Android Google SignIn not working in debug mode: GoogleSignInResult is false

Question

I have been following this tutorial to get Google SignOn going: https://developers.google.com/identity/sign-in/android/start-integrating

When I run my application lo

Answer 1

Reason for the can be: - You might be using an unsigned apk to test you app.

Go to Build->Generate Signed APK -> sign it with the key you used to get your SHA1 Fingerprint to make clientID on google developer console

Run app-debug.apk and its done!!