FBStartSession (Function)

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WLanguage functions

Communication

Facebook functions

Prefix syntax

FBStartSession

Presentation

Example

Starting the session

Characteristics of the session

Closing the session

Application in the background: Specific case from Android 10

See also

FBStartSession (Function)

In french: FBOuvreSession

Used to authenticate and log in to Faceboook.

This function is not available in the simulator.

Caution: This feature is available up to Android 11. Starting with Android 12, this function causes a fatal error.
It is recommended to:

test the Android version used with SysAndroidVersion.
use AuthIdentify to manage Facebook authentication.

Example

MySession is fbSession
MySession.AppID = "1702546803104741"
MySession.AppSecret = "badf00ddeadbeefbadc0deoff1ce8ecd"
MySession.Permission = [fbInfoProfile, fbEmail]
IF FBStartSession(MySession) THEN
Info("Connected")
END

Syntax

Synchronous authentication Hide the details

<Result> = FBStartSession(<Session>)

<Result>: Boolean

True if the connection was established,
False otherwise.

<Session>: fbSession variable

Name of fbSession variable corresponding to the connection to initialize.

Asynchronous authentication Hide the details

FBStartSession(<Session> , <WLanguage procedure>)

<Session>: fbSession variable

Name of fbSession variable corresponding to the connection to initialize.

<WLanguage procedure>: Procedure name

Name of the WLanguage procedure ("callback") called during the connection. This procedure has the following format:

<Procedure name>(Connection, Session)

where:
<Connection> is set to:
True if the connection was established,
False otherwise.
<Session> is a variable of type fbSession that corresponds to the initialized connection.

Remarks

Starting the session

FBStartSession authenticates users on a Facebook server. This function initializes the connection with the server and must be called before any interaction with Facebook.
The function uses the Facebook account entered by the user on the phone (if it is specified).
A single session can be started at a time. If FBStartSession is called while a session is already open, the previous session will be closed.
The FBStartSession function must only be called from the main the thread of the application.

Characteristics of the session

The "public_profile" permission is always required when starting a Facebook session. If this permission was not specified in the list of permissions for the fbSession variable passed as parameter to FBStartSession, this permission will be automatically requested.

Closing the session

A started Facebook session is a persistent session: it will remain open:

until the application is closed.
until FBStopSession is called.

Application in the background: Specific case from Android 10

From Android 10, it is no longer possible to open a window when the application is in the background.

FBStartSession can open a window. If this function is used while the application is in the background, a fatal error will occur.

Tips:

It is possible to determine if the application is in the background using InBackgroundMode.
If an application needs to interact with the user while it is in the background, the solution is to display a notification (via the Notification type). The application will be brought back to the foreground when the notification is clicked, if the ActivateApplication property is set to True. You can also open a window from the procedure passed to the ActionClick property.

For more details, see Android 10: Behavior of applications in the background.

Business / UI classification: Business Logic

Component: wd280ggl.dll