feature: discreet app icon

core/src/main/AndroidManifest.xml

@@ -61,21 +61,68 @@
         <activity
             android:name="net.ivpn.core.v2.MainActivity"
             android:screenOrientation="portrait"
-            android:exported="true"
+            android:exported="false"
             android:theme="@style/AppTheme.NoActionBar"
             android:windowSoftInputMode="adjustNothing"
             android:launchMode="singleInstance">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
 
             <meta-data
                 android:name="android.app.shortcuts"
                 android:resource="@xml/shortcuts" />
         </activity>
 
+        <!-- Activity aliases for app icon switching -->
+        <activity-alias
+            android:name="net.ivpn.client.MainActivity"
+            android:targetActivity="net.ivpn.core.v2.MainActivity"
+            android:label="@string/app_name"
+            android:icon="@mipmap/ic_launcher"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+
+        <activity-alias
+            android:name="net.ivpn.client.MainActivityWeather"
+            android:targetActivity="net.ivpn.core.v2.MainActivity"
+            android:label="@string/app_icon_name_weather"
+            android:icon="@mipmap/ic_launcher_weather"
+            android:enabled="false"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+
+        <activity-alias
+            android:name="net.ivpn.client.MainActivityNotes"
+            android:targetActivity="net.ivpn.core.v2.MainActivity"
+            android:label="@string/app_icon_name_notes"
+            android:icon="@mipmap/ic_launcher_notes"
+            android:enabled="false"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+
+        <activity-alias
+            android:name="net.ivpn.client.MainActivityCalculator"
+            android:targetActivity="net.ivpn.core.v2.MainActivity"
+            android:label="@string/app_icon_name_calculator"
+            android:icon="@mipmap/ic_launcher_calculator"
+            android:enabled="false"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity-alias>
+
         <activity
             android:name="net.ivpn.core.vpn.local.PermissionActivity"
             android:exported="false"

core/src/main/java/com/wireguard/android/config/Interface.java

@@ -222,7 +222,7 @@ private void setListenPortString(@Nullable final String port) {
             setListenPort(0);
     }
 
-    private void setMtu(final int mtu) {
+    public void setMtu(final int mtu) {
         this.mtu = mtu;
     }
 

core/src/main/java/net/ivpn/core/common/appicon/AppIconManager.kt

@@ -0,0 +1,97 @@
+package net.ivpn.core.common.appicon
+
+/*
+ IVPN Android app
+ https://github.com/ivpn/android-app
+
+ Created by Tamim Hossain.
+ Copyright (c) 2025 IVPN Limited.
+
+ This file is part of the IVPN Android app.
+
+ The IVPN Android app is free software: you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+ The IVPN Android app is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ details.
+
+ You should have received a copy of the GNU General Public License
+ along with the IVPN Android app. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.pm.PackageManager
+import androidx.annotation.DrawableRes
+import androidx.annotation.StringRes
+import net.ivpn.core.R
+import net.ivpn.core.common.dagger.ApplicationScope
+import javax.inject.Inject
+
+private const val ACTIVITY_ALIAS_PREFIX = "net.ivpn.client"
+
+@ApplicationScope
+class AppIconManager @Inject constructor(
+    private val context: Context
+) {
+
+    private var currentIcon: CustomAppIconData? = null
+
+    fun setNewAppIcon(desiredAppIcon: CustomAppIconData) {
+        val currentIconData = getCurrentIconData()
+
+        // Disable current icon
+        context.packageManager.setComponentEnabledSetting(
+            currentIconData.getComponentName(context),
+            PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+            PackageManager.DONT_KILL_APP
+        )
+
+        // Enable new icon
+        context.packageManager.setComponentEnabledSetting(
+            desiredAppIcon.getComponentName(context),
+            PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
+            PackageManager.DONT_KILL_APP
+        )
+
+        currentIcon = desiredAppIcon
+    }
+
+    fun getCurrentIconData(): CustomAppIconData {
+        currentIcon?.let { return it }
+
+        val activeIcon = CustomAppIconData.entries.firstOrNull {
+            context.packageManager.getComponentEnabledSetting(it.getComponentName(context)) == 
+                PackageManager.COMPONENT_ENABLED_STATE_ENABLED
+        }
+
+        currentIcon = activeIcon ?: CustomAppIconData.DEFAULT
+        return currentIcon!!
+    }
+}
+
+enum class CustomAppIconData(
+    private val componentName: String,
+    @DrawableRes val iconPreviewResId: Int,
+    @StringRes val labelResId: Int,
+    val category: IconCategory
+) {
+    DEFAULT(".MainActivity", R.mipmap.ic_launcher, R.string.app_icon_name_default, IconCategory.IVPN),
+    WEATHER(".MainActivityWeather", R.mipmap.ic_launcher_weather, R.string.app_icon_name_weather, IconCategory.Discreet),
+    NOTES(".MainActivityNotes", R.mipmap.ic_launcher_notes, R.string.app_icon_name_notes, IconCategory.Discreet),
+    CALCULATOR(".MainActivityCalculator", R.mipmap.ic_launcher_calculator, R.string.app_icon_name_calculator, IconCategory.Discreet);
+
+    fun getComponentName(context: Context): ComponentName {
+        val applicationContext = context.applicationContext
+        return ComponentName(applicationContext, ACTIVITY_ALIAS_PREFIX + componentName)
+    }
+
+    enum class IconCategory {
+        IVPN,
+        Discreet
+    }
+}
+

core/src/main/java/net/ivpn/core/common/dagger/ActivityComponent.java

@@ -29,6 +29,7 @@
 import net.ivpn.core.v2.account.AccountFragment;
 import net.ivpn.core.v2.account.LogOutFragment;
 import net.ivpn.core.v2.alwaysonvpn.AlwaysOnVPNFragment;
+import net.ivpn.core.v2.appicon.AppIconFragment;
 import net.ivpn.core.v2.antitracker.AntiTrackerFragment;
 import net.ivpn.core.v2.antitracker.AntiTrackerListFragment;
 import net.ivpn.core.v2.captcha.CaptchaFragment;
@@ -156,6 +157,8 @@ interface Factory {
 
     void inject(KillSwitchFragment fragment);
 
+    void inject(AppIconFragment fragment);
+
     void inject(MockLocationFragment fragment);
 
     void inject(MockLocationStep1Fragment fragment);

core/src/main/java/net/ivpn/core/common/nightmode/NightMode.kt

@@ -28,17 +28,20 @@ import net.ivpn.core.R
 enum class NightMode(val id: Int, val systemId: Int, val stringId: Int) {
     LIGHT(R.id.light_mode, AppCompatDelegate.MODE_NIGHT_NO, R.string.settings_color_theme_light),
     DARK(R.id.dark_mode, AppCompatDelegate.MODE_NIGHT_YES, R.string.settings_color_theme_dark),
+    AMOLED_BLACK(R.id.amoled_black_mode, AppCompatDelegate.MODE_NIGHT_YES, R.string.settings_color_theme_amoled_black),
     SYSTEM_DEFAULT(R.id.system_default_mode, AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM, R.string.settings_color_theme_system_default),
     BY_BATTERY_SAVER(R.id.set_by_battery_mode, AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY, R.string.settings_color_theme_system_by_battery);
 
+    val isOledBlack: Boolean
+        get() = this == AMOLED_BLACK
+
     companion object {
-        fun getById(id: Int) : NightMode {
-            for (mode in values()) {
+        fun getById(id: Int): NightMode {
+            for (mode in entries) {
                 if (mode.id == id) {
                     return mode
                 }
             }
-
             return LIGHT
         }
     }

core/src/main/java/net/ivpn/core/common/nightmode/OledModeController.kt

@@ -0,0 +1,172 @@
+package net.ivpn.core.common.nightmode
+
+/*
+ IVPN Android app
+ https://github.com/ivpn/android-app
+
+ Created by Tamim Hossain.
+ Copyright (c) 2025 IVPN Limited.
+
+ This file is part of the IVPN Android app.
+
+ The IVPN Android app is free software: you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+ The IVPN Android app is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ details.
+
+ You should have received a copy of the GNU General Public License
+ along with the IVPN Android app. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import android.app.Activity
+import android.content.res.ColorStateList
+import android.graphics.Color
+import android.graphics.drawable.ColorDrawable
+import android.graphics.drawable.GradientDrawable
+import android.graphics.drawable.LayerDrawable
+import android.os.Build
+import android.view.View
+import android.view.ViewGroup
+import android.view.Window
+import androidx.appcompat.widget.Toolbar
+import androidx.cardview.widget.CardView
+import com.google.android.material.appbar.AppBarLayout
+import com.google.android.material.floatingactionbutton.FloatingActionButton
+import com.google.android.material.tabs.TabLayout
+import net.ivpn.core.IVPNApplication
+import net.ivpn.core.R
+
+object OledModeController {
+
+    const val OLED_BLACK = Color.BLACK
+    const val OLED_CARD = 0xFF0A0A0A.toInt()
+    const val OLED_HANDLE = 0xFF666666.toInt()
+
+    private val darkGrayColors = setOf(
+        0xFF202020.toInt(),
+        0xFF1C1C1C.toInt(),
+        0xFF1C1C1E.toInt(),
+        0xFF121212.toInt(),
+        0xFF323232.toInt(),
+        0xFF383838.toInt(),
+        0xFF292929.toInt(),
+        0xFF181818.toInt(),
+        0xFF343332.toInt(),
+        0xFF060606.toInt()
+    )
+
+    private val handleColor = 0xFF49494B.toInt()
+
+    @JvmStatic
+    fun applyOledTheme(activity: Activity) {
+        if (isOledModeEnabled()) {
+            activity.setTheme(R.style.AppTheme_OLED)
+        }
+    }
+
+    fun applyOledColors(window: Window, rootView: View?) {
+        if (!isOledModeEnabled()) return
+
+        window.statusBarColor = OLED_BLACK
+        window.navigationBarColor = OLED_BLACK
+        window.decorView.setBackgroundColor(OLED_BLACK)
+        rootView?.let { applyOledToViewTree(it) }
+    }
+
+    fun applyOledToViewTree(view: View) {
+        if (!isOledModeEnabled()) return
+
+        val background = view.background?.mutate()
+        when (background) {
+            is ColorDrawable -> {
+                if (background.color in darkGrayColors) {
+                    view.setBackgroundColor(OLED_BLACK)
+                }
+            }
+            is GradientDrawable -> {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                    background.color?.defaultColor?.let { gradientColor ->
+                        when (gradientColor) {
+                            handleColor -> background.setColor(OLED_HANDLE)
+                            in darkGrayColors -> background.setColor(OLED_BLACK)
+                        }
+                    }
+                }
+            }
+            is LayerDrawable -> {
+                for (i in 0 until background.numberOfLayers) {
+                    val layer = background.getDrawable(i)?.mutate()
+                    if (layer is GradientDrawable && Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                        layer.color?.defaultColor?.let { layerColor ->
+                            when (layerColor) {
+                                handleColor -> layer.setColor(OLED_HANDLE)
+                                in darkGrayColors -> layer.setColor(OLED_BLACK)
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        if (view is CardView) {
+            val cardColor = view.cardBackgroundColor.defaultColor
+            if (cardColor in darkGrayColors) {
+                view.setCardBackgroundColor(OLED_CARD)
+            }
+        }
+
+        if (view is FloatingActionButton) {
+            val fabColor = view.backgroundTintList?.defaultColor ?: 0
+            if (fabColor in darkGrayColors) {
+                view.backgroundTintList = ColorStateList.valueOf(OLED_CARD)
+            }
+        }
+
+        if (view is Toolbar) {
+            view.setBackgroundColor(OLED_BLACK)
+        }
+
+        if (view is AppBarLayout) {
+            view.setBackgroundColor(OLED_BLACK)
+        }
+
+        if (view is TabLayout) {
+            view.setBackgroundColor(OLED_BLACK)
+        }
+
+        view.backgroundTintList?.let { tintList ->
+            val tintColor = tintList.defaultColor
+            if (tintColor in darkGrayColors) {
+                view.backgroundTintList = ColorStateList.valueOf(OLED_CARD)
+            }
+        }
+
+        if (view is ViewGroup) {
+            for (i in 0 until view.childCount) {
+                applyOledToViewTree(view.getChildAt(i))
+            }
+        }
+    }
+
+    fun getBackgroundColor(): Int {
+        return if (isOledModeEnabled()) OLED_BLACK else 0
+    }
+
+    fun getCardColor(): Int {
+        return if (isOledModeEnabled()) OLED_CARD else 0
+    }
+
+    fun isOledModeEnabled(): Boolean {
+        return try {
+            val settings = IVPNApplication.appComponent.provideSettings()
+            settings?.nightMode?.isOledBlack == true
+        } catch (e: Exception) {
+            false
+        }
+    }
+}
+