Oauth2/Xamarin-谷歌显示其主页

我试图通过谷歌获取用户的姓名和邮箱地址。但在用户登录后，Google会打开Google Hompe页面，不会向应用程序返回任何内容

为什么会发生这种情况？我该如何解决

using Xamarin.Auth;

namespace test.Services
{
    public class AuthenticationState
    {
    public static OAuth2Authenticator Authenticator;
}

public static class AuthConstants
{
    public static string AppName = "test";


    public static string GoogleClientId          = @"396035829574-7qh2vrbindbm.....apps.googleusercontent.com";
    public static string GoogleClientSecret   = @"r8lqPTr5D....";
    public static string GoogleAuthorizeUrl   = @"https://accounts.google.com/o/oauth2/auth";
    //public static string GoogleAccessTokenUrl = @"https://accounts.google.com/o/oauth2/token";
    public static string GoogleAccessTokenUrl = @"https://www.googleapis.com/oauth2/v4/token";

    public static string GoogleAndroidRedirectUrl = @"com.googleusercontent.apps.396035829574-7qh2vrbin..:/oauth2redirect";

    public static string GoogleScope = @"https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile";
    //public static string GoogleScope = @"email";
    }
}

---

---

authPresenter.Completed+=（发件人，参数）=>{
var请求=新的OAuth2Request（“GET”），新的Uri（“https://www.googleapis.com/oauth2/v2/userinfo），空，参数帐户）；
任务googleResponse=request.GetResponseAsync（）；
googleResponse.Wait（）；
var googleUser=JsonValue.Parse（googleResponse.Result.GetResponseText（））；
userInfo.Add（“用户名”，谷歌用户[“电子邮件]）；
userInfo.Add（“密码”，googleUser[“id]”）；
};

是否创建一个活动，然后添加

IntentFilter

如本文所述，请参阅

GoogleAuthInterceptor.cs

我测试您的

已完成

，我可以获取信息。下面是跑步截图。

auth = new OAuth2Authenticator(AuthConstants.GoogleClientId,
                                            string.Empty,
                                            AuthConstants.GoogleScope,
                                            new Uri(AuthConstants.GoogleAuthorizeUrl),
                                            new Uri(AuthConstants.GoogleAndroidRedirectUrl),
                                            new Uri(AuthConstants.GoogleAccessTokenUrl),
                                            null,

                                    true);

authPresenter.Completed += (sender, args) => {
    var request = new OAuth2Request("GET", new Uri("https://www.googleapis.com/oauth2/v2/userinfo"), null, args.Account);
    Task<Response> googleResponse = request.GetResponseAsync();
    googleResponse.Wait();
    var googleUser = JsonValue.Parse(googleResponse.Result.GetResponseText());
    userInfo.Add("username", googleUser["email"]);
    userInfo.Add("password", googleUser["id"]);
};