You should check about SAP HANA Cloud Platform Mobile Services (HCPms) , its available now, you can subscribe it and start develop mobile apps. How to enable HANA Cloud Platform Mobile Services Trial
You can find more info from official documentation: SAP HANA Cloud Platform Mobile Services
For developing UI5/Fiori based apps, SAP has released browser based IDE called as SAP Web IDE. SAP Web IDE Developer Guide It lets you to develop, design,build and deploy Fiori like apps on SAPUI5.
Now, you can develop hybrid apps (based on cordova framework) using the Web IDE.You are free to add any cordova plugins as per your requirement to access device's native functionality. SAP Web IDE, Hybrid App Toolkit Add-on enables developers to create and deploy hybrid apps (also known as Cordova or Kapsel apps) using Apache Cordova and the SAP Mobile Platform SDK.
Check few latest blogs:
Develop Hybrid App with Camera using SAP Web IDE
SAP Web IDE Hybrid App Toolkit Add-on
Regards,
JK