CODEWITHSUNDEEP
androidfacebooklogout
sof question
sof question

Reputation: 93

How can I logout from Facebook in my custom Android app?

I am building an Android application where I am using Facebook login, and after Facebook login, I get access_token and session that are stored in shared preferences in private mode.

I am using the Facebook login code below in an activity and I want the user to logout from Facebook from another fragment. How do I code on the fragment so that my current logged-in account logs out from Facebook?

Here is my Facebook login code:

/**
 * Function to login into facebook
 */
@SuppressWarnings("deprecation")
public void loginToFacebook() {

    mPrefs = getPreferences(MODE_PRIVATE);
    String access_token = mPrefs.getString("access_token", null);
    long expires = mPrefs.getLong("access_expires", 0);

    if (access_token != null) {
        facebook.setAccessToken(access_token);
        // call getprofileinformation function to get user details
        getProfileInformation();

        Log.d("FB Sessions", "" + facebook.isSessionValid());
    }

    if (expires != 0) {
        facebook.setAccessExpires(expires);
    }

    if (!facebook.isSessionValid()) {
        facebook.authorize(this,
                new String[]{"email", "publish_stream"},
                new Facebook.DialogListener() {

                    @Override
                    public void onCancel() {
                        // Function to handle cancel event
                    }

                    @Override
                    public void onComplete(Bundle values) {
                        // Function to handle complete event
                        // Edit Preferences and update facebook acess_token
                        SharedPreferences.Editor editor = mPrefs.edit();
                        editor.putString("access_token",
                                facebook.getAccessToken());
                        editor.putLong("access_expires",
                                facebook.getAccessExpires());
                        editor.commit();

                        // call getprofileinformation function to get user
                        // details
                        getProfileInformation();

                    }

                    @Override
                    public void onError(DialogError error) {
                        // Function to handle error

                    }

                    @Override
                    public void onFacebookError(FacebookError fberror) {
                        // Function to handle Facebook errors

                    }

                });
    }
}

Upvotes: 0

Views: 500

Answers (3)

T_V
T_V

Reputation: 17580

For 4.x.x version-

LoginManager.getInstance().logOut();

Upvotes: 1

Fahim
Fahim

Reputation: 12358

Call this closeAndClearTokenInformation method to logout from facbook. This method closes the local in-memory Session object and clears any persisted token cache related to the Session.

Upvotes: 0

Nayra Ahmed
Nayra Ahmed

Reputation: 655

Try this :

private static void LogoutFB(Context context) {
    Session session = Session.getActiveSession();
    if (session != null) { 
        if (!session.isClosed()) {
            session.closeAndClearTokenInformation();
            //clear your preferences if saved
        }
    } else { 
        session = new Session(context);
        Session.setActiveSession(session); 
        session.closeAndClearTokenInformation();
            //clear your preferences if saved 
    }

}

Upvotes: 0

Related Questions