基于GSYVideoPlayer RecyclerView 列表

由于需要做一个需求，基于GSYVideoPlayer对列表的视频自动播放，在此记录下。
分四个步骤

• 监听列表滑动状态
• 获取播放器控件
• 判断播放器可见状态
• 根据状态进行播放

监听滑动 recyclerView.addOnScrollListener(）

@Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState)
            {
                super.onScrollStateChanged(recyclerView, newState);
                // 监听滑动
                FeedLiveAutoPlayHelper.autoPlay(recyclerView,newState);
            }

辅助类

/**
 * 列表自动播放辅助类
 */
public class FeedLiveAutoPlayHelper {
    public static final String TAG = "FeedLiveAutoPlayHelper";

    public static void autoPlay(RecyclerView recyclerView, int newState) {
        Log.d(TAG, "[autoPlay]: newState:" + newState);
        if (newState != 0) {
            return;
        }
        //获取播放器控件
        FeedLiveGSYVideoPlayer livePlayerView = getLivePlayerView(recyclerView);
        if (livePlayerView == null) {
            Log.d(TAG, "[autoPlay]: livePlayerView is null");
            return;
        }
        // 判断播放器可见状态
        if (!isViewVisible(livePlayerView)) {
            Log.d(TAG, "[autoPlay]: is not Completely Visible");
            return;
        }
        // 播放器的状态，没在播放才播放。。。
        int currentState = livePlayerView.getCurrentState();
        Log.d(TAG, "[autoPlay] : currentState:" + currentState);
        if (currentState != CURRENT_STATE_NORMAL) {
            Log.d(TAG, "[autoPlay]: livePlayerView is playing");
            return;
        }
        // 开始播放
        livePlayerView.startPlayLogic();
        Log.d(TAG, "[autoPlay]: auto startPlayLogic");
    }

    /**
     * 判断view是否可见
     *
     * @param view View
     * @return boolean
     */
    private static boolean isViewVisible(View view) {
        if (view == null) {
            return false;
        }
        Rect rect = new Rect();
        // 可见
        boolean isVisible = view.getGlobalVisibleRect(rect);
        // 完全可见
        boolean isCompletelyVisible = isVisible && (rect.bottom - rect.top >= view.getHeight());
        // 三分之一可见
        boolean isHalfVisible = isVisible && (rect.bottom - rect.top >= view.getHeight() / 3);
        Log.d(TAG, "[isViewVisible]: Visible:" + isVisible);
        Log.d(TAG, "[isViewVisible]: CompletelyVisible:" + isCompletelyVisible);
        Log.d(TAG, "[isViewVisible]: HalfVisible:" + isHalfVisible);
        return isHalfVisible;
    }

    /**
     * 获取View
     *
     * @param recyclerView recyclerView
     * @return FeedLiveGSYVideoPlayer
     */
    private static FeedLiveGSYVideoPlayer getLivePlayerView(RecyclerView recyclerView) {
        if (recyclerView == null) {
            return null;
        }
        RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager();
        if (!(layoutManager instanceof LinearLayoutManager)) {
            Log.d(TAG, "[getLivePlayerView]: layoutManager is not linear:");
            return null;
        }
        LinearLayoutManager linearLayoutManager = (LinearLayoutManager) layoutManager;
        int firstVisibleItemPosition = linearLayoutManager.findFirstVisibleItemPosition();
        int lastVisibleItemPosition = linearLayoutManager.findLastVisibleItemPosition();
        // 遍历可见子项
        for (int i = firstVisibleItemPosition; i <= lastVisibleItemPosition; i++) {
            RecyclerView.ViewHolder viewHolder = recyclerView.findViewHolderForAdapterPosition(i);
            if (viewHolder == null) {
                continue;
            }
            if (!(viewHolder instanceof FeedLiveHolder)) {
                continue;
            }
          // 这里换成自己的Holder
            FeedLiveHolder feedLiveHolder = (FeedLiveHolder) viewHolder;
            return feedLiveHolder.getGsyVideoPlayer();
        }
        return null;
    }