將對比後的時間，格式化爲：xx分鐘前，xx小時前和日期

/**
 * 將對比後的時間，格式化爲：xx分鐘前，xx小時前和日期
 *
 * @param time 比對的時
 * @return
 */
public static String convert_before(long time) {
    if (time < 0)
        return String.valueOf(time);

    int difftime = (int) ((System.currentTimeMillis() - time) / 1000);
    if (difftime < 86400 && difftime > 0) {
        if (difftime < 3600) {
            int min = (int) (difftime / 60);
            if (min == 0)
                return "剛剛";
            else
                return (int) (difftime / 60) + "分鐘";
        } else {
            return (int) (difftime / 3600) + "小時";
        }
    } else {
        Calendar now = Calendar.getInstance();
        Calendar c = Calendar.getInstance();
        c.setTimeInMillis(time);
        if (c.get(Calendar.YEAR) == now.get(Calendar.YEAR) && c.get(Calendar.MONTH) == now.get(Calendar.MONTH)
                && c.get(Calendar.DATE) == now.get(Calendar.DATE)) {
            return new SimpleDateFormat("HH:mm").format(c.getTime());
        }
        if (c.get(Calendar.YEAR) == now.get(Calendar.YEAR) && c.get(Calendar.MONTH) == now.get(Calendar.MONTH)
                && c.get(Calendar.DATE) == now.get(Calendar.DATE) - 1) {
            return new SimpleDateFormat("昨天 HH:mm").format(c.getTime());
        } else if (c.get(Calendar.YEAR) == now.get(Calendar.YEAR)
                && c.get(Calendar.MONTH) == now.get(Calendar.MONTH)
                && c.get(Calendar.DATE) == now.get(Calendar.DATE) - 2) {
            return new SimpleDateFormat("前天 HH:mm").format(c.getTime());
        } else if (c.get(Calendar.YEAR) == now.get(Calendar.YEAR)) {
            return new SimpleDateFormat("M月dd日 HH:mm").format(c.getTime());
        } else {
            return new SimpleDateFormat("yy年M月dd日").format(c.getTime());
        }
    }
}