do not show locked folders thumbnails, just a placeholder

app/build.gradle

@@ -61,7 +61,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:5.14.7'
+    implementation 'com.simplemobiletools:commons:5.14.8'
     implementation 'com.theartofdev.edmodo:android-image-cropper:2.8.0'
     implementation 'androidx.multidex:multidex:2.0.1'
     implementation 'it.sephiroth.android.exif:library:1.0.1'

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

@@ -30,7 +30,14 @@ import com.simplemobiletools.gallery.pro.helpers.*
 import com.simplemobiletools.gallery.pro.interfaces.DirectoryOperationsListener
 import com.simplemobiletools.gallery.pro.models.AlbumCover
 import com.simplemobiletools.gallery.pro.models.Directory
+import kotlinx.android.synthetic.main.directory_item_grid.view.*
 import kotlinx.android.synthetic.main.directory_item_list.view.*
+import kotlinx.android.synthetic.main.directory_item_list.view.dir_check
+import kotlinx.android.synthetic.main.directory_item_list.view.dir_location
+import kotlinx.android.synthetic.main.directory_item_list.view.dir_name
+import kotlinx.android.synthetic.main.directory_item_list.view.dir_pin
+import kotlinx.android.synthetic.main.directory_item_list.view.dir_thumbnail
+import kotlinx.android.synthetic.main.directory_item_list.view.photo_cnt
 import java.io.File
 
 class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directory>, val listener: DirectoryOperationsListener?, recyclerView: MyRecyclerView,
@@ -46,9 +53,11 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
     private var cropThumbnails = config.cropThumbnails
     private var groupDirectSubfolders = config.groupDirectSubfolders
     private var currentDirectoriesHash = dirs.hashCode()
+    private var lockedFolderPaths = ArrayList<String>()
 
     init {
         setupDragListener(true)
+        fillLockedFolders()
     }
 
     override fun getActionMenuId() = R.menu.cab_directories
@@ -328,6 +337,7 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
             if (success) {
                 getSelectedPaths().filter { !config.isFolderProtected(it) }.forEach {
                     config.addFolderProtection(it, hash, type)
+                    lockedFolderPaths.add(it)
                 }
 
                 listener?.refreshItems()
@@ -345,6 +355,7 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
             if (success) {
                 paths.filter { config.isFolderProtected(it) && config.getFolderProtectionType(it) == tabToShow && config.getFolderProtectionHash(it) == hashToCheck }.forEach {
                     config.removeFolderProtection(it)
+                    lockedFolderPaths.remove(it)
                 }
 
                 listener?.refreshItems()
@@ -538,11 +549,19 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
 
     private fun getItemWithKey(key: Int): Directory? = dirs.firstOrNull { it.path.hashCode() == key }
 
+    private fun fillLockedFolders() {
+        lockedFolderPaths.clear()
+        dirs.map { it.path }.filter { config.isFolderProtected(it) }.forEach {
+            lockedFolderPaths.add(it)
+        }
+    }
+
     fun updateDirs(newDirs: ArrayList<Directory>) {
         val directories = newDirs.clone() as ArrayList<Directory>
         if (directories.hashCode() != currentDirectoriesHash) {
             currentDirectoriesHash = directories.hashCode()
             dirs = directories
+            fillLockedFolders()
             notifyDataSetChanged()
             finishActMode()
         }
@@ -582,7 +601,13 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
                 dir_check.background?.applyColorFilter(primaryColor)
             }
 
-            activity.loadImage(thumbnailType, directory.tmb, dir_thumbnail, scrollHorizontally, animateGifs, cropThumbnails)
+            if (lockedFolderPaths.contains(directory.path)) {
+                dir_lock.beVisible()
+            } else {
+                dir_lock.beGone()
+                activity.loadImage(thumbnailType, directory.tmb, dir_thumbnail, scrollHorizontally, animateGifs, cropThumbnails)
+            }
+
             dir_pin.beVisibleIf(pinnedFolders.contains(directory.path))
             dir_location.beVisibleIf(directory.location != LOCATION_INTERNAL)
             if (dir_location.isVisible()) {

app/src/main/res/layout/directory_item_grid.xml

@@ -13,6 +13,20 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"/>
 
+    <ImageView
+        android:id="@+id/dir_lock"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_alignStart="@+id/dir_thumbnail"
+        android:layout_alignTop="@+id/dir_thumbnail"
+        android:layout_alignEnd="@+id/dir_thumbnail"
+        android:layout_alignBottom="@+id/dir_thumbnail"
+        android:layout_centerInParent="true"
+        android:background="@color/default_background_color"
+        android:padding="@dimen/lock_padding"
+        android:src="@drawable/ic_lock_huge"
+        android:visibility="gone"/>
+
     <ImageView
         android:id="@+id/dir_check"
         android:layout_width="@dimen/selection_check_size"

app/src/main/res/values-sw600dp/dimens.xml

@@ -6,4 +6,5 @@
     <dimen name="selection_check_size">38dp</dimen>
     <dimen name="tmb_shadow_height">70dp</dimen>
     <dimen name="instant_change_bar_width">100dp</dimen>
+    <dimen name="lock_padding">80dp</dimen>
 </resources>

app/src/main/res/values/dimens.xml

@@ -22,4 +22,5 @@
     <dimen name="default_status_action_height">86dp</dimen>
     <dimen name="widget_initial_size">110dp</dimen>
     <dimen name="full_brush_size">40dp</dimen>
+    <dimen name="lock_padding">40dp</dimen>
 </resources>