Force Android to Use Wifi network with no internet

Question

I am building an android app that needs to communicate over a WiFi network that will not have any internet access. The problem is that even when the WiFi is connected androi

Answer 1

you'd need to disable mobile data in the Settings (not certain, if this can be done programmatically, which might be a possible option) - or take out the USIM;

else the common behavior is, that it will always fall back to the best available connection (while a connection with internet gateway might be preferred, because it is used by most application).

also see this answer.