static String dayNames[] = {"周日", "周一", "周二", "周三", "周四", "周五", "周六"};

/**
 * 时间戳格式转换
 */
public static String getNewChatTime(long timestamp) {
    String result = "";

    Calendar curCalendar = Calendar.getInstance();
    Calendar showCalendar = Calendar.getInstance();
    showCalendar.setTimeInMillis(timestamp);

    String timeFormat;
    String yearTimeFormat;
    String am_pm = "";
    int hour = showCalendar.get(Calendar.HOUR_OF_DAY);
    if (hour >= 0 && hour < 6) {
        am_pm = "凌晨";
    } else if (hour >= 6 && hour < 12) {
        am_pm = "早上";
    } else if (hour == 12) {
        am_pm = "中午";
    } else if (hour > 12 && hour < 18) {
        am_pm = "下午";
    } else if (hour >= 18) {
        am_pm = "晚上";
    }
    timeFormat = "M月d日 " + am_pm + "HH:mm";
    yearTimeFormat = "yyyy年M月d日 " + am_pm + "HH:mm";

    boolean yearTemp = curCalendar.get(Calendar.YEAR) == showCalendar.get(Calendar.YEAR);
    if (yearTemp) {
        int curMonth = curCalendar.get(Calendar.MONTH);
        int showMonth = showCalendar.get(Calendar.MONTH);
        // 表示是同一个月
        if (curMonth == showMonth) {
            int temp = curCalendar.get(Calendar.DATE) - showCalendar.get(Calendar.DATE);
            switch (temp) {
                case 0:
                    result = getHourAndMin(timestamp);
                    break;
                case 1:
                    result = "昨天 " + getHourAndMin(timestamp);
                    break;
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                    int curDayOfMonth = curCalendar.get(Calendar.WEEK_OF_MONTH);
                    int showDayOfMonth = showCalendar.get(Calendar.WEEK_OF_MONTH);
                    // 表示是同一周
                    if (showDayOfMonth == curDayOfMonth) {
                        int dayOfWeek = showCalendar.get(Calendar.DAY_OF_WEEK);
                        //判断当前是不是星期日     如想显示为：周日 12:09 可去掉此判断
                        if (dayOfWeek != 1) {
                            result = dayNames[showCalendar.get(Calendar.DAY_OF_WEEK) - 1]
                                    + getHourAndMin(timestamp);
                        } else {
                            result = getTime(timestamp, timeFormat);
                        }
                    } else {
                        result = getTime(timestamp, timeFormat);
                    }
                    break;
                default:
                    result = getTime(timestamp, timeFormat);
                    break;
            }
        } else {
            result = getTime(timestamp, timeFormat);
        }
    } else {
        result = getYearTime(timestamp, yearTimeFormat);
    }
    return result;
}

/**
 * 当天的显示时间格式
 *
 * @param time time
 * @return HH:mm
 */
public static String getHourAndMin(long time) {
    SimpleDateFormat format = new SimpleDateFormat("HH:mm");
    return format.format(new Date(time));
}

/**
 * 不同一周的显示时间格式
 *
 * @param time       time
 * @param timeFormat timeFormat
 * @return String
 */
public static String getTime(long time, String timeFormat) {
    SimpleDateFormat format = new SimpleDateFormat(timeFormat);
    return format.format(new Date(time));
}

/**
 * 不同年的显示时间格式
 *
 * @param time           time
 * @param yearTimeFormat yearTimeFormat
 * @return String
 */
public static String getYearTime(long time, String yearTimeFormat) {
    SimpleDateFormat format = new SimpleDateFormat(yearTimeFormat);
    return format.format(new Date(time));
}