Xamarin.Auth與Twitter

Question

我想實現與Facebook和Twitter的登錄。我與Facebook合作，但不知道如何用Twitter做到這一點。有沒有例子？我的Facebook的實現是這樣的：

var auth = new OAuth2Authenticator(
    clientId: "*****************", 
    scope: "email", 
    authorizeUrl: new System.Uri("https://m.facebook.com/dialog/oauth/"), 
    redirectUrl: new System.Uri("http://www.facebook.com/connect/login_success.html")); 

StartActivity(auth.GetUI(this)); 

auth.Completed += (senderFb, eventArgs) => 
{ 
    if (eventArgs.IsAuthenticated) 
    { 
     AccountStore.Create(this).Save(eventArgs.Account, "Facebook"); 

     // Now that we're logged in, make a OAuth2 request to get the user's info. 
     var request = new OAuth2Request("GET", new System.Uri("https://graph.facebook.com/me"), null, eventArgs.Account); 

     request.GetResponseAsync().ContinueWith(t => 
     { 
      if (!t.IsFaulted && !t.IsCanceled) 
      { 
       var obj = JsonValue.Parse(t.Result.GetResponseText()); 
       if (obj != null) 
       { 
        var user = new UserProfile 
         { 
          FirstName = obj["first_name"], 
          LastName = obj["last_name"], 
          FacebookProfileLink = obj["link"], 
          FacebookToken = eventArgs.Account.Properties["access_token"], 
          Gender = obj["gender"] == "female" ? "Female" : "Male", 
          EmailAddress = obj["email"], 
          DisplayName = obj["name"], 
          Name = obj["name"], 
          LoginName = obj["email"] 
         }; 
        SignUpUser(user); 
       } 
      } 
     }, uiScheduler); 
    } 
}; 

Answer 1

你可以像這樣使用oauth1。

this.Authenticator = new OAuth1Authenticator (ConsumerKey, ConsumerSecret, RequestTokenUrl, AuthorizeUrl, AccessTokenUrl, DummyCallBackUrl, (IDictionary<string, string> accountProperties) => { 
    string screen_name = ""; 
    if (accountProperties.TryGetValue("screen_name", out screen_name)) { 
     Account a = new Account(screen_name, accountProperties); 
     AuthenticatorCompletedEventArgs e = new AuthenticatorCompletedEventArgs(a); 
     CompleteAuthentication(e); 
    } 
    return null; 
}); 

Twitter的API這麼想的完全支持的OAuth2