I did all the staffs needed to do. But, I can’t click the Facebook connect button in leaderboard on android. Do I need to install Facebook on android first? And please tell me where I can get more details about Facebook plugin. Thanks
You are right, plugins are available starting with an indie license.
They require a valid license key that matches your app-id and includes the plugin.
License keys can be created here: Create License Key
To try the plugin, you can have a look at the Facebook sample on Github: Facebook Sample It contains a demo license key that matches the net.vplay.plugins.FacebookSample app identifier of the sample.