Question

我在android.On中做了dateTimePicker应用程序，我需要在特定dateTime.Ex之前和之后获得10分钟。如果用户选择“12/12/2010 5:00”，我需要将“12/12/2010 4:50”作为一个值＆amp; “12/12/2010 5:10”作为一个值。我怎么做+ 10分钟＆amp;特定时间-10分钟？

我的代码：

String DATETIMEBEFORE ;
String DATETIMEAFTER;
...
private TimePickerDialog.OnTimeSetListener timePickerListener = new TimePickerDialog.OnTimeSetListener() {
        public void onTimeSet(TimePicker view, int selectedHour,
                int selectedMinute) {
            hour = selectedHour;
            minute = selectedMinute;

            String DATETIME = new StringBuilder()
                    // Month is 0 based, just add 1
                    .append(month + 1).append("-").append(day).append("-")
                    .append(year).append(" ").append(pad(hour)).append(":")
                    .append(pad(minute)).toString();

如果DATETIME的值=“12/12/2010 5:00”。我需要得到 DATETIMEBEFORE value =“12/12/2010 4:50”＆amp; DATETIMEAFTER值=“12/12/2010 5:10”。感谢。

Answer 1

OPs代码后更新

public static String getTimeBefore10minutes(String currentDate) {

        SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy HH:mm");
        try {
            // Get calendar set to current date and time with Singapore time zone
            Calendar calendar = new GregorianCalendar(TimeZone.getTimeZone("Asia/Calcutta"));
            calendar.setTime(format.parse(currentDate));

            //Set calendar before 10 minutes
            calendar.add(Calendar.MINUTE, -10);     
            //Formatter 
            DateFormat formatter = new SimpleDateFormat("dd/MM/yyyy HH:mm");
            formatter.setTimeZone(TimeZone.getTimeZone("Asia/Calcutta"));  
            return formatter.format(calendar.getTime());
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return null;
    }

    public static String getTimeAfter10minutes(String currentDate) {

        SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy HH:mm");
        try {
            // Get calendar set to current date and time with Singapore time zone
            Calendar calendar = new GregorianCalendar(TimeZone.getTimeZone("Asia/Calcutta"));
            calendar.setTime(format.parse(currentDate));

            //Set calendar before 10 minutes
            calendar.add(Calendar.MINUTE, 10);     
            //Formatter 
            DateFormat formatter = new SimpleDateFormat("dd/MM/yyyy HH:mm");
            formatter.setTimeZone(TimeZone.getTimeZone("Asia/Calcutta"));  
            return formatter.format(calendar.getTime());
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return null;
    }

并打电话给

getTimeAfter10minutes("12/12/2010 5:00");
getTimeBefore10minutes("12/12/2010 5:00");

结果将是

12/12/2010 05:10
12/12/2010 04:50

详细了解我的博客Calculate Date Ranges

Answer 2

如果您有以毫秒为单位的选定时间，

long now = System.currentTimeMillis(); // or any time value in miliseconds
long tenMinuteBefore = now - 600000;
long tenMinuteAfter  = now + 600000;

如何获得10分钟之前＆amp;从android中的特定时间开始

2 个答案: