Android calendar changing time changing date to today

Question

I am using Calendar and I am able to set date and get date for future. Assume that I have one DatePickerDialog which sets date for example 15-09-2016 and I have one TimePickerDialog which sets hour for example : 22:30

My problem is when I use DatePickerDialog and set date to : 15-09-2016 it's ok. But, then I use TimePickerDialog and try to change time, Calendar's date is changing to today (27-07-2016).

But if I use TimePickerDialog firstly then use DatePickerDialog there is no issue and I am able to set date : 15-09-2016 22:30

I checked Google and Stackoverflow and looked suggested questions when creating this question but i didnt see anything.

My DatePickerDialog :

DatePickerDialog datePickerDialog=
   new DatePickerDialog(thisActivity, new DatePickerDialog.OnDateSetListener() {
       @Override
       public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
          mCalendarAlarm.set(Calendar.YEAR, year);
          mCalendarAlarm.set(Calendar.MONTH, monthOfYear);
          mCalendarAlarm.set(Calendar.DAY_OF_MONTH, dayOfMonth);
          SimpleDateFormat dateformat = new SimpleDateFormat("dd MMM yyyy kk:mm",Locale.getDefault());
          String datetime = dateformat.format(mCalendarAlarm.getTime());
          alarmDate.setText(datetime);
          }}, mCalendarAlarm.get(Calendar.YEAR), mCalendarAlarm.get(Calendar.MONTH),
          mCalendarAlarm.get(Calendar.DAY_OF_MONTH));

datePickerDialog.getDatePicker().setMinDate(mCalendarAlarm.getTimeInMillis());
datePickerDialog.show();

My TimePickerDialog :

TimePickerDialog mTimePicker;
int hour = mCalendarAlarm.get(Calendar.HOUR_OF_DAY);
int minute = mCalendarAlarm.get(Calendar.MINUTE); 
mTimePicker = new TimePickerDialog(thisActivity,mPickerTheme, new TimePickerDialog.OnTimeSetListener() {
   @Override
   public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
       mCalendarAlarm.set(Calendar.HOUR_OF_DAY,selectedHour);
       mCalendarAlarm.set(Calendar.MINUTE,selectedMinute);
       alarmDialogTime.setText(String.format(Locale.getDefault(),"%02d:%02d", selectedHour, selectedMinute));
       }}, hour, minute, true);
mTimePicker.show();

When declaring Calendar :

mCalendarAlarm = Calendar.getInstance();
mCalendarAlarm.setTimeZone(TimeZone.getDefault());

So how can I solve this issue , is there a way or you guys meet this issue before. Thanks for help !

Answer 1

The issue is you are using same calendar object mCalendarAlarm for both TimePicker and DatePicker. Try to use different object of Calendar class for both pickers.

For example:

mCalendarAlarm for DatePicker and create new Calendar object mTimeAlarm for TimePicker

If you have multiple init mCalendarAlarm = Calendar.getInstance(); delete unnecessary inits.