the only way you can create a styles
xml file, is inside a values
folder, so you can't assemble all the styles
files inside one folder, android will not recognize it, thus, not allowing what you are trying to do
here is a link to follow when creating a folder,
http://developer.android.com/guide/topics/resources/providing-resources.html
check this part within Table 1. Resource directories supported inside project res/ directory.