前言

項(xiàng)目中有需求是實(shí)現(xiàn)類似與手機(jī)中勿擾模式的邏輯碾褂，判斷當(dāng)前時(shí)間點(diǎn)是否屬于指定時(shí)間段（24H）起暮。

實(shí)現(xiàn)思路

1. 獲取當(dāng)前時(shí)間谒臼、開始時(shí)間、結(jié)束時(shí)間的小時(shí)數(shù)hour酬屉、分鐘數(shù)minute
2. 首先比較hour半等，
   i. endHour > startHour揍愁，即結(jié)束時(shí)間在開始時(shí)間之后，說明這個(gè)時(shí)間段的起止時(shí)間都在同一天杀饵。
   ii. endHour < startHour莽囤，即結(jié)束時(shí)間在開始時(shí)間之前，說明這個(gè)時(shí)間段是從今天開始切距，明天結(jié)束朽缎。
   ?a. 若當(dāng)前日期在startHour之后 || 當(dāng)前日期在endHour之前，返回true
   ?b. 否則返回false
   iii. endHour = startHour谜悟，如果開始時(shí)間與結(jié)束時(shí)間小時(shí)數(shù)一樣话肖，就需要比較分鐘數(shù)了，與比較小時(shí)數(shù)同理赌躺。

    /*
    *  判斷當(dāng)前時(shí)間是否在設(shè)置的dark mode時(shí)間段內(nèi)
    *  @param date1: 開始時(shí)間（hh:mm）
    *  @param date2: 結(jié)束時(shí)間（hh:mm）
    */
    private boolean isBelongPeriodTime(String date1, String date2){
        SimpleDateFormat df = new SimpleDateFormat("HH:mm");
        Date currentTime = new Date(System.currentTimeMillis());
        Date startTimeDate;
        Date endTimeDate;
        Calendar date = Calendar.getInstance();
        Calendar begin = Calendar.getInstance();
        Calendar end = Calendar.getInstance();
        try{
            date.setTime(df.parse(df.format(currentTime)));
            startTimeDate = df.parse(date1);
            endTimeDate = df.parse(date2);
            begin.setTime(startTimeDate); 
            end.setTime(endTimeDate);
            if (endTimeDate.getHours() < startTimeDate.getHours()) {
                if (date.after(begin) || date.before(end)) {
                    Log.d(TAG, "current time is belong to " + date1 + " - " + date2);
                    return true;
                }else {
                    Log.d(TAG, "current time isn't belong to " + date1 + " - " + date2);
                    return false;
                }
            }else if(endTimeDate.getHours() == startTimeDate.getHours()){
                if (endTimeDate.getMinutes() < startTimeDate.getMinutes()) {
                    if (date.after(begin) || date.before(end)) {
                        Log.d(TAG, "current time is belong to " + date1 + " - " + date2);
                        return true;
                    }else {
                        Log.d(TAG, "current time isn't belong to " + date1 + " - " + date2);
                        return false;
                    }
                }
            }
        }catch(ParseException e){
            e.printStackTrace();
        }
        //這里是時(shí)間段的起止都在同一天的情況狼牺，只需要判斷當(dāng)前時(shí)間是否在這個(gè)時(shí)間段內(nèi)即可
        if (date.after(begin) && date.before(end)) {
            Log.d(TAG, "current time is belong to " + date1 + " - " + date2);
            return true;
        }else {
            Log.d(TAG, "current time isn't belong to " + date1 + " - " + date2);
            return false;
        }
    }

記個(gè)Date的after()方法應(yīng)用羡儿，以后復(fù)制用

/*
    ** 判斷當(dāng)前時(shí)間是否在傳入的時(shí)間之后
    */
    private boolean isAfterTime(String time){
        SimpleDateFormat df = new SimpleDateFormat("HH:mm");
        Date currentTime = new Date(System.currentTimeMillis());
        Calendar curTime = Calendar.getInstance();
        Calendar scaTime = Calendar.getInstance();
        try{
            Date timeScale = df.parse(time);
            curTime.setTime(df.parse(df.format(currentTime)));
            scaTime.setTime(timeScale);
        }catch (ParseException e){
            e.printStackTrace();
        }
        if (curTime.after(scaTime)) {
            return true;
        }else {
            return false;
        }
    }