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+)

asales · Jun 18, 2014

brelto85 said:
after called the LogIn method, returns the following error:

"Please verify you have internet Access"

The data connection is active
Where is the problem?

I have the same problem too. My connection is only wi-fi. Android: 2.3.6

NJDude · Jun 18, 2014

Hmmmm, ok, I'll take a look at the library's code, maybe there's an error that's not been captured properly.

asales · Jun 18, 2014

NJDude said:
Hmmmm, ok, I'll take a look at the library's code, maybe there's an error that's not been captured properly.

Hi NJDude, thanks. In the first tests the samples (Facebook_Project_And_Guide.zip and Facebook_Profile_Sample_2.zip) works fine: login and post in the wall. Now showed this message "connection Error.

NJDude · Jun 18, 2014

You mean the samples also shows that error?, that's weird, I just tested them and they work fine, let's hope Facebook didn't change the API again.

NJDude · Jun 18, 2014

Well, I just tested the samples and the library and it works for me, no errors.

brelto85 · Jun 19, 2014

AS2 said:
Hi NJDude, thanks. In the first tests the samples (Facebook_Project_And_Guide.zip and Facebook_Profile_Sample_2.zip) works fine: login and post in the wall. Now showed this message "connection Error.

same behavior...
probably that a configuration reason of facebook developer?

NJDude · Jun 19, 2014

It is possible, check your configurations, like I mentioned above, I don't have that problem, I even created a new project from scratch and worked fine.

brelto85 · Jun 19, 2014

if the message is generated by your library, do you can say what is the "if statement" that generated it?
probably your library works correctly because after uploadtotimeline, the response event fired and get the idpost but in the dashboard of my Facebook profile the post there isn't

In the Facebook's developer console the app is active, AppDomains, SiteURL and MobileSiteURL are setted
other settings to control?

asales · Jun 19, 2014

NJDude said:
It is possible, check your configurations, like I mentioned above, I don't have that problem, I even created a new project from scratch and worked fine.

Sorry NJDude, my mistake. I configured the "redirect URIs" with "http://" and put "http://www" in sample. Works now. Thanks.

brelto85 · Jun 19, 2014

AS2 said:
Sorry NJDude, my mistake. I configured the "redirect URIs" with "http://" and put "http://www" in sample. Works now. Thanks.

what do you mean with "redirect URIs"?
is "website" parameter of Initialize method?

If it, i've "http://www" in "website" parameter library that in the Facebook console

NJDude · Jun 19, 2014

AS2 said:
Sorry NJDude, my mistake. I configured the "redirect URIs" with "http://" and put "http://www" in sample. Works now. Thanks.

Ok thanks for letting me know, I thought Facebook changed something without telling anyone (as usual )

brelto85 · Jun 19, 2014

where is "redirect URIs"?

asales · Jun 19, 2014

brelto85 said:
where is "redirect URIs"?

"Valid OAuth redirect URIs" in tab "Advanced" of Settings in:
https://developers.facebook.com/apps/

brelto85 · Jun 19, 2014

ok thanks. this was empty
Now i've setted with "http://www.drividrivesafely.com/" that is the value of "website" parameter in the Initialize() method but i've the same error

brelto85 · Jun 19, 2014

that site must be real or not? is necessary upload a dummy.html file?

brelto85 · Jun 19, 2014

SOLVED! the problem of message error was generated because the first site was not online. changed it with a online site, it works. sorry!

however remains the problem that after posts a photo and response with IDPOST, the post isn't visible in my facebook's dashboard
there are some permission to do that?

brelto85 · Jun 23, 2014

brelto85 said:
however remains the problem that after posts a photo and response with IDPOST, the post isn't visible in my facebook's dashboard
there are some permission to do that?

some ideas?

NJDude · Jun 23, 2014

If you get an ID it means the post was sent, do you have more than 1 FB account? in order to see the posts on other accounts besides the developer's you have to make your Facebook App PUBLIC, the instructions are in the documentation (html) included with the library.

brelto85 · Jun 23, 2014

i've only one facebook's account
the app in developer center is public (image below)

this is app restrictions section

NJDude · Jun 23, 2014

I don't know what the problem might be, but it has to be with your settings for example, the only thing I see different with my test app is that the field: SOCIAL DISCOVERY is set to YES.

B4A Library Facebook

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