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Calendar calendar = Calendar.getInstance();未來某時間 Calendar calendarRemind = Calendar.getInstance();//中間時間 Date date = new Date(); long timeInMillis = (calendar.getTime().getTime() - date .getTime()) / 2; //不要使用calendar.getTimeInMillis() 這是獲取時間戳 calendarRemind.setTimeInMillis(date.getTime() + timeInMillis); |
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