animate directory removal too

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

@@ -172,8 +172,6 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
     }
 
     private fun notifyDeletion(cnt: Int) {
-        getDirectories()
-
         val res = resources
         val msg = res.getQuantityString(R.plurals.folders_deleted, cnt, cnt)
         mSnackbar = Snackbar.make(coordinator_layout, msg, Snackbar.LENGTH_INDEFINITE)

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

@@ -242,7 +242,17 @@ class DirectoryAdapter(val activity: SimpleActivity, val dirs: MutableList<Direc
     private fun prepareForDeleting() {
         val selections = multiSelector.selectedPositions
         val paths = ArrayList<String>(selections.size)
-        selections.forEach { paths.add(dirs[it].path) }
+        val removeDirs = ArrayList<Directory>(selections.size)
+
+        selections.reverse()
+        selections.forEach {
+            val directory = dirs[it]
+            paths.add(directory.path)
+            removeDirs.add(directory)
+            notifyItemRemoved(it)
+        }
+
+        dirs.removeAll(removeDirs)
         listener?.prepareForDeleting(paths)
     }