HOWTO inhibit display of the "Attending?" line in the Android calendar app when your application inserts rows into the Calendar Provider.

calendarprovidersample.java

import android.content.ContentValues;
import android.database.Cursor;
import android.provider.CalendarContract.Calendars;
import android.provider.CalendarContract.Events;

Cursor calendarCursor;
// query the Calendars provider, and position to the desired row
long calendarId = calendarCursor.getLong(calendarCursor.getColumnIndex(Calendars._ID));
String calendarOwner = calendarCursor.getString(calendarCursor.getColumnIndex(Calendars.OWNER_ACCOUNT));

ContentValues values = new ContentValues();
// fill in the useful stuff, like DTSTART, TITLE, etc.
values.put(Events.CALENDAR_ID, calendarId);

// these two values combine to inhibit the display of the "Attending?"
// line in the Calendar app.
values.put(Events.ORGANIZER, calendarOwner);
values.put(Events.HAS_ATTENDEE_DATA, 1);

getContext().getContentResolver().insert(Events.CONTENT_URI, values);