UI: re-add OLED friendly (aka black) theme.

Fixes #1625.

src/main/java/de/dennisguse/opentracks/AbstractActivity.java

@@ -22,6 +22,7 @@
 import androidx.appcompat.app.AppCompatActivity;
 
 import de.dennisguse.opentracks.services.announcement.TTSManager;
+import de.dennisguse.opentracks.settings.PreferencesUtils;
 
 /**
  * @author Jimmy Shih
@@ -36,6 +37,10 @@ protected void onCreate(Bundle savedInstanceState) {
         setVolumeControlStream(TTSManager.AUDIO_STREAM);
 
         setContentView(getRootView());
+
+        if (PreferencesUtils.shouldApplyOledTheme()) {
+            setTheme(R.style.OpenTracksThemeOled);
+        }
     }
 
     @Override

src/main/java/de/dennisguse/opentracks/settings/PreferencesUtils.java

@@ -670,13 +670,29 @@ public static boolean getPreventReimportTracks() {
     }
 
     /**
-     * @return {@link androidx.appcompat.app.AppCompatDelegate}.MODE_*
+     * @return * {@link androidx.appcompat.app.AppCompatDelegate}.MODE_*
+     * * 3: Night OLED friendly
      */
-    public static int getDefaultNightMode() {
+    private static String getUiMode() {
         final String defaultValue = getKey(R.string.night_mode_default);
         final String value = getString(R.string.night_mode_key, defaultValue);
 
-        return Integer.parseInt(value);
+        return value;
+    }
+
+    public static boolean shouldApplyOledTheme() {
+        return resources.getString(R.string.night_mode_night_oled_value)
+                .equals(getUiMode());
+    }
+
+    public static void applyNightMode() {
+        String uiMode = getUiMode();
+        if (resources.getString(R.string.night_mode_night_oled_value)
+                .equals(uiMode)) {
+            return;
+        }
+
+        AppCompatDelegate.setDefaultNightMode(Integer.parseInt(uiMode));
     }
 
     public static void resetPreferences(Context context, boolean readAgain) {
@@ -823,10 +839,6 @@ public static void resetCustomLayoutPreferences() {
         }
     }
 
-    public static void applyNightMode() {
-        AppCompatDelegate.setDefaultNightMode(PreferencesUtils.getDefaultNightMode());
-    }
-
     //TODO Check if resetPreferences can be used instead.
     @Deprecated
     @VisibleForTesting

src/main/java/de/dennisguse/opentracks/settings/UserInterfaceSettingsFragment.java

@@ -20,7 +20,10 @@ public class UserInterfaceSettingsFragment extends PreferenceFragmentCompat {
 
     private final SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener = (sharedPreferences, key) -> {
         if (PreferencesUtils.isKey(R.string.night_mode_key, key)) {
-            getActivity().runOnUiThread(PreferencesUtils::applyNightMode);
+            getActivity().runOnUiThread(() -> {
+                PreferencesUtils.applyNightMode();
+                getActivity().recreate();
+            });
         }
     };
 

src/main/res/values/settings.xml

@@ -281,16 +281,19 @@
     <string name="night_mode_default" translatable="false">@string/night_mode_system_value</string>
     <string name="night_mode_no_value" translatable="false">1</string>
     <string name="night_mode_yes_value" translatable="false">2</string>
+    <string name="night_mode_night_oled_value" translatable="false">3</string>
     <string name="night_mode_system_value" translatable="false">-1</string>
     <string-array name="night_mode_values">
         <item>@string/night_mode_system_value</item>
         <item>@string/night_mode_no_value</item>
         <item>@string/night_mode_yes_value</item>
+        <item>@string/night_mode_night_oled_value</item>
     </string-array>
     <string-array name="night_mode_options">
         <item>@string/settings_night_mode_option_system</item>
         <item>@string/settings_night_mode_option_day</item>
         <item>@string/settings_night_mode_option_night</item>
+        <item>@string/settings_night_mode_option_night_oled</item>
     </string-array>
 
     <!-- Stats layout customization -->

src/main/res/values/strings.xml

@@ -404,6 +404,7 @@ limitations under the License.
     <string name="settings_night_mode_option_system">System</string>
     <string name="settings_night_mode_option_day">Day</string>
     <string name="settings_night_mode_option_night">Night</string>
+    <string name="settings_night_mode_option_night_oled">Night (OLED friendly)</string>
 
     <string name="settings_announcements_totaltime_frequency">Time interval</string>
     <string name="settings_announcements_distance_frequency">Lap length</string>

src/main/res/values/styles_theme.xml

@@ -31,4 +31,29 @@
     <style name="Widget.OpenTracks.BottomAppBar" parent="Widget.Material3.BottomAppBar">
         <item name="backgroundTint">?attr/colorSurfaceContainer</item>
     </style>
+
+    <style name="OpenTracksThemeOled" parent="Theme.Material3.Dark.NoActionBar">
+        <item name="colorPrimary">@color/opentracks</item>
+        <item name="colorSecondary">@color/opentracks</item>
+
+        <!-- Material3 https://github.com/material-components/material-components-android/issues/2828#issuecomment-1187563903 -->
+        <item name="switchPreferenceCompatStyle">@style/MaterialSwitchPreferenceCompat</item>
+
+        <item name="android:statusBarColor">?attr/colorSurfaceBright</item>
+        <item name="android:windowLightStatusBar">true</item>
+        <item name="android:navigationBarColor">?attr/colorSurfaceContainer</item>
+
+        <!-- Snackbar -->
+        <item name="snackbarStyle">@style/MaterialSnackbarTheme</item>
+        <item name="snackbarButtonStyle">@style/MaterialSnackbarTextButtonTheme</item>
+        <item name="snackbarTextViewStyle">@style/MaterialSnackbarTextViewTheme</item>
+
+        <item name="bottomAppBarStyle">@style/Widget.OpenTracks.BottomAppBar</item>
+        <item name="floatingActionButtonStyle">@style/Widget.OpenTracks.FloatingActionButton</item>
+
+        <item name="windowActionModeOverlay">true</item>
+
+        <!-- Differences to OpenTracksTheme -->
+        <item name="android:colorBackground">@android:color/black</item>
+    </style>
 </resources>