adding a couple improvements related to un/hiding folders

app/src/main/kotlin/com/simplemobiletools/gallery/activities/MainActivity.kt

@@ -686,6 +686,7 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
             gotDirectories(directories, true)
         } else {
             mDirs = directories
+            storeDirectories()
         }
     }
 

app/src/main/kotlin/com/simplemobiletools/gallery/adapters/DirectoryAdapter.kt

@@ -181,26 +181,20 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
 
     private fun toggleFoldersVisibility(hide: Boolean) {
         getSelectedPaths().forEach {
+            val path = it
             if (hide) {
                 if (config.wasHideFolderTooltipShown) {
-                    hideFolder(it)
+                    hideFolder(path)
                 } else {
                     config.wasHideFolderTooltipShown = true
                     ConfirmationDialog(activity, activity.getString(R.string.hide_folder_description)) {
-                        hideFolder(it)
+                        hideFolder(path)
                     }
                 }
             } else {
-                activity.removeNoMedia(it) {
+                activity.removeNoMedia(path) {
                     if (activity.config.shouldShowHidden) {
-                        dirs.forEachIndexed { index, directory ->
-                            if (directory.path.startsWith(it, true)) {
-                                val hidden = activity.getString(R.string.hidden)
-                                directory.name = directory.name.removeSuffix(hidden).trim()
-                            }
-                        }
-                        updateDirs(dirs)
-                        listener?.updateDirectories(dirs.toList() as ArrayList, true)
+                        updateFolderNames()
                     } else {
                         activity.runOnUiThread {
                             listener?.refreshItems()
@@ -212,17 +206,22 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
         }
     }
 
+    private fun updateFolderNames() {
+        val includedFolders = activity.config.includedFolders
+        val hidden = activity.getString(R.string.hidden)
+        dirs.forEach {
+            it.name = activity.checkAppendingHidden(it.path, hidden, includedFolders)
+        }
+        listener?.updateDirectories(dirs.toList() as ArrayList, false)
+        activity.runOnUiThread {
+            updateDirs(dirs)
+        }
+    }
+
     private fun hideFolder(path: String) {
         activity.addNoMedia(path) {
             if (activity.config.shouldShowHidden) {
-                val hidden = activity.getString(R.string.hidden)
-                dirs.forEachIndexed { index, directory ->
-                    if (directory.path.startsWith(path, true)) {
-                        directory.name += " $hidden"
-                    }
-                }
-                updateDirs(dirs)
-                listener?.updateDirectories(dirs.toList() as ArrayList, true)
+                updateFolderNames()
             } else {
                 val affectedPositions = ArrayList<Int>()
                 val newDirs = dirs.filterIndexed { index, directory ->

app/src/main/kotlin/com/simplemobiletools/gallery/asynctasks/GetDirectoriesAsynctask.kt

@@ -7,8 +7,8 @@ import com.simplemobiletools.commons.helpers.OTG_PATH
 import com.simplemobiletools.commons.helpers.PERMISSION_WRITE_STORAGE
 import com.simplemobiletools.commons.helpers.SORT_DESCENDING
 import com.simplemobiletools.gallery.R
+import com.simplemobiletools.gallery.extensions.checkAppendingHidden
 import com.simplemobiletools.gallery.extensions.config
-import com.simplemobiletools.gallery.extensions.doesParentHaveNoMedia
 import com.simplemobiletools.gallery.extensions.sumByLong
 import com.simplemobiletools.gallery.helpers.MediaFetcher
 import com.simplemobiletools.gallery.models.Directory
@@ -50,23 +50,7 @@ class GetDirectoriesAsynctask(val context: Context, val isPickVideo: Boolean, va
                 }
             }
 
-            var dirName = when (parentDir) {
-                context.internalStoragePath -> context.getString(R.string.internal)
-                context.sdCardPath -> context.getString(R.string.sd_card)
-                OTG_PATH -> context.getString(R.string.otg)
-                else -> {
-                    if (parentDir.startsWith(OTG_PATH)) {
-                        parentDir.trimEnd('/').substringAfterLast('/')
-                    } else {
-                        parentDir.getFilenameFromPath()
-                    }
-                }
-            }
-
-            if (File(parentDir).doesParentHaveNoMedia() && !includedFolders.contains(parentDir)) {
-                dirName += " $hidden"
-            }
-
+            val dirName = context.checkAppendingHidden(parentDir, hidden, includedFolders)
             val lastModified = if (config.directorySorting and SORT_DESCENDING > 0) Math.max(firstItem.modified, lastItem.modified) else Math.min(firstItem.modified, lastItem.modified)
             val dateTaken = if (config.directorySorting and SORT_DESCENDING > 0) Math.max(firstItem.taken, lastItem.taken) else Math.min(firstItem.taken, lastItem.taken)
             val size = curMedia.sumByLong { it.size }

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/Activity.kt

@@ -120,25 +120,34 @@ fun BaseSimpleActivity.addNoMedia(path: String, callback: () -> Unit) {
             val fileDocument = getDocumentFile(path)
             if (fileDocument?.exists() == true && fileDocument.isDirectory) {
                 fileDocument.createFile("", NOMEDIA)
+                applicationContext.scanFile(file) {
+                    callback()
+                }
             } else {
                 toast(R.string.unknown_error_occurred)
+                callback()
             }
         }
     } else {
         try {
             file.createNewFile()
+            applicationContext.scanFile(file) {
+                callback()
+            }
         } catch (e: Exception) {
             showErrorToast(e)
+            callback()
         }
     }
-
-    applicationContext.scanFile(file) {
-        callback()
-    }
 }
 
 fun BaseSimpleActivity.removeNoMedia(path: String, callback: (() -> Unit)? = null) {
     val file = File(path, NOMEDIA)
+    if (!file.exists()) {
+        callback?.invoke()
+        return
+    }
+
     deleteFile(file.toFileDirItem(applicationContext)) {
         callback?.invoke()
     }

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/Context.kt

@@ -10,9 +10,9 @@ import android.os.Build
 import android.provider.MediaStore
 import android.view.WindowManager
 import com.google.gson.Gson
-import com.simplemobiletools.commons.extensions.getStringValue
-import com.simplemobiletools.commons.extensions.humanizePath
+import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.OTG_PATH
+import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.activities.SettingsActivity
 import com.simplemobiletools.gallery.asynctasks.GetDirectoriesAsynctask
 import com.simplemobiletools.gallery.asynctasks.GetMediaAsynctask
@@ -163,3 +163,24 @@ fun Context.storeDirectoryItems(items: ArrayList<Directory>) {
     val subList = items.subList(0, Math.min(SAVE_DIRS_CNT, items.size))
     config.directories = Gson().toJson(subList)
 }
+
+fun Context.checkAppendingHidden(path: String, hidden: String, includedFolders: MutableSet<String>): String {
+    val dirName = when (path) {
+        internalStoragePath -> getString(R.string.internal)
+        sdCardPath -> getString(R.string.sd_card)
+        OTG_PATH -> getString(R.string.otg)
+        else -> {
+            if (path.startsWith(OTG_PATH)) {
+                path.trimEnd('/').substringAfterLast('/')
+            } else {
+                path.getFilenameFromPath()
+            }
+        }
+    }
+
+    return if (File(path).doesThisOrParentHaveNoMedia() && !includedFolders.contains(path)) {
+        "$dirName $hidden"
+    } else {
+        dirName
+    }
+}

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/File.kt

@@ -5,13 +5,13 @@ import java.io.File
 
 fun File.containsNoMedia() = isDirectory && File(this, NOMEDIA).exists()
 
-fun File.doesParentHaveNoMedia(): Boolean {
+fun File.doesThisOrParentHaveNoMedia(): Boolean {
     var curFile = this
     while (true) {
         if (curFile.containsNoMedia()) {
             return true
         }
-        curFile = curFile.parentFile
+        curFile = curFile.parentFile ?: break
         if (curFile.absolutePath == "/") {
             break
         }

app/src/main/kotlin/com/simplemobiletools/gallery/helpers/MediaFetcher.kt

@@ -9,7 +9,7 @@ import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.*
 import com.simplemobiletools.gallery.extensions.config
 import com.simplemobiletools.gallery.extensions.containsNoMedia
-import com.simplemobiletools.gallery.extensions.doesParentHaveNoMedia
+import com.simplemobiletools.gallery.extensions.doesThisOrParentHaveNoMedia
 import com.simplemobiletools.gallery.extensions.isPathInMediaStore
 import com.simplemobiletools.gallery.models.Medium
 import java.io.File
@@ -253,7 +253,7 @@ class MediaFetcher(val context: Context) {
         } else if (!showHidden && file.isDirectory && file.canonicalFile == file.absoluteFile) {
             var containsNoMediaOrDot = file.containsNoMedia() || path.contains("/.")
             if (!containsNoMediaOrDot) {
-                containsNoMediaOrDot = file.doesParentHaveNoMedia()
+                containsNoMediaOrDot = file.doesThisOrParentHaveNoMedia()
             }
             !containsNoMediaOrDot
         } else {