Android: 如何使用日历检查一周是否过去 class

Question

我想检查一周是否已经过去（使用 Calendar Class），如果已经过去那么我需要打印一条消息。

int lastCallDate = Calendar.SATURDAY;

int day = calender.get(Calendar.DAY_OF_WEEK);

if (day == lastCallDate + 7) {
    System.out.println("It's been a week");
} else { 
    System.out.println("It hasn't been a week");
}

任何建议或答案都会很棒！谢谢

Answer 1

if (day %lastCallDate ==0){
        System.out.println("It's been a week");

} else {

         System.out.println("It hasn't been a week");
}

Answer 2

首先您可以将第一个日期存储为 UNIX 时间戳。然后，您可以将当前时间戳（以秒为单位）与旧的、第一次保存的时间戳进行比较，只要您想检查是否已过去 7 天，如下所示。

Calendar cal = Calendar.getInstance(Locale.getDefault());
long firstTimestampInSec = cal.getTimeInMillis() / 1000;

然后你可以通过查看是否过去了 604800 秒来进行比较。

Calendar cal = Calendar.getInstance(Locale.getDefault());
long currentTimestampInSec = cal.getTimeInMillis() / 1000;
int oneWeekAsSec = 604800;

long firstTimestampInSec = getOldStoredTimestamp(); //First stored timestamp as seconds
if(currentTimestampInSec >= firstTimestampInSec + oneWeekAsSec){
    System.out.println("It's been a week");
}
else{
    System.out.println("It hasn't been a week");
}

Android: 如何使用日历检查一周是否过去 class

Android: How to check whether a week has passed using Calendar class

java

android

android-calendar