Add setting to manually enable/disable night mode (fixes #35)

app/src/main/java/net/vonforst/evmap/fragment/SettingsFragment.kt

@@ -3,6 +3,7 @@ package net.vonforst.evmap.fragment
 import android.content.SharedPreferences
 import android.os.Bundle
 import android.view.View
+import androidx.appcompat.app.AppCompatDelegate
 import androidx.appcompat.widget.Toolbar
 import androidx.navigation.fragment.findNavController
 import androidx.navigation.ui.setupWithNavController
@@ -10,13 +11,17 @@ import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import net.vonforst.evmap.MapsActivity
 import net.vonforst.evmap.R
+import net.vonforst.evmap.storage.PreferenceDataSource
 
 
 class SettingsFragment : PreferenceFragmentCompat(),
     SharedPreferences.OnSharedPreferenceChangeListener {
+    private lateinit var prefs: PreferenceDataSource
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
         val toolbar = view.findViewById(R.id.toolbar) as Toolbar
+        prefs = PreferenceDataSource(requireContext())
 
         val navController = findNavController()
         toolbar.setupWithNavController(
@@ -43,6 +48,15 @@ class SettingsFragment : PreferenceFragmentCompat(),
                     it.startActivity(it.intent);
                 }
             }
+            "darkmode" -> {
+                AppCompatDelegate.setDefaultNightMode(
+                    when (prefs.darkmode) {
+                        "on" -> AppCompatDelegate.MODE_NIGHT_YES
+                        "off" -> AppCompatDelegate.MODE_NIGHT_NO
+                        else -> AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+                    }
+                )
+            }
         }
     }
 

app/src/main/java/net/vonforst/evmap/storage/PreferenceDataSource.kt

@@ -39,4 +39,7 @@ class PreferenceDataSource(context: Context) {
 
     val language: String
         get() = sp.getString("language", "default")!!
+
+    val darkmode: String
+        get() = sp.getString("darkmode", "default")!!
 }

app/src/main/res/values-de/arrays.xml

@@ -5,4 +5,9 @@
         <item>Englisch</item>
         <item>Deutsch</item>
     </string-array>
+    <string-array name="pref_darkmode_names">
+        <item>Geräteeinstellung verwenden</item>
+        <item>immer an</item>
+        <item>immer aus</item>
+    </string-array>
 </resources>

app/src/main/res/values-de/strings.xml

@@ -92,6 +92,8 @@
     <string name="ok">OK</string>
     <string name="pref_language">Sprache</string>
     <string name="pref_language_summary">App-Sprache ändern</string>
+    <string name="pref_darkmode">Dunkles Design</string>
+    <string name="pref_darkmode_summary">Einstellen, wann der Nachtmodus genutzt wird</string>
     <string name="connection_error">Ladesäulen konnten nicht geladen werden</string>
     <string name="retry">Wiederholen</string>
     <string name="filter_open_247">24 Stunden geöffnet</string>

app/src/main/res/values/arrays.xml

@@ -10,4 +10,14 @@
         <item>en</item>
         <item>de</item>
     </string-array>
+    <string-array name="pref_darkmode_names">
+        <item>Device default</item>
+        <item>always on</item>
+        <item>always off</item>
+    </string-array>
+    <string-array name="pref_darkmode_values" tranlatable="false">
+        <item>default</item>
+        <item>on</item>
+        <item>off</item>
+    </string-array>
 </resources>

app/src/main/res/values/strings.xml

@@ -91,6 +91,8 @@
     <string name="ok">OK</string>
     <string name="pref_language">Language</string>
     <string name="pref_language_summary">Change the app language</string>
+    <string name="pref_darkmode">Dark mode</string>
+    <string name="pref_darkmode_summary">Set when dark mode is activated</string>
     <string name="connection_error">Could not load charging stations</string>
     <string name="retry">Retry</string>
     <string name="filter_open_247">Available 24/7</string>

app/src/main/res/xml/settings.xml

@@ -18,5 +18,13 @@
             android:defaultValue="default"
             android:summary="@string/pref_language_summary" />
 
+        <ListPreference
+            android:key="darkmode"
+            android:title="@string/pref_darkmode"
+            android:entries="@array/pref_darkmode_names"
+            android:entryValues="@array/pref_darkmode_values"
+            android:defaultValue="default"
+            android:summary="@string/pref_darkmode_summary" />
+
     </PreferenceCategory>
 </PreferenceScreen>