Facebook api with Xamarin - facebook

Question

I am creating an application by Xamarin (andoroid / iOS) and would log in using facebook, and I do so by sharing the same access code?

Answer 1

You can do it by following the code sample I've published here: https://github.com/IdoTene/XamarinFormsNativeFacebook
a guide of how to do so:
Steps to set up your project:
Installation:
1) For Android download from nuget/Components the Facebook Android SDK: http://components.xamarin.com/view/facebookandroid and place it in your droid project.
2) For iOS download from nuget/Components the Facebook iOS SDK: http://components.xamarin.com/view/facebookios and place it in your iOS project.
Set up components:
Shared code set up:
1) Add a FacebookLoginButton which inherits from Button, leave it without any implementation
2) Add that button to the login page
3)Add to App.cs the following property:
public static Action<string> PostSuccessFacebookAction { get; set; }
4) in the LoginPage.xaml.cs (or in the viewmodel class if you have one), add the navigation for this action:
App.PostSuccessFacebookAction = async token =>
{
//you can use this token to authenticate to the server here
//call your FacebookLoginService.LoginToServer(token)
//I'll just navigate to a screen that displays the token:
await Navigation.PushAsync(new DiplayTokenPage(token));
};
Android: 1) Add to strings.xml file (found at Resources/Valus) The following lines {Your App Id Here} {Your App Name}
2) Add to Manifest.xml the following code:
3) Create activity class for facebook (I called it FacebookActivity)
4) Create a custom rendrer for the facebook Login button (I called it FacebookLoginButtonRendererAndroid)
5) Add to mainActivity class The OnActionResult method to handle response from the FacebookActivity
iPhone:
1) In AppDelegate class, register in method FinishedLaunching the following:
FBSettings.DefaultAppID = FacebookAppId;
FBSettings.DefaultDisplayName = FacebookAppName;
2) Override the following methods:
public override bool OpenUrl(UIApplication application, NSUrl url, string sourceApplication, NSObject annotation)
{
base.OpenUrl(application, url, sourceApplication, annotation);
return FBSession.ActiveSession.HandleOpenURL(url);
}
public override void OnActivated(UIApplication application)
{
base.OnActivated(application);
// We need to properly handle activation of the application with regards to SSO
// (e.g., returning from iOS 6.0 authorization dialog or from fast app switching).
FBSession.ActiveSession.HandleDidBecomeActive();
}
3) Create a custom rendrer for the facebook Login button (I called it FacebookLoginButtonRendererIos)