使用PagerIndicator的问题

向布局文件添加TabPageIndicator的时候出现问题

   错误情况：

      Rendering Problems Missing styles.

      Is the correct theme chosen for this layout?

      Use the Theme combo box above the layout to choose a different layout,

      or fix the theme style references.

      Failed to find style 'vpiTabPageIndicatorStyle' in current theme

   解决方法：

      在priview里把Theme调整为PageIndivatorDefault