Your app can request additional scopes any time after the initial scopes have been granted. In this case, only those additional scopes will appear in the user's consent screen. Your app should request all previously granted scopes with these additional scopes to ensure your app proceeds with all the access it expects.
To request additional scopes, you disconnect the previous
then connect a new
GoogleApiClient with the expanded set of scopes.
You will receive an
onConnectionFailed callback with a
that can be resolved as before to show a consent dialog requesting the
additional permissions that your app has not already been granted.
You might use this technique if you suspect users are avoiding sign-in because your consent screen is overwhelming new users, or if you think users are confused why they are being asked for certain permissions. In either case, you can delay the additional scopes and present them just before they are needed.