Two methods for android to get the current time accurate to milliseconds

In development, some projects need to obtain the current time accurate to milliseconds. How to obtain it? Now we share two methods:
1. Use the SimpleDateFormat class to obtain

val df = SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS")//设置日期格式精确到毫秒 SSS代表毫秒
val date= df.format(Date())// new Date()为获取当前系统时间
Log.e("MainActivity","当前时间:"+date)

2. Use the Calendar class to get

Calendar Cld = Calendar.getInstance();
        int YY = Cld.get(Calendar.YEAR) ;
        int MM = Cld.get(Calendar.MONTH)+1;
        int DD = Cld.get(Calendar.DATE);
        int HH = Cld.get(Calendar.HOUR_OF_DAY);
        int mm = Cld.get(Calendar.MINUTE);
        int SS = Cld.get(Calendar.SECOND);
        int MI = Cld.get(Calendar.MILLISECOND);//毫秒