common_helper/src/main/java/com/xiongyingqi/util/DateHelper.java
public static String getStringToday() {
        Date currentTime = new Date();
        SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd HHmmss");
        String dateString = formatter.format(currentTime);
        return dateString;
    }
public static String getStringToday() {
        Date currentTime = new Date();
        SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd HHmmss");
        String dateString = formatter.format(currentTime);
        return dateString;
    }
得到现在时间

@return 字符串 yyyyMMdd HHmmss