I have started using the Google+ API
for android, and I have created a sign-in application following this tutorial:
https://developers.google.com/+/mobi
Once you click logout from another activity,try send an intent with extra to indicate that logout button is clicked. Then on Login Activity
if (Intent.Extras != null && Intent.Extras.ContainsKey("LogoutAction")) {
_logoutRequest = Intent.Extras.GetBoolean("LogoutAction");
}
if (_logoutRequest) {
await PlusClass.AccountApi.RevokeAccessAndDisconnect(_apiClient);
_apiClient.Disconnect();
_apiClient.Connect ();
_logoutRequest = false;
}
Other Activity
var intent = new Intent(this.Activity,typeof(LoginActivity));
intent.PutExtra("LogoutAction",true);