如何比较从采摘者到当前日期的日期和时间 [英] how to compare date and time got from pickers with current date

问题描述

date = formatter.parse(dateInString);
				time = (Date) formatterTime.parse(timeInString);
				Calendar current = Calendar.getInstance();

				Calendar cal = Calendar.getInstance();
				/*
				 * cal.set(DatePicker.g, pickerDate.getMonth(), pickerDate.getDayOfMonth(), pickerTime.getCurrentHour(),
				 * pickerTime.getCurrentMinute(), 00);
				 */
				cal.set(date.getYear(),date.getMonth(),date.getDay(),time.getHours(),time.getMinutes());//error i think so 

				if (cal.compareTo(current) <= 0)
				{
					// setAlarm(cal);
					// The set Date/Time already passed
					Toast.makeText(getApplicationContext(), "Invalid Date/Time", Toast.LENGTH_LONG).show();
				}
				else
				{
					 setAlarm(cal);
					 db.addContact(new Contact_details(name1, mobile_number1, home_number1, company_name1, jobtitle1, emailid1, date, time));
				}

如果我设置的日期和时间更长，我也会得到无效的日期和时间？。有人说如何比较日期和时间

if i set date and time greater also i am getting invalid date and time ?.can anyone say how to compare date and time

推荐答案

您的问题是您的两个方法调用没有返回您认为的值，如文档 [ ^ ]。

getYear 返回自1900年以来的年度，即2014年的114年。

getDay 返回星期几，而不是月中的某天。

您的代码应为：

Your problem is that two of your method calls do not return the values that you think, as described in the documentation[^].
getYear returns the year since 1900, i.e. 114 for 2014.
getDay returns the day of the week, not the day of the month.
Your code should read:

Calendar cal = Calendar.getInstance();
cal.set(date.getYear()+1900,date.getMonth(),date.getDate(),time.getHours(),time.getMinutes());

虽然注意到所有这些方法现在都已被弃用。



所以当你说比较没有发生时，那不是真的;它确实发生了，但总是产生错误的结果。

Although note that all these methods are now deprecated.

So when you said that comparison didn't take place, that was not quite true; it did take place, but always produced the wrong result.

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