Question

根据一天中的时间，我将在一定时间内设置一个由alarmTime定义的警报。如果在上午9点之前，则运行一个条件；如果在上午9点至上午11点之间，则运行另一个条件，而在上午11点后，则运行另一个条件。但是，在上午9点之后，if（currentTime.before（at9））返回true，无论其12 pm、1pm等何时返回false。为什么会这样？

     // Get a calendar instance for the actual alarm
    Calendar alarmTime = Calendar.getInstance();
    // get the current time
    Calendar currentTime = (Calendar) alarmTime.clone();
    // This will set the values to the calendar
    currentTime.getTime();
    //get the time at 9AM
    Calendar at9 = (Calendar) alarmTime.clone();
    at9.set(Calendar.HOUR, 9);
    at9.set(Calendar.MINUTE,0);
    at9.set(Calendar.SECOND,0);
    // This will set the values to the calendar
    at9.getTime();
    //get the time at 11AM
    Calendar at11 = (Calendar) alarmTime.clone();
    at11.set(Calendar.HOUR, 11);
    at11.set(Calendar.MINUTE,0);
    at11.set(Calendar.SECOND,0);
    // This will set the values to the calendar
    at11.getTime();

    if(currentTime.before(at9)){// if it's less than 9am right now
        //set the alarm for 9am current day
        //the day should stay the same
        alarmTime.set(Calendar.HOUR_OF_DAY, Constants.REFRESH_TIME_HOUR);
        alarmTime.set(Calendar.MINUTE,20);
        alarmTime.set(Calendar.SECOND, 0);
    }
    else if(currentTime.after(at9) && currentTime.before(at11)){
        // Day should stay the same
        // Hour should stay he same
        alarmTime.add(Calendar.MINUTE, Constants.REFRESH_TIME_MINUTES);
        alarmTime.set(Calendar.SECOND, 0);
    }
    else{ //current time is after 11
        alarmTime.add(Calendar.DAY_OF_YEAR,1);
        alarmTime.set(Calendar.HOUR_OF_DAY, Constants.REFRESH_TIME_HOUR);
        alarmTime.set(Calendar.MINUTE,1);
        alarmTime.set(Calendar.SECOND, 0);
    }

Answer 1

如Pankaj Kumar所述，使用Calendar.HOUR_OF_DAY解决了该问题。 Calendar.HOUR字段是12小时格式，Calendar.HOUR_OF_DAY是24小时格式。

方法之前的日历在不应该返回的情况下返回true

1 个答案: