Firebase：Google OAuth2登录失败

Question

I have just released app in play store, but there is problem in google signin. If i directaly insall signed apk then google login work perfactly. but when i download app from play store google login doesnt work. It gives me below error.

E/TokenRequestor: You have wrong OAuth2 related configurations, 
please check. Detailed error: UNREGISTERED_ON_API_CONSOLE

I already added debug and release sha1 to firebase console. Please let me know if i missed anything.

Answer 1

Seems to be a configuration issue with Firebase, Google API console and your google-services.json file.

You need to know that the release APK and debug APK have different SHA1 and different API keys for Google Services. So you need to add both of them in inside Firebase Project Setting.

After adding both you need to redownload the google-services.json file and put it in the right place of your project. Create a fresh release build with your keystore and publish you app once again in Google Play Store.

Should work.

Answer 2

This issue with the wrong (not added) SHA1 in google-services.json

To solve this you need to add SHA1 for publish apk as well in firebase console project.

1. generate SHA1 for debug

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

2. generate SHA1 for release

   keytool -exportcert -list -v -alias your-key-name -keystore path-to-production-keystore

3. Add SHA1 for publish apk

   I went to my Release Management tab , then scrolled down to App Signing , and found the SHA-1 there.

After adding all these SHA-1 in firebase console. you need to again download google-services.json and put in android project. generate signed apk again and publish it. It will works.