get a google-services.json via Firebase setup
follow Firebase instructions to add relevant dependency
add adb to Path in MAC
adb shell setprop debug.firebase.analytics.app com.domain.yourpackage
adb shell setprop debug.firebase.analytics.app .none.
DebugView in Firebase
in China, a VPN is required for the test device.
might as well just use an emulator, showing sdk_gphone64_arm64 as a Debug Device in the Firebase dashboard, after significant delays
Flutter Error: ...FormatException: Unexpected end of input (at character 1)
remove existing androidproject/app/google-services.json