Develop Reference

How to set alarm manager using date and time from Textview

I am converting a timestamp into date and time and setting the result on a textview.
For example 1443884578 is Sat 3 October 2015 18:02
I would like to set the above date and time into an alarm manager.After research i found a code that uses a date time picker.
public void onDateSelectedButtonClick(View v) {
// Get the date from our datepicker
int day = picker.getDayOfMonth();
int month = picker.getMonth();
int year = picker.getYear();
// Create a new calendar set to the date chosen
// we set the time to midnight (i.e. the first minute of that day)
Calendar c = Calendar.getInstance();
c.set(year, month, day);
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
// Ask our service to set an alarm for that date, this activity talks to the client that talks to the service
scheduleClient.setAlarmForNotification(c);
// Notify the user what they just did
Toast.makeText(this, "Notification set for: " + day + "/" + (month + 1) + "/" + year, Toast.LENGTH_SHORT).show();
}
However its getting only the date and fires the alarm the minute the date occurs.
PROBLEM: I would like to get the date and time from my textview and skip this date time picker in the format i have. Is this possible?

String input = "Sat October 3 2015 18:02"; // Instead of String input = "Mon Feb 06 2015";
Calendar cal = Calendar.getInstance();
Date date = new Date();
// Changed the format to represent time of day
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss", Locale.ENGLISH);
try {
date = sdf.parse(input);
} catch (ParseException e) {
e.printStackTrace();
}
cal.setTime(date);
//We haven't parsed the seconds from the original date so this will result
//in 18:02:00 - 10seconds.
//For a correct calculation, you could parse the seconds as well
//See SimpleDateFormat above, but you would have to provide the original date
//with seconds as well
cal.add(Calendar.SECOND, -10);
scheduleClient.setAlarmForNotification(cal);

How to get total number of months from a specific Date?

I am new to Android.I have a requirement, I have a field to enter the Date Of Birth of a person.On successful selection I wanna return the total number of months from the DOB to current date.For example, if I entered DOB as 19/10/2012 I wanna return 36(months).I searched for this, but didn't find anything suitable to my requirement.Here is my current code which return sucessful data,
private void showDate(int year, int month, int day) {
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(0);
cal.set(year, month, day);
Date date = cal.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
if(System.currentTimeMillis() > date.getTime()) {
edtDate.setText(sdf.format(date));
LocalDate date1 = new LocalDate(date);
LocalDate date2 = new LocalDate(new java.util.Date());
PeriodType monthDay = PeriodType.yearMonthDayTime();
Period difference = new Period(date1, date2, monthDay);
int months = difference.getMonths();
months=months + 1;
System.out.println("16102015:Nunber of Months"+months);
}else{
Toast.makeText(mActivity,getResources().getString(R.string.date_validationmsg),Toast.LENGTH_LONG).show();
}
}

Calendar startCalendar = new GregorianCalendar();
startCalendar.setTime(startDate);
Calendar endCalendar = new GregorianCalendar();
endCalendar.setTime(endDate);
int diffYear = endCalendar.get(Calendar.YEAR) - startCalendar.get(Calendar.YEAR);
int diffMonth = diffYear * 12 + endCalendar.get(Calendar.MONTH) - startCalendar.get(Calendar.MONTH);

To start with, I'd suggest using LocalDate instead of DateTime for the computations. Ideally, don't use java.util.Date at all, and take your input as LocalDate to start with (e.g. by parsing text straight to that, or wherever your data comes from.) Set the day of month to 1 in both dates, and then take the difference in months:
private static int monthsBetweenDates(LocalDate start, LocalDate end) {
start = start.withDayOfMonth(1);
end = end.withDayOfMonth(1);
return Months.monthsBetween(start, end).getMonths();
}
UPDATE 1
see this link the OP is accepted the same answer because Months.monthsBetween() method is not working proper for him
UPDATE 2
LocalDate userEnteredDate = LocalDate.parse( new SimpleDateFormat("yyyy-MM-dd").format(date));
LocaleDate currentDate = LocalDate.parse( new SimpleDateFormat("yyyy-MM-dd").format(new Date()));
int months = monthsBetweenDates(userEnteredDate, currentDate)

Using Joda-time library here, I was able to get the desired result.
Try the below code it would give the desired the difference in months.
DateTime date1 = new DateTime().withDate(2012, 10, 19);
DateTime today = new DateTime().withDate(2015, 10, 19);
// calculate month difference
int diffMonths = Months.monthsBetween(date1.withDayOfMonth(1), today.withDayOfMonth(1)).getMonths();

Using JodaTime, it's really easy:
http://www.joda.org/joda-time/apidocs/
int nMonths = new Period(startTime, endTime).getMonths();

Use this code to calculate months between two dates
public static int monthsBetweenUsingJoda(Date d1, Date d2) {
return Months.monthsBetween(new LocalDate(d1.getTime()), new LocalDate(d2.getTime())).getMonths();
}

Date object from simple string - Java and Android [duplicate]

This question already has answers here:
How to get the day, year, hours, min Individually from date format "yyyy-MM-dd'T'HH:mm:ss.SSSZ"?
(4 answers)
Closed 9 years ago.
specific date is "2013-11-12".
I want to extract day, month and year from above date. Please let me know how can I extract?

You can use split().
Example :
String mydate="2013-11-12"; //year-month-day
String myyear=mydate.split("-")[0]; //0th index = 2013
String mymonth=mydate.split("-")[1]; //1st index = 11
String myday=mydate.split("-")[2]; //2nd index = 12

you can use substring method to extract the particular characters from the above string like:
String year=date.substring(0,4); //this will return 2013
String month=date.substring(5,7); //this will return 11
String day=date.substring(8,10); //this will return 12

You can also use Calendar
Calendar calendar = Calendar.getInstance();
calendar.setTime(new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH).parse("2013-11-12"));
int day = calendar.get(Calendar.DAY_OF_MONTH);
int month = calendar.get(Calendar.MONTH);
int year = calendar.get(Calendar.YEAR);

You can do it using SimpleDateFormat and Calendar Class.
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy");
cal.setTime(sdf.parse("Mon Mar 14 16:02:37 GMT 2011"));// all done
Now you can use this cal Object to do whatever you want. Not just the date, month or year. you cam use it to perform various operations, such as add month, add year etc...

Create date object from your date string first, like...
String yourDateString = "2013-11-12";
SimpleDateFormat parser = new SimpleDateFormat("yyyy-MM-dd");
Date yourDate = parser.parse(yourDateString);
Now create Calender instance to get further information about date...
Calendar calendar = Calendar.getInstance();
calendar.setTime(yourDate);
int months = calendar.get(Calendar.DAY_OF_MONTH);
int seconds = calendar.get(Calendar.SECOND);
// and similarly use calender.getXXX
Hope this helps...

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date testDate = null;
try {
testDate = sdf.parse("2013-11-12");
}
catch(Exception ex) {
ex.printStackTrace();
}
int date= testDate.getDate();
int month = testDate.getMonth();
int year = testDate.getYear();

To get Date and time from Timestamp Android

I want to get time and date separately from timestamp.Please help me in these. My example of timestamp is 1378798459.
Thanks

//Try the following
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
String dateString = formatter.format(new Date(Long.parseLong(YOUR TIMESTAMP VALUE)));
txtDate.setText(dateString);
//You can put your needed format here:
SimpleDateFormat formatter = new SimpleDateFormat("YOUR REQUIRED FORMAT");

Try this is working with me
public String getDateCurrentTimeZone(long timestamp) {
try{
Calendar calendar = Calendar.getInstance();
TimeZone tz = TimeZone.getDefault();
calendar.setTimeInMillis(timestamp * 1000);
calendar.add(Calendar.MILLISECOND, tz.getOffset(calendar.getTimeInMillis()));
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date currenTimeZone = (Date) calendar.getTime();
return sdf.format(currenTimeZone);
}catch (Exception e) {
}
return "";
}

Improving upon the answer given by Pratik Dasa
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
Here you can get various formats using the following syntax. You can play around with it by deleting or adding terms given below in the syntax.
Date and Time Pattern Result
----------------------------- ---------------------------------
"yyyy.MM.dd G 'at' HH:mm:ss z" 2001.07.04 AD at 12:08:56 PDT
"EEE, MMM d, ''yy" Wed, Jul 4, '01
"h:mm a" 12:08 PM
"hh 'o''clock' a, zzzz" 12 o'clock PM, Pacific Daylight Time
"K:mm a, z" 0:08 PM, PDT
"yyyyy.MMMMM.dd GGG hh:mm aaa" 02001.July.04 AD 12:08 PM
"EEE, d MMM yyyy HH:mm:ss Z" Wed, 4 Jul 2001 12:08:56 -0700
"yyMMddHHmmssZ" 010704120856-0700
"yyyy-MM-dd'T'HH:mm:ss.SSSZ" 2001-07-04T12:08:56.235-0700
"yyyy-MM-dd'T'HH:mm:ss.SSSXXX" 2001-07-04T12:08:56.235-07:00
"YYYY-'W'ww-u" 2001-W27-3

String time = DateUtils.formatDateTime(this, 1378798459, DateUtils.FORMAT_SHOW_TIME);
String date = DateUtils.formatDateTime(this, 1378798459, DateUtils.FORMAT_SHOW_DATE);

Try this,
final Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
Date date = cal.getTime();
mHour = date.getHours();
mMinute = date.getMinutes();

Only that:
long timestampString = Long.parseLong("yourString");
String value = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").
format(new java.util.Date(timestampString * 1000));

long dv = Long.valueOf(timestamp_in_string)*1000;// its need to be in milisecond
Date df = new java.util.Date(dv);
String vv = new SimpleDateFormat("MM dd, yyyy hh:mma").format(df);
From here.

you can use this
Long tsLong = System.currentTimeMillis();
String ts = tsLong.toString();
long millisecond = Long.parseLong(ts);
datetimeString = DateFormat.format("MM-dd-yyyy hh:mm:ss a", new Date(millisecond)).toString();
timeString = datetimeString.substring(11);
dateString = datetimeString.substring(0,10);
String t2 = datetimeString.substring(20,21);
The datetimeString contains the Date Time AM/PM data
timeString will give you the substring which contains the time only and the dateString is substring for date
The String t2 will give you whether it is AM or PM in the clock

int day, month, year;
int second, minute, hour;
GregorianCalendar date = new GregorianCalendar();
day = date.get(Calendar.DAY_OF_MONTH);
month = date.get(Calendar.MONTH);
year = date.get(Calendar.YEAR);
second = date.get(Calendar.SECOND);
minute = date.get(Calendar.MINUTE);
hour = date.get(Calendar.HOUR);
String data =(hour+ ':'+ ""+minute+ ':'+"" +second+"" +""+"" +day+"" +"/" +(month+1)+"" +"/"+ +year);
Toast.makeText(getActivity(), "Time stamp:"+data,Toast.LENGTH_LONG).show();

DateFormat dateFormat = DateFormat.getDateTimeInstance();
when.setText(dateFormat.format(new Date(timestamp * 1000)));
The timestamp is multiplied by 1000 for converting the seconds into milliseconds.

All the answers are great and they mainly focus on converting the unix timestamp to milliseconds first, which is correct.
I struggled to apply that because I must use 1000L in the conversion (instead of 1000 only). Here's my working code with time zone conversion
// Set TimeZone
SimpleDateFormat dateFormat = new SimpleDateFormat("MM-dd-yy h:mm a", Locale.US);
dateFormat.setTimeZone(getDeviceTimeZone());
// Set time
Date date = new Date(timestamp * 1000L);
return dateFormat.format(date);
For Android API 26 and above, you can just do
return Instant.ofEpochSecond( timestamp )
.atZone(ZoneId.of( timezone ))
.toLocalDateTime()
.toString();

The very best way to get day and date from the timestamp is that:
java.util.Date dayAndDate = new java.util.Date( (long) yourTimeStamp * 1000);
// object coming as like: Tue Feb 09
String day = dayAndDate.toString().split(" ")[0];
String month = dayAndDate.toString().split(" ")[1];
String date = dayAndDate.toString().split(" ")[2];
I hope you will like my approach, if you have liked it, don't forget to give it an upvote, so that others will consider it.

If you want to use time like in a WhatsApp message, You can use this method,
public static String millisToDateChat(long time) {
long currentTime = System.currentTimeMillis();
long defe = currentTime - time;
long time_in;
if(time!=0){
time_in = time;
}else{
time_in = currentTime;
defe = 0;
}
int s = (int)defe/1000;
int m = (int)defe/(1000*60);
int h = (int)defe/(1000*60*60);
int d = (int)defe/(1000*60*60*24);
int w = (int)defe/(1000*60*60*24*7);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(time_in);
Date date = calendar.getTime();
#SuppressLint("SimpleDateFormat") String formattedDate=(new SimpleDateFormat("HH:mm")).format(date);
#SuppressLint("SimpleDateFormat") String formattedYear=(new SimpleDateFormat("MMM d, ''yy")).format(date);
#SuppressLint("SimpleDateFormat") String formattedm=(new SimpleDateFormat("MMM d")).format(date);
if(d>365) {
return formattedYear;
}else if(s>172000){
return formattedm;
}else if(s>86400) {
return "Yest.";
}else{
return formattedDate;
}
}

Android CalendarView: How do I get the date in correct format?

The past few days I've been searching for ways to get a 'readable' date out of my calendarview from android 4.0. I can't manage to find a solution or example that suits my problem. I did get it in miliseconds but not in a date format.
My problem is: I have a calendarview and I want the selected date by the user, shown in logcat in a dateformat yy-mm-dd.
I was used to the datepicker from android 2.2 and I'm not familiar with calendarview and can't find much about it either. Does anyone know a solution for this?

Okay so here is how to do this. When you fire your calendarview activity or a calendarview inside your activity it sets the date to the current date(meaning today). To get this current date just use the Calendar object provided by the java api to get this date example below:
Calendar date = Calendar.getInstance();
// for your date format use
SimpleDateFormat sdf = new SimpleDateFormat("yy-MM-dd");
// set a string to format your current date
String curDate = sdf.format(date.getTime());
// print the date in your log cat
Log.d("CUR_DATE", curDate);
to get a date changed you must do this
CalendarView myCalendar = (CalendarView) findViewById(R.id.myCalenderid);
myCalendar.setOnDateChangeListener(myCalendarListener);
OnDateChangeListener myCalendarListener = new OnDateChangeListener(){
public void onSelectedDayChange(CalendarView view, int year, int month, int day){
// add one because month starts at 0
month = month + 1;
// output to log cat **not sure how to format year to two places here**
String newDate = year+"-"+month+"-"+day;
Log.d("NEW_DATE", newDate);
}
}

kandroidj's answer helps to create date, but not date of correct format.
So to format selected date:
calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
#Override
public void onSelectedDayChange(CalendarView view, int year, int month,
int dayOfMonth) {
final SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
Calendar calendar = Calendar.getInstance();
calendar.set(year, month, dayOfMonth);
String sDate = sdf.format(calendar.getTime());
Log.d(TAG, "sDate formatted: " + sDate);
}
});

You should use SimpleDateFormat
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
String selectedDate = sdf.format(new Date(calendar.getDate()));

long date = calenderView.getDate();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(date);
int Year = calendar.get(Calendar.YEAR);
int Month = calendar.get(Calendar.MONTH);
int Day = calendar.get(Calendar.DAY_OF_MONTH);
//customize According to Your requirement
String finalDate=Year+"/"+Month+"/"+Day;