Google authentication using Xamarin.Auth

Question

I'm developing an application using Xamarin.Android.

I need to enable login with Facebook and Google and I choose to use the Xamarin.Auth component. I got it work with facebook but I have some issue with Google.

This is my code:

        var auth = new OAuth2Authenticator (
            clientId: "myId.apps.googleusercontent.com",
            clientSecret: "mysecred",
            scope: "openid",
            authorizeUrl: new Uri ("https://accounts.google.com/o/oauth2/auth"),
            redirectUrl: new Uri ("myredirect:oob"),
            accessTokenUrl: new Uri ("https://accounts.google.com/o/oauth2/token"),
            getUsernameAsync: null
        ); 

        activity.StartActivity (auth.GetUI (activity));

        auth.Completed += (sender, e) => {
            Console.WriteLine (e.IsAuthenticated);
        };

Is this way the Google Activity is displayed, and I can insert my Username and password. But when I click the google login button I get a message like this:

google auth please copy this code switch to your application and paste it there [code]

What I have to do with that code? I just need to get the user name/lastname/email/id.

Thanks a lot!

have you got any work around for this problem?

Chethan Shetty
– Chethan Shetty

2014-09-02 11:34:09 +00:00
Commented Sep 2, 2014 at 11:34 — Chethan Shetty
– Chethan Shetty, Commented Sep 2, 2014 at 11:34
@user3471528, did you get the solution for this

user7615935
– user7615935

2017-10-25 19:12:46 +00:00
Commented Oct 25, 2017 at 19:12 — user7615935
– user7615935, Commented Oct 25, 2017 at 19:12

Suchith · Accepted Answer · 2015-08-04 11:08:24Z

3

Bellow steps worked for me.

1.register in google developer console as webapplication instead of installed application(android)* provide the redirect url with valid url ("http://abcd.com/xyz.aspx") same should be used in the application code.

2.on authentication complete it will return access_token

3.by using the access_token make the REST request to get user complete information (https://www.googleapis.com/oauth2/v1/userinfo?access_token=" + accessTokenValue + “.)

4.Deserialize the json response to get information in object.

check the source code :http://appliedcodelog.blogspot.in/2015/08/login-by-google-account-integration-for.html

edited Aug 4, 2015 at 11:08

answered Sep 10, 2014 at 13:17

Suchith

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7 Comments

Ajay Sharma Over a year ago

Hi Suchit, Last 2 day I am trying to use your code to make Google Plus Login in Xamarin Android. But I failed. I have looked your article, Xamarin Form discussion and try each and every thing but still facing issue. Please help.

Ajay Sharma Over a year ago

In step 3: When I try to access user information using access token then 403 error occur in response. JSON like this: "code": 403, "message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup."

Ajay Sharma Over a year ago

I have also tried to make new client Id but it still showing same error

Suchith Over a year ago

Ensure that access token has not been expired.

Ajay Sharma Over a year ago

Today when I tired it shows : code": 401, "message": "Invalid Credentials"

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