convert String to date but i get today instead

Question

I want to convert a given String from JSON in format "YYYY-MM-DD HH:MM:SS" to a Date so I can convert it to a Calendar and finally get mills from that Specific date and to day. but I just get Today instead of given date

public static String getGameRemainedTime(String date){

        Log.i("TIME", date);

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date convertedDate = new Date();
        try {
            convertedDate = dateFormat.parse(date);
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


        Log.i("TIME", convertedDate+"");

        Calendar game_date = Calendar.getInstance(); 
        game_date.setTime(convertedDate);
        Calendar today = Calendar.getInstance(); 


        long gamedate_stamp = game_date.getTimeInMillis();
        long today_stamp = today.getTimeInMillis();

        Log.i("TIME", today_stamp+"-"+gamedate_stamp);




        long diff = gamedate_stamp - today_stamp;

        long day = diff / (1000 * 24 * 60 * 60 );

        long hour =  (diff -(1000 * 24 * 60 * 60 )) / (1000  * 60 * 60 );

        long mins =  ((diff -(1000 * 24 * 60 * 60 )) / (1000  * 60 * 60 )) / (1000  * 60 );



        Log.i("TIME", day+"-"+hour+"-"+mins);


        return day+"-"+hour+"-"+mins;



    }

plese show sample date that you are receiving it would be nice that way and easier for us to look at your code — Illegal Argument, Jun 14 '14 at 13:17
what does Log.i("TIME", convertedDate+""); printed is printing? — Rod_Algonquin, Jun 14 '14 at 13:18
@Rod_Algonquin I just wanna see if my date it converted or not. and yess it is not converts and this lig always shows to day. — Mahdi, Jun 14 '14 at 13:28
@Kenji what does Log.i("TIME", date); print?? today or specified date? — Rod_Algonquin, Jun 14 '14 at 13:35
@Rod_Algonquin I wanna check if my given Date from JSon is right or not. as you know it is String as begining and yess. it is correct — Mahdi, Jun 14 '14 at 13:39
@Kenji post a sample result of it, I just tried your method and it worked on mine — Rod_Algonquin, Jun 14 '14 at 13:40
you say that you can get the millseconds between today and specific date? — Mahdi, Jun 14 '14 at 14:10
@Rod_Algonquin it's seems that my input string had some additional space that when i removed it, problem is solved. but my today mills is bigger than later date mills . why?! — Mahdi, Jun 14 '14 at 14:18
@Rod_Algonquin what?! 2014-5-14(to day) is grater than 2014-5-21 ?! — Mahdi, Jun 14 '14 at 14:22

Rod_Algonquin · Accepted Answer · 2014-06-14T14:37:39.770

1

You need to subtract the today_date from your specified date that why you are getting wrong results.

try to change this:

 long diff = gamedate_stamp - today_stamp;

to:

 long diff = today_stamp- gamedate_stamp ;

edit:

public static String getGameRemainedTime(String date) throws java.text.ParseException{

    Log.i("TIME", date);

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date convertedDate = new Date();
    try {
        convertedDate = dateFormat.parse(date);
    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }


    Log.i("TIME", convertedDate+"");

    Calendar game_date = Calendar.getInstance(); 
    game_date.setTime(convertedDate);
    Calendar today = Calendar.getInstance(); 


    long gamedate_stamp = game_date.getTimeInMillis();
    long today_stamp = today.getTimeInMillis();

    Log.i("TIME", today_stamp+"-"+gamedate_stamp);




    long diff =  today_stamp - gamedate_stamp;


    long day = diff / (24 * 60 * 60 * 1000); 

    long hour =  diff / (60 * 60 * 1000);

    long mins =  diff / (60 * 1000);;



    Log.i("DAY: ", " " + day);
    Log.i("HOUR: ", " " + hour);
    Log.i("MINUTES", " " + mins);

    return day+"-"+hour+"-"+mins;

}

try this in your oncreate();

getGameRemainedTime("2014-5-16 10:34:22");

result:

06-14 10:37:11.891: I/DAY:(1270):  29
06-14 10:37:11.891: I/HOUR:(1270):  696
06-14 10:37:11.891: I/MINUTES(1270):  41762

edited Jun 14 '14 at 14:37

answered Jun 14 '14 at 14:24

Rod_Algonquin

26,074
6
52
63

so why my remained day, hour and min is wrong. for example today is 2014-5-14 and game date is 2014-5-16. and finnaly my return result is: 148-3546-0 – Mahdi Jun 14 '14 at 14:33
@Kenji your calculation for day and minute is wrong, see my edit – Rod_Algonquin Jun 14 '14 at 14:37
thanks but this is not correct. i wanna get remained time in days and hours and mins not days or hour or mins. – Mahdi Jun 14 '14 at 14:41
@Kenji that is how to get the remained time in days etc. see my result – Rod_Algonquin Jun 14 '14 at 14:42
you say that we have 29 days to 2014-5-16?! it's in two days bro!!no you must substract days and then calculate hours. then substract hours and calculate mins. – Mahdi Jun 14 '14 at 14:54
@Kenji what is your expected result? , because today is 06 not 05 – Rod_Algonquin Jun 14 '14 at 14:56
@Kenji result is (2,48,2939) and i used getGameRemainedTime("2014-6-16 12:00:00"); – Rod_Algonquin Jun 14 '14 at 15:01
@Kenji calculating the day etc. – Rod_Algonquin Jun 14 '14 at 15:10

score 0 · Answer 2 · answered Jun 14 '14 at 13:23

0

Your SimpleDateFormat has a different format from the String you're trying to parse (it's missing the space ' ' after dd. I'm guessing the dateFormat.parse() will throw an exception, so your convertedDate will keep the value assigned with new Date(), which is the date now.

answered Jun 14 '14 at 13:23

Tobias

1,107
7
8

that missing space was just my many trings of many types. I run code first time just like: "yyyy-MM-dd HH:mm:ss" – Mahdi Jun 14 '14 at 13:30

score 0 · Answer 3 · answered Jun 14 '14 at 13:25

0

The format in your code is different form the format you want:

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-ddHH:mm:ss");

and you want this:

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

answered Jun 14 '14 at 13:25

amatellanes

3,645
2
17
19

is my algorytm for calculate remained time is correct? – Mahdi Jun 14 '14 at 14:52

convert String to date but i get today instead

3 Answers3