Ну а shareGenericMessage проверил? Я не знаю, что тебе ещё нужно если не это.
Код:
Shares a generic message intent. You should check isGenericShareAvailable() first before calling shareGenericMessage(). On Android, the user will be presented with a dialog form which to choose an installed application that can accept the message, using Android's Intent scheme feature. On iOS 6, the user will be presented with the built-in sharing options dialog (sms, mail, Facebook, Twitter, etc.) On iOS 5 and earlier, this function is not available. After the share intent is completed, GVShareEvent.GENERIC_MESSAGE_SHARED will be dispatched.