Add event and reminder in the calendar app in programmatically

add_event.java

    public void SetEvent(View view) {
        long timeInMilliseconds = 0;
        String date = "2020-04-04";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Date mDate = null;
        try {
            mDate = sdf.parse(date);
            timeInMilliseconds = mDate.getTime();
            System.out.println("Date in milli :: " + timeInMilliseconds);
        } catch (ParseException e) {
            e.printStackTrace();
        }
    
        Calendar cal = Calendar.getInstance();
        cal.setTime(mDate);
        cal.set(Calendar.HOUR_OF_DAY, 8);
        cal.set(Calendar.MINUTE, 00);
        Intent intent = new Intent(Intent.ACTION_EDIT);
        intent.setType("vnd.android.cursor.item/event");
        intent.putExtra(CalendarContract.EXTRA_EVENT_BEGIN_TIME, cal.getTimeInMillis());
        intent.putExtra(CalendarContract.EXTRA_EVENT_ALL_DAY, false);
        intent.putExtra(CalendarContract.Events.TITLE, "this is title");
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(intent);
    }