replace the Shared Prefs way of storing directories by Room

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

@@ -274,9 +274,12 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
         }
 
         mIsGettingDirs = true
-        val dirs = getCachedDirectories()
+        if (!mLoadedInitialPhotos) {
-        if (dirs.isNotEmpty() && !mLoadedInitialPhotos) {
+            getCachedDirectories {
-            gotDirectories(dirs, true)
+                if (it.isNotEmpty()) {
+                    gotDirectories(it, true)
+                }
+            }
         }
 
         if (!mLoadedInitialPhotos) {

app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/PickDirectoryDialog.kt

@@ -40,9 +40,10 @@ class PickDirectoryDialog(val activity: BaseSimpleActivity, val sourcePath: Stri
                     activity.setupDialogStuff(view, this, R.string.select_destination)
                 }
 
-        val dirs = activity.getCachedDirectories()
+        activity.getCachedDirectories {
-        if (dirs.isNotEmpty()) {
+            if (it.isNotEmpty()) {
-            gotDirectories(activity.addTempFolderIfNeeded(dirs))
+                gotDirectories(activity.addTempFolderIfNeeded(it))
+            }
         }
 
         GetDirectoriesAsynctask(activity, false, false) {

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

@@ -244,9 +244,10 @@ fun Activity.loadJpg(path: String, target: MySquareImageView, cropThumbnails: Bo
     builder.apply(options).transition(DrawableTransitionOptions.withCrossFade()).into(target)
 }
 
-fun Activity.getCachedDirectories(): ArrayList<Directory> {
+fun Activity.getCachedDirectories(callback: (ArrayList<Directory>) -> Unit) {
-    val token = object : TypeToken<List<Directory>>() {}.type
+    Thread {
-    return Gson().fromJson<ArrayList<Directory>>(config.directories, token) ?: ArrayList(1)
+        callback(galleryDB.DirectoryDao().getAll() as ArrayList<Directory>)
+    }.start()
 }
 
 fun Activity.getCachedMedia(path: String): ArrayList<Medium> {

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

@@ -19,7 +19,6 @@ import com.simplemobiletools.gallery.asynctasks.GetMediaAsynctask
 import com.simplemobiletools.gallery.databases.GalleryDataBase
 import com.simplemobiletools.gallery.helpers.Config
 import com.simplemobiletools.gallery.helpers.NOMEDIA
-import com.simplemobiletools.gallery.helpers.SAVE_DIRS_CNT
 import com.simplemobiletools.gallery.helpers.SAVE_MEDIA_CNT
 import com.simplemobiletools.gallery.models.Directory
 import com.simplemobiletools.gallery.models.Medium
@@ -163,8 +162,9 @@ fun Context.updateStoredDirectories() {
 }
 
 fun Context.storeDirectoryItems(items: ArrayList<Directory>) {
-    val subList = items.subList(0, Math.min(SAVE_DIRS_CNT, items.size))
+    Thread {
-    config.directories = Gson().toJson(subList)
+        galleryDB.DirectoryDao().insertAll(items)
+    }.start()
 }
 
 fun Context.checkAppendingHidden(path: String, hidden: String, includedFolders: MutableSet<String>): String {

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

@@ -239,10 +239,6 @@ class Config(context: Context) : BaseConfig(context) {
     private fun getDefaultMediaColumnCount() = context.resources.getInteger(if (scrollHorizontally) R.integer.media_columns_horizontal_scroll
     else R.integer.media_columns_vertical_scroll)
 
-    var directories: String
-        get() = prefs.getString(DIRECTORIES, "")
-        set(directories) = prefs.edit().putString(DIRECTORIES, directories).apply()
-
     var albumCovers: String
         get() = prefs.getString(ALBUM_COVERS, "")
         set(albumCovers) = prefs.edit().putString(ALBUM_COVERS, albumCovers).apply()

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

@@ -67,7 +67,6 @@ const val MAX_COLUMN_COUNT = 20
 const val SHOW_TEMP_HIDDEN_DURATION = 600000L
 const val CLICK_MAX_DURATION = 150
 const val DRAG_THRESHOLD = 8
-const val SAVE_DIRS_CNT = 60
 const val SAVE_MEDIA_CNT = 80
 
 const val DIRECTORY = "directory"
@@ -77,7 +76,6 @@ const val GET_IMAGE_INTENT = "get_image_intent"
 const val GET_VIDEO_INTENT = "get_video_intent"
 const val GET_ANY_INTENT = "get_any_intent"
 const val SET_WALLPAPER_INTENT = "set_wallpaper_intent"
-const val DIRECTORIES = "directories2"
 const val IS_VIEW_INTENT = "is_view_intent"
 const val PICKED_PATHS = "picked_paths"
 

app/src/main/kotlin/com/simplemobiletools/gallery/receivers/RefreshMediaReceiver.kt

@@ -3,16 +3,13 @@ package com.simplemobiletools.gallery.receivers
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
-import com.google.gson.Gson
 import com.simplemobiletools.gallery.asynctasks.GetDirectoriesAsynctask
-import com.simplemobiletools.gallery.extensions.config
+import com.simplemobiletools.gallery.extensions.storeDirectoryItems
-import com.simplemobiletools.gallery.helpers.SAVE_DIRS_CNT
 
 class RefreshMediaReceiver : BroadcastReceiver() {
     override fun onReceive(context: Context, intent: Intent) {
         GetDirectoriesAsynctask(context, false, false) {
-            val subList = it.subList(0, Math.min(SAVE_DIRS_CNT, it.size))
+            context.storeDirectoryItems(it)
-            context.config.directories = Gson().toJson(subList)
         }.execute()
     }
 }