The preference framework will refresh the UI when a preference has a UI-visible attribute changed, for example the summary. So, you can just do myPreference.setSummary(myPreference.getValue()) (assuming you want to show the selected item as the summary of the preference).
On Fri, Jun 12, 2009 at 4:29 AM, yoshitaka tokusho <[email protected]>wrote: > > I have a PreferenceActivity building screen hierarchy from code, and I > need to force display hierarchy change dynamically when one of > SharedPreference value changed. I know this might be a kind of easy > quesiton, but I couldn't find answer anywhere in documentations or > discussion. > > My PreferenceActivity is forming like this. > > ----- > public class MyPreferenceActivity extends PreferenceActivity > ... > setPreferenceScreen(createPreferenceHierarchy()); > } > > private PreferenceScreen createPreferenceHierarchy() > { > // Root > PreferenceScreen root = getPreferenceManager > ().createPreferenceScreen(this); > > // Orientation tracking smoothing method preference > PreferenceScreen orientationsmoothingPref = getPreferenceManager > ().createPreferenceScreen(this); > orientationsmoothingPref.setKey( (String) getResources().getText > (R.string.key_screen_orientation_smoothing_method) ); > orientationsmoothingPref.setTitle > (R.string.title_screen_orientation_smoothing_method); > orientationsmoothingPref.setSummary > (R.string.summary_screen_orientation_smoothing_method); > root.addPreference(orientationsmoothingPref); > > // List preference > ListPreference orientationsmoothinglistPref = new ListPreference > (this); > orientationsmoothinglistPref.setEntries > (R.array.entries_orientation_smoothing_method_preference); > orientationsmoothinglistPref.setEntryValues > (R.array.entryvalues_orientation_smoothing_method_preference); > orientationsmoothinglistPref.setKey( (String) getResources().getText > (R.string.key_preference_orientation_smoothing_method) ); > orientationsmoothinglistPref.setTitle > (R.string.title_preference_orientation_smoothing_method); > orientationsmoothinglistPref.setSummary > (R.string.summary_preference_orientation_smoothing_method); > orientationsmoothinglistPref.setDefaultValue("No"); > > orientationsmoothingPref.addPreference(orientationsmoothinglistPref); > > // Orientation smoothing parameters category > PreferenceCategory orientationsmoothingparameterPrefCat = new > PreferenceCategory(this); > orientationsmoothingparameterPrefCat.setTitle > (R.string.title_category_orientation_smoothing_method_parameter); > orientationsmoothingPref.addPreference > (orientationsmoothingparameterPrefCat); > > String orientationsmoothingmethodStr = > orientationsmoothinglistPref.getValue(); > > if ( orientationsmoothingmethodStr.compareTo("no") == 0 ) > { > /* In case orientation smoothing method is "No" */ > // Nothing to do. > } > else if ( orientationsmoothingmethodStr.compareTo("ma") == 0 ) > { > /* In case orientation smoothing method is "Moving > Averaging" */ > > // Edit text preference > EditTextPreference maNPref = new EditTextPreference(this); > maNPref.setKey( (String) getResources().getText > (R.string.key_preference_ma_n) ); > maNPref.setDialogTitle(R.string.title_preference_ma_n); > maNPref.setTitle(R.string.title_preference_ma_n); > maNPref.setSummary(R.string.summary_preference_ma_n); > maNPref.setDefaultValue("10"); > orientationsmoothingparameterPrefCat.addPreference(maNPref); > > } > else if ( orientationsmoothingmethodStr.compareTo("ses") == 0 ) > { > /* In case orientation smoothing method is "Single > Exponential > Smoothing" */ > > // Edit text preference > EditTextPreference sesalphaPref = new EditTextPreference(this); > sesalphaPref.setKey( (String) getResources().getText > (R.string.key_preference_ses_alpha) ); > sesalphaPref.setTitle(R.string.title_preference_ses_alpha); > > sesalphaPref.setDialogTitle(R.string.title_preference_ses_alpha); > sesalphaPref.setSummary(R.string.summary_preference_ses_alpha); > sesalphaPref.setDefaultValue("0.3"); > > orientationsmoothingparameterPrefCat.addPreference(sesalphaPref); > > } > else if ( orientationsmoothingmethodStr.compareTo("des") == 0 ) > { > /* In case orientation smoothing method is "Single > Exponential > Smoothing" */ > > // Edit text preference > EditTextPreference desalphaPref = new EditTextPreference(this); > desalphaPref.setKey( (String) getResources().getText > (R.string.key_preference_des_alpha) ); > desalphaPref.setTitle(R.string.title_preference_des_alpha); > > desalphaPref.setDialogTitle(R.string.title_preference_des_alpha); > desalphaPref.setSummary(R.string.summary_preference_des_alpha); > desalphaPref.setDefaultValue("0.3"); > > orientationsmoothingparameterPrefCat.addPreference(desalphaPref); > > // Edit text preference > EditTextPreference desgammaPref = new EditTextPreference(this); > desgammaPref.setKey( (String) getResources().getText > (R.string.key_preference_des_gamma) ); > desgammaPref.setTitle(R.string.title_preference_des_gamma); > > desgammaPref.setDialogTitle(R.string.title_preference_des_gamma); > desgammaPref.setSummary(R.string.summary_preference_des_gamma); > desgammaPref.setDefaultValue("1.0"); > > orientationsmoothingparameterPrefCat.addPreference(desgammaPref); > > } > > return root; > } > ----- > > What I want to do it is everytime ListPreference's value changes, > force redisplay PreferenceScreen. If anyone have any hint, please > reply here. Thanks. > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
