Google Sign In error 12500

Solution 1:

Error PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null)

This 12500 Error can be solved by adding a support email address to your project in project settings. Open link https://console.firebase.google.com/

Select Your project and open settings tab.

Provide a valid support email and restart your application now.

Solution 2:

Check if SHA-1 fingerprints are added to the firebase project settings. If not,find SHA-1 fingerprint using

https://developers.google.com/android/guides/client-auth

Also, find the SHA-1 fingerprint of release key using

keytool -list -v -keystore <keystore path>

Remove <keystore path> with the path of the key store.

Then add both SHA-1 fingerprints to firebase projects settings.

NB: Don't forget to replace google-services.json with updated google-services.json with new fingerprints. I lost two days on that.

While debug

Android studio automatically generate ~/.android/debug.keystore on first debug build and use it to sign the app.

To get the SHA-1 run (password android) (doc):

keytool -exportcert -list -v -alias androiddebugkey -keystore ~/.android/debug.keystore

This SHA-1 should be added to the app settings at firebase to allow usage of google sign in capabilities while testing debug build.