RecyclerView+SnapHelper实现无限循环筛选控件

private void initData(){
    if (filterItemEntity != null) {
      if (!TextUtils.isEmpty(filterItemEntity.getTitle())) {
        filtrationType.setText(filterItemEntity.getTitle());
      }
      if (filterItemEntity.getOptions() != null) {
        mAdapter = new ADA_FilterWheel(mContext, filterItemEntity.getOptions());
      }
      mLoopRecyclerView.setAdapter(mAdapter);
      if (adaItemCallback!=null){
        adaItemCallback.sendItems(mAdapter.getItemRawCount());
      }
      //设置滚动监听
      mLoopRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
          super.onScrollStateChanged(recyclerView, newState);
          //滚动停止时，获取recycler显示的第一项的position
          if (newState == RecyclerView.SCROLL_STATE_IDLE) {
            int items = mAdapter.getItemRawCount();
            int firstItemPosition =linearManager.findFirstVisibleItemPosition();
            //高亮显示最左边的item
            mAdapter.highlightItem(firstItemPosition % items);
          }
          //滚动过程中，释放选中状态
          if (newState == RecyclerView.SCROLL_STATE_DRAGGING) {
            mAdapter.reset();
          }
        }

        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
          super.onScrolled(recyclerView, dx, dy);
        }
      });
      //找到当前选中的实体
      for (int i = 0; i < filterItemEntity.getOptions().size(); i++) {
        FilterOptionsEntity bean = filterItemEntity.getOptions().get(i);
        if (bean.isCheck()) {
          // 当前选中实体类
          currentBean = bean;
          break;
        }
      }
    }
  }