Made Black UI an option to configure

app/src/main/java/com/termux/app/TermuxActivity.java

@@ -127,6 +127,8 @@ public final class TermuxActivity extends Activity implements ServiceConnection
      */
     boolean mIsVisible;
 
+    boolean mIsUsingBlackUI;
+
     final SoundPool mBellSoundPool = new SoundPool.Builder().setMaxStreams(1).setAudioAttributes(
         new AudioAttributes.Builder().setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
             .setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION).build()).build();
@@ -203,11 +205,24 @@ public final class TermuxActivity extends Activity implements ServiceConnection
 
     @Override
     public void onCreate(Bundle bundle) {
+        mSettings = new TermuxPreferences(this);
+        mIsUsingBlackUI = mSettings.isUsingBlackUI();
+        if (mIsUsingBlackUI) {
+            this.setTheme(R.style.Theme_Termux_Black);
+        } else {
+            this.setTheme(R.style.Theme_Termux);
+        }
+
         super.onCreate(bundle);
 
-        mSettings = new TermuxPreferences(this);
-
         setContentView(R.layout.drawer_layout);
+
+        if (mIsUsingBlackUI) {
+            findViewById(R.id.left_drawer).setBackgroundColor(
+                getResources().getColor(android.R.color.background_dark)
+            );
+        }
+
         mTerminalView = findViewById(R.id.terminal_view);
         mTerminalView.setOnKeyListener(new TermuxViewClient(this));
 
@@ -434,7 +449,11 @@ public final class TermuxActivity extends Activity implements ServiceConnection
                 boolean sessionRunning = sessionAtRow.isRunning();
 
                 TextView firstLineView = row.findViewById(R.id.row_line);
-
+                if (mIsUsingBlackUI) {
+                    firstLineView.setBackground(
+                        getResources().getDrawable(R.drawable.selected_session_background_black)
+                    );
+                }
                 String name = sessionAtRow.mSessionName;
                 String sessionTitle = sessionAtRow.getTitle();
 
@@ -454,7 +473,8 @@ public final class TermuxActivity extends Activity implements ServiceConnection
                 } else {
                     firstLineView.setPaintFlags(firstLineView.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
                 }
-                int color = sessionRunning || sessionAtRow.getExitStatus() == 0 ? Color.WHITE : Color.RED;
+                int defaultColor = mIsUsingBlackUI ? Color.WHITE : Color.BLACK;
+                int color = sessionRunning || sessionAtRow.getExitStatus() == 0 ? defaultColor : Color.RED;
                 firstLineView.setTextColor(color);
                 return row;
             }

app/src/main/java/com/termux/app/TermuxPreferences.java

@@ -58,6 +58,7 @@ final class TermuxPreferences {
     private static final String CURRENT_SESSION_KEY = "current_session";
     private static final String SCREEN_ALWAYS_ON_KEY = "screen_always_on";
 
+    private String mUseDarkUI;
     private boolean mScreenAlwaysOn;
     private int mFontSize;
 
@@ -126,6 +127,10 @@ final class TermuxPreferences {
         return mScreenAlwaysOn;
     }
 
+    boolean isUsingBlackUI() {
+        return mUseDarkUI.toLowerCase().equals("true");
+    }
+
     void setScreenAlwaysOn(Context context, boolean newValue) {
         mScreenAlwaysOn = newValue;
         PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean(SCREEN_ALWAYS_ON_KEY, newValue).apply();
@@ -173,6 +178,8 @@ final class TermuxPreferences {
                 break;
         }
 
+        mUseDarkUI = props.getProperty("use-black-ui", "false");
+
         try {
             JSONArray arr = new JSONArray(props.getProperty("extra-keys", "[['ESC', 'TAB', 'CTRL', 'ALT', '-', 'DOWN', 'UP']]"));
 

app/src/main/res/drawable/current_session.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
-    <solid android:color="#212325" />
+    <solid android:color="#E0E0E0" />
 </shape>

app/src/main/res/drawable/current_session_black.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+    <solid android:color="#212325" />
+</shape>

app/src/main/res/drawable/selected_session_background_black.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_activated="true" android:drawable="@drawable/current_session_black"/>
+    <item android:state_activated="false" android:drawable="@drawable/session_ripple_black"/>
+</selector>

app/src/main/res/drawable/session_ripple.xml

@@ -2,6 +2,6 @@
 <ripple xmlns:android="http://schemas.android.com/apk/res/android"
     android:color="@android:color/darker_gray" >
     <item>
-        <color android:color="@android:color/background_dark" />
+        <color android:color="@android:color/white" />
     </item>
 </ripple>

app/src/main/res/drawable/session_ripple_black.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+    android:color="@android:color/darker_gray" >
+    <item>
+        <color android:color="@android:color/background_dark" />
+    </item>
+</ripple>

app/src/main/res/layout/drawer_layout.xml

@@ -26,7 +26,7 @@
             android:layout_width="240dp"
             android:layout_height="match_parent"
             android:layout_gravity="start"
-            android:background="@android:color/background_dark"
+            android:background="@android:color/white"
             android:choiceMode="singleChoice"
             android:divider="@android:color/transparent"
             android:dividerHeight="0dp"

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

@@ -1,9 +1,34 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <style name="Theme.Termux" parent="@android:style/Theme.Material.Light.NoActionBar">
+        <item name="android:statusBarColor">#000000</item>
+        <item name="android:colorPrimary">#FF000000</item>
+        <item name="android:windowBackground">@android:color/black</item>
+
+        <!-- Seen in buttons on left drawer: -->
+        <item name="android:colorAccent">#212121</item>
+        <item name="android:alertDialogTheme">@style/TermuxAlertDialogStyle</item>
+        <!-- Avoid action mode toolbar pushing down terminal content when
+             selecting text on pre-6.0 (non-floating toolbar). -->
+        <item name="android:windowActionModeOverlay">true</item>
+
+        <item name="android:windowTranslucentStatus">true</item>
+        <item name="android:windowTranslucentNavigation">true</item>
+
+        <!-- https://developer.android.com/training/tv/start/start.html#transition-color -->
+        <item name="android:windowAllowReturnTransitionOverlap">true</item>
+        <item name="android:windowAllowEnterTransitionOverlap">true</item>
+    </style>
+
+    <style name="TermuxAlertDialogStyle" parent="@android:style/Theme.Material.Light.Dialog.Alert">
+        <!-- Seen in buttons on alert dialog: -->
+        <item name="android:colorAccent">#212121</item>
+    </style>
+
     <!-- See https://developer.android.com/training/material/theme.html for how to customize the Material theme. -->
     <!-- NOTE: Cannot use "Light." since it hides the terminal scrollbar on the default black background. -->
-    <style name="Theme.Termux" parent="@android:style/Theme.Material.NoActionBar">
+    <style name="Theme.Termux.Black" parent="@android:style/Theme.Material.NoActionBar">
         <item name="android:statusBarColor">#000000</item>
         <item name="android:colorPrimary">#FF000000</item>
         <item name="android:windowBackground">@android:color/black</item>