Develop Reference

Date of last connection in Android studio app

I need the date of the last connection. When I enter again I have to see the last date that I entered in my app.
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
Date date = new Date();
String fecha = dateFormat.format(date);
I have this code but I don't know how to continue.

If I understand your right you can just use System.currentTimeMillis()it looks like this.
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
Date date = new Date(System.currentTimeMillis());
String fecha = dateFormat.format(date);
Then you can save this value everywhere you want

How Get Current time in English in Android?

I want to get current time specifically in English to save it in Database,
to get Current time i use function
private String get_current_Time() {
String CURRENT_TIME_FORMAT = "yyyy_MM_dd_HH_hh_mm_ss_a_MMMM_MMM_EEEE_EE";
return (String) DateFormat.format(CURRENT_TIME_FORMAT, Calendar.getInstance().getTime());
}
but when i set Locale to different language it gives me current time in that language.
for example if i set
conf.setLocale(new Locale("mr"));
it gives me date in marathi. I specifically want it in English. How to do it.
And Also how to change the language of Date once it is saved.I mean if I have saved date in English and while display i want that date to be shown in some other language, how to do it.?

As ADM suggested. new function that worked
public String get_current_Time() {
String CURRENT_TIME_FORMAT = "yyyy_MM_dd_HH_hh_mm_ss_a_MMMM_MMM_EEEE_EE";
SimpleDateFormat dateFormat = new SimpleDateFormat(CURRENT_TIME_FORMAT, Locale.ENGLISH);
return dateFormat.format(Calendar.getInstance().getTime());
}
So now it always returns Date in English

This should fix your issue! Try any of these
here is a simple tutorial
For java.util.Date, just create a new Date()
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
log.d(dateFormat.format(date)); //2016/11/16 12:08:43
For java.util.Calendar, uses Calendar.getInstance()
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Calendar cal = Calendar.getInstance();
log.d(dateFormat.format(cal)); //2016/11/16 12:08:43
For java.time.LocalDateTime, uses LocalDateTime.now()
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
LocalDateTime now = LocalDateTime.now();
log.d(dtf.format(now)); //2016/11/16 12:08:43
For java.time.LocalDate, uses LocalDate.now()
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");
LocalDate localDate = LocalDate.now();
log.d(dtf.format(localDate)); //2016/11/16

Getting the current time and date in the device's defined format

How can I get the current time and date according to phone device format?
my code is
Date date = new Date(System.currentTimeMillis());
SimpleDateFormat dateFormat = new SimpleDateFormat("hh:mm aa",
Locale.ENGLISH);
String var = dateFormat.format(date));
It displays like 2PM instead of 14PM.

You can the device format data and time using
Date date = new Date();
DateFormat dateFormat = android.text.format.DateFormat.getDateFormat(getApplicationContext());
Log.d(TAG,dateFormat.format(date)+");

Use calendar object instead of Date because it is deprecated now and by using caledar object you can get hour in 12 hours formate as
int hour = calendarObject.get(Calendar.HOUR);
for 24 formate as:
int hour = calendarObject.get(Calendar.HOUR_OF_DAY);
for further detail you can visit this

Just change "hh:mm aa" to "HH:mm aa"

How to convert current date time from IST to EST timezone in Android?

How to get the EST timzone date (already convrted and get String) into date format with its Timezone?
I tried with changing timezone and I got the perfect datetime in string format but while I am parsing that String date into date format it gives me local Android system timezone time.
Thanks for any help...in advance.
DateFormat outputFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm aa");
TimeZone tz = TimeZone.getTimeZone("EST");
outputFormat.setTimeZone(tz);
String current_date = outputFormat.format(date);
Date currentdate = outputFormat.parse(current_date);
It give's me EST date format in String (current_date).
It give's me IST format date (currentdate)

You are actually reversing the output from the string back to its original timezone, so when you format the Date from IST to EST it will give you the right specified timezone but by the time you parse it will revert it back to its current timezone the phone is currently using.
solution:
use another instance of SimpleDateFormat and use that to parse the string to prevent it to be reverted back to its current timezone
sample:
Date date = new Date();
SimpleDateFormat outputFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm aa");
TimeZone tz = TimeZone.getTimeZone("IST");
outputFormat.setTimeZone(tz);
String current_date = outputFormat.format(date);
SimpleDateFormat outputFormat2 = new SimpleDateFormat("yyyy-MM-dd hh:mm aa");
Date currentdate = outputFormat2.parse(current_date);

displaying date in edit text android

In my application i have edit text that will show the current date and time initially . If i change the date to some other date and when i tried to use gettext() i am still getting the current date. can anyone help. This is my code to set initial value in edit text
TaskTime = (EditText) findViewById(R.id.txtTaskTime);
Date date = new Date();
java.text.DateFormat dateFormat = android.text.format.DateFormat.getDateFormat(getApplicationContext());
TaskDate.setText(dateFormat.format(date));

Most of the use of date object is obsolete in Android, you should use Calendar : http://developer.android.com/reference/java/util/Calendar.html

Yes, you can get the current date because , Date date = new Date(); this function always returns the current date .
So you need to use the Calendar object to get the current date and time .
Example
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
String strDate = sdf.format(cal.getTime());
Here in dateFormat you have to declare your date format . dateFormat = "dd/MM/yyyy" like .