如何以编程方式更新日历事件？我无法更新

Question

我无法以编程方式更新日历活动详情。这是代码示例。任何帮助都应该非常感谢。

        Uri CALENDAR_URI = Uri.parse("content://com.android.calendar/events");
        Cursor c = context.getContentResolver().query(CALENDAR_URI, null, null, null, null);
        String[] s = c.getColumnNames();

        if (c.moveToFirst()) {
            while (c.moveToNext()) {

                String _id = c.getString(c.getColumnIndex("_id"));
                String CalId = c.getString(c.getColumnIndex("calendar_id"));
                if ((_id == null) && (CalId == null)) {
                    return false;
                } else {
                    if (_id.equals(eventId) && CalId.equals(cal_Id)) {
                        Uri uri = ContentUris.withAppendedId(CALENDAR_URI, Integer.parseInt(_id));
                        ContentValues event = new ContentValues();
                        event.put(CalendarContract.Events.SELF_ATTENDEE_STATUS, statusId);

                        context.getContentResolver().update(uri, event, null, null);// need to give your data here
                        return true;
                    }
                }
            }
        }