VscoolOS/app/src/main/java/com/vscool/os/utils/DayUtils.java

package com.vscool.os.utils;

import java.util.Calendar;
import java.util.Date;

public class DayUtils {
    public static boolean isNight() {
        Calendar calendar = Calendar.getInstance();
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        int minute = calendar.get(Calendar.MINUTE);
        int second = calendar.get(Calendar.SECOND);
        return hour >= 16 && minute >= 30;
    }

    private static final String[] WEEKS = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};


    /**
     * @return 根据日期取得星期几
     */
    public static String getWeek(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int weekIndex = cal.get(Calendar.DAY_OF_WEEK) - 1;
        if (weekIndex < 0) {
            weekIndex = 0;
        }
        return WEEKS[weekIndex];
    }

    public static String getWeek() {
        Date date = new Date();
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int weekIndex = cal.get(Calendar.DAY_OF_WEEK) - 1;
        if (weekIndex < 0) {
            weekIndex = 0;
        }
        return WEEKS[weekIndex];
    }
}