After you have installed the Android Things OS on your Raspberry board or Intel Edison, we can configure the WiFi connection. This can be done using the adb shell. Open a terminal window or a command prompt and write the following:
adb shell am startservice
-n com.google.wifisetup/.WifiSetupService
-a WifiSetupService.Connect
-e ssid <Your_WIFI_SSID>
-e passphrase <WIFI_password>
Where Your_WIFI_SSID is the ID of your WIFI and WIFI_password is the password you use to connect to your WiFi.