Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.facebook.Profile.getFirstName()'

Question

I am trying to fetch some data on my android validation using Facebook API. I am able to login into my facebook account. This is the permission I have set to fetch data from Facebook account

loginButton.setReadPermissions(Arrays.asList( "public_profile", "email", "user_birthday", "user_friends"));

using the above permissions I am trying to fetch profile name and other data I am getting a null pointer exception with the below code snippet

public void getFacebookData(AccessToken accessToken, Profile profile) {
        System.out.println("---------------------");
        System.out.println("--Facebook Login Successful!");
        System.out.println("--Logged in user Details : ");
        System.out.println("---------------------");
        System.out.println("--User ID : " + accessToken.getUserId());
        System.out.println("--Authentication Token : " + accessToken.getToken());
        System.out.println("---------------------");
        System.out.println("--First Name : " + profile.getFirstName());
        System.out.println("--Last Name : " + profile.getLastName());
        System.out.println("--URL Perfil: " + profile.getLinkUri());
        System.out.println("--URL Imagem: " + profile.getProfilePictureUri(500, 500));
        System.out.println("---------------------");
        System.out.println("--ID : " + profile.getId());
        System.out.println("--Name : " + profile.getName());
        System.out.println("---------------------");

        TextView profile_name = (TextView)findViewById(R.id.profile);
        profile_name.setText(profile.getName());

Please, what be wrong with the approach I am using.

Obviously, **profile** is **null**. – GhostCat Jul 19 '17 at 12:21 — GhostCat, Jul 19 '17 at 12:21

score 0 · Accepted Answer · edited Jul 19 '17 at 12:28

NullPointerException is thrown when an application attempts to use an object reference that has the null value .

getCurrentProfile()

Getter for the profile that is currently logged in to the application.

public void getFacebookData(AccessToken accessToken, Profile profile) {
    System.out.println("---------------------");
    profile = Profile.getCurrentProfile(); // Add this 
   if (profile != null) 
   {
    System.out.println("--First Name : " + profile.getFirstName());
    System.out.println("--Last Name : " + profile.getLastName());
    System.out.println("--URL Perfil: " + profile.getLinkUri());
    System.out.println("--URL Imagem: " + profile.getProfilePictureUri(500, 500));
    System.out.println("---------------------");
    System.out.println("--ID : " + profile.getId());
    System.out.println("--Name : " + profile.getName());
    System.out.println("---------------------");

   }

profile still returns null does this has to do with the account I am using — blend, Jul 19 '17 at 12:32

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.facebook.Profile.getFirstName()'

1 Answers1