How to listen to listPreference, to change screen orientation?

Question

I have a PreferenceActivity in which I would like to have the option to change/lock the screen orientation.

The orientation should lock only the Main Activity screen orientation

I not sure were and how I should call the change listener. On the onCreate and onResume of the Main Activity seems right but I can't get it to work.

settings.xml

   <ListPreference     android:title="Screen orientation"
    android:summary="current: %s"
    android:key="rotation"
    android:defaultValue="1"
    android:entries="@array/listArray"
    android:entryValues="@array/listValues" />

array.xml

<resources>
<string-array name="listArray">
    <item>Auto rotate</item>
    <item>Portrait</item>
    <item>Landscape</item>
</string-array>

<string-array name="listValues">
    <item>1</item>
    <item>2</item>
    <item>3</item>
</string-array>

The Preference Activity

public class MyPreferencesActivity extends PreferenceActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();
}

public static class MyPreferenceFragment extends PreferenceFragment  {

    @Override
    public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.settings);
    }

}

Links I already looked

How to create a Listener to Preferences changes in Preferences activity?

Adding listeners to individual ListPreference items

How to listen for preference changes within a PreferenceFragment?

OnSharedPreferenceChangeListener not registering change in preference

http://envyandroid.com/android-detect-preference-changes/

score 1 · Answer 1 · answered Sep 11 '21 at 13:30

After a long time but it's helpful for other developers. You need to implement Preference.OnPreferenceChangeListener to listen dialog of radio buttons or enteries in Dialog. Then onPreferenceChange param newValue give select ration button value.

class SettingsFragment : PreferenceFragmentCompat(), Preference.OnPreferenceChangeListener {
    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        setPreferencesFromResource(R.xml.root_preferences, rootKey)
        
        val modePrefs :ListPreference = findPreference("rotation")!!
        modePrefs.onPreferenceChangeListener = this
    }
    override fun onPreferenceChange(preference: Preference?, newValue: Any?): Boolean {
        if ()
        return true
    }
}

How to listen to listPreference, to change screen orientation?

1 Answers1