show the cached folders immediately as possible copy/move destinations at the dialog

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

@@ -13,7 +13,6 @@ import android.support.v7.widget.GridLayoutManager
 import android.view.Menu
 import android.view.MenuItem
 import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.models.Release
 import com.simplemobiletools.gallery.BuildConfig
@@ -21,10 +20,7 @@ import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.adapters.DirectoryAdapter
 import com.simplemobiletools.gallery.asynctasks.GetDirectoriesAsynctask
 import com.simplemobiletools.gallery.dialogs.ChangeSortingDialog
-import com.simplemobiletools.gallery.extensions.config
-import com.simplemobiletools.gallery.extensions.launchAbout
-import com.simplemobiletools.gallery.extensions.launchCamera
-import com.simplemobiletools.gallery.extensions.launchSettings
+import com.simplemobiletools.gallery.extensions.*
 import com.simplemobiletools.gallery.helpers.*
 import com.simplemobiletools.gallery.models.Directory
 import com.simplemobiletools.gallery.views.MyScalableRecyclerView
@@ -159,9 +155,8 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
             return
 
         mIsGettingDirs = true
-        val token = object : TypeToken<List<Directory>>() {}.type
-        val dirs = Gson().fromJson<ArrayList<Directory>>(config.directories, token) ?: ArrayList<Directory>(1)
-        if (dirs.size != 0 && !mLoadedInitialPhotos) {
+        val dirs = getCachedDirectories()
+        if (dirs.isNotEmpty() && !mLoadedInitialPhotos) {
             gotDirectories(dirs)
         }
 

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

@@ -221,7 +221,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
         mIsGettingMedia = true
         val token = object : TypeToken<List<Medium>>() {}.type
         val media = Gson().fromJson<ArrayList<Medium>>(config.loadFolderMedia(mPath), token) ?: ArrayList<Medium>(1)
-        if (media.size == 0 && !mLoadedInitialPhotos) {
+        if (media.isNotEmpty() && !mLoadedInitialPhotos) {
             gotMedia(media)
         }
 

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

@@ -11,33 +11,33 @@ import com.simplemobiletools.gallery.activities.SimpleActivity
 import com.simplemobiletools.gallery.adapters.DirectoryAdapter
 import com.simplemobiletools.gallery.asynctasks.GetDirectoriesAsynctask
 import com.simplemobiletools.gallery.extensions.config
+import com.simplemobiletools.gallery.extensions.getCachedDirectories
+import com.simplemobiletools.gallery.models.Directory
 import kotlinx.android.synthetic.main.dialog_album_picker.view.*
 
 class PickAlbumDialog(val activity: SimpleActivity, val sourcePath: String, val callback: (path: String) -> Unit) {
+    var dialog: AlertDialog
     var directoriesGrid: RecyclerView
+    var shownDirectories: ArrayList<Directory> = ArrayList()
 
     init {
         val view = LayoutInflater.from(activity).inflate(R.layout.dialog_album_picker, null)
         directoriesGrid = view.directories_grid
 
-        AlertDialog.Builder(activity)
+        dialog = AlertDialog.Builder(activity)
                 .setPositiveButton(R.string.ok, null)
                 .setNegativeButton(R.string.cancel, null)
                 .setNeutralButton(R.string.other_folder, { dialogInterface, i -> showOtherFolder() })
                 .create().apply {
             activity.setupDialogStuff(view, this, R.string.select_destination)
 
+            val dirs = activity.getCachedDirectories()
+            if (dirs.isNotEmpty()) {
+                gotDirectories(dirs)
+            }
+
             GetDirectoriesAsynctask(activity, false, false) {
-                val adapter = DirectoryAdapter(activity, it, null) {
-                    if (it.path.trimEnd('/') == sourcePath) {
-                        activity.toast(R.string.source_and_destination_same)
-                        return@DirectoryAdapter
-                    } else {
-                        callback.invoke(it.path)
-                        dismiss()
-                    }
-                }
-                directoriesGrid.adapter = adapter
+                gotDirectories(it)
             }.execute()
         }
     }
@@ -48,4 +48,21 @@ class PickAlbumDialog(val activity: SimpleActivity, val sourcePath: String, val
             callback.invoke(it)
         }
     }
+
+    private fun gotDirectories(directories: ArrayList<Directory>) {
+        if (directories.hashCode() == shownDirectories.hashCode())
+            return
+
+        shownDirectories = directories
+        val adapter = DirectoryAdapter(activity, directories, null) {
+            if (it.path.trimEnd('/') == sourcePath) {
+                activity.toast(R.string.source_and_destination_same)
+                return@DirectoryAdapter
+            } else {
+                callback.invoke(it.path)
+                dialog.dismiss()
+            }
+        }
+        directoriesGrid.adapter = adapter
+    }
 }

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

@@ -14,6 +14,8 @@ import com.bumptech.glide.Glide
 import com.bumptech.glide.load.DecodeFormat
 import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.bumptech.glide.signature.StringSignature
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.*
 import com.simplemobiletools.gallery.BuildConfig
@@ -22,6 +24,7 @@ import com.simplemobiletools.gallery.activities.SimpleActivity
 import com.simplemobiletools.gallery.helpers.NOMEDIA
 import com.simplemobiletools.gallery.helpers.REQUEST_EDIT_IMAGE
 import com.simplemobiletools.gallery.helpers.REQUEST_SET_WALLPAPER
+import com.simplemobiletools.gallery.models.Directory
 import com.simplemobiletools.gallery.models.Medium
 import com.simplemobiletools.gallery.views.MySquareImageView
 import java.io.File
@@ -253,3 +256,8 @@ fun Activity.loadStaticGif(path: String, target: MySquareImageView) {
     if (config.cropThumbnails) builder.centerCrop() else builder.fitCenter()
     builder.into(target)
 }
+
+fun Activity.getCachedDirectories(): ArrayList<Directory> {
+    val token = object : TypeToken<List<Directory>>() {}.type
+    return Gson().fromJson<ArrayList<Directory>>(config.directories, token) ?: ArrayList<Directory>(1)
+}