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

Question

I want to check if a week has passed (using Calendar Class) and if it has then I need to print a message.

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");
}

Any suggestions or answers would be brilliant! Thanks.

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

At first you can store the first date as a UNIX timestamp. Then you can compare the current timestamp in seconds with the old, first saved timestamp whenever you want to check if 7 days past or not like below.

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

Then you can compare by looking if 604800 seconds past or not.

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");
}