Unity Android Unable to login into Facebook after first try

Question

I got the facebook to work in Unity with android but after the first time i log in it doesn't work anymore. I think it's because i don't log out but i don't know why it doesn't stay logged in either so i can use the API. Here is my code :

public class FacebookLogin : MonoBehaviour {


void Awake()
{
    if (!FB.IsInitialized)
    {
        FB.Init(InitCallback, OnHideUnity);
    }
    else
    {
        FB.ActivateApp();
    }
}

private void InitCallback()
{
    if (FB.IsInitialized)
    {
        FB.ActivateApp();
    }
    else
    {
        Debug.Log("Failed to Initialize the Facebook SDK");
    }
}

private void OnHideUnity(bool isGameShown)
{
    if (!isGameShown)
    {
        Time.timeScale = 0;
    }
    else
    {
        Time.timeScale = 1;
    }
}

public void FBLogin()
{
    List<string> perms = new List<string>() { "public_profile", "email", "user_friends" };
    FB.LogInWithReadPermissions(perms, AuthCallback);
}

private void AuthCallback(ILoginResult result)
{
    if (FB.IsLoggedIn)
    {
        var aToken = Facebook.Unity.AccessToken.CurrentAccessToken;

        FB.API("/me?fields=first_name", HttpMethod.GET, getName);
        FB.API("/me/picture?type=square&height=128&width=128", HttpMethod.GET, getProfilePic);
        SceneManager.LoadScene("Main_Menu");
    }
    else
    {
        Debug.Log("User cancelled login");
    }
}

private void getName(IResult result)
{
    LocalDataBase.Name = result.ResultDictionary["first_name"].ToString();
}

private void getProfilePic(IGraphResult result)
{
    LocalDataBase.profilePicture = result;
}

}

Can someone please explain to me how do i save the login token or does it save automatically?

Answer 1

There is no need to save the FB token. Whenever you want to use it, you can get it from these lines of code:

string token = null;
if (FB.IsLoggedIn)
{
    token = Facebook.Unity.AccessToken.CurrentAccessToken;
}
//... use the token here onwards...