Get value from CheckBoxPreference when it is changed

Question

I'm trying to create Preference Screen with a Checkbox control.

 <CheckBoxPreference android:summaryOn="@string/mySummaryOn" 
  android:summaryOff="@string/mySummaryOff" 
  android:key="myCB" 
  android:title="my checkbox"/>

I want to get this Boolean value when ever its getting changed.

In my Application i have done as below implementing OnSharedPreferenceChangeListener

public boolean cbValue;
 @Override
    public void onCreate() {
        // The following line triggers the initialization of ACRA
        ACRA.init(this);
        prefs=PreferenceManager.getDefaultSharedPreferences(this);
        prefs.registerOnSharedPreferenceChangeListener(this);
        super.onCreate();
    }

public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
        String key) {
    // TODO Auto-generated method stub
    //FacebookStatus=prefs.getBoolean("myCB", true);
    Toast.makeText(getBaseContext(), "Shared Preference Changes ",Toast.LENGTH_LONG ).show();
}

onSharedPreferenceChanged method is not at all called even when i toggle check box in pref screen.

If i need to get value from Shared preference each time when value is changed wat should i do?

I have solved this by [Shared Preferences](http://stackoverflow.com/questions/531427/how-do-i-display-the-current-value-of-an-android-preference-in-the-preference-su) .... Thanks a lot guys for help — shanmugamgsn, Nov 07 '11 at 05:01

Antek · Accepted Answer · 2011-11-06T15:08:43.170

2

Instead of using OnSharedPreferenceChangeListener:

Add to your preference activity's onCreate method following line: Preference myCheckbox = findPreference("myCB") Then apply a listener to myCheckbox object: myCheckbox.setOnPreferenceChangeListener(myCheckboxListener)

Code of the listener (as a class field):

private OnPreferenceChangeListener myCheckboxListener = new OnPreferenceChangeListener() {

    public boolean onPreferenceChange(Preference preference, Object newValue) {
        // Read new value from Object newValue here
        return true;
    }
};

edited Nov 06 '11 at 15:08

answered Nov 06 '11 at 14:59

Antek

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Thanks Antek.... But myCheckbox.setOnPreferenceChangeListener(myCheckboxListener) it says myCheckboxListener cannpt be resolved... Do i need to implement any? – shanmugamgsn Nov 06 '11 at 16:45
Hey Antek.... could you say how to get boolean value from Checkbox insidde onPreferenceClick??????????? – shanmugamgsn Nov 06 '11 at 17:35
Hey Antek I have solved this by [Shared Preferences](http://stackoverflow.com/questions/531427/how-do-i-display-the-current-value-of-an-android-preference-in-the-preference-su) .... Thanks a lot guys for help – shanmugamgsn Nov 07 '11 at 05:04

score 1 · Answer 2 · answered Mar 01 '20 at 02:31

SwitchPreference switchPref = (SwitchPreference)findPreference("switchPref");
switchPref.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        boolean beforeChange = ((SwitchPreference) preference).isChecked();
        boolean afterChange = !beforeChange;
        ((SwitchPreference) preference).setChecked(afterChange);
        // Toast.makeText(getContext(), ""+afterChange, Toast.LENGTH_SHORT).show();
        return false;
    }
});

If you override onPreferenceChange(), the checked status doesn't change when you clicked the switch.

Don't forget to add switchPref.setChecked(!isChecked()).

score 0 · Answer 3 · answered Sep 09 '14 at 21:47

You can read the new value directly with the SharedPreferences parameter object. If you know that the key is from the CheckBoxPreference you can just read the value:

@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {

    if (key == getString(R.string.CheckBoxKeyId)) {
        boolean myBool = sharedPreferences.getBoolean(key, false);
        // do stuff
    }
}

This saves you adding an OnPreferenceChangeListener for each of the CheckBoxPreference you might have.

Get value from CheckBoxPreference when it is changed

3 Answers3