Not Logged In Issue

[huxaiphaer]

I implemented everything in your video but when i press the butto says the following:
"Not Logged In. you are not logged in. please login and try again"

Below is my code :

using System;
using System.Collections.Generic;
using diabetics_app.ViewModels;
using Xamarin.Forms;

namespace diabetics_app.Main
{
    public partial class FacebookProfilePage : ContentPage
    {
		/// <summary>
		/// Make sure to get a new ClientId from:
		/// https://developers.facebook.com/apps/
		/// </summary>
		private string ClientId = "134161603894277";
       // 134161603894277
		public FacebookProfilePage()
		{
			InitializeComponent();

			var apiRequest =
				"https://www.facebook.com/v2.10/dialog/oauth?client_id="
				+ ClientId
				+ "&display=popup&response_type=token&redirect_uri=http://www.facebook.com/connect/login_success.html";

			var webView = new WebView
			{
				Source = apiRequest,
				HeightRequest = 1
			};

			webView.Navigated += WebViewOnNavigated;

			Content = webView;
		}

		private async void WebViewOnNavigated(object sender, WebNavigatedEventArgs e)
		{

			var accessToken = ExtractAccessTokenFromUrl(e.Url);

			if (accessToken != "")
			{
				var vm = BindingContext as FacebookViewModel;

				await vm.SetFacebookUserProfileAsync(accessToken);

				Content = MainStackLayout;
			}
		}

		private string ExtractAccessTokenFromUrl(string url)
		{
			if (url.Contains("access_token") && url.Contains("&expires_in="))
			{
				var at = url.Replace("https://www.facebook.com/connect/login_success.html#access_token=", "");

				if (Device.OS == TargetPlatform.WinPhone || Device.OS == TargetPlatform.Windows)
				{
					at = url.Replace("http://www.facebook.com/connect/login_success.html#access_token=", "");
				}

				var accessToken = at.Remove(at.IndexOf("&expires_in="));

				return accessToken;
			}

			return string.Empty;
		}
	}

}

[LordDz]

I had trouble with this as well.

In the developer page for your app, go to Facebook Login->Settings.
In the Valid OAuth redirect URIs textbox, add http://www.facebook.com/connect/login_success.html

I made the mistake of using https:// It doens't work, make sure it's http://

[TranThiHang]

LordDz....I also have same trouble, but I changed the Valid OAuth redirect URIs to http://www.facebook.com/connect/login_success.html and not successfully because that URL is not allowed so I can't change...What have I to do now? help me...