Android DatePickerDialog-失败，出现IllegalArgumentException

Question

Something odd that's happening on my Android emulator (Code and emulator run on API Level 10 - being Android 2.3.3): The current date on my emu is 22.08.2011 - if I initialize the DatePickerDialog with those settings (using the values from new Date() - which initializes the Date with the current date/time) then it fails, with the following exception:

08-22 02:14:23.731: ERROR/AndroidRuntime(3038): FATAL EXCEPTION: main
08-22 02:14:23.731: ERROR/AndroidRuntime(3038): java.lang.IllegalArgumentException: current should be >= start and <= end
08-22 02:14:23.731: ERROR/AndroidRuntime(3038):     at android.widget.NumberPicker.setCurrent(NumberPicker.java:288)
08-22 02:14:23.731: ERROR/AndroidRuntime(3038):     at android.widget.DatePicker.updateSpinners(DatePicker.java:357)
08-22 02:14:23.731: ERROR/AndroidRuntime(3038):     at android.widget.DatePicker.init(DatePicker.java:352)
08-22 02:14:23.731: ERROR/AndroidRuntime(3038):     at android.app.DatePickerDialog.<init>(DatePickerDialog.java:127)
08-22 02:14:23.731: ERROR/AndroidRuntime(3038):     at android.app.DatePickerDialog.<init>(DatePickerDialog.java:86)

So I checked out the source Code for DatePicker (For API lvl 2.3.3) and I checked the DatePicker code (because from the strack trace I knew it fails in the updateSpinners method) and at that line 357 (fourths line in the above stack trace) it calls mYearPicker.setCurrent(mYear); which made me think something must be wrong with my year. I logged the year I am passing - it's 2011 as expected. So I manually passed the year 2010 instead which worked - the DatePickerDialog showed up - initialized with the year 2010 (too bad, that I really need the current year - 2011 ;) ...).

I am a bit at a loss as to what the reason is for this... The date on my emulator - as mentioned above - is correctly set to 22.08.2011 - my dev PC is set to the same date...

Any clues/ideas as to where I am going wrong? To make things easier here is the code snippet where I am initializing the DatePickerDialog:

// Initializes a Date object with the current date and time for clarification:
// it is actually declared as a private member variable of my class - 
// just included it here so you guys know of which type dateTime ist

 Date dateTime = new Date();
 Button dateButton = new Button(context);
 dateButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
// dateSetListener is declared as well - but its code has no influence on the failure of 
// the DatePickerDialog - to ensure this I commented all code in the dateSetListener's 
// onDateSet method 

                Dialog dateDialog = new DatePickerDialog(v.getContext(), dateSetListener, dateTime.getYear(),
                        dateTime.getMonth(), dateTime.getDay());
                dateDialog.show();
            }
        });

Thanks in advance & best regards, Ready4Android

Answer 1

Okay after a bit more fiddeling I resorted to something I should have done WAY before: I logged the value of

//As in my example dateTime was initialized with new Date()
dateTime.getYear()

And the value the log showed was 111 ! I know this method is deprecated and apprently for good reasons... My mistake was to not verify that the value 2011 is returned - instead 111 is returned - as the documentation of getYear() says, it returns the years since 1900 - if we add 111 to 1900 we end up with 2011 ... I was tempted for a second to simply add 1900 to the return value but sanity got the better of me and I decided to use the java class Calendar instead.

The reason why I was mislead at first is, that formatting my date using SimpleDateFormat resulted in the correct year - I did not consider the interior working of SimpleDateFormat, otherwise I might have had a clue that I am on the wrong track with my Date object.

To sum it up: There is no Problem with the DatePickerDialog - the problem was with the Date values I passed to it. However it would have been nice, if the error message would have mentioned the exact values instead of current should be >= ...

Answer 2

I think it will not compile, make dateTime field final . Also, have you declared dateSetListener ?