Beiträge von PhilippBaumi

import android.os.Bundle;


import androidx.appcompat.app.AppCompatDelegate;
import androidx.preference.ListPreference;
import androidx.preference.Preference;
import androidx.preference.PreferenceFragmentCompat;
import androidx.preference.PreferenceScreen;


import htl.grieskirchen.pos.android.filmapp.R;


public class MySettingsFragment extends PreferenceFragmentCompat {


    private String theme;
    @Override
    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
        setPreferencesFromResource(R.xml.preferences, rootKey);
        PreferenceScreen screen = getPreferenceScreen();
        final ListPreference listPreference = (ListPreference) findPreference("theme");
        int api = android.os.Build.VERSION.SDK_INT;
        if (api < 29) {
            assert listPreference != null;
            screen.removePreference(listPreference);
        }
        assert listPreference != null;
        listPreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
            @Override
            public boolean onPreferenceChange(Preference preference, Object newValue) {
                listPreference.setValue(newValue.toString());
                theme = String.valueOf(listPreference.getEntry());
                if (theme.equals("Hell")) {
                    AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
                }
                if (theme.equals("Dunkel")) {
                    AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
                }
                if (theme.equals("Standart vom System übernehmen")) {
                    AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
                }
                return true;
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">


    <ListPreference
        android:id="@+id/listTheme"
        android:defaultValue="light"
        app:entries="@array/theme_entries"
        app:entryValues="@array/theme_values"
        app:key="theme"
        app:title="@string/changeBackground"
        app:useSimpleSummaryProvider="true"/>
</PreferenceScreen>

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="theme_entries" >
        <item>Hell</item>
        <item>Dunkel</item>
        <item>Standard vom System übernehmen</item>
    </string-array>


    <string-array name="theme_values">
        <item>light</item>
        <item>dark</item>
        <item>default1</item>
    </string-array>
</resources>