Fixed: Improve dark mode support for settings and shared activities

Replace hardcoded light-only colors with theme attributes so that
SettingsActivity, ReportActivity, TextIOActivity, and message dialogs
follow the system dark mode setting. Also update toolbar styling to
use a neutral surface color instead of the red brand color, and wrap
the toolbar in AppBarLayout for proper elevation shadow.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: salmon-21

termux-shared/src/main/java/com/termux/shared/activities/TextIOActivity.java

@@ -24,9 +24,11 @@
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 
+import com.termux.shared.activity.media.AppCompatActivityUtils;
 import com.termux.shared.interact.ShareUtils;
 import com.termux.shared.logger.Logger;
 import com.termux.shared.R;
+import com.termux.shared.theme.NightMode;
 import com.termux.shared.models.TextIOInfo;
 import com.termux.shared.view.KeyboardUtils;
 
@@ -63,6 +65,8 @@ protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         Logger.logVerbose(LOG_TAG, "onCreate");
 
+        AppCompatActivityUtils.setNightMode(this, NightMode.getAppNightMode().getName(), true);
+
         setContentView(R.layout.activity_text_io);
 
         mTextIOLabel = findViewById(R.id.text_io_label);

termux-shared/src/main/java/com/termux/shared/interact/MessageDialogUtils.java

@@ -4,7 +4,7 @@
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
-import android.graphics.Color;
+import android.content.res.TypedArray;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.Button;
@@ -51,7 +51,7 @@ public static void showMessage(Context context, String titleText, String message
                                    final DialogInterface.OnClickListener onNegativeButton,
                                    final DialogInterface.OnDismissListener onDismiss) {
 
-        AlertDialog.Builder builder = new AlertDialog.Builder(context, androidx.appcompat.R.style.Theme_AppCompat_Light_Dialog);
+        AlertDialog.Builder builder = new AlertDialog.Builder(context, androidx.appcompat.R.style.Theme_AppCompat_DayNight_Dialog);
 
         LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
         View view = inflater.inflate(R.layout.dialog_show_message, null);
@@ -81,12 +81,17 @@ public static void showMessage(Context context, String titleText, String message
 
         dialog.setOnShowListener(dialogInterface -> {
             Logger.logError("dialog");
+            int[] attrs = new int[] { android.R.attr.textColorPrimary };
+            TypedArray ta = context.obtainStyledAttributes(attrs);
+            int textColor = ta.getColor(0, 0xFF000000);
+            ta.recycle();
+
             Button button = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
             if (button != null)
-                button.setTextColor(Color.BLACK);
+                button.setTextColor(textColor);
             button = dialog.getButton(AlertDialog.BUTTON_NEGATIVE);
             if (button != null)
-                button.setTextColor(Color.BLACK);
+                button.setTextColor(textColor);
         });
 
         dialog.show();

termux-shared/src/main/res/layout/dialog_show_message.xml

@@ -17,7 +17,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:textAppearance="@style/TextAppearance.AppCompat.Title"
-            android:textColor="@android:color/white"/>
+            android:textColor="?android:attr/textColorPrimaryInverse"/>
     </LinearLayout>
 
     <ScrollView
@@ -37,8 +37,8 @@
                 android:layout_height="wrap_content"
                 android:autoLink="web|email"
                 android:textSize="14sp"
-                android:textColor="@android:color/tab_indicator_text"
-                android:textColorLink="@android:color/black"/>
+                android:textColor="?android:attr/textColorPrimary"
+                android:textColorLink="?android:attr/textColorLink"/>
         </LinearLayout>
     </ScrollView>
 

termux-shared/src/main/res/layout/partial_primary_toolbar.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<com.google.android.material.appbar.AppBarLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/toolbar_container"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:orientation="vertical">
+    android:layout_height="wrap_content">
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/toolbar"
@@ -19,4 +19,4 @@
         app:subtitleTextAppearance="@style/TextAppearance.Widget.BaseToolbar.Subtitle">
     </androidx.appcompat.widget.Toolbar>
 
-</LinearLayout>
+</com.google.android.material.appbar.AppBarLayout>

termux-shared/src/main/res/values-night/colors.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="background_markdown_code_inline">#1FFFFFFF</color>
+    <color name="background_markdown_code_block">#0FFFFFFF</color>
+</resources>

termux-shared/src/main/res/values-night/themes.xml

@@ -9,15 +9,18 @@
     -->
     <style name="Theme.BaseActivity.DayNight.DarkActionBar" parent="Theme.MaterialComponents">
         <!-- Primary brand color. -->
-        <item name="colorPrimary">@color/red_400</item>
-        <item name="colorPrimaryVariant">@color/red_800</item>
-        <item name="colorOnPrimary">@color/black</item>
+        <item name="colorPrimary">@color/grey_900</item>
+        <item name="colorPrimaryVariant">@color/black</item>
+        <item name="colorOnPrimary">@color/white</item>
 
         <!-- Secondary brand color. -->
         <item name="colorSecondary">@color/grey_400</item>
         <item name="colorSecondaryVariant">@color/grey_500</item>
         <item name="colorOnSecondary">@color/black</item>
 
+        <!-- Accent color for widgets (switches, checkboxes, etc.). -->
+        <item name="colorAccent">@color/red_400</item>
+
         <!-- Status bar color. -->
         <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
         <item name="colorPrimaryDark" tools:targetApi="l">?attr/colorPrimary</item>

termux-shared/src/main/res/values/themes.xml

@@ -20,9 +20,12 @@
         <item name="colorSecondaryVariant">@color/black</item>
         <item name="colorOnSecondary">@color/white</item>
 
+        <!-- Toolbar / ActionBar background color. -->
+        <item name="colorPrimaryDark" tools:targetApi="l">@color/white</item>
+
         <!-- Status bar color. -->
-        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
-        <item name="colorPrimaryDark" tools:targetApi="l">?attr/colorPrimary</item>
+        <item name="android:statusBarColor" tools:targetApi="l">@color/white</item>
+        <item name="android:windowLightStatusBar" tools:targetApi="m">true</item>
 
         <!-- Text color. -->
         <item name="android:textColorPrimary">@color/black</item>