方式一 ：方法过时 不影响使用

import android.text.format.Time;

/**
     * 判断当前系统时间是否在指定时间的范围内
     *
     * beginHour 开始小时,例如8
     * beginMin  开始小时的分钟数,例如30
     * endHour   结束小时,例如 20
     * endMin    结束小时的分钟数,例如0
     * true表示在范围内, 否则false
     */
    public static boolean isCurrentInTimeScope(int beginHour, int beginMin, int endHour, int endMin){
        boolean result = false;
        final long aDayInMillis  = 1000 * 60 * 60 *24;
        final long currentTimeMillis = System.currentTimeMillis();
        Time now = new Time();
        now.set(currentTimeMillis);

        Time startTime = new Time();
        startTime.set(currentTimeMillis);
        startTime.hour = beginHour;
        startTime.minute = beginMin;

        Time endTime = new Time();
        endTime.set(currentTimeMillis);
        endTime.hour = endHour;
        endTime.minute = endMin;

        if (!startTime.before(endTime)){
            startTime.set(startTime.toMillis(true) - aDayInMillis);
            result = !now.before(startTime) && !now.after(endTime); // startTime <= now <= endTime
            Time startTimeInThisDay = new Time();
            startTimeInThisDay.set(startTime.toMillis(true) + aDayInMillis);
            if (!now.before(startTimeInThisDay)) {
                result = true;
            }
        }else {
            //普通情况(比如 8:00 - 18:00)
            result = !now.before(startTime) && !now.after(endTime); // startTime <= now <= endTime
        }
        return result;
    }

方式二：简便

public static boolean isCurrentInTimeScope2(){
        boolean result = false;
        Calendar calendar = Calendar.getInstance();
        int hour = calendar.get(Calendar.HOUR);
        int minute = calendar.get(Calendar.MINUTE);
        int minuteOfDay  = hour * 60 + minute;// 从0:00分开是到目前为止的分钟数
        final int startTime = 8 * 60;//起始时间的分钟数
        final int endTime = 20 * 60;//结束时间的分钟数

        if (minuteOfDay >= startTime && minuteOfDay <= endTime){
            result = true;
        }else {
            result = false;
        }
        return result;
    }

以上两种都可以添加到工具类中直接使用。