CODEWITHSUNDEEP
androidstringdatecalendaralarmmanager
Karthik
Karthik

Reputation: 1219

How to get time in milliseconds from a string in android?

My app is very simple, it consist of a string variable which consists of both date and time in it, from that string i need to fetch only time and convert it into milliseconds, so that i can pass that milliseconds to alarm manager to trigger alarm.

Here is the code of my MainActivity looks like:

   try {
        String string = "Mon, 10 Mar 2017 03:26:00 p.m.";
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR_OF_DAY, Integer.parseInt(string.substring(17, 19)));
        calendar.set(Calendar.MINUTE, Integer.parseInt(string.substring(20, 22)));
        calendar.set(Calendar.AM_PM, string.contains("a.m.") ? 0 : 1);
        Toast.makeText(getApplicationContext(), "cal: " + calendar.getTime()+ " , milli sec: "+calendar.getTimeInMillis(), Toast.LENGTH_LONG).show();
    } catch (Exception e) {
        Toast.makeText(getApplicationContext(), "exe: " + e, Toast.LENGTH_LONG).show();
    }

when i'm printing calendar.getTime i'm getting both date and time i.e; Tue Mar 14 15:26:45 GMT+05:30 2017, instead of that i need to get 15:26:45 value and convert that value into milli seconds.

Upvotes: 0

Views: 4444

Answers (4)

Shashidhar Mayannavar
Shashidhar Mayannavar

Reputation: 560

Try below code: 

try {
    String string = "Mon, 10 Mar 2017 03:26:00 p.m.";
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, Integer.parseInt(string.substring(17, 19)));
    calendar.set(Calendar.MINUTE, Integer.parseInt(string.substring(20, 22)));
    calendar.set(Calendar.AM_PM, string.contains("a.m.") ? 0 : 1);
    calendar.getTimeInMillis();
    SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
    String time = sdf.format(new Date(calendar.getTimeInMillis()));
    long timeinmili=0;
    try {
        Date date1 = sdf.parse(time);
        timeinmili = date1.getTime();
    } catch (ParseException e) {
        e.printStackTrace();
    }
    System.out.println("Time in Mili Seconds :"+timeinmili );
} catch (Exception e) {
    e.printStackTrace();
}

Upvotes: 0

shmakova
shmakova

Reputation: 6426

Try to use this:

try {
    String string = "Mon, 10 Mar 2017 03:26:00 p.m.";
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR, Integer.parseInt(string.substring(17, 19)));
    calendar.set(Calendar.MINUTE, Integer.parseInt(string.substring(20, 22)));
    calendar.set(Calendar.AM_PM, string.contains("a.m.") ? 0 : 1);
    DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
    Toast.makeText(getApplicationContext(), "cal: " + dateFormat.format(calendar.getTime())+ " , milli sec: "+calendar.getTimeInMillis(), Toast.LENGTH_LONG).show();
} catch (Exception e) {
    Toast.makeText(getApplicationContext(), "exe: " + e, Toast.LENGTH_LONG).show();
}

Upvotes: 1

MurugananthamS
MurugananthamS

Reputation: 2405

Try this

   SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
    sdf.setTimeZone(TimeZone.getTimeZone("UTC"));

    String inputString = "00:01:30.500";

    Date date = sdf.parse("1970-01-01 " + inputString);
    System.out.println("in milliseconds: " + date.getTime());

Upvotes: 0

Harry T.
Harry T.

Reputation: 3527

You can easily use calendar.getTimeInMillis() to get milliseconds.

Upvotes: 0

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