问题
I'm on a mac and I updated Android Studio to the latest available version (3.6.1) and now it can't seem to connect to any emulator. I started a new Hello World project and tried building and running it. It opens the emulator but the app never runs. Logcat displays "no connected devices".
I re-installed SDK platform tools and made sure adb was running. Killed and restarted the adb service several times. Tried a different AVD. Tried uninstalling and reinstalling Android Studio. I even tried rolling back to Android Studio 3.5. Logcat continues to show "no connected devices" and emulator opens but does nothing.
Not getting any helpful error messages so I don't know what else to do?
回答1:
The last update has relocated adb and other tools from ~/Library/Android/sdk/platform-tools/ to ~/Library/Android/sdk/platform-tools/platform-tools/.
Move (or copy) files from .../platform-tools/platform-tools/ to .../platform-tools.
来源：https://stackoverflow.com/questions/60871480/android-studio-not-communicating-with-emulator