For Example
Date to convert is 2020-05-10 01:00:00 Current Date is 2020-05-20 01:00:00
It should show 10 days ago
I'm using Calendar class
Calendar cal = Calendar.getInstance();
You can use java.time
for this, it is now available to lower API versions in Android due to Android API Desugaring:
public static void main(String[] args) {
// create the datetime ten days ago
LocalDateTime tenDaysBefore = LocalDateTime.of(2020, 5, 10, 1, 0, 0);
// create the one that is used as "today"
LocalDateTime current = LocalDateTime.of(2020, 5, 20, 1, 0, 0);
// calculate the period between them (this only considers the date part)
Period period = Period.between(tenDaysBefore.toLocalDate(), current.toLocalDate());
// define a formatter for human readable output
DateTimeFormatter outputDtf = DateTimeFormatter.ofPattern("EEEE, dd 'of' MMMM uuuu",
Locale.ENGLISH);
// and output a meaningful sentence
System.out.println(tenDaysBefore.format(outputDtf) + " was (approximately) "
+ period.getDays() + " days ago assuming "
+ current.format(outputDtf) + " is \"today\"");
}
This outputs
Sunday, 10 of May 2020 was (approximately) 10 days ago assuming Wednesday, 20 of May 2020 is "today"