AddEventToGoogleCal.java

long calId = System.currentTimeMillis();
CalendarEvent calendarEvent = new CalendarEvent();
calendarEvent.setTitle(eventName);
calendarEvent.setDescr(eventDescription);
calendarEvent.setLocation(venue);
calendarEvent.setStartTime(receivedStartMilliSeconds);
calendarEvent.setEndTime(receivedEndMilliSeconds);
calendarEvent.setEventTimezone(TimeZone.getDefault().getID());
calendarEvent.setIdCalendar(calId);
//its function
addEvent(calendarEvent);



public void addEvent(CalendarEvent evt) {
        try {

            ContentResolver cr = ctx.getContentResolver();
            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_CALENDAR) != PackageManager.PERMISSION_GRANTED) {
                
                return;
            }
            Uri uri = cr.insert(CalendarContract.Events.CONTENT_URI, CalendarEvent.toICSContentValues(evt));
            Util.showToastMessage(activity, getResources().getString(R.string.str_event_added_in_your_calendar));

            Uri evtUri = ctx.getContentResolver().insert(getCalendarUri("events"),
                    CalendarEvent.toContentValues(evt));
            Log.d("Info", "" + evtUri);
        }catch (Exception e){
            e.printStackTrace();
        }

    }