如果你只想获取日期，就像这样输入代码

Calendar.getInstance().getTime();

我尝试过这种方法，对我很有效。

val df = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ", Locale.getDefault()) // pass the format pattern that you like and done.
println(df.format(Date()))

Calendar c = Calendar.getInstance();
int day = c.get(Calendar.DAY_OF_MONTH);
int month = c.get(Calendar.MONTH);
int year = c.get(Calendar.YEAR);
String date = day + "/" + (month + 1) + "/" + year;

Log.i("TAG", "--->" + date);

 public String giveDate() {
    Calendar cal = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat("EEE, MMM d, yyyy");
    return sdf.format(cal.getTime());
 }

试试这个,

SimpleDateFormat timeStampFormat = new SimpleDateFormat("yyyyMMddHHmmssSS");
Date myDate = new Date();
String filename = timeStampFormat.format(myDate);

LocalDateTime ldt2 = LocalDateTime.now();
String year = ldt2.getYear()+"";
String month = ldt2.getMonthValue()+"";
String date = ldt2.getDayOfMonth()+"";
String hour = ldt2.getHour()+"";
String minute = ldt2.getMinute()+"";
String secs = ldt2.getSecond()+"";