如果你想要一行代码:

String date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime());

结果是“2016-09-25 16:50:34”

Use:

Calendar c = Calendar.getInstance();

int seconds = c.get(Calendar.SECOND);
int minutes = c.get(Calendar.MINUTE);
int hour = c.get(Calendar.HOUR);
String time = hour + ":" + minutes + ":" + seconds;


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

// Assuming that you need date and time in a separate
// textview named txt_date and txt_time.

txt_date.setText(date);
txt_time.setText(time);

这将给出当前的日期和时间:

public String getCurrDate()
{
    String dt;
    Date cal = Calendar.getInstance().getTime();
    dt = cal.toLocaleString();
    return dt;
}

如果您想以特定的模式获取日期和时间，可以使用

Date d = new Date();
CharSequence s = DateFormat.format("yyyy-MM-dd hh:mm:ss", d.getTime());

这并不难，因为有几种方法可以做到这一点。我假设你想把当前的日期和时间放入TextView。

String currentDateTimeString = java.text.DateFormat.getDateTimeInstance().format(new Date());

// textView is the TextView view that should display it
textView.setText(currentDateTimeString);

文档中有更多内容，可以在这里轻松找到 ． 在那里，您将找到关于如何更改用于转换的格式的更多信息。

试试下面的代码:

SimpleDateFormat dateFormat = new SimpleDateFormat(
                                    "yyyy/MM/dd HH:mm:ss");

Calendar cal = Calendar.getInstance();
System.out.println("time => " + dateFormat.format(cal.getTime()));

String time_str = dateFormat.format(cal.getTime());

String[] s = time_str.split(" ");

for (int i = 0; i < s.length; i++) {
     System.out.println("date  => " + s[i]);
}

int year_sys = Integer.parseInt(s[0].split("/")[0]);
int month_sys = Integer.parseInt(s[0].split("/")[1]);
int day_sys = Integer.parseInt(s[0].split("/")[2]);

int hour_sys = Integer.parseInt(s[1].split(":")[0]);
int min_sys = Integer.parseInt(s[1].split(":")[1]);

System.out.println("year_sys  => " + year_sys);
System.out.println("month_sys  => " + month_sys);
System.out.println("day_sys  => " + day_sys);

System.out.println("hour_sys  => " + hour_sys);
System.out.println("min_sys  => " + min_sys);