[android-developers] Re: How to force hierarchy change to PreferenceActivity?
Thanks for helpful comment, Jason. I got an answer for this. I pasted
for those who want to do similar.
-
protected void onCreate(Bundle savedInstanceState) {
createPreferenceHierarchy();
setPreferenceScreen(mRoot);
}
private void createPreferenceHierarchy()
{
// Root
mRoot = getPreferenceManager().createPreferenceScreen(this);
// Orientation tracking smoothing method preference
mOrientationSmoothingPref = getPreferenceManager
().createPreferenceScreen(this);
mOrientationSmoothingPref.setKey( (String) getResources().getText
(R.string.key_screen_orientation_smoothing_method) );
mOrientationSmoothingPref.setTitle
(R.string.title_screen_orientation_smoothing_method);
mOrientationSmoothingPref.setSummary
(R.string.summary_screen_orientation_smoothing_method);
mRoot.addPreference(mOrientationSmoothingPref);
// List preference
mOrientationSmoothinglistPref = new ListPreference(this);
mOrientationSmoothinglistPref.setEntries
(R.array.entries_orientation_smoothing_method_preference);
mOrientationSmoothinglistPref.setEntryValues
(R.array.entryvalues_orientation_smoothing_method_preference);
mOrientationSmoothinglistPref.setKey( (String) getResources
().getText(R.string.key_preference_orientation_smoothing_method) );
mOrientationSmoothinglistPref.setTitle
(R.string.title_preference_orientation_smoothing_method);
mOrientationSmoothinglistPref.setDialogTitle
(R.string.title_preference_orientation_smoothing_method);
mOrientationSmoothinglistPref.setDefaultValue("No");
mOrientationSmoothingPref.addPreference
(mOrientationSmoothinglistPref);
// Create parameter preference category
createOrientationSmoothingParameterPreferenceCategory();
}
private void createOrientationSmoothingParameterPreferenceCategory()
{
mOriantationSmoothingParameterPrefCat = new PreferenceCategory(this);
if ( mOrientationSmoothinglistPref.getValue().equals("ma") )
{
// Set summary to list pref
mOrientationSmoothinglistPref.setSummary("Moving Averaging");
// Moving averaging parameters category
mOriantationSmoothingParameterPrefCat.setTitle
(R.string.title_category_orientation_ma_parameter);
mOrientationSmoothingPref.addPreference
(mOriantationSmoothingParameterPrefCat);
// Edit text preference
mMaNPref = new EditTextPreference(this);
mMaNPref.setKey( (String) getResources().getText
(R.string.key_preference_ma_n) );
mMaNPref.setDialogTitle(R.string.title_preference_ma_n);
mMaNPref.setTitle(R.string.title_preference_ma_n);
mMaNPref.setSummary(R.string.summary_preference_ma_n);
mMaNPref.setDefaultValue("10");
mOriantationSmoothingParameterPrefCat.addPreference(mMaNPref);
}
else if ( mOrientationSmoothinglistPref.getValue().equals("ses") )
{
// Set summary to list pref
mOrientationSmoothinglistPref.setSummary("Single exponential
smoothing");
// Single exponential smoothing parameters category
mOriantationSmoothingParameterPrefCat.setTitle
(R.string.title_category_orientation_ses_parameter);
mOrientationSmoothingPref.addPreference
(mOriantationSmoothingParameterPrefCat);
// Edit text preference
mSesalphaPref = new EditTextPreference(this);
mSesalphaPref.setKey( (String) getResources().getText
(R.string.key_preference_ses_alpha) );
mSesalphaPref.setTitle(R.string.title_preference_ses_alpha);
mSesalphaPref.setDialogTitle
(R.string.title_preference_ses_alpha);
mSesalphaPref.setSummary
(R.string.summary_preference_ses_alpha);
mSesalphaPref.setDefaultValue("0.3");
mOriantationSmoothingParameterPrefCat.addPreference
(mSesalphaPref);
}
else if ( mOrientationSmoothinglistPref.getValue().equals("des") )
{
// Set summary to list pref
mOrientationSmoothinglistPref.setSummary("Double exponential
smoothing");
// Double exponential smoothing parameters category
mOriantationSmoothingParameterPrefCat.setTitle
(R.string.title_category_orientation_des_parameter);
mOrientationSmoothingPref.addPreference
(mOriantationSmoothingParameterPrefCat);
// Edit text preference
mDesalphaPref = new EditTextPreference(this);
mDesalphaPref.setKey( (String) getResources().getText
(R.string.key_preference_des_alpha) );
mDesalphaPref.setTitle(R.string.title_preference_des_alpha);
mDesalphaPref.setDialogTitle
(R.string.title_preference_des_alpha);
mDesalphaPref.setSummary
(R.string.summary_preference_des_alpha);
mDesalphaPref.setDefaultValue("0.3");
mOriantationSmoothingParameterPrefCat.addPreference
(mDesalphaPref);
// Edit text preference
mDesgammaPref = new EditTextPreference(this);
mDesgammaPref.setKey( (String) getResources().getText
(R.string.key_preference_des_gamma) );
mDesgammaPref.setTitle(R.string.title_preference_des_gamma);
mDesgammaPref.setDialogTi
[android-developers] Re: How to force hierarchy change to PreferenceActivity?
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 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.setDial
