要获得当前的时间/日期，只需使用以下代码片段:

使用时间:

SimpleDateFormat simpleDateFormatTime = new SimpleDateFormat("HH:mm", Locale.getDefault());
String strTime = simpleDateFormatTime.format(now.getTime());

使用日期:

SimpleDateFormat simpleDateFormatDate = new SimpleDateFormat("E, MMM dd, yyyy", Locale.getDefault());    
String strDate = simpleDateFormatDate.format(now.getTime());

这样就可以开始了。

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);
    Thread myThread = null;

    Runnable runnable = new CountDownRunner();
    myThread= new Thread(runnable);   
    myThread.start();

}

public void doWork() {
    runOnUiThread(new Runnable() {
        public void run() {
            try{
                TextView txtCurrentTime= (TextView)findViewById(R.id.lbltime);
                    Date dt = new Date();
                    int hours = dt.getHours();
                    int minutes = dt.getMinutes();
                    int seconds = dt.getSeconds();
                    String curTime = hours + ":" + minutes + ":" + seconds;
                    txtCurrentTime.setText(curTime);
            }catch (Exception e) {}
        }
    });
}


class CountDownRunner implements Runnable{
    // @Override
    public void run() {
            while(!Thread.currentThread().isInterrupted()){
                try {
                doWork();
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                        Thread.currentThread().interrupt();
                }catch(Exception e){
                }
            }
    }
}

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);

要获得当前的时间/日期，只需使用以下代码片段:

使用时间:

SimpleDateFormat simpleDateFormatTime = new SimpleDateFormat("HH:mm", Locale.getDefault());
String strTime = simpleDateFormatTime.format(now.getTime());

使用日期:

SimpleDateFormat simpleDateFormatDate = new SimpleDateFormat("E, MMM dd, yyyy", Locale.getDefault());    
String strDate = simpleDateFormatDate.format(now.getTime());

这样就可以开始了。