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TimePickerDialog displaying time in 12 hour format

I followed a short YouTube tutorial about TimePickerDialog. Since the video is short, it does not show how to display selected time in a 12-hour format. I want to know how to display it to 12-hour format with PM and AM at the side of the selected time.
This is the code I followed from YT:
TimePickerDialog.OnTimeSetListener onTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
#Override
public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
int hour = selectedHour;
int minute = selectedMinute;
String time = String.format(Locale.getDefault(), "%02d:%02d", hour, minute);
electionsText.setText("Registrations Will End On:\n" + date + "\n# " + time);
}
};
int style = AlertDialog.THEME_HOLO_LIGHT;
TimePickerDialog timePickerDialog = new TimePickerDialog(this, style, onTimeSetListener, hour, minute, false);
timePickerDialog.setTitle("Select Time");
timePickerDialog.show();

#Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Calendar c = Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY, hourOfDay);
c.set(Calendar.MINUTE, minute);
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("KK:mm a");
String currentTime = simpleDateFormat.format(c.getTime());
dateTimeSharedViewModel.setTime(currentTime);
}

java.time
Use the modern java.time classes defined in JSR 310 that years ago supplanted the terrible legacy classes Calendar, Date, SimpleDateFormat.
Generally best to let java.time automatically localize rather than hard-code a format.
LocalTime
.of( hour , minute )
.format(
DateTimeFormatter
.ofLocalizedTime( FormatStyle.SHORT )
.withLocale( Locale.US )
)

You have to replace true instead of false and you're done
final Calendar c = Calendar.getInstance();
int mHour = c.get(Calendar.HOUR_OF_DAY);
int mMinute = c.get(Calendar.MINUTE);
TimePickerDialog.OnTimeSetListener onTimeSetListener = (timePicker, selectedHour, selectedMinute) -> {
int hour = selectedHour;
int minute = selectedMinute;
String time = String.format(Locale.getDefault(), "%02d:%02d", hour, minute);
electionsText.setText("Registrations Will End On:\n" + date + "\n# " + time);
};
TimePickerDialog timePickerDialog = new TimePickerDialog(this, onTimeSetListener, mHour, mMinute, true);
timePickerDialog.setTitle("Select Time");
timePickerDialog.show();

period.getDays() return each time 0 in android

I try to get the correct difference time between the current day and second selected day from the calendar.
I'm using in this case LocalDate and the 3 methods getDays() getMonths() getYears() to get the day and the month also the year:
public int dateDiff(int year,int month,int day) {
final int Day = c.get(Calendar.DAY_OF_MONTH);
final int Month = c.get(Calendar.MONTH);
final int Year = c.get(Calendar.YEAR);
LocalDate localDate1 = LocalDate.of(year,month,day);
LocalDate localDate2 = LocalDate.of(Year,Month,Day);
Period period = Period.between(localDate2,localDate1);
int dayDiff = period.getDays();
return dayDiff;
}
public void onSelectedDayChange(#NonNull CalendarView view, final int year, final int month, final int dayOfMonth) {
textView.setText(""+dateDiff(year, month, day));
}
But each time when I test the code I got in the textView "0"
I try to see the value of the variable "period" and I got (P2M8D 'this result got in my example') that's mean the variable period count the difference between the days and the problem in the methods.
How can I solve this problem?

The problem in this project are in the name of variables, I'm using the same name of current time and the selected time I just change the first letter with capital one but this make problem.
That's why every time when i run the project i got 0
I change the program like that:
public int dateDiff(int year,int month,int day) {
final int dayOfToday = c.get(Calendar.DAY_OF_MONTH);
final int monthOfToday = c.get(Calendar.MONTH);
final int yearOfToday = c.get(Calendar.YEAR);
LocalDate localDate1 = LocalDate.of(year,month,day);
LocalDate localDate2 = LocalDate.of(Year,Month,Day);
Period period = Period.between(localDate2,localDate1);
int dayDiff = period.getDays();
return dayDiff;
}

Here, this should help.
public int dateDiff(int year,int month,int day) {
Calendar thatDay = Calendar.getInstance();
thatDay.set(Calendar.DAY_OF_MONTH,day);
thatDay.set(Calendar.MONTH,month); // 0-11 so 1 less
thatDay.set(Calendar.YEAR, year);
Calendar today = Calendar.getInstance();
long diff = today.getTimeInMillis() - thatDay.getTimeInMillis(); //result in millis
long days = diff / (24 * 60 * 60 * 1000);
return days;
}

To disable every sunday in calendar view in android

How to disable only sunday in the following code?
We cannot find any solution to disable sunday for a month
MainActivity.java:
CalendarView calendarView = (CalendarView) findViewById(R.id.calendarView);
Calendar calendar = Calendar.getInstance();
calendarView.setMinDate(calendar.getTimeInMillis());
calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener()
{
#Override
public void onSelectedDayChange(CalendarView view, int year, int month, int dayOfMonth) {
Toast.makeText(getApplicationContext(), "" + dayOfMonth, 0).show();// TODO Auto-generated method stub`enter code here`
}
});

I have used this code in a project. See if it produces desirable result -
//Global Variables
private Calendar lastSelectedCalendar = null;
private CalendarView calendarView;
//
calendarView = (CalendarView) findViewById(R.id.calendarView);
lastSelectedCalendar = Calendar.getInstance();
calendarView.setMinDate(lastSelectedCalendar.getTimeInMillis() - 1000);
calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
#Override
public void onSelectedDayChange(CalendarView view, int year, int month, int dayOfMonth) {
Calendar checkCalendar = Calendar.getInstance();
checkCalendar.set(year, month, dayOfMonth);
if(checkCalendar.equals(lastSelectedCalendar))
return;
if(checkCalendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY)
calendarView.setDate(lastSelectedCalendar.getTimeInMillis());
else
lastSelectedCalendar = checkCalendar;
}
});

Calendar sunday;
List<Calendar> weekends = new ArrayList<>();
int weeks = 5;
for (int i = 0; i < (weeks * 7) ; i = i + 7) {
sunday = Calendar.getInstance();
sunday.add(Calendar.DAY_OF_YEAR, (Calendar.SUNDAY - sunday.get(Calendar.DAY_OF_WEEK) + 7 + i));
// saturday = Calendar.getInstance();
// saturday.add(Calendar.DAY_OF_YEAR, (Calendar.SATURDAY - saturday.get(Calendar.DAY_OF_WEEK) + i));
// weekends.add(saturday);
weekends.add(sunday);
}
Calendar[] disabledDays = weekends.toArray(new Calendar[weekends.size()]);
dpd.setDisabledDays(disabledDays);
This code disables the next 5 Sundays, if you wish to do it for a longer period, just need to modify week. If you wish to disable Saturdays too, just uncomment those lines.
If you want to do it for previous 5 Sundays then, just modify the for loop to:
for (int i = 0; i < (weeks * 7); i = i + 7) {
for(int j =0; j > (weeks*7) ; j = j - 7);
sunday = Calendar.getInstance();
sunday.add(Calendar.DAY_OF_YEAR, (Calendar.SUNDAY - sunday.get(Calendar.DAY_OF_WEEK) + 7 + i));
// saturday = Calendar.getInstance();
// saturday.add(Calendar.DAY_OF_YEAR, (Calendar.SATURDAY - saturday.get(Calendar.DAY_OF_WEEK) + i));
// weekends.add(saturday);
weekends.add(sunday);
}

When time difference gets calculated the values is off

I have a timepicker for a start time and an end time. It's in Sweden so here is 24 hour clock. If I set the start time at 23:00 and the end time at 02:00 it should be 3 hours difference. But in this case its 22 hours.
I calculate the difference lite this:
String a =""+Math.abs(diff/(60*60*1000)%24);
String b =""+Math.abs(diff/(60*1000)%60);
How can this be fixed?
UPDATE
Here is some more code:
DateFormat formatter = new SimpleDateFormat("HH:mm");
Date date1 = formatter.parse(str_time1);
Date date2 = formatter.parse(str_time2);
long diff = date2.getTime() - date1.getTime();
String a =""+Math.abs(diff/(60*60*1000)%24);
String b =""+Math.abs(diff/(60*1000)%60);
UPDATE 2
Here is my timepickerdialog and maybe the error start even here:
final Calendar c = Calendar.getInstance();
mHour = c.get(Calendar.HOUR_OF_DAY);
mMinute = c.get(Calendar.MINUTE);
// Launch Time Picker Dialog
final TimePickerDialog timePickerDialog = new TimePickerDialog(this,
new TimePickerDialog.OnTimeSetListener() {
#Override
public void onTimeSet(TimePicker view, int hourOfDay,
int minute) {
startworkFrom.setText(hourOfDay + ":" + minute);
}
}, mHour, mMinute, true);
timePickerDialog.show();

Here is a solution to the problem I had:
public int theTimeMachineHours(EditText a, EditText b) throws Exception{
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm");
Date startDate = simpleDateFormat.parse(a.getText().toString());
Date endDate = simpleDateFormat.parse(b.getText().toString());
long difference = endDate.getTime() - startDate.getTime();
if(difference<0)
{
Date dateMax = simpleDateFormat.parse("24:00");
Date dateMin = simpleDateFormat.parse("00:00");
difference=(dateMax.getTime() -startDate.getTime() )+(endDate.getTime()-dateMin.getTime());
}
int days = (int) (difference / (1000*60*60*24));
int hours = (int) ((difference - (1000*60*60*24*days)) / (1000*60*60));
int min = (int) (difference - (1000*60*60*24*days) - (1000*60*60*hours)) / (1000*60);
return hours;
}

this might help:
result_time = (end_time - start_time +24) % 24;
// +24 to avoid the result from going to negative
where end_time is your ending time i.e 02:00
start_time is starting time i.e 23:00
and % is modulo operator

Try using kk:mm instead HH:mm
So change the code to:
DateFormat formatter = new SimpleDateFormat("kk:mm");

Setting upper and lower date limits to date picker dialog

I have created an activity in which there is a field for inserting birth date of the user. I have used a date picker to achieve this.
This is the source code of what I am doing:
// onclick dob edittext open date picker dialog
dob.setFocusableInTouchMode(false);
dob.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//open date picker
showDialog(DATE_DIALOG_ID);
}
});
//======================For picking birth day==========================
// Creating dialog
#Override
protected Dialog onCreateDialog(int id) {
Calendar c = Calendar.getInstance();
int cyear = c.get(Calendar.YEAR);
int cmonth = c.get(Calendar.MONTH);
int cday = c.get(Calendar.DAY_OF_MONTH);
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this, mDateSetListener, cyear, cmonth, cday);
}
return null;
}
private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
// onDateSet method
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
// String date_selected = String.valueOf(monthOfYear+1)+" /"
// +String.valueOf(dayOfMonth)+" /"
// +String.valueOf(year);
String date_selected = String.valueOf(dayOfMonth)+" /"
+String.valueOf(monthOfYear+1)+" /"
+String.valueOf(year);
//Toast.makeText(RegisterActivity.this, "Selected Date is ="+date_selected, Toast.LENGTH_SHORT).show();
dob.setText(date_selected);
}
};
//======================For picking birth day==========================
Now what I want to do is, to limit the date picker to particular year.
Like this:
int maxYear = c.get(Calendar.YEAR) - 15; // this year ( 2013 ) - 15 = 1998
int maxMonth = c.get(Calendar.MONTH);
int maxDay = c.get(Calendar.DAY_OF_MONTH);
int minYear = maxYear-49;
int minMonth = 0; // january
int minDay = 25;
What should I do to set the above mentioned bounding to the date picker?
//----------------Edit---------------------------
I have done something like this:
//======================For picking birth day==========================
// Creating dialog
#Override
protected Dialog onCreateDialog(int id) {
Calendar c = Calendar.getInstance();
maxYear = c.get(Calendar.YEAR) - 15; // this year ( 2013 ) - 15 = 1998
maxMonth = c.get(Calendar.MONTH);
maxDay = c.get(Calendar.DAY_OF_MONTH);
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this, mDateSetListener, maxYear, maxMonth, maxDay);
}
return null;
}
DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
int minYear = maxYear-49;
int minMonth = 0; // january
int minDay = 25;
public void onDateChanged(DatePicker view, int year, int monthOfYear,int dayOfMonth) {
Date current = new Date(year, monthOfYear, dayOfMonth);
Date minDate = new Date(minYear, minMonth, minDay);
Date maxDate = new Date(maxYear, maxMonth, maxDay);
if( current.getTime() < minDate.getTime() )
{
//set to minimum date
}else if( current.getTime() > maxDate.getTime() )
{
//Set to max Date
}
}
#Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
String date_selected = String.valueOf(dayOfMonth)+" /"
+String.valueOf(monthOfYear+1)+" /"
+String.valueOf(year);
//Toast.makeText(RegisterActivity.this, "Selected Date is ="+date_selected, Toast.LENGTH_SHORT).show();
dob.setText(date_selected);
}
};
//======================For picking birth day==========================
This is fixing the upper limit, but the lower limit or the minDate is not getting fixed! What is to be done?

Set OnDateChangedListener() For you DatePicker and inside onDateChanged function if the date set is greater than the decide limit if so DatePicker.updateDate(minYear, minMonth, minDay); use this method to reset it.
Date minDate = new Date(1990, 10, 25);
Date maxDate = new Date(2013, 4, 15);
OnDateChangedListener listener = new OnDateChangedListener() {
#Override
public void onDateChanged(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
Date current = new Date(year, monthOfYear, dayOfMonth);
if( current.getTime() < minDate.getTime() )
{
//set to minimum date
}else if( current.getTime() > maxDate.getTime() )
{
//Set to max Date
}
}
};
YourDatePicker.init(2013, 4, 15, listener);