android - Rendering problems with IO source code -

I recently downloaded the source for the IO scheduling app, which Google released, but its in the Android studio I have trouble using it. Whenever I try to see a layout, I get an error

  rendering problems missing styles What is the right theme for this layout selected?  

and

  Could not find the theme resource? Android: Attr / padding left for current theme  

What is going wrong in my build to cause any ideas? Also note that the source fixes Httpclient: There are two warnings about 4.0.1, but otherwise the build is successful.