Am I required to attend the injunction hearing?

Technically you're not required to attend the injunction hearing. However, if you're the petitioner, meaning you filed for the injunction, you should attend the hearing or your injunction will be dismissed. If you're the respondent, or the person on whom the injunction was served, you should show up even if you don't object to the injunction being entered, just so you can see what the court determined.