Ich habe diese RingtonePreference (aus den Standardeinstellungen von Android Studio):

pref_notification.xml:

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <RingtonePreference
        android:dependency="notifications_alarm"
        android:key="notifications_alarm_ringtone"
        android:title="@string/pref_title_ringtone"
        android:ringtoneType="notification|all"
        android:defaultValue="content://settings/system/notification_sound" />

SettingsActivity.java:

private void setupSimplePreferencesScreen() {
    if (!isSimplePreferences(this)) {
        return;
    }

    // Add 'general' preferences.
    addPreferencesFromResource(R.xml.pref_general);

    // Add 'notifications' preferences, and a corresponding header.
    PreferenceCategory fakeHeader = new PreferenceCategory(this);
    fakeHeader.setTitle(R.string.pref_header_notifications);
    getPreferenceScreen().addPreference(fakeHeader);
    addPreferencesFromResource(R.xml.pref_notification);

    bindPreferenceSummaryToValue(findPreference("notifications_alarm_ringtone"));
}

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public static class NotificationPreferenceFragment extends PreferenceFragment {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.pref_notification);

        bindPreferenceSummaryToValue(findPreference("notifications_alarm_ringtone"));
    }
}

Ich möchte die benutzerdefinierten Klingeltöne meiner App aus dem Ordner res / raw zur Liste hinzufügen. (Ich brauche sie nicht, um für andere Apps verfügbar zu sein.)