How to save events in Android & get reminders of events but without showing events to other Calendar Apps?

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http://stackoverflow.com – I have an app in which I am allowing the user to schedule future events and control volume settings during those times. So, I am allowing user to create events (with dates, times, and frequency). I was thinking of using the Calendar API in Android but I do not want these "event times" to be visible to other calendar apps. Can I use the Calendar APi - to save event times & get notifications AND also hide it from other apps? Or Do I have to implement my own reminder functionality (like a Service already in the background which reads event info from my own sqllite db and changes volume set (HowTos)