Custom DialogPreference does not trigger OnPreferenceChanged in PreferenceActivity

Question

The custom DialogPreference that gets called from a PreferenceActivity does not call OnPreferenceChange() when the dialog is dismissed.

I thought that persistXXXX() was the trigger:

@Override
protected void onDialogClosed(boolean positiveResult) {
    super.onDialogClosed(positiveResult);
    if(positiveResult) {
        persistString(s);
    }
}

but onPreferenceChanged() does not get called.

All other standard preference types work (e.g. EditTextPreference, ListPreference, etc.).

So the question is: what triggers the OnPreferenceChange() for this preference type ?

Answer 1

protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.settings);
        SharedPreferences sp = PreferenceManager
                .getDefaultSharedPreferences(this);
        sp.registerOnSharedPreferenceChangeListener(this);
    }

I think, you are missing registerOnSharedPreferenceChangeListener