First you should install Facebook connect plugin by following the instructions here
1. Find the Facebook Connect plugin - move mouse cursor over it, and click the Settings button.
2. You will be directed to the Facebook connect management page.
3. Follow the steps described on this page:
Enter your application Display Name and Contact Email.
You will be directed to the application Dashboard page.
Click Confirm in the Make app public? window.
4.Go to Settings tab, copy the Application ID and App secret
Add them into Admin Area > Plugins > Installed plugins > Facebook Connect plugin.
5. Click the Save button.
|Note: If the Facebook connect plugin is active and configured on your site, you have to follow these steps to configure it for your Android app.|