This worked for me as this post try: Update 2
https://stackoverflow.com/a/42735118/5133603
Update 2:
Solution to emulator package issue!
After digging in the repo’s XML for a while I’ve spotted the issue.
It turns out that the “emulator” package is only in channel 3 (canary) while the “tools” package is in channel 0 (stable) but depends on “emulator”. The solution is to force the manager to download the “emulator” package from channel 3:
./sdkmanager --channel=3 emulator
Problem solved!