How to use a DatePickerDialog

You do not have a direct widget for date entry. You should use an edittext and enter the date in yyyy-mm-dd format. Instead you can use a datepicker dialog. This dialog can be displayed when user types on the editText which should store the date

If your edit text is etDialogDate,

etDialogDate.setOnClickListener(new OnClickListener() {
          
            @Override
            public void onClick(View v) {
                String dateText = ((TextView)v).getText().toString();
                int year,month,day;
                String temp[]=dateText.split("-");
                year = Integer.valueOf(temp[0]);
                month = Integer.valueOf(temp[1]);
                day= Integer.valueOf(temp[2]);
                DatePickerDialog dtpkrdlg = new 

                     DatePickerDialog(ExpenseList.this, 0, 

                      new  DateSetListener(), year, month-1, day);
                dtpkrdlg.show();
              
            }});

Now this will show the datepicker dialog with initial value as date shown in edittext.

Once the date is set in the dialog it will call the callback function using DateSetListener. Let us define this DateSetListener class as follows

class DateSetListener implements DatePickerDialog.OnDateSetListener{

        @Override
        public void onDateSet(DatePicker view, 

                              int year, int monthOfYear,
                               int dayOfMonth) {
           
             etDialogDate.setText(""+year+"-"+

               (monthOfYear+1)+"-"+dayOfMonth);
           
        }
       
    }

Now any date set in the dialog is displayed back in our edittext widget.

Observe that we have used monthOfYear+1 because in Android Jan is 0 not 1.