Android: How to Change the Datepicker View Date Format from Mm/Dd/Yyyy to Dd/Mm/Yyyy

Android: How to change the DatePicker view date format from MM/dd/yyyy to dd/MM/yyyy?

To override the DatePicker format the best bet would be to override one of its constructors with a slight edit to the original code. You can edit the ViewGroup in code for you but I'd seriously consider not doing it that way.

1. Create class LocalizedDatePicker
2. Override public DatePicker (Context context, AttributeSet attrs, int defStyle) http://developer.android.com/reference/android/widget/DatePicker.html#DatePicker(android.content.Context, android.util.AttributeSet, int)
3. Copy the code from the original DatePicker constructor (you may need to select a different branch after some testing, I have linked the head)
4. Override methods that call reorderSpinners() to remove that call.
5. Replace line inflater.inflate(R.layout.date_picker, this, true); with inflater.inflate(my.package.R.layout.localized_date_picker, this, true);
6. Copy the original date_picker.xml layout to your local resource localized_date_picker.xml
7. Edit the file for the desired order, since you're editing this please respect the localization of other places and keep a copy of the original in your global layout folder and put the localized_date_picker.xml in your region specific folder. Since the system's layout is Month Day Year people in other places may expect that order.

How to change the format of Material Date Picker in YYY.MM-DD

The addOnPositiveButtonClickListener listener returns the selected date as Long value.

Don't use the HeaderText.

    start_DatePicker.addOnPositiveButtonClickListener(new MaterialPickerOnPositiveButtonClickListener<Long>() {
        @Override public void onPositiveButtonClick(Long selection) {
            Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
            calendar.setTimeInMillis(selection);
            SimpleDateFormat format = new SimpleDateFormat("yyyy MM dd");
            String formattedDate  = format.format(calendar.getTime());

        }
    });

    

Android format date to MM-DD-YYYY from Datepicker

Check this:

date format change in datepicker and calendar

   year = calendar.get(Calendar.YEAR);
   month = calendar.get(Calendar.MONTH);
   day = calendar.get(Calendar.DAY_OF_MONTH);

    if(month < 10){

        month = "0" + month;
    }
    if(day < 10){

        day  = "0" + day ;
    }
    searchText.setText(day + "-" + month + "-" + year);

Android Material Date Picker Date Format

The addOnPositiveButtonClickListener listener returns the selected date as Long value. In this way you have a long value and not a String.

You can use:

    MaterialDatePicker<Long> materialDatePicker = builder.build();
    
    materialDatePicker.addOnPositiveButtonClickListener(new MaterialPickerOnPositiveButtonClickListener<Long>() {
        @Override
        public void onPositiveButtonClick(Long selection) {
           //....
           Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
           calendar.setTimeInMillis(selection);
           SimpleDateFormat format = new SimpleDateFormat("yyyy MM dd");
           String formattedDate  = format.format(calendar.getTime());
        }
    });

In kotlin:

materialDatePicker.addOnPositiveButtonClickListener {
    val utc = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
    utc.timeInMillis = it
    val format = SimpleDateFormat("yyyy-MM-dd")
    val formatted: String = format.format(utc.time)        
}

Android Date Picker Dialog- Date Format in dd/MMM/yyyy

You could add a method like this one

private static String formatDate(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/MMM/yyyy");

    return sdf.format(date);
}

And then change one line in your code:

itt.setText(formatDate(yrr, monn, dayy));

Change date format of the DatePickerDialog Calendar in Android

Not sure what you would like to achieve, but you could use a Calendar instance with SimpleDateFormat to format your Date according to your needs.

For example:

public void onDateSet(DatePicker view, int year, int month, int day) {
    Calendar calendar = Calendar.getInstance();
    calendar.set(year, month, day);

    SimpleDateFormat dateFormat = new SimpleDateFormat("dd:MM:yyyy");

    String dateString = dateFormat.format(calendar.getTime());

    TextView textview = (TextView)getActivity().findViewById(R.id.textView1);
    textview.setText(dateString);
}

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