问题
I Google more then 4 hour but not getting the solution. I register my app pkg and hash key in app console. I am using sample provided by Google developers. But what happening I don't know.
not able to post and image due to less reputation
Sorry for my English.
回答1:
Make sure you have added your package name and key SHA1 at
Google Cloud Console → Your Project → API & auth → Credentials via “Create New Client ID” at “OAuth” section.
I got the same result as you described when added information via “Create New Key” at “Public API access” section.
The procedure is described at documentation steps 7 and 8.
回答2:
If you sure package name and key SHA1 is ok, check CLIENT. May not have all the services are enabled but you use CLIENT_ALL.
CLIENT_ALL=
gameHelper = new GameHelper(gameActivity, GameHelper.CLIENT_GAMES | GameHelper.CLIENT_PLUS
| GameHelper.CLIENT_APPSTATE | GameHelper.CLIENT_SNAPSHOT);
Use same CLIENT_APPSTATE:
gameHelper = new GameHelper(gameActivity,CLIENT_APPSTATE);
Little by little add CLIENT and check which one CLIENT cause dialog.
回答3:
In the developer's console, make sure that your project's consent screen 'email address' and 'product name' fields are set. I was getting this error until I provided valid values for these fields.
回答4:
In my case, I was using SHA key of my release version instead of build version's SHA key.
来源：https://stackoverflow.com/questions/21403454/dialog-unknown-issue-in-google-play-services-when-try-to-use-google-drive-sample