Hello, Is there any way i can add and/or delete devices and data to my portals from API in my android device??
Yes there is. The Portals API has a ‘create device’ method that you can use just like creating a device in portals, see the docs for it here: http://docs.exosite.com/portals/#create-device
Also, we have an example android application that uses the Portals API to help get you started here: https://github.com/exosite-garage/AndroidPortals