Okay, I think this probably isn't a bug in the preferences now, but I'm still a little in the dark.
One issue is that (as far as I can tell) the array resource type isn't documented, at least it doesn't appear in: http://code.google.com/android/reference/available-resources.html Looking at the ApiDemos I see that <string-array> elements are supported, in addition to plain <array> elements; a little investigation showed that <integer-array> elements are also supported. Changing the <array> to <string-array> seems to fix the problem. But it's not documented that this required. I'm left guessing that array resources defined with an <array> element are automatically coerced into types in a way that causes ListPreference instances to fail. Tom. On Sep 19, 11:57 pm, tomgibara <[EMAIL PROTECTED]> wrote: > This is probably a bug in the Preferences framework, but I'm not > particularly familiar with the API and the documentation is a little > sparse, so I thought I'd check first... > > Is there a restriction on the strings that can be used in the > entryValues array for a ListPreference? > > I define the following two arrays: > > <array name="pref_delay_entries"> > <item>30 minutes</item> > <item>1 hour</item> > <item>2 hours</item> > <item>4 hours</item> > <item>12 hours</item> > <item>day</item> > </array> > > <array name="pref_delay_values"> > <item>1800000</item> > <item>3600000</item> > <item>7200000</item> > <item>14400000</item> > <item>43200000</item> > <item>86400000</item> > </array> > > For use in the following ListPreference: > > <ListPreference > android:key="delay" > android:defaultValue="3600000" > android:title="@string/pref_delay_title" > android:summary="@string/pref_delay_summary" > android:entries="@array/pref_delay_entries" > android:entryValues="@array/pref_delay_values" > android:dialogTitle="@string/pref_delay_dialog_title" > /> > > That's it, very simple. Running my PreferenceActivity and attempting > to open the dialog (SDK 0.9 beta) results in the following exception: > > java.lang.NullPointerException > at > android.preference.ListPreference.findIndexOfValue(ListPreference.java: > 169) > at android.preference.ListPreference.getValueIndex(ListPreference.java: > 178) > at > android.preference.ListPreference.onPrepareDialogBuilder(ListPreference.jav a: > 190) > at > android.preference.DialogPreference.showDialog(DialogPreference.java: > 289) > at android.preference.DialogPreference.onClick(DialogPreference.java: > 260) > at android.preference.Preference.performClick(Preference.java:804) > at > android.preference.PreferenceScreen.onItemClick(PreferenceScreen.java: > 182) > ... > > Changing the elements of the pref_delay_values to something other than > numbers removes the exception. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" 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-developers?hl=en -~----------~----~----~----~------~----~------~--~---
