Only use material theme if using API 21 or newer
Only use material theme if using API 21 or newer

hboon/RubyMotion,katsuyoshi/RubyMotion,HipByte/RubyMotion,hboon/RubyMotion,hboon/RubyMotion,katsuyoshi/RubyMotion,katsuyoshi/RubyMotion,katsuyoshi/RubyMotion,HipByte/RubyMotion,HipByte/RubyMotion