LoginButton from Facebook SDK is null


LoginButton from Facebook SDK is null



I'm using FB SDK and LoginButton is null even if the UI shows it right.



JAVA:


loginButton = findViewById(R.id.login_button);



XML:


<com.facebook.login.widget.LoginButton
android:id="@+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dp"
android:layout_marginBottom="30dp"/>



GRADLE:


compile 'com.facebook.android:facebook-login:4.34.0'





Can you check that the layout you've set in the setContentView() is the one with the button? I often make this mistake.
– Sanchita Santra
Jun 30 at 10:51





This was the problem. The button was inside of one nav_header. To access the object i used navigationView.getHeaderView(0).findViewById.
– thmmy95
Jun 30 at 12:16


navigationView.getHeaderView(0).findViewById




1 Answer
1



Try this code.. and i hope you add internet permission and other things into android manifest files..


/**
* this method used to user login with facebook.
*/
private void loginWithFacebook() {

mLoginFbButton.setReadPermissions("public_profile", "email");
mLoginFbButton.setFragment(this);
mLoginFbButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
// App code
if (Profile.getCurrentProfile() == null) {
mProfileTracker = new ProfileTracker() {
@Override
protected void onCurrentProfileChanged(Profile profile, Profile profile2) {
registerUsingFaceBook(profile2);
}
};
} else {
registerUsingFaceBook(Profile.getCurrentProfile());
}

}

@Override
public void onCancel() {

}

@Override
public void onError(FacebookException exception) {
}
});
}



more information refer this link..
https://github.com/facebook/facebook-android-sdk





The internet permission is already set up. I've done what you suggesting, but this doesn't have any connection with my problem. If i do this, it will throw Attempt to invoke virtual method 'void com.facebook.login.widget.LoginButton.setReadPermissions(java.lang.String)' on a null object reference
– thmmy95
Jun 30 at 6:10


Attempt to invoke virtual method 'void com.facebook.login.widget.LoginButton.setReadPermissions(java.lang.String)' on a null object reference





this permission add into fb devloper option.
– Android Team
Jun 30 at 6:11





I need to say the button works as expected. (It make connection to my fb acount) Only problem is that i can't receive the object reference in java...
– thmmy95
Jun 30 at 6:13






it means not getting user profile data.
– Android Team
Jun 30 at 6:19





Could you explain what do you mean? I don't understand and i'm still trying to figure out what is the problem(in FB analytics it appears that i've connected with app but no java object refernce available)
– thmmy95
Jun 30 at 7:31






By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Comments

Post a Comment

Popular posts from this blog

paramiko-expect timeout is happening after executing the command

paramiko-expect timeout is happening after executing the command Can someone help me why timeout is happening after executing the command .I am trying to SSH to a machine and execute a command.I want to store the result of the executed command . I have referred paramiko-timeout but i didn't get my expected result. import traceback try: import paramiko except ImportError: raise Exception("Please install paramiko , pip install paramiko") import pexpect from paramiko_expect import SSHClientInteraction def main(): HOSTNAME = "minion5.net" USERNAME = "root" PASSWORD = "help@432" PROMPT = "root@*:~$s+" try: client = paramiko.SSHClient() client.load_system_host_keys() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) client.connect(hostname=HOSTNAME, username=USERNAME, password=PASSWORD) with SSHClientInteraction(client, timeout=20, display=True) as interact:
Read more

how to run turtle graphics in Colaboratory

how to run turtle graphics in Colaboratory Given that we can do other types of drawing/visualization in Colaboratory, I would think running turtle graphics would be pretty simple (but not so simple I've figured it out!) I can import the turtle library, but I get the following error when any draw command occurs: TclError: no display name and no $DISPLAY environment variable Thanks in advance. 1 Answer 1 I think P5.js is your best bet. I test it in this notebook. https://colab.research.google.com/drive/1TqF6RObllyslad3KrO4SiAuegRjuJDCF By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.
Read more

Export result set on Dbeaver to CSV

Export result set on Dbeaver to CSV Normally I use Dbeaver for windows and always export my result set like this: run my query --> select the result --> export the result set --> select export to clipboard --> done This step by step puts my result set in my clipboard and I can paste it wherever I want to work with it. The problem is that now I am using dbeaver for mac and this guide is not working. I can go on until the moment that I select my result set like in the image below: exporting data set But once I go further in the process, in the last step I get: no query Note that in "source" it was suppose to show the query that originated the result set, but instead it says just "select. As a result it does't select my result or anything (besides being "successful"). Normally my query would show up there automatically and I couldn't find any option that corrects this problem in the menus. Please help me! Thanks. Aft
Read more