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NullPointerException when using DatePicker setMaxDate () in DatePickerDialog

I am using DatePickerDialog and I am trying to set the minimum and maximum dates so that the user can only select the date in the previous 24 hours or the next 24 hours.

Here is the code. (Note that it only tries to set the min / max range if it is running on Android 3.0 or higher.)

private void showDatePickerDialog() { DatePickerDialog.OnDateSetListener listener = new DatePickerDialog.OnDateSetListener() { @Override public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { calendar.set(Calendar.YEAR, year); calendar.set(Calendar.MONTH, monthOfYear); calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth); onCalendarChanged(); } }; DatePickerDialog dialog = new DatePickerDialog(this, listener, calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH)); setDatePickerDialogRange(dialog); dialog.show(); } @SuppressLint("NewApi") private void setDatePickerDialogRange(DatePickerDialog dialog) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { DatePicker picker = dialog.getDatePicker(); long oneDayMilliseconds = 24 * 60 * 60 * 1000; long nowMilliseconds = new Date().getTime(); long minDate = nowMilliseconds - oneDayMilliseconds; long maxDate = nowMilliseconds + oneDayMilliseconds; picker.setMinDate(minDate); picker.setMaxDate(maxDate); } }

This works fine when working on device 2.2, but on device 4.0.4 (Galaxy Tab 2 7.0) I get this exception:

 11-14 07:58:08.917: E/AndroidRuntime(16611): FATAL EXCEPTION: main 11-14 07:58:08.917: E/AndroidRuntime(16611): java.lang.NullPointerException 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.CalendarView.onScroll(CalendarView.java:910) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.CalendarView.access$600(CalendarView.java:74) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.CalendarView$2.onScroll(CalendarView.java:771) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.AbsListView.invokeOnItemScrollListener(AbsListView.java:1391) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.ListView.layoutChildren(ListView.java:1705) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.AbsListView.onLayout(AbsListView.java:2040) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1644) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1502) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.onLayout(LinearLayout.java:1415) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.FrameLayout.onLayout(FrameLayout.java:431) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1644) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1633) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.onLayout(LinearLayout.java:1417) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.FrameLayout.onLayout(FrameLayout.java:431) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.FrameLayout.onLayout(FrameLayout.java:431) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.FrameLayout.onLayout(FrameLayout.java:431) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1644) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1502) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.LinearLayout.onLayout(LinearLayout.java:1415) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.FrameLayout.onLayout(FrameLayout.java:431) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.FrameLayout.onLayout(FrameLayout.java:431) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.widget.FrameLayout.onLayout(FrameLayout.java:431) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.View.layout(View.java:11330) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewGroup.layout(ViewGroup.java:4235) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1548) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2505) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.os.Handler.dispatchMessage(Handler.java:99) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.os.Looper.loop(Looper.java:137) 11-14 07:58:08.917: E/AndroidRuntime(16611): at android.app.ActivityThread.main(ActivityThread.java:4514) 11-14 07:58:08.917: E/AndroidRuntime(16611): at java.lang.reflect.Method.invokeNative(Native Method) 11-14 07:58:08.917: E/AndroidRuntime(16611): at java.lang.reflect.Method.invoke(Method.java:511) 11-14 07:58:08.917: E/AndroidRuntime(16611): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 11-14 07:58:08.917: E/AndroidRuntime(16611): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 11-14 07:58:08.917: E/AndroidRuntime(16611): at dalvik.system.NativeStart.main(Native Method)

This happens immediately. DatePickerDialog is never displayed.

If I comment out the setMaxDate() , then it works fine. In this case, the minimum date is respected.

If I change it to setMaxDate(nowMilliseconds) , I still get a NullPointerException.

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4 answers

Working on this for quite some time. This is a bug in Android. Just turn off Calendar and everything will be fine:

 picker.setCalendarViewShown(false);
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Try replacing:

 setDatePickerDialogRange(dialog); dialog.show();

in

 dialog.show(); someView.post(new Runnable() { public void run() { setDatePickerDialogRange(dialog); } });

(where someView is some View or Handler , if any)

This will delay the call until setDatePickerDialogRange() until after the dialog is displayed and can be a workaround for your problem.

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 I have seen an issue..

DatePicker setMinDate() and setMaxDate() do not work when the new date corresponds to the same year as the old date min / max

Please follow the link below. Errors in DatePicker setMinDate () and setMaxDate ()

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This worked> = API 19. I don't know if it works. Thanks @JGGerrits.

 Calendar min = (Calendar) minDate.clone(); Calendar max = (Calendar) maxDate.clone(); Calendar selected = (Calendar) selectedDate.clone(); min.set(Calendar.HOUR_OF_DAY, 0); max.set(Calendar.HOUR_OF_DAY, 23); selected.set(Calendar.HOUR_OF_DAY, 12); DatePickerDialog datePickerDialog = new DatePickerDialog(context, callBack, selected); if(Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) { datePickerDialog.getDatePicker().setCalendarViewShown(false); } datePickerDialog.getDatePicker().setMinDate(min.getTimeInMillis()); datePickerDialog.getDatePicker().setMaxDate(max.getTimeInMillis()); datePickerDialog.show();
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