sdk/src/com/socialize/facebook/Facebook.java
public boolean extendAccessToken(Context context, ServiceListener serviceListener) {
        Intent intent = new Intent();

        intent.setClassName("com.facebook.katana",
                "com.facebook.katana.platform.TokenRefreshService");

        // Verify that the application whose package name is
        // com.facebook.katana
        // has the expected FB app signature.
        if (!validateServiceIntent(context, intent)) {
            return false;
        }

        return context.bindService(intent,
                new TokenRefreshServiceConnection(context, serviceListener),
                Context.BIND_AUTO_CREATE);
    }
public boolean extendAccessToken(Context context, ServiceListener serviceListener) {
        Intent intent = new Intent();

        intent.setClassName("com.facebook.katana",
                "com.facebook.katana.platform.TokenRefreshService");

        // Verify that the application whose package name is
        // com.facebook.katana
        // has the expected FB app signature.
        if (!validateServiceIntent(context, intent)) {
            return false;
        }

        return context.bindService(intent,
                new TokenRefreshServiceConnection(context, serviceListener),
                Context.BIND_AUTO_CREATE);
    }
Refresh OAuth access token method. Binds to Facebook for Android
stand-alone application application to refresh the access token. This
method tries to connect to the Facebook App which will handle the
authentication flow, and return a new OAuth access token. This method
will automatically replace the old token with a new one. Note that this
method is asynchronous and the callback will be invoked in the original
calling thread (not in a background thread).

@param context
The Android Context that will be used to bind to the Facebook
RefreshToken Service
@param serviceListener
Callback interface for notifying the calling application when
the refresh request has completed or failed (can be null). In
case of a success a new token can be found inside the result
Bundle under Facebook.ACCESS_TOKEN key.
@return true if the binding to the RefreshToken Service was created