CODEWITHSUNDEEP
javaandroidsimpledateformat
user2795913
user2795913

Reputation: 13

Android SimpleDateFormat going crazy

I'm facing a strange problem using SimpleDateFormat method in Android. Sometimes (very rarely) format method return a bad formatted date. Here is the code and below the output. Can you explain me the cause of that 0s?

Here is the code:

  public class MyObject{

    protected Timestamp detectionDate;

    public String getDetectionDateAsString() {
      String dateAsString =  Constant.ISO_8601_TS_DF.format(detectionDate);
      if(dateAsString.length()>19){
        logger.warn("ERROR ON FORMAT DATE");
        logger.warn("dateAsString:" + dateAsString);
        logger.warn("detectionDate:" + detectionDate);
      }
    }
  }

  public class Constant {

    public static final SimpleDateFormat ISO_8601_TS_DF = 
              new  SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
  }

Output:

14:35:05.150 [AsyncTask #2] WARN  i.m.t.d.o.OutcomesTableData - ERROR ON FORMAT DATE
14:35:05.150 [AsyncTask #2] WARN  i.m.t.d.o.OutcomesTableData - dateAsString:2016-0007-0001 0000:00:0000
14:35:05.151 [AsyncTask #2] WARN  i.m.t.d.o.OutcomesTableData - detectionDate:2016-07-03 12:34:27.194

Thank you

Upvotes: 1

Views: 54

Answers (2)

R. Zagórski
R. Zagórski

Reputation: 20258

The TimeStamp class already returns a string in specified format (look at the field TIME_FORMAT_REGEX in TimeStamp class), so invoking toString() method will return you the string in format you wish.

Upvotes: 0

Ed Holloway-George
Ed Holloway-George

Reputation: 5149

Whilst Timestamp is an extension of Date according to the docs:

The inheritance relationship between Timestamp and java.util.Date really denotes implementation inheritance, and not type inheritance.

To fix your issue, you could try using Calendar instead:

Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(timestamp.getTime());
String format = dateFormat.format(cal.getTime());

Upvotes: 2

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