问题
Did anybody try to test android apps on an Android VM I've installed Android VM (9) under VirtualBox (5.2) and Android Studio (4.1) on a Host machine (Windows 10). Followed the network setup steps described at Test android app on Virtual Box from Android studio 5 years ago, and can even connect to the VM from adb (running on the host) in command line, but the studio still cannot see the device.
回答1:
Resolved it It turned out there was a file named .android in the Windows user home folder. Apparently Gradle requires .android folder there and couldn't create it. There were complaints in the Studio log that I shrugged off because they were on INFO log level:) . After I created a .android folder (renamed that .android file and not sure yet what the consequences would be) and synced Gradle the device popped up in the dropdown list. \o/
来源：https://stackoverflow.com/questions/64668078/is-it-possible-to-test-android-app-on-android-vm-under-virtual-box-from-android