briefcase: Error during briefcase run android, emulator failing to start.

Update: It turns out this was because the Android device was set to “No data transfer”, I changed it to “File transfer / Android Auto” and it worked perfectly!

Aaargh! Sorry - that’s my fault: I copied and pasted something and didn’t check it fully. Try this instead:

import subprocess
print(subprocess.check_output(
    ["c:\users\amogh\.briefcase\tools\android_sdk\platform-tools\adb", "devices", "-l"],
    universal_newlines=True,
    stderr=subprocess.STDOUT,
).strip().split('\n'))