Preference.onSetInitialValue is triggered by addPreferencesFromResource, which in turn is called from within your activity's onCreate - not before.
However, this happens before your code has a change to call findPreference / setKey. One of the methods that gets called while this is taking place is PreferenceGroup.addPreference. This could be a reasonable place to reset the keys, so it happens before onSetInitialValue. The actual subclasses are PreferenceScreen and PreferenceCategory. You can check for a specifc runtime class by using Java 'instanceof' operator (but this should not be necessary with overiding addPreference). -- Kostya 2011/5/26 Jake Colman <[email protected]> > >>>>> "S" == String <[email protected]> writes: > > S> On Thursday, May 26, 2011 2:44:37 AM UTC+1, Jake Colman wrote: > > S> The only issue is when I launch the Preference > >> Activity from the widget it does not display the widget-specific > value > >> but displays the preference's default value. > >> > S> Are you actively setting the value for each of your > S> widget-specific preferences, or are you just setting the key and > S> hoping they'll pick up the correct (initial) value from the > S> SharedPreferences? I think you need to do the former rather than > S> the latter. > > S> IOW, my experience is that the initialization of the preferences > S> in a PreferenceActivity happens before your onCreate() handler is > S> called, so changing preferences' keys there won't affect their > S> displayed values. You should just need a simple call to > S> setChecked() for each boolean preference to initialize it to the > S> appropriate, widget-specific value. > > String, > > What I am seeing is consistent with what you stated, namely, that by the > time onCreate is called, the preferences are already initialized so the > displayed values have already been set. But why does this only effect > my CheckBoxPreferences whil my ListPrefeference values are being set > correctly? > > When I call findPreference is there a way for me to determine the > specific derived Preference class that I acually got? With C++ I can > dynamic_cast the base class to find out its actual type. How does one > do the same in Java? If so, then in the method that resets the generic > preference key to a widget-specific key I can check whether the > Preference is actually a checkbox and then get and set its actual value. > > Hmmmmm. Maybe I should just write some code to always just drill into > the SharedPreferences and manually set the value across all types. As > long as I can query the Preference object to get its specific type, I > can generically explicitly set the value for all preferences. > > -- > Jake Colman -- Android Tinkerer > > -- > 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 > -- 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
