如何从android中的日历事件中获取开始时间和结束时间？

我想在android中获取日历事件的开始时间和结束时间？我如何才能获得它

这是我的密码

public static void readCalendarEvent(Context context) throws ParseException {
        ContentResolver contentResolver = context.getContentResolver();
        Calendar calendar = Calendar.getInstance();
        String dtstart = "dtstart";
        String dtend = "dtend";


        SimpleDateFormat    displayFormatter = new SimpleDateFormat("  MMMM dd, yyyy (EEEE)");

         stime=displayFormatter.format(calendar.getTime());     

        SimpleDateFormat startFormatter = new SimpleDateFormat("MM/dd/yy");
        String dateString = startFormatter.format(calendar.getTime());

        long after = calendar.getTimeInMillis();
        SimpleDateFormat formatterr = new SimpleDateFormat("hh:mm:ss MM/dd/yy");
        Calendar endOfDay = Calendar.getInstance();
        Date dateCCC = formatterr.parse("47:59:59 " + dateString);
        endOfDay.setTime(dateCCC);



        cursor = contentResolver.query(Uri.parse("content://com.android.calendar/events"), (new String[] { "calendar_id", "title", "description", "dtstart", "dtend", "eventLocation" }), "(" + dtstart + ">" + after + " and " + dtend + "<" + endOfDay.getTimeInMillis() + ")", null, "dtstart ASC");
        gCalendar = new ArrayList<GoogleCalendar>();
        try {
            System.out.println("Count=" + cursor.getCount());

            if (cursor.getCount() > 0) {

                System.out.println("the control is just inside of the cursor.count loop");
                while (cursor.moveToNext()) {
                    GoogleCalendar googleCalendar = new GoogleCalendar();
                    gCalendar.add(googleCalendar);
                    int calendar_id = cursor.getInt(0);
                    googleCalendar.setCalendar_id(calendar_id);
                    String title = cursor.getString(1);
                    googleCalendar.setTitle(title);
                    String description = cursor.getString(2);
                    googleCalendar.setDescription(description);
                    String dtstart1 = cursor.getString(3);
                    googleCalendar.setDtstart(dtstart1);                    
                    System.out.println("Starting date is :" +dtstart1);
                    String dtend1 = cursor.getString(4);
                    googleCalendar.setDtend(dtend1);
                    String eventlocation = cursor.getString(5);
                    googleCalendar.setEventlocation(eventlocation);
                }
            }
        } catch (AssertionError ex) {
            ex.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

publicstaticvoidreadcalendarEvent（上下文上下文）引发异常{
ContentResolver ContentResolver=context.getContentResolver（）；
日历=Calendar.getInstance（）；
字符串dtstart=“dtstart”；
字符串dtend=“dtend”；
SimpleDataFormat displayFormatter=新的SimpleDataFormat（“MMMM dd，yyyy（EEEE）”；
stime=displayFormatter.format（calendar.getTime（））；
SimpleDataFormat StartFormat=新SimpleDataFormat（“MM/dd/yy”）；
String dateString=startFormatter.format（calendar.getTime（））；
long after=calendar.getTimeInMillis（）；
SimpleDataFormat Formatter=新的SimpleDataFormat（“hh:mm:ss mm/dd/yy”）；
Calendar endOfDay=Calendar.getInstance（）；
Date-dateCCC=formatter.parse（“47:59:59”+日期字符串）；
endOfDay.setTime（日期CCC）；
cursor=contentResolver.query（Uri.parse（“content://com.android.calendar/events（“+dtstart+”>“+after+”和“+dtend+”Android的日历事件以毫秒为单位给出从时间纪元开始的开始或结束日期（1970年1月1日）.所以我从某人那里复制了一段代码，将毫秒转换为日期和时间。函数是

public static String getDate(long milliSeconds) {
            SimpleDateFormat formatter = new SimpleDateFormat(
                    "dd/MM/yyyy hh:mm:ss a");
            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(milliSeconds);
            return formatter.format(calendar.getTime());


}

然后我这样调用它来获取我要实现的日期时间值

Log.d("start date", getDate(Long.parseLong(cursor.getString(4))));

希望这能有所帮助。
任何答案都能帮上大忙吗？我得到的是这样的结束日期（结束日期：-1881036608）开始和结束时间是什么意思？你有它们的字符串表示法。如果你想转换时间，这是一个方便的网站