I'm using the RadioGroup version of it: RadioGroup.OnCheckedChangeListener.html
http://code.google.com/android/reference/android/widget/RadioGroup.OnCheckedChangeListener.html On closer examination of the logcat, and further using my brain I realised what was going on. I had updated my function to: public void onCheckedChanged(RadioGroup group, int checkedId){ if (group != null){ mChecked = checkedId; if (group == mColorGroup){ mColorGroup2.clearCheck(); } else if(group == mColorGroup2) { mColorGroup.clearCheck(); } } } Of course, the group is not null, even if I have cleared a checkbox, so this just results in oncheckchanged being called, and many instances of the method building up, resulting in: 11-21 19:39:31.976: INFO/dalvikvm(446): Stack overflow, expanding (0x41049200 to 0x41049000) 11-21 19:39:31.976: WARN/dalvikvm(446): threadid=3: thread exiting with uncaught exception (group=0x40010e28) 11-21 19:39:31.976: ERROR/AndroidRuntime(446): Uncaught handler: thread main exiting due to uncaught exception 11-21 19:39:31.976: ERROR/AndroidRuntime(446): java.lang.NullPointerException I will have a look later at how to get around this. Thanks for all your help. On Nov 21, 7:41 pm, Mark Murphy <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] wrote: > > I wish there was an edit button here! > > > How can I perform a null check on an int? > > If I use > > > if (checkedId != null) > > I get the error "The operator != is undefined for the argument type(s) > > int, null". > > I think onCheckedChanged() is supposed to have a boolean second parameter: > > http://code.google.com/android/reference/android/widget/CompoundButto... > > -- > Mark Murphy (a Commons Guy)http://commonsware.com > > Android Training on the Ranch! -- Mar 16-20, > 2009http://www.bignerdranch.com/schedule.shtml --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
