How to add calendar events to default calendar, silently without Intent, in android 4?

I want to add calendar events programmatically (directly) in android 4+. Is it this possible to be tested on emulator? I don't own an android phone. Some sample code would be appreciated. I read Calendar Provider of android developers but I'm confused. How can I add events to the default calendar of a user? I don't need to be synced.

EDIT: I do not want to launch an event adding Intent. Instead I want to add them completely from code and not launch another activity. I need to be able to test on an emulator that the events will be added to the main calendar of the default user of the device. How do I set up an emulator to view the default calendar of the user?