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Android

Luke Wilson
Luke Wilson
2,139 Points
Posted by Luke Wilson
Luke Wilson
2,139 Points

Finding the seconds since you were born in android studio

Hi All,

I know high-level questions can be more tricky but I am really stumped on this one.

I am trying to create an application that takes a date from a Calendar View and then takes the current time since UNIX epoch to calculate the number of seconds that have passed since your birth.

For some reason, when I use: mDatePicker.getDate() I am not returned the number of Milliseconds since UNIX epoch from my selected date like I am led to believe from the android documentation.

I think part of this is because I need to be using an OnDateChangeListener however this only seems to accept in our selected date in Year/Month/Day format rather than Milliseconds since UNIX epoch.

I am using: System.currentTimeMillis(); To get the current time. What is wrong with my approach? How do I get the milliseconds time from the selection on the CalendarView?

1 Answer

J.D. Sandifer
J.D. Sandifer
18,813 Points
J.D. Sandifer
J.D. Sandifer
18,813 Points

From the Java 8 documentation regarding the java.util.Date class:

getDate() Deprecated. As of JDK version 1.1, replaced by Calendar.get(Calendar.DAY_OF_MONTH)

Also:

getTime() Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this Date object.

Perhaps you could find a way to set one Date object to the calendar/birthday date and one to the current date and just subtract birthdayDate.getTime() from currentDate.getTime().