问题
Google plus signin is not working after publishing app on play store. It works fine on my debugging mobile device. How to solve it?
回答1:
you doesn't attach your SHA-1 certificate fingerprint on "Google Developer Consol" at OAuth 2.0 client IDs .So go on Google developer Consol first and add your SHA-1 fingerprint in both API KEY and OAuth 2.0 client IDs. Perhaps you have added fingerprint in API KEY but not in OAuth 2.0 client IDs.
So follow below path:
1 ): Open your Google developer consol.
2 ): Go on side menu bar and click to API MANAGER.
3 ): Click on Credentials.
4 ): Now Click on Create Credentials.
5 ): Select to OAuth Client ID and your release SHA-1 fingerprint.
来源：https://stackoverflow.com/questions/36014812/how-to-solve-android-google-signing-issue-which-is-not-working-after-publishing