is the gateway and odata calls are set up correctly and system alias configured ?
Please check if there are any errors in gateway or odata.
You can refer here as an example
http://scn.sap.com/community/mobile/blog/2014/06/10/fiori-technical-installation-and-configuration-of-one-app-from-a--zhttp://scn.sap.com/docs/DOC-48863
