How to edit SharedPreferences so that OnSharedPreferenceChanged is called

Question

I have a PreferenceScreen in which I have a CheckBox Preference and a simple Preference, which calls a custom dialog. In this custom dialog the user can pick a number. By pressing OK in this dialog I want to save the number by editing my sharedPreferences. After saving it should call automaticaly the OnSharedPreferenceChanged method.

The CheckBox Preference works fine.

I wonder if you have tried http://stackoverflow.com/questions/3799038/onsharedpreferencechanged-not-fired-if-change-occurs-in-separate-activity — Siddharth, Feb 13 '12 at 16:38
I dont understand what you want to show me here... I am registering and unregistering the onchangelistener and it works, I know it because it works with the CheckBox Preference. After picking the number in the dialog I want to save the number in the SharedPreferences and saving a number should automaticaly call the OnSharedPreferenceChanged method. I dont know if this is even possible... — atpanos, Feb 13 '12 at 16:47

score 2 · Answer 1 · answered Feb 13 '12 at 18:35

Your custom dialog should extend DialogPreference. If the preference has been modified call persistXXX() (XXX being the name of the type) like in this example:

@Override
public void onDialogClosed(final boolean positiveResult) {
    if( positiveResult && this.isPersistent() ) {
        final StringBuilder b = new StringBuilder();
        b.append(this.hour).append(':');
        if( this.minute < 10 )
            b.append('0');
        b.append(this.minute);
        this.persistString(b.toString());
    }
}

Thanks for your answer. I will try it in the next days and report — atpanos, Feb 13 '12 at 21:01

How to edit SharedPreferences so that OnSharedPreferenceChanged is called

1 Answers1