Hi Aderito,
I hope you are referring to the same guide at Compile and run a native Android app on SAP HANA Cloud Platform | SAP .
Also please check if you are using the right server details to connect.
Server Name: (replace p194XXXX with your P-user or SUser id )
https://hcpms-p194XXXXXtrial.hanatrial.ondemand.com/
and use the credentials of SCN Account.
Simple test is check the connectivity is to load the server url as above in the browser of AVD and login via the same credentials. - It must work here .
On successful login a page like below would be rendered
Regards
Virinchy