optimize some things at the directory and media adapter

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

@@ -61,11 +61,11 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
     override fun getItemCount() = dirs.size
 
     override fun prepareActionMode(menu: Menu) {
-        if (getSelectedPaths().isEmpty()) {
+        val selectedPaths = getSelectedPaths()
+        if (selectedPaths.isEmpty()) {
             return
         }
 
-        val selectedPaths = getSelectedPaths()
         menu.apply {
             findItem(R.id.cab_rename).isVisible = isOneItemSelected() && !selectedPaths.contains(FAVORITES) && !selectedPaths.contains(RECYCLE_BIN)
             findItem(R.id.cab_change_cover_image).isVisible = isOneItemSelected()
@@ -73,8 +73,8 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
             findItem(R.id.cab_empty_recycle_bin).isVisible = isOneItemSelected() && selectedPaths.first() == RECYCLE_BIN
             findItem(R.id.cab_empty_disable_recycle_bin).isVisible = isOneItemSelected() && selectedPaths.first() == RECYCLE_BIN
 
-            checkHideBtnVisibility(this)
+            checkHideBtnVisibility(this, selectedPaths)
-            checkPinBtnVisibility(this)
+            checkPinBtnVisibility(this, selectedPaths)
         }
     }
 
@@ -117,10 +117,10 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
         }
     }
 
-    private fun checkHideBtnVisibility(menu: Menu) {
+    private fun checkHideBtnVisibility(menu: Menu, selectedPaths: ArrayList<String>) {
         var hiddenCnt = 0
         var unhiddenCnt = 0
-        getSelectedPaths().forEach {
+        selectedPaths.forEach {
             if (File(it).doesThisOrParentHaveNoMedia()) {
                 hiddenCnt++
             } else {
@@ -132,11 +132,11 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
         menu.findItem(R.id.cab_unhide).isVisible = hiddenCnt > 0
     }
 
-    private fun checkPinBtnVisibility(menu: Menu) {
+    private fun checkPinBtnVisibility(menu: Menu, selectedPaths: ArrayList<String>) {
         val pinnedFolders = config.pinnedFolders
         var pinnedCnt = 0
         var unpinnedCnt = 0
-        getSelectedPaths().forEach {
+        selectedPaths.forEach {
             if (pinnedFolders.contains(it)) {
                 pinnedCnt++
             } else {

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

@@ -103,14 +103,20 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
     }
 
     override fun prepareActionMode(menu: Menu) {
+        val selectedItems = getSelectedItems()
+        if (selectedItems.isEmpty()) {
+            return
+        }
+
+        val selectedPaths = selectedItems.map { it.path } as ArrayList<String>
         menu.apply {
-            findItem(R.id.cab_rename).isVisible = isOneItemSelected() && getSelectedItems().firstOrNull()?.getIsInRecycleBin() == false
+            findItem(R.id.cab_rename).isVisible = isOneItemSelected() && selectedItems.firstOrNull()?.getIsInRecycleBin() == false
             findItem(R.id.cab_open_with).isVisible = isOneItemSelected()
             findItem(R.id.cab_confirm_selection).isVisible = isAGetIntent && allowMultiplePicks && selectedKeys.size > 0
-            findItem(R.id.cab_restore_recycle_bin_files).isVisible = getSelectedPaths().all { it.startsWith(activity.filesDir.absolutePath) }
+            findItem(R.id.cab_restore_recycle_bin_files).isVisible = selectedPaths.all { it.startsWith(activity.filesDir.absolutePath) }
 
-            checkHideBtnVisibility(this)
+            checkHideBtnVisibility(this, selectedItems)
-            checkFavoriteBtnVisibility(this)
+            checkFavoriteBtnVisibility(this, selectedItems)
         }
     }
 
@@ -152,8 +158,8 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
         super.onViewRecycled(holder)
         if (!activity.isDestroyed) {
             val itemView = holder.itemView
-            visibleItemPaths.remove(itemView?.photo_name?.tag)
+            visibleItemPaths.remove(itemView.photo_name?.tag)
-            val tmb = itemView?.medium_thumbnail
+            val tmb = itemView.medium_thumbnail
             if (tmb != null) {
                 Glide.with(activity).clear(tmb)
             }
@@ -162,10 +168,10 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
 
     fun isASectionTitle(position: Int) = media.getOrNull(position) is ThumbnailSection
 
-    private fun checkHideBtnVisibility(menu: Menu) {
+    private fun checkHideBtnVisibility(menu: Menu, selectedItems: ArrayList<Medium>) {
         var hiddenCnt = 0
         var unhiddenCnt = 0
-        getSelectedItems().forEach {
+        selectedItems.forEach {
             if (it.isHidden()) {
                 hiddenCnt++
             } else {
@@ -173,15 +179,15 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
             }
         }
 
-        val isInRecycleBin = getSelectedItems().firstOrNull()?.getIsInRecycleBin() == true
+        val isInRecycleBin = selectedItems.firstOrNull()?.getIsInRecycleBin() == true
         menu.findItem(R.id.cab_hide).isVisible = unhiddenCnt > 0 && !isInRecycleBin
         menu.findItem(R.id.cab_unhide).isVisible = hiddenCnt > 0 && !isInRecycleBin
     }
 
-    private fun checkFavoriteBtnVisibility(menu: Menu) {
+    private fun checkFavoriteBtnVisibility(menu: Menu, selectedItems: ArrayList<Medium>) {
         var favoriteCnt = 0
         var nonFavoriteCnt = 0
-        getSelectedItems().forEach {
+        selectedItems.forEach {
             if (it.isFavorite) {
                 favoriteCnt++
             } else {