android: splash screen with background color on Android 12+ (#3579)

apps/multiplatform/android/src/main/AndroidManifest.xml

@@ -39,6 +39,7 @@
         android:exported="true"
         android:label="${app_name}"
         android:windowSoftInputMode="adjustResize"
+        android:configChanges="uiMode"
         android:theme="@style/Theme.SimpleX">
       <intent-filter>
         <category android:name="android.intent.category.LAUNCHER" />

apps/multiplatform/android/src/main/java/chat/simplex/app/MainActivity.kt

@@ -5,6 +5,7 @@ import android.net.Uri
 import android.os.*
 import android.view.WindowManager
 import androidx.activity.compose.setContent
+import androidx.appcompat.app.AppCompatDelegate
 import androidx.fragment.app.FragmentActivity
 import chat.simplex.app.model.NtfManager
 import chat.simplex.app.model.NtfManager.getUserIdFromIntent
@@ -22,6 +23,7 @@ import java.lang.ref.WeakReference
 class MainActivity: FragmentActivity() {
 
   override fun onCreate(savedInstanceState: Bundle?) {
+    platform.androidSetNightModeIfSupported()
     applyAppLocale(ChatModel.controller.appPrefs.appLanguage)
     super.onCreate(savedInstanceState)
     // testJson()

apps/multiplatform/android/src/main/java/chat/simplex/app/SimplexApp.kt

@@ -1,9 +1,8 @@
 package chat.simplex.app
 
 import android.app.Application
-import android.os.Handler
-import android.os.Looper
-import chat.simplex.common.platform.Log
+import android.app.UiModeManager
+import android.os.*
 import androidx.lifecycle.*
 import androidx.work.*
 import chat.simplex.app.model.NtfManager
@@ -12,10 +11,12 @@ import chat.simplex.common.helpers.requiresIgnoringBattery
 import chat.simplex.common.model.*
 import chat.simplex.common.model.ChatController.appPrefs
 import chat.simplex.common.model.ChatModel.updatingChatsMutex
+import chat.simplex.common.platform.*
+import chat.simplex.common.ui.theme.CurrentColors
+import chat.simplex.common.ui.theme.DefaultTheme
+import chat.simplex.common.views.call.RcvCallInvitation
 import chat.simplex.common.views.helpers.*
 import chat.simplex.common.views.onboarding.OnboardingStage
-import chat.simplex.common.platform.*
-import chat.simplex.common.views.call.RcvCallInvitation
 import com.jakewharton.processphoenix.ProcessPhoenix
 import kotlinx.coroutines.*
 import kotlinx.coroutines.sync.withLock
@@ -225,6 +226,23 @@ class SimplexApp: Application(), LifecycleEventObserver {
 
       override fun androidIsBackgroundCallAllowed(): Boolean = !SimplexService.isBackgroundRestricted()
 
+      override fun androidSetNightModeIfSupported() {
+        if (Build.VERSION.SDK_INT < 31) return
+
+        val light = if (CurrentColors.value.name == DefaultTheme.SYSTEM.name) {
+          null
+        } else {
+          CurrentColors.value.colors.isLight
+        }
+        val mode = when (light) {
+          null -> UiModeManager.MODE_NIGHT_AUTO
+          true -> UiModeManager.MODE_NIGHT_NO
+          false -> UiModeManager.MODE_NIGHT_YES
+        }
+        val uiModeManager = androidAppContext.getSystemService(UI_MODE_SERVICE) as UiModeManager
+        uiModeManager.setApplicationNightMode(mode)
+      }
+
       override suspend fun androidAskToAllowBackgroundCalls(): Boolean {
         if (SimplexService.isBackgroundRestricted()) {
           val userChoice: CompletableDeferred<Boolean> = CompletableDeferred()

apps/multiplatform/android/src/main/res/values-night/themes.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+  <style name="Theme.SimpleX" parent="Theme.AppCompat.DayNight.NoActionBar">
+    <item name="android:statusBarColor">@color/black</item>
+    <item name="android:windowBackground">@color/window_background_dark</item>
+  </style>
+</resources>

apps/multiplatform/android/src/main/res/values/themes.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-  <style name="Theme.SimpleX" parent="android:Theme.Material.Light.NoActionBar">
+  <style name="Theme.SimpleX" parent="Theme.AppCompat.DayNight.NoActionBar">
     <item name="android:statusBarColor">@color/black</item>
   </style>
 </resources>

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/Platform.kt

@@ -10,6 +10,7 @@ interface PlatformInterface {
   fun androidChatStopped() {}
   fun androidChatInitializedAndStarted() {}
   fun androidIsBackgroundCallAllowed(): Boolean = true
+  fun androidSetNightModeIfSupported() {}
   suspend fun androidAskToAllowBackgroundCalls(): Boolean = true
 }
 /**

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/ui/theme/ThemeManager.kt

@@ -7,6 +7,7 @@ import androidx.compose.ui.text.font.FontFamily
 import chat.simplex.res.MR
 import chat.simplex.common.model.AppPreferences
 import chat.simplex.common.model.ChatController
+import chat.simplex.common.platform.platform
 import chat.simplex.common.views.helpers.generalGetString
 
 // https://github.com/rsms/inter
@@ -96,6 +97,7 @@ object ThemeManager {
   fun applyTheme(theme: String, darkForSystemTheme: Boolean) {
     appPrefs.currentTheme.set(theme)
     CurrentColors.value = currentColors(darkForSystemTheme)
+    platform.androidSetNightModeIfSupported()
   }
 
   fun changeDarkTheme(theme: String, darkForSystemTheme: Boolean) {