Question

I want to have in my activity a button that shows default the current date as a button title and when i click the button to show a date picker dialog and shown the new pick as button title.

How can i achieve that?Any better idea?Is better to do this with EditText for being easier fro the user that he can change the date?

Answer 1

i have attached code here for both time and date, use this as per your requirements.
here intend of txtdate and txtTime youcan set it on button text.

private static final int DIALOG_DATE = 1;
         private static final int DIALOG_TIME = 2;    


private Calendar dateTime = Calendar.getInstance();
     private SimpleDateFormat dateFormatter = new SimpleDateFormat(
             "MMMM dd yyyy");
     private SimpleDateFormat timeFormatter = new SimpleDateFormat(
             "hh:mm a");


                 txtstdate.setText(dateFormatter.format(dateTime.getTime()));   
  txtAddtime.setText(timeFormatter.format(dateTime.getTime()));


@Override
    protected Dialog onCreateDialog(int id)
    {
        switch (id)
        {
        case DIALOG_DATE:
            return new DatePickerDialog(this, new OnDateSetListener()
            {

                @Override
                public void onDateSet(DatePicker view, int year,
                        int monthOfYear, int dayOfMonth)
                {
                    dateTime.set(year, monthOfYear, dayOfMonth);
                    txtstdate.setText(dateFormatter.format(dateTime.getTime()));
                    txtAdddate.setText(dateFormatter.format(dateTime.getTime()));
                }
            }, dateTime.get(Calendar.YEAR),
               dateTime.get(Calendar.MONTH),
               dateTime.get(Calendar.DAY_OF_MONTH));

        case DIALOG_TIME:
            return new TimePickerDialog(this, new OnTimeSetListener()
            {

                @Override
                public void onTimeSet(TimePicker view, int hourOfDay,
                        int minute)
                {
                    dateTime.set(Calendar.HOUR_OF_DAY, hourOfDay);
                    dateTime.set(Calendar.MINUTE, minute);
                    txtsttime.setText(timeFormatter.format(dateTime.getTime()));
                    txtAddtime.setText(timeFormatter.format(dateTime.getTime()));
                }
            }, dateTime.get(Calendar.HOUR_OF_DAY),
               dateTime.get(Calendar.MINUTE), false);

        }
        return null;
    }


}

**Call Dialog:**    

Call This method on button click event.

showDialog(DIALOG_DATE);

showDialog(DIALOG_TIME);

Visit For More Ref: http://hasmukhbhadani.blogspot.in/search/label/Date%20and%20time%20Dialog.
http://hasmukhbhadani.blogspot.in/search/label/DatePickerSlider%20in%20android.