/** 初始化数据 */
  private PictureData initData() {
    String json;
    if (isFirstData) {
      json = LocalFileUtils.getStringFormAsset(this, "picture.json");
    } else {
      json = LocalFileUtils.getStringFormAsset(this, "picture1.json");
    }
    isFirstData = !isFirstData;

    // 使用JsonTool工具将JSON数据封装到实例对象
    return JsonTool.toBean(json, PictureData.class);
  }
  /**
   * 添加头部View LoopView
   *
   * <p>这里使用的是LoopView开源项目,项目地址:https://github.com/xuehuayous/Android-LoopView
   *
   * @return void
   */
  private void addFooterView() {
    LayoutInflater inflater = LayoutInflater.from(this);
    FrameLayout layout = (FrameLayout) inflater.inflate(R.layout.recycler_header, null);
    AdLoopView mAdLoopView = (AdLoopView) layout.findViewById(R.id.home_frag_rotate_vp);
    mWrapAdapter.addFooterView(layout);

    // 初始化LoopView数据
    String json = LocalFileUtils.getStringFormAsset(this, "loopview.json");
    mAdLoopView.refreshData(json);
    mAdLoopView.startAutoLoop();
  }