ANDROID9 how can enable multiple networks

[mario sangalli]

Hello Team, I'm working on embedded android system (9).

No much experience with Android, only with linux :-)

I' ve Ethernet , 4G and WiFi connections and I've to use them all at  same time,

using 4G as preferred network.

While Ethernet and 4G can operate at same time , wiFi is not available.

Changing teardownUnneededNetwork() in ConnectivityService.java do not

seems to work as expected....

Also, there is a way to force 4G to be the preferred (internet) media?

currently Ethernet seems to be the preferred media but I want to use

Eth as a LAN , not as a WAN

Thanks

Mario

[blheal...@gmail.com]

Have you tried Android Developer Settings, allow "Mobile data always active"

I am not sure about your specific question, though I am not sure if you need to change anything in android to get this functionality. 
In Android 9, I have noticed that if I have a static IP data SIM, I can access the LTE network IP even when Wi-Fi is on and connected. 

On our device we have SSH and VNC, so we can use that public Static IP to see the device even though it was on Wi-Fi, the 4G network was running as well. I don't know how relevant it is for your use case, but this is all I know!

[Khin San Ohn]

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