How do I solve this issue faced in datepicker dialog in android?

Question

Possible Duplicate:
Calculating the difference between two Java date instances

Please do help me. I'm finding the difference between two dates and everything is fine if the start date and end date are in the same month.. but if I chose today's date as the start date and February 1st as the end date. It shows there difference as 1(one).

I was just querying about what went wrong in my own code being a newbie in android. So I cant understand why this question is closed.

public void showStartDate(View v) {
        DialogFragment newFragment = new DatePickerFragment();
        newFragment.show(getFragmentManager(), "startDate");

    }

    public void showEndDate(View v){
        DialogFragment newFragment = new DatePickerFragment();
        newFragment.show(getFragmentManager(), "endDate");
    }
    public class DatePickerFragment extends DialogFragment
    implements DatePickerDialog.OnDateSetListener /*,OnDateChangedListener*/{

        @Override 
   public Dialog onCreateDialog(Bundle savedInstanceState) {
  // Use the current date as the default date in the picker
     final Calendar c = Calendar.getInstance();
     int year = c.get(Calendar.YEAR);
     int month = c.get(Calendar.MONTH);
     int day = c.get(Calendar.DAY_OF_MONTH);

     //Toast.makeText(getApplicationContext(),""+ day+"-"+month+1+"-"+year,5).show(); 
    // Create a new instance of DatePickerDialog and return it
    return new DatePickerDialog(getActivity(), this, year, month, day);
   }

    public void onDateSet(DatePicker view, int year, int month, int day) {
    // Do something with the date chosen by the user
        int mon=month+1;
        Date strtdate,enddate;
        DatePickerDialog d = new DatePickerDialog(getActivity(), this, year, mon, day);

        if(getTag() == "startDate")
        {
            String dd_s = null,mm_s = null;
            Date old_d;
            start_date_dp_btn = (Button)findViewById(R.id.btn_dp_strt_date);
            if(day<10)
            {
                dd_s = "0"+day;
            }
            else
            {
                dd_s = day+"";
            }
            if(mon<10)
            {
                mm_s = "0"+mon;
            }
            else
            {
                mm_s = mon+"";
            }
            start_date_dp_btn.setText(dd_s+"-"+mm_s+"-"+year);
            Toast.makeText(getApplicationContext(),""+ day+"-"+mon+"-"+year,5).show();

            c1 = Calendar.getInstance();

            c1.set(year, mon, day, hr1, min1);
            ms1 = c1.getTimeInMillis(); 

            long date2 = ms1/(1000*60*60*24);
            Log.i("Start date", ""+date2);

        }
        if(getTag() == "endDate")
        {
            String dd_e = null,mm_e = null;
            end_date_dp_btn = (Button)findViewById(R.id.btn_dp_end_date);
            if(day<10)
            {
                dd_e = "0"+day;
            }
            else
            {
                dd_e = day+"";
            }
            if(mon<10)
            {
                mm_e = "0"+mon;
            }
            else
            {
                mm_e = mon+"";
            }
            end_date_dp_btn.setText(dd_e+"-"+mm_e+"-"+year);

            c2 = Calendar.getInstance();
            c2.set(year, mon, day, hr2, min2);
            ms2 = c2.getTimeInMillis();

            long date2 = ms2/(1000*60*60*24);
            Log.i("End date", ""+date2);
            long date1 = ms1/(1000*60*60*24);
            diff = (ms2-ms1)/(1000*60*60*24);

            long difference = date2 - date1;//(strtdate.getTime() - enddate.getTime())/1000*60*60*24;
            Log.i("difference", ""+difference);
            if(difference>0)//(ms2/1000*60*60)>(ms1/1000*60*60))//diff>0)
            {  
               long num = difference+1;//((ms2/1000*60*60)-(ms1/1000*60*60))+1;//((ms2-ms1)/1000*60*60*24)+1;
               event_days_ed = (EditText)findViewById(R.id.ed_days_event);
               event_days_ed.setText((num)+"");
               save_btn.setEnabled(true);
            }
            else if(difference==0)
            {
                event_days_ed = (EditText)findViewById(R.id.ed_days_event);
                event_days_ed.setText((difference+1)+"");
                save_btn.setEnabled(true);
            }
            else if(difference<0 )//||(ms2<ms1))//difference<0)
            {   
                event_days_ed = (EditText)findViewById(R.id.ed_days_event);
                event_days_ed.setText("Check your end date");
                save_btn.setEnabled(false);
            }

        }
  }

looks like you have unnecessarily complicated the code, otherwise difference between the two dates are pretty simple — Shaista Naaz, Jan 29 '13 at 06:47

score 1 · Accepted Answer · edited May 23 '17 at 12:21

1

See This & this

Also There is a library Joda to deal with date and time . Refer This for details

edited May 23 '17 at 12:21

Community

1
1

answered Jan 29 '13 at 07:12

edwin

7,985
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glad you solve your issue – edwin Jan 29 '13 at 08:30

score 0 · Answer 2 · answered Jan 29 '13 at 06:49

Try this,

 private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {

    public void onDateSet(DatePicker view, int myear, int monthOfYear,
            int dayOfMonth) {
        try {
            selectedDate = new SimpleDateFormat("yyyy/MM/dd").parse(myear
                    + "/" + monthOfYear + "/" + dayOfMonth);
            String.valueOf(year + monthOfYear + dayOfMonth);
            calender();
            currDate = new Date();

            month = monthOfYear;
            day = dayOfMonth;
            year = myear;
            currentdate = currDate.getDay();
            currentmonth = currDate.getMonth();
            currentyear = currDate.getYear();
            String.valueOf(currentyear + currentmonth + currentdate);

            selectedDate.after(currDate);
            selectedDate.before(currDate);

            if ((month >= mMonth && day >= mDay && year >= mYear)
                    || (month == mMonth && day == mDay && year == mYear)) {
                if ((day > mDay) || (day == mDay)) {
                    a = selectedDate.toString();

                    mYear = year;
                    mMonth = monthOfYear;
                    mDay = dayOfMonth;
                    updateDisplay();

                } else if (day < mDay) {

                    Toast.makeText(getApplicationContext(),
                            "Kindly enter valid date", Toast.LENGTH_SHORT)
                            .show();
                    mDateDisplay.setText(currDate.getDate());

                }
            } else if (year < mYear) {
                if (month > mMonth && month == mMonth && month < mMonth) {
                    Toast.makeText(getApplicationContext(),
                            "Kindly enter valid date", Toast.LENGTH_SHORT)
                            .show();
                    mDateDisplay.setText(currDate.getDate());
                }

            } else if (month < mMonth) {
                if (day <= mDay || day >= mDay) {
                    Toast.makeText(getApplicationContext(),
                            "Kindly enter valid date", 100).show();
                    mDateDisplay.setText(currDate.getDate());
                }
            } else if (month > mMonth) {
                if (day <= mDay || day >= mDay) {
                    a = selectedDate.toString();

                    mYear = year;
                    mMonth = monthOfYear;
                    mDay = dayOfMonth;
                    updateDisplay();

                    calender();
                }
            }

            else if (month <= mMonth && day <= mDay && year <= mYear) {
                if (month <= mMonth)
                    Toast.makeText(getApplicationContext(),
                            "Kindly enter valid date", 100).show();
                mDateDisplay.setText(currDate.getDate());

            }

        } catch (Exception e) {
            e.getMessage();

        }
    }
};

protected void calender() {
    // TODO Auto-generated method stub
    c = Calendar.getInstance();
    mYear = c.get(Calendar.YEAR);
    mMonth = c.get(Calendar.MONTH);
    mDay = c.get(Calendar.DAY_OF_MONTH);
    mhour = c.get(Calendar.HOUR);
    mmin = c.get(Calendar.MINUTE);

}

How do I solve this issue faced in datepicker dialog in android?

2 Answers2