoTag, MyJzvdStd homeGSYVideoPlayer) {
        switch (handleVideoTag) {
            case TAG_AUTO_PLAY_VIDEO:
                if ((homeGSYVideoPlayer.currentState != MyJzvdStd.CURRENT_STATE_PLAYING)) {
                    // 进行播放
                    homeGSYVideoPlayer.startVideo();
                }
                break;
            case TAG_PAUSE_VIDEO:
              /*  if ((homeGSYVideoPlayer.currentState != MyJzvdStd.CURRENT_STATE_PAUSE)) {
                    // 模拟点击播放Button,实现暂停视频
                    homeGSYVideoPlayer.startButton.performClick();
                }*/
                break;
            default:
                break;
        }
    }

}

滑动播放的主要逻辑

 @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
        switch (newState) {
            case RecyclerView.SCROLL_STATE_IDLE:
                if (MyJzvdStd.AUTOPLAY) {
                    autoPlayVideo(recyclerView, VideoTagEnum.TAG_AUTO_PLAY_VIDEO);
                }
                break;
            default:
                autoPlayVideo(recyclerView, VideoTagEnum.TAG_PAUSE_VIDEO);
                break;
        }
    }

后记
先讲到这里吧，喜欢的小伙伴别忘了关注和点赞哦~

附上完整项目地址：https://github.com/dingshuangdian/hodgepodge
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