android - How to convert firebase timestamp into date and time

Question

I have tried to get date and time from firebase timestamp as follows:

 Date date=new Date(timestamp*1000);
 SimpleDateFormat sfd = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
 sfd.format(date);

but I'm getting results like:

:02-02-48450 04:21:54
:06-02-48450 10:09:45
:07-02-48450 00:48:35

as you can see the year is not as we live.

So, please help me to fix this.

Answer 1

Your timestamp 1466769937914 equals to 2016-06-24 12:05:37 UTC. The problem is that you are multiplying the timestamp by 1000. But your timestamp already holds a value in milliseconds not in seconds (this false assumption is most likely the reason you have the multiplication). In result you get 1466769937914000 which converted equals to 48450-02-01 21:51:54 UTC. So technically speaking all works fine and results you are getting are correct. All you need to fix is your input data and the solution is quite simple - just remove the multiplication:

SimpleDateFormat sfd = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
sfd.format(new Date(timestamp));