Google Play Game Services sign in button spits "Unknown error"

Question

I'm trying to use Google Play Game Services in my practice Android app.

I got the sign in buttons UI as explained in the developer guide. When I hit the sign in for the first time, it guides me through sign in process. Right after it's about to finish the process, it gives me a dialog with "Unknown error". After the first time, it always gives me this dialog after displaying the loading animation for a bit.

I imported BaseGameUtils and google-play-services_lib. I attached reference from BaseGameUtils to the google-play-services_lib. Then attached reference of these 2 to my game project.

I exported the project to get the SHA1 to put in the developer console. Then I have my 12 digit app id to place on the values/ids.xml (got the meta tag under application).

Tried cleaning the project, redoing the SHA1/keystore process and no luck. My email is under the testing access.

I read and tried the solutions provided on this question, but it was not my case.

Google Play Game Services - unable to sign in

Anybody experiencing the same or does anyone have a solution I should try?

Answer 1

Try going to your Google+ settings on your device and purging the access that you had granted the app. Afterwards, MANUALLY set up Google+ for your test account, either through a PC/Mac web browser or through your device, then try re-linking the app. This worked for me.

Exact steps for Samsung Galaxy S3:

Settings -> Google -> Google+ -> Apps with Google+ Sign-In -> tap the app and at the bottom, tap Disconnect App.

For what it’s worth, I also tapped the option to “Delete all activity for this app” as well when I deleted it.

Answer 2

Your ids.xml has to look like:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_id">XXXXXXXXX</string>
</resources>

And, in your manifest, you have to add:

    <meta-data android:name="com.google.android.gms.games.APP_ID"
    android:value="@string/app_id" />

Good luck!