CODEWITHSUNDEEP
androidandroid-preferencespreferencescreen
Eng. Samer T
Eng. Samer T

Reputation: 6526

disable multiple preferences under PreferenceScreen/PreferenceCategory

I have ListPreference which I want to use it for enable/disable multiple preferences which are all under PreferencesScreen/PreferencesCategory (in same activity), so how to do that in one shot?

is there an easy way to disable or enable a grouped preferences depending on ListPreference value in another PreferenceScreen or PreferenceCategory ?

description to generate similar issue:

I am using eclipse, however, similar steps are existed in android studio.

  1. create new project, click new -> android application project -> write any name for this test project and press next(s) then finish.
  2. go to menu: file -> new -> other click on Android object then choose settings then click on next(s) till finish as show bellow.

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after finish click, if any errors appears recompile the project from menu: project -> clean .

now the created project have settings and we can call it by add two lines in MainActivity.java in onOptionsItemSelected method to be like this:

@Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            Intent i = new Intent (this, SettingsActivity.class);
            startActivity(i);
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

run the app and click on settings in action bar to open settings activity

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finally the settings will appears, and contains 3 preferences screens as following:

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look at "add friends to messages" it is in pref_general, what I want is when user change it's value to "never" the all preferences under pref_data_sync should be disabled, while if the new value is "always" then all preferences in pref_notification should disabled otherwise enable all preferences in both screen preferences.

Upvotes: 1

Views: 1406

Answers (1)

cafebabe1991
cafebabe1991

Reputation: 5186

1.) You implement a OnSharedPreferenceChangeListener in your SettingsActivity.java

public class SettingsActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener
{

       //override this method
       public void onSharedPreferenceChanged (SharedPreferences  sharedPreferences, String key)
       {

       }    
}

2.) Now check in this method for the value of "add friends" preference.

public class SettingsActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener
{

       //override this method
       public void onSharedPreferenceChanged (SharedPreferences  sharedPreferences, String key)
       {

       String add_friends = PreferenceManager.getDefaultSharedPreferences(context).getString(
                            "add_friends", null);
       if(add_friends.equalsIgnoreCase("never")
       {
           // Get the screen you want to remove
           PreferenceScreen preferenceScreen = (PreferenceScreen) findPreference("pref_screen");


           //remove the other screens.  
           PreferenceGroup preferenceScreenParent = getParent(preferenceScreen);
           preferenceScreenParent.removePreference(preferenceScreen);
       }

       } 

}

Upvotes: 1

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