adb devices

adb shell ping 8.8.8.8

adb shell ping google.com ->
ping: unknown host google.com

Solved: https://medium.com/@daydreamer_/how-to-fix-android-emulator-wi-fi-connected-with-no-internet-c62fd4ed652d

macOS

DNS settings are specified in the Network window.

1. Click Apple menu > System Preferences > Network.
2. Click Select Connected Wifi > Details
3. Select the DNS tab.
4. Add 8.8.8.8 and 8.8.4.4
5. Click OK > Apply.
6. Restart AVDs.

adb shell curl http://google.com

Run:

adb shell

If this works, you’ll enter a shell on the device. Now try:

 ping google.com

adb kill-server
adb start-server
adb devices