android: try to automatically create .nomedia file in directory where games are located

android/app/src/main/java/su/xash/engine/ui/library/LibraryViewModel.kt

@@ -12,6 +12,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import su.xash.engine.model.Game
+import su.xash.engine.util.Nomedia
 import java.io.File
 
 class LibraryViewModel(application: Application) : AndroidViewModel(application) {
@@ -39,6 +40,8 @@ class LibraryViewModel(application: Application) : AndroidViewModel(application)
 					?: (Environment.getExternalStorageDirectory().absolutePath + "/xash")
 				val root = File(rootPath)
 
+				Nomedia.ensureNomedia(root)
+
 				_installedGames.postValue(Game.getGames(ctx, root))
 				_isReloading.postValue(false)
 			}

android/app/src/main/java/su/xash/engine/util/Nomedia.kt

@@ -0,0 +1,42 @@
+/*
+Nomedia.kt - ensure that .nomedia file exists in directory
+Copyright (C) 2025 Alibek Omarov
+
+This program 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.
+
+This program 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.
+*/
+package su.xash.engine.util
+import java.io.File
+
+object Nomedia {
+	fun ensureNomedia(directory: File): Boolean {
+		try {
+			// ensure paths exists
+			if (!directory.exists() && !directory.mkdirs()) {
+				return false
+			}
+
+			// check if it's a directory
+			if (!directory.isDirectory) {
+				return false
+			}
+
+			val nomediaFile = File(directory, ".nomedia")
+
+			// it returns false if file already exists, which is fine for us
+			nomediaFile.createNewFile()
+
+			return true
+		} catch (e: Exception) {
+			e.printStackTrace()
+			return false
+		}
+	}
+}