下面是一些获取时间和日期的方法:

public static void getCurrentTimeUsingDate() {
    Date date = new Date();
    String strDateFormat = "hh:mm:ss a";
    DateFormat dateFormat = new SimpleDateFormat(strDateFormat);
    String formattedDate= dateFormat.format(date);
    Toast.makeText(this, formattedDate, Toast.LENGTH_SHORT).show();
}

使用日历的时间

public static void getCurrentTimeUsingCalendar() {
    Calendar cal = Calendar.getInstance();
    Date date=cal.getTime();
    DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
    String formattedDate=dateFormat.format(date);
    Toast.makeText(this, formattedDate, Toast.LENGTH_SHORT).show();
}

当地时间日期

public static void getCurrentTime(){
    System.out.println("-----Current time of your time zone-----");
    LocalTime time = LocalTime.now();
    Toast.makeText(this, time, Toast.LENGTH_SHORT).show();
}

分区时间

public static void getCurrentTimeWithTimeZone(){
    Toast.makeText(this, "Current time of a different time zone using LocalTime", Toast.LENGTH_SHORT).show();

    ZoneId zoneId = ZoneId.of("America/Los_Angeles");
    LocalTime localTime=LocalTime.now(zoneId);
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss");
    String formattedTime=localTime.format(formatter);
    Toast.makeText(this,formattedTime , Toast.LENGTH_SHORT).show();
}

获取当前时间和日期的简单方法

import java.util.Calendar

Date currentTime = Calendar.getInstance().getTime();

下面的方法将以字符串形式返回当前日期和时间，请根据您的实际时区使用不同的时区。我用的是格林尼治时间。

public static String GetToday(){
    Date presentTime_Date = Calendar.getInstance().getTime();
    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
    return dateFormat.format(presentTime_Date);
}

对于当前带格式的日期和时间，使用:

在Java中

Calendar c = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String strDate = sdf.format(c.getTime());
Log.d("Date", "DATE: " + strDate)

在Kotlin

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    val current = LocalDateTime.now()
    val formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy. HH:mm:ss")
    var myDate: String =  current.format(formatter)
    Log.d("Date", "DATE: " + myDate)
} else {
    var date = Date()
    val formatter = SimpleDateFormat("MMM dd yyyy HH:mma")
    val myDate: String = formatter.format(date)
    Log.d("Date", "DATE: " + myDate)
}

日期格式化程序模式

"yyyy.MM.dd G 'at' HH:mm:ss z" ---- 2001.07.04 AD at 12:08:56 PDT
"hh 'o''clock' a, zzzz" ----------- 12 o'clock PM, Pacific Daylight Time
"EEE, d MMM yyyy HH:mm:ss Z"------- Wed, 4 Jul 2001 12:08:56 -0700
"yyyy-MM-dd'T'HH:mm:ss.SSSZ"------- 2001-07-04T12:08:56.235-0700
"yyMMddHHmmssZ"-------------------- 010704120856-0700
"K:mm a, z" ----------------------- 0:08 PM, PDT
"h:mm a" -------------------------- 12:08 PM
"EEE, MMM d, ''yy" ---------------- Wed, Jul 4, '01

对于当前日期和时间，使用:

String mydate = java.text.DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime());

输出:

Feb 27, 2012 5:41:23 PM

Date todayDate = new Date();
todayDate.getDay();
todayDate.getHours();
todayDate.getMinutes();
todayDate.getMonth();
todayDate.getTime();

如果需要当前日期:

Calendar cc = Calendar.getInstance();
int year = cc.get(Calendar.YEAR);
int month = cc.get(Calendar.MONTH);
int mDay = cc.get(Calendar.DAY_OF_MONTH);
System.out.println("Date", year + ":" + month + ":" + mDay);

如果需要当前时间:

 int mHour = cc.get(Calendar.HOUR_OF_DAY);
 int mMinute = cc.get(Calendar.MINUTE);
 System.out.println("time_format" + String.format("%02d:%02d", mHour , mMinute));