您应该根据新的API使用calendar类。Date类现在已弃用。

Calendar cal = Calendar.getInstance();

String date = "" + cal.get(Calendar.DATE) + "-" + (cal.get(Calendar.MONTH)+1) + "-" + cal.get(Calendar.YEAR);

String time = "" + cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE);

你可以通过以下方法获取日期:

Time t = new Time(Time.getCurrentTimezone());
t.setToNow();
String date = t.format("%Y/%m/%d");

这将给你一个漂亮的表单结果，如这个例子:"2014/02/09"。

你可以通过这个函数得到你的当地时间和GMT时间

public String getCurrentDate() {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy MMM dd hh:mm a zzz");
    Date date = new Date();
    sdf.setTimeZone(TimeZone.getTimeZone("GMT+6:00"));
    return sdf.format(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

一件容易的事。您可以剖析时间，以获得当前时间的单独值，如下所示:

Calendar cal = Calendar.getInstance();

int millisecond = cal.get(Calendar.MILLISECOND);
int second = cal.get(Calendar.SECOND);
int minute = cal.get(Calendar.MINUTE);

// 12-hour format
int hour = cal.get(Calendar.HOUR);

// 24-hour format
int hourofday = cal.get(Calendar.HOUR_OF_DAY);

日期也一样，如下所示:

Calendar cal = Calendar.getInstance();

int dayofyear = cal.get(Calendar.DAY_OF_YEAR);
int year = cal.get(Calendar.YEAR);
int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
int dayofmonth = cal.get(Calendar.DAY_OF_MONTH);

这是一个获取日期和时间的有用方法:

private String getDate(){
    DateFormat dfDate = new SimpleDateFormat("yyyy/MM/dd");
    String date=dfDate.format(Calendar.getInstance().getTime());
    DateFormat dfTime = new SimpleDateFormat("HH:mm");
    String time = dfTime.format(Calendar.getInstance().getTime());
    return date + " " + time;
}

你可以调用这个方法来获取当前的日期和时间值:

2017/01//09 19:23