Add option to make dark theme a black theme

Signed-off-by: androidacy-user <opensource@androidacy.com>

Author: androidacy-user

app/src/main/java/com/fox2code/mmm/MainApplication.java

@@ -295,9 +295,20 @@ public void updateTheme() {
                         R.style.Theme_MagiskModuleManager_Light;
                 break;
         }
+        // Handle force black theme
+        if (theme.equals("dark") && isForceBlackThemeEnabled()) {
+            // just black background
+            themeResId = monet ?
+                    R.style.Theme_MagiskModuleManager_Monet_Black :
+                    R.style.Theme_MagiskModuleManager_Black;
+        }
         this.setManagerThemeResId(themeResId);
     }
 
+    private boolean isForceBlackThemeEnabled() {
+        return getSharedPreferences().getBoolean("pref_force_black_theme", false);
+    }
+
     @StyleRes
     public int getManagerThemeResId() {
         return managerThemeResId;

app/src/main/java/com/fox2code/mmm/settings/SettingsActivity.java

@@ -137,6 +137,20 @@ public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
                 }, 1);
                 return true;
             });
+            // Force black theme - depends on themePreference being system or dark
+            SwitchPreferenceCompat forceBlackPreference = findPreference("pref_force_black_theme");
+            // Set invisible if theme is not dark or system
+            forceBlackPreference.setVisible(themePreference.getValue().equals("dark") ||
+                    themePreference.getValue().equals("system"));
+            forceBlackPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+                devModeStep = 0;
+                UiThreadHandler.handler.postDelayed(() -> {
+                    MainApplication.getINSTANCE().updateTheme();
+                    FoxActivity.getFoxActivity(this).setThemeRecreate(
+                            MainApplication.getINSTANCE().getManagerThemeResId());
+                }, 1);
+                return true;
+            });
             // Crash reporting
             TwoStatePreference crashReportingPreference = findPreference("pref_crash_reporting");
             if (!SentryMain.IS_SENTRY_INSTALLED) crashReportingPreference.setVisible(false);

app/src/main/res/values-v31/themes.xml

@@ -22,6 +22,16 @@
         <item name="chipStyle">@style/Widget.Material3.Chip.Choice.Dark</item>
     </style>
 
+    <!-- Black monet theme, which is just dark monet theme with black background -->
+    <style name="Theme.MagiskModuleManager.Monet.Black" parent="Theme.MagiskModuleManager.Monet.Dark">
+        <item name="colorBackgroundFloating">@color/black</item>
+        <item name="android:windowBackground">@color/black</item>
+        <item name="boxBackgroundColor">@color/black</item>
+        <item name="cardBackgroundColor">@color/black</item>
+        <item name="backgroundColor">@color/black</item>
+        <item name="colorSurface">@color/black</item>
+    </style>
+
     <style name="Widget.Material3.Chip.Choice.Dark" parent="Widget.Material3.Chip.Assist">
         <item name="chipBackgroundColor">@color/system_accent2_700</item>
         <item name="chipStrokeWidth">0dp</item>

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

@@ -188,4 +188,7 @@
     <string name="permission_notification_grant">Grant permission</string>
     <string name="background_update_check_permission_required">Please enable notifications to enable this option.</string>
     <string name="dont_ask_again">Don\'t ask again</string>
+    <string name="force_black_theme_desc">Forces AMOLED black backgrounds when using dark theme.
+        Please be aware this may have contrast problems with some color themes.</string>
+    <string name="force_black_theme_pref">Force black theme</string>
 </resources>

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

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme_MagiskModuleManager_ForceBlack">#000000</style>
+</resources>

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

@@ -83,6 +83,16 @@
         <item name="chipStyle">@style/Widget.Material.Chip.Choice.Dark</item>
     </style>
 
+    <!-- Black theme, which is just a dark theme with a black background -->
+    <style name="Theme.MagiskModuleManager.Black" parent="Theme.MagiskModuleManager.Dark">
+        <item name="colorBackgroundFloating">@color/black</item>
+        <item name="android:windowBackground">@color/black</item>
+        <item name="boxBackgroundColor">@color/black</item>
+        <item name="cardBackgroundColor">@color/black</item>
+        <item name="backgroundColor">@color/black</item>
+        <item name="colorSurface">@color/black</item>
+    </style>
+
     <style name="Widget.Material.Chip.Choice.Dark" parent="Widget.MaterialComponents.Chip.Action">
         <item name="chipBackgroundColor">@color/dark_chipBackgroundColor</item>
         <item name="chipStrokeWidth">0dp</item>

app/src/main/res/xml/root_preferences.xml

@@ -56,6 +56,15 @@
             app:singleLineTitle="false"
             app:title="@string/theme_pref" />
 
+        <!-- Force black theme -->
+        <SwitchPreferenceCompat
+            app:defaultValue="false"
+            app:icon="@drawable/ic_baseline_palette_24"
+            app:key="pref_force_black_theme"
+            app:singleLineTitle="false"
+            app:summary="@string/force_black_theme_desc"
+            app:title="@string/force_black_theme_pref" />
+
         <Preference
             app:icon="@drawable/ic_baseline_language_24"
             app:key="pref_language_selector"