Develop Reference

calculate 3 months after the date - Android

I want to calculate 4 months after the date I pulled from the database. How can I do that. The output of history is as follows.
Wed Nov 27 14:42:23 GMT+03:00 2019
JSONObject form_tarih2 = jObj.getJSONObject("form_tarih2");
String date = form_tarih2.getString("date");
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
Date calculateDate = sdf.parse(date);

Try this:
JSONObject form_tarih2 = jObj.getJSONObject("form_tarih2");
String date = form_tarih2.getString("date");
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
Date calculateDate = sdf.parse(date);
final Calendar calendar = Calendar.getInstance();
calendar.setTime(calculateDate);
calendar.add(Calendar.MONTH,4);
You can add/sub days, months, year etc according to your need using Calendar

How to get time in GMT from milliseconds

Need to show time in GMT...but it showing in UTC
long m=Long.parseLong("1444588200000");
Date localTime = new Date(m);
Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT"),
Locale.getDefault());
DateFormat date = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss.SSS");
String time = date.format(localTime);
infoip.setText(" "+time);

Try this,
final Date currentTime = new Date();
final SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss.SSS");
// Give it to me in GMT time.
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
System.out.println("GMT time: " + sdf.format(currentTime));

Try like this hope work.
Calendar cal = Calendar.getInstance();
// setting the timezone for which you want
cal.setTimeZone(TimeZone.getTimeZone("GMT"));
cal.setTimeInMillis();
// The date is in your home timezone
Date date = cal.getTime();
TimeZone tz = TimeZone.getTimeZone("GMT");
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss.SSS", Locale.GMT);
sdf.setTimeZone(tz);
// Then we do the conversion to convert the date you provided in milliseconds to the GMT timezone
String result = sdf.parse(date);

How to format date in Android in dd/mm/yy 00:00AM

How to format my date in Android. I have String which gets date in below format
String format = java.text.DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime());
Output
25 Nov 2013 17:39:00
I want this to be converted in below format
dd/mm/yy 5:39PM
I am using below code to get Date. Also how to get that format into String ?

Using SimpleDateFormat class you can do it.
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yy hh:mm");
String format = sdf.format(Calendar.getInstance().getTime());

please try follwing answer
SimpleDateFormat form = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS");
java.util.Date date = null;
try
{
date = form.parse("2011-03-27T09:39:01.607");
}
catch (ParseException e)
{
e.printStackTrace();
}
SimpleDateFormat postFormater = new SimpleDateFormat("MMMMM dd, yyyy");
String newDateStr = postFormater.format(date);

I got it, This has to go like this
Date today = new Date();
SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("dd-MM-yyyy");
String date = DATE_FORMAT.format(today);
DATE_FORMAT = new SimpleDateFormat("dd/MM/yy hh:mm:ss aa");
date = DATE_FORMAT.format(today);

Convert a date and time string according to UTC format

I am having a date string 2012-11-21 13:11:25 which I get from local database. I have to convert this according to UTC settings and display it on a particular screen. So if its GMT+05:30 it should be displayed as 2012-11-21 18:41:25 on the screen. How can I do this conversion. I have checked some of the questions but that didn't work out.
I am able to get a Date object that returns something like Wed Nov 21 13:11:25 GMT+05:30 2012 after this I need to get the time as 18:41:25 and date as 11-21-2012
Thanks in advance

Your df and inputFmt must use the same format.
But I think you should do it like this:
Date myDate = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone("UTC"));
calendar.setTime(myDate);
Date time = calendar.getTime();
SimpleDateFormat outputFmt = new SimpleDateFormat("MMM dd, yyy h:mm a zz");
String dateAsString = outputFmt.format(time);
System.out.println(dateAsString);

Get UTC from current time :
public String getCurrentUTC(){
Date time = Calendar.getInstance().getTime();
SimpleDateFormat outputFmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
outputFmt.setTimeZone(TimeZone.getTimeZone("UTC"));
return outputFmt.format(time);
}

Best way to get formatted string of Date in required format is
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US);
dateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
String formatted = dateFormat.format(date);

//This is my input date
String dtStart = "2019-04-24 01:22 PM";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm a");
Date date = null;
try {
date = format.parse(dtStart);
getDateInUTC(date)
} catch (ParseException e) {
e.printStackTrace();
}
//This Method use for convert Date into some UTC format
public static String getDateInUTC(Date date) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
String dateAsString = sdf.format(date);
System.out.println("UTC" + dateAsString);
return dateAsString;
}

how to convert date format in android

I am getting date into string in YYYY/MM/DD HH:MM:SS format.I want to change it into the mm/dd/yyyy HH:mm:ss and also it will show AM and PM how can I do this.please help me
Thank you

To get AM PM and 12 hour date format use hh:mm:ss a as string formatter WHERE hh is for 12 hour format and a is for AM PM format.
Note: HH is for 24 hour and hh is for 12 hour date format
SimpleDateFormat formatter = new SimpleDateFormat("mm/dd/yyyy hh:mm:ss a");
String newFormat = formatter.format(testDate);
Example
String date = "2011/11/12 16:05:06";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/mm/dd HH:MM:SS");
Date testDate = null;
try {
testDate = sdf.parse(date);
}catch(Exception ex){
ex.printStackTrace();
}
SimpleDateFormat formatter = new SimpleDateFormat("mm/dd/yyyy hh:mm:ss a");
String newFormat = formatter.format(testDate);
System.out.println(".....Date..."+newFormat);

You can use the SimpleDateFormat for the same kinds of any date operations.
SimpleDateFormat sourceFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
SimpleDateFormat DesiredFormat = new SimpleDateFormat("MM/dd/yyyy HH:MM:SS a");
// 'a' for AM/PM
Date date = sourceFormat.parse("2012/12/31 03:20:20");
String formattedDate = DesiredFormat.format(date.getTime());
// Now formattedDate have current date/time
Toast.makeText(this, formattedDate, Toast.LENGTH_SHORT).show();

just use the Time class. Try something similar to this.
Time time = new Time();
time.set(Long.valueOf(yourTimeString));
If you really need a Date object just try this.
Date date = new Date(Long.parse(yourTimeString));

Use android.text.format.Time to the conversion. You can pass the time as text and it will return you the time in desired format by using timeInstance.format("");
you need to provide formatter.
Refer to following:
Time : http://developer.android.com/reference/android/text/format/Time.html
Formatter: http://pubs.opengroup.org/onlinepubs/007908799/xsh/strftime.html
you can use any combination of formatter string to work with it :)

you can use SimpleDateFormat or DateFormat for this here is the example
SimpleDateFormat gsdf = new SimpleDateFormat("YYYY/MM/DD HH:mm:ss");
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss a");
try{
Date d = gsdf.parse("2011/12/13 16:17:00");
System.out.println("new date format " + sdf.format(d));
}catch(Exception){
// handle exception if parse time or another by cause
}

public static String getFormatedDate(String strDate, String sourceFormate,
String destinyFormate) {
SimpleDateFormat df;
df = new SimpleDateFormat(sourceFormate);
Date date = null;
try {
date = df.parse(strDate);
} catch (ParseException e) {
e.printStackTrace();
}
df = new SimpleDateFormat(destinyFormate);
return df.format(date);
}
and use like
getFormatedDate(strDate,
"yyyy-MM-dd HH:mm:ss", "mm/dd/yyyy")