B4A Library Facebook

NJDude · Apr 15, 2014

This library will allow your apps to interact with Facebook.

Requirements:

1- B4A 3.x

2- Facebook account.

3- Copy the Facebook.xml and Facebook.jar to your additional libraries directory.

Usage:

B4X:

'Initialize the library
Dim FB As Facebook

'Get the following 3 fields from Facebook after creating a Facebook app.
Dim AppID As String = "<APP_ID_FROM_FACEBOOK>"
Dim AppSecret As String = "<APP_SECRET_FROM_FACEBOOK>"
Dim myWebsite As String = "<LINK_TO_THE_WEBSITE_IN_REDIRECT_URI>"

FB.Initialize(Activity, Me, "myFB", AppID, AppSecret, myWebsite)

'Login to Facebook
FB.Login

'Get your profile
FB.GetMyProfile

...

'Display profile fields
Sub myFB_MyProfile_Response(Profile As Map)

    Dim Temp As String

    For I = 0 To Profile.Size - 1

        Temp = Temp & Profile.GetKeyAt(I) & ": " & Profile.GetValueAt(I) & CRLF

    Next

    Msgbox(Temp, "My Profile")


End Sub

The attached files contain:

a- The Facebook library.

b- "How to create a Facebook app" quick guide.

c- A sample project.

NOTES: You have to have some basic knowledge of the Facebook API to use it, especially about permissions, the library allows you to interact with Facebook but you are responsible to add/remove the necessary permissions for the actions you want to perform.

You have to create a Facebook app before you can use the library, the instructions are in the quick guide mentioned on item "b" above.

A DEMO app (apk) is also attached for you to take a look at the library's functionality.

Library recompiled on May 28, 2017 (B4A 6.8+)

Mashiane · Feb 17, 2015

Thanks NJDude, lesson learned, to use the GetFields method, use LoginWithPermissions. May the force be with you...

NJDude · Feb 17, 2015

Mashiane said:
Thanks NJDude, lesson learned, to use the GetFields method, use LoginWithPermissions. May the force be with you...

leitor79 · Mar 9, 2015

Hi, Again!

I've been not usint this for a while, and now I'm resuming development.

I want to read a list of friends (those who use the app), and then make a list with name-picture.

I seem to get the list correctly (with FB.CustomRequest("GET", "/me/friends?","friends")), and get the corresponding JSON.

As I haven't implemented the parser yet, I'm trying to get each user information manually (just to check the commands). So, I'm using:

FB.GetFields("1398757477105705",TheFields)
FB.GetFields("1395063697475371",TheFields)
FB.GetFields("1387538914896191",TheFields)

The issue is that the Sub myFB_GetFields_Response(JSONText As String) appears to be executed only once, only for the first request. I get the correct data for the first call, and the Response is never triggered for the second or the third. I think that maybe the requests are triggered to fast... could it be? which would be the correct approach to read the profiles of an array of users? What would you recommend?

Thank you!

NJDude · Mar 9, 2015

It might possible that FB is blocking fast consecutive calls to prevent flooding/spam, but that's just my guess. You will have to develop a way to send requests after the previous one has completed.

Douglas Farias · Mar 16, 2015

Why this? the example get diferent facebook id my real is
100000606767838

leitor79 · Mar 25, 2015

Douglas Farias said:
Why this? the example get diferent facebook id my real is
100000606767838

maybe you have 2 accounts, one for android development?

leitor79 · Mar 25, 2015

Hi,

I'm getting some profile info, but now I want to add the birthday from the info I'm getting but I'm not receiving it. On Activity_create I have this:

B4X:

    TheFields.Initialize
    ThePermissions.Initialize
   
    ThePermissions.Add(FB.PERMISSION_USER_FRIENDS)
    ThePermissions.Add(FB.PERMISSION_USER_HOMETOWN)
    ThePermissions.Add(FB.PERMISSION_USER_LOCATION)
    ThePermissions.Add(FB.PERMISSION_FRIENDS_PHOTOS)
    ThePermissions.Add(FB.PERMISSION_USER_PHOTOS)
    ThePermissions.Add(FB.PERMISSION_USER_BIRTHDAY)
    FB.Initialize(Activity,Me, "myFB", AppID, AppSecret, myWebsite )
    FB.LoginWithPermissions(ThePermissions)

    TheFields.AddAll(Array As String(FB.USER_FIELD_ID, FB.USER_FIELD_NAME, FB.USER_FIELD_GENDER,FB.USER_FIELD_LOCATION,FB.USER_FIELD_HOMETOWN,FB.USER_FIELD_BIRTHDAY,FB.USER_FIELD_PICTURE,FB.USER_FIELD_LOCALE))

on myprofile_response, I get the map with the profile info but the birthday is not there...

The question is; do I need to do some reset after adding the new permission? I've logged out, re-logged in (no password is asked, just the facebook's confirm permission window). Am I doing something wrong?

Thank you very much!

PS: I've tried deleting app cache & data, and logging with another fb account (a real one), with same results.

NJDude · Mar 25, 2015

If the user is not allowing certain fields to show then you won't be able to get them, that depends on their privacy settings.

Douglas Farias · Mar 25, 2015

maybe you have 2 accounts, one for android development?

nop, later facebook update SDK, this is changed i dont know why.
a time a go i got the correct number 100000606767838, later facebook update all ids change.
i dont use this lib to save facebookid on database, but if any user have used this many time go have problems with db and facebook lib

leitor79 · Mar 27, 2015

NJDude said:
If the user is not allowing certain fields to show then you won't be able to get them, that depends on their privacy settings.

Hi NJ, thanks for your answer!

The data I'm trying to retrieve it's my own profile... it's possible I'm not allowing myself to get my own info?

It's like the API is not allowing to get some information?

Regards!

Mark Thorndyke · Apr 8, 2015

Thanks for this NJDude. Working a treat without any hassles. Thankfully easy to adapt an old flash app page to test this with before squirting into my current project. Token sticks on various devices after reboots, which is handy.
Donation will head your way later in the month

leitor79 · Apr 14, 2015

Hi,

I'm having an issue with the library.

I have my app log into facebook OK and, at Login_Response, I make a customrequest asking for the user friends who uses the app. I have several test users configured, some of them added as friends among the others, and it works ok.

But, today it happened for the second time (ever; last time was a couple of weeks ago and I thougth I did something wrong); after I log in, instead of showing the website and the activity later, the user profile is shown, like the facebook mobile profile. Name, picture, message saying I have yet fields to complete (where I study, etc), icons on the top (activity, messages, friends), etc. I have an "x" button at top-right, which I use to go back and, apparently, I'm logged.

This is not the problem. The problem is that after that, the test user starts to behave strange. The following customrequest...

FB.CustomRequest("GET","/me/friends?","friends")

...wich until then worked fine, starts to return:

{"data":[]}

(that's the output of Log(JSONText) in customrequest_response)

I've tried changing the loginwithpermissions for login and adding the permissions later, I've cleared data & cache... nothing worked; I have to switch the test user I use to log in in order to get the customrequest working again.

Any ideas?

Thank you very much!

analizer3816 · Jun 1, 2015

NJDude I tested example after april 30,2015 then it shows error after login "Invalid Scopeffline_access"
I found facebook change permission and remove offline_access
Can you updated new version for remove offline_access?
thanks

Petrovic · Jun 11, 2015

Is there any update of this library as it don't work anymore. I used it in my Android app to share images to fb, and as I have cca 2500 users that use my app
but now they have a error with fb login and functions. What can I do about this, and I believe I'm not the only one.
Please NJDude or Erel or someone HELP!

NJDude · Jun 12, 2015

I have modified the lib and removed the "offline_access" permission, however Facebook has changed again the API so some other things might not work.

On that note, I have to say it: Facebook ALWAYS sucked.

Alberto Michelis · Jun 23, 2015

How can I redirect the user from my app to a Group page in Facebook?
Thanks

tamayo461 · Aug 6, 2015

hello @NJDude , as I can regain telephone profile information ?? some like fb.USER_FIELD_CEL

ivanomonti · Nov 15, 2015

hi,

hello, I found many mistakes after login type you are unable to post and go over to my profile, attach images :-(

analizer3816 · Nov 16, 2015

Demo app not update then you must try with facebook and guide.zip+facebook_lib_1.9.zip on first page
now facebok use API 2.3 and 2.5 then old lib cannot post to timeline

ivanomonti · Nov 16, 2015

analizer3816 said:
Demo app not update then you must try with facebook and guide.zip+facebook_lib_1.9.zip on first page
now facebok use API 2.3 and 2.5 then old lib cannot post to timeline

sorry I did not understand, the library must be updated from 2.3 to 2.5?

B4A Library Facebook

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