Develop Reference

How to get android system date and time format in app

How can i get current time format that is set in android. Like it is 12 hrs or 24 hrs. I can easily get date and time and put format on it but i want to get current format of time from android system.

Use the following:
DateFormat.is24HourFormat(context);
Source: https://developer.android.com/reference/android/text/format/DateFormat.html#is24HourFormat(android.content.Context)

If you want to get a String you should use android.text.format.DateFormat
DateFormat dateFormat = android.text.format.DateFormat.getTimeFormat(context);
String = dateFormat.format(new Date());

SQLite Datetime Conversion?

I m developing android application. I need to convert datetime into date. I want to convert '25-07-2013 11:44AM' (datetime) into '25-07-2013' (date).
I am trying this function to convert SELECT date('25-07-2013 11:44AM'), but it was not working.Please suggest some solution for this problem.

According to this page, it does not seem that am/pm times are supported in date SQLite function (this should be noted as h or K according to the date format specification of Java at least; also it is explicitly mentioned %H hour: 00-24). Maybe experiment if using 24 hour clock will not trigger the issue.

I am not sure if you are search for Java code or SQL code , but if it is Java code then solution could be this :
String date = "25-07-2014 11:44AM";
SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
String newDate = dateFormat.format(dateFormat.parse(date));
System.out.println(newDate);
If in case your are looking for SQL code let me know I will share that as well.

System.currentTimeMillis() in android?

i face problem with System.currentTimeMillis() in my project i write some code here where i got problem
Date currentDate = new Date(System.currentTimeMillis());
Log.v("1st",""+currentDate);
Date currentDate = new Date(System.currentTimeMillis()+25*24*60*60*1000);
Log.v("2nd","25th"+currentDate);
it displays current date see in first log but i add 25 days to current date it is in 2nd log but it is not working it displays 2 months back day. it is working very fine in between 1*24*60*60*1000 to 24*24*60*60*1000 days.after 24 it is not working please solve my problem
thanks in advance

25*24*60*60*1000>Integer.MAX_VALUE,
your should write as below:
new Date(System.currentTimeMillis()+25*24*60*60*1000l);

use Calendar instead
Calendar rightNow = Calendar.getInstance()
rightNow.add(Calendar.DAY_OF_YEAR, 25)
and the you can get the date object

You are mixing ints and longs. My java is a little rusty, but try:
Date currentDate = new Date(System.currentTimeMillis()+25L*24L*60L*60L*1000L);

How to add 15 days in String Date in android

I have a problem that I want to add 15 days in my date string but I don't know How to do that? Please help me regarding that.
Thanks in advance

You must parse the date by means of a DateFormat, then use a GregorianCalendar to do the maths:
Date date = DateFormat.getDateFormat(this).parse("12/31/1999");
GregorianCalendar gc = new GregorianCalendar();
gc.setTime(date);
gc.add(Calendar.DAY_OF_MONTH, 15);

You can use the add method. Create a calendar object with the current date. And use the below method.
This should give you an idea
DateFormat objFormatter = new SimpleDateFormat("dd-MM-yyyy");
objCalendar.add(Calendar.DATE, 15);
return objFormatter.format(objCalendarDup.getTime());

Turn it into a java.util.Date and then use either java.util.Calendar or JODA time to do i
it.
A Date isn't a String. Use the types that are available to you. Convert the String into a Date using java.text.DateFormat.

How do I get the time in this format in android?

I am trying to get the present time in this format in an android app. time= "05:09pm 08/02/2011" Right now I am using Calendar c=Calendar.getInstance() and c.getTime() to get the time and its coming out as Tue Aug 23 02:34:25 PDT 2011.
Thanks

You need to use the DateFormat Class
Something like this will get you the current time in the format you desire.
DateFormat.format("hh:mmaa dd/MM/yyyy", System.currentTimeMillis());

Use a SimpleDateFormat.
Format should be like
SimpleDateFormat sdf = new SimpleDateFormat( "HH:mma dd/MM/yyyy" );
sdf.format( yourDate );
Regards,
Stéphane

There are many ways to do that in Android. You can use the SimpleDateFormat wich is a class for formatting and parsing dates. Formatting turns a Date into a String, and parsing turns a String into a Date. Or you can the class Formatter wich is low level but managing the localization is your responsibility.
You may find source code example on the Android javadoc on those classes