diff --git a/app/src/main/res/layout/activity_medium.xml b/app/src/main/res/layout/activity_medium.xml
index 8de070d68..4d88429f9 100644
--- a/app/src/main/res/layout/activity_medium.xml
+++ b/app/src/main/res/layout/activity_medium.xml
@@ -18,6 +18,7 @@
         android:id="@+id/top_shadow"
         android:layout_width="match_parent"
         android:layout_height="@dimen/default_status_action_height"
+        android:contentDescription="@null"
         android:background="@drawable/gradient_background_flipped"/>
 
 </RelativeLayout>
diff --git a/app/src/main/res/layout/activity_panorama_photo.xml b/app/src/main/res/layout/activity_panorama_photo.xml
index 0a4cd3f99..7b589f5d3 100644
--- a/app/src/main/res/layout/activity_panorama_photo.xml
+++ b/app/src/main/res/layout/activity_panorama_photo.xml
@@ -17,7 +17,8 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_alignParentBottom="true"
-        android:background="@drawable/gradient_background"/>
+        android:background="@drawable/gradient_background"
+        android:contentDescription="@null"/>
 
     <ImageView
         android:id="@+id/cardboard"
diff --git a/app/src/main/res/layout/activity_video_player.xml b/app/src/main/res/layout/activity_video_player.xml
index 224c6425a..8c50ca199 100644
--- a/app/src/main/res/layout/activity_video_player.xml
+++ b/app/src/main/res/layout/activity_video_player.xml
@@ -34,7 +34,8 @@
         android:id="@+id/top_shadow"
         android:layout_width="match_parent"
         android:layout_height="@dimen/default_status_action_height"
-        android:background="@drawable/gradient_background_flipped"/>
+        android:background="@drawable/gradient_background_flipped"
+        android:contentDescription="@null"/>
 
     <TextView
         android:id="@+id/video_bottom_gradient"
diff --git a/app/src/main/res/layout/bottom_actions.xml b/app/src/main/res/layout/bottom_actions.xml
index 73fe72dbd..23f9b7dc6 100644
--- a/app/src/main/res/layout/bottom_actions.xml
+++ b/app/src/main/res/layout/bottom_actions.xml
@@ -14,6 +14,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/toggle_favorite"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_star_off"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -28,6 +29,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/edit"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_edit"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -42,6 +44,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/share"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_share"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -56,6 +59,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/delete"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_delete"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -70,6 +74,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/rotate_right"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_rotate_right"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -84,6 +89,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/properties"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_properties"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -98,6 +104,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/change_orientation"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_orientation_auto"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -112,6 +119,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/slideshow"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_slideshow"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -126,6 +134,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/show_on_map"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_place"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -140,6 +149,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/toggle_file_visibility"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_hide"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -154,6 +164,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/rename"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_rename_new"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -168,6 +179,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/set_as"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_set_as"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -182,6 +194,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/copy"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_copy"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -196,6 +209,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/move"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_move"
         app:layout_constraintBottom_toBottomOf="parent"
diff --git a/app/src/main/res/layout/bottom_editor_crop_rotate_actions.xml b/app/src/main/res/layout/bottom_editor_crop_rotate_actions.xml
index 76af37131..e27cf482d 100644
--- a/app/src/main/res/layout/bottom_editor_crop_rotate_actions.xml
+++ b/app/src/main/res/layout/bottom_editor_crop_rotate_actions.xml
@@ -12,6 +12,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/rotate"
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_rotate_right"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -25,6 +26,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/resize"
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_minimize"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -38,6 +40,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/free_aspect_ratio"
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_aspect_ratio"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -51,6 +54,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/flip_horizontally"
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_flip_horizontally"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -64,6 +68,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/flip_vertically"
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_flip_vertically"
         app:layout_constraintBottom_toBottomOf="parent"
diff --git a/app/src/main/res/layout/bottom_editor_draw_actions.xml b/app/src/main/res/layout/bottom_editor_draw_actions.xml
index 8026820e2..faa8c1536 100644
--- a/app/src/main/res/layout/bottom_editor_draw_actions.xml
+++ b/app/src/main/res/layout/bottom_editor_draw_actions.xml
@@ -26,6 +26,7 @@
         android:layout_height="@dimen/bottom_editor_color_picker_size"
         android:layout_marginEnd="@dimen/small_margin"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/change_color"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintRight_toLeftOf="@+id/bottom_draw_undo"
         app:layout_constraintTop_toTopOf="parent"/>
@@ -36,6 +37,7 @@
         android:layout_height="@dimen/bottom_editor_color_picker_size"
         android:layout_marginEnd="@dimen/small_margin"
         android:clickable="false"
+        android:contentDescription="@null"
         android:padding="@dimen/small_margin"
         android:src="@drawable/circle_background"
         app:layout_constraintBottom_toBottomOf="parent"
@@ -49,6 +51,7 @@
         android:layout_marginEnd="@dimen/normal_margin"
         android:background="?attr/selectableItemBackgroundBorderless"
         android:clickable="false"
+        android:contentDescription="@string/undo"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_undo"
         app:layout_constraintBottom_toBottomOf="parent"
diff --git a/app/src/main/res/layout/bottom_editor_primary_actions.xml b/app/src/main/res/layout/bottom_editor_primary_actions.xml
index 20d8035fd..fd7210674 100644
--- a/app/src/main/res/layout/bottom_editor_primary_actions.xml
+++ b/app/src/main/res/layout/bottom_editor_primary_actions.xml
@@ -12,6 +12,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/filter"
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_photo_filter"
         app:layout_constraintBottom_toBottomOf="parent"
diff --git a/app/src/main/res/layout/bottom_set_wallpaper_actions.xml b/app/src/main/res/layout/bottom_set_wallpaper_actions.xml
index 707c72ca7..ddef09436 100644
--- a/app/src/main/res/layout/bottom_set_wallpaper_actions.xml
+++ b/app/src/main/res/layout/bottom_set_wallpaper_actions.xml
@@ -26,6 +26,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:background="?attr/selectableItemBackgroundBorderless"
+        android:contentDescription="@string/rotate"
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_rotate_right"
         app:layout_constraintBottom_toBottomOf="parent"
diff --git a/app/src/main/res/layout/directory_item_grid.xml b/app/src/main/res/layout/directory_item_grid.xml
index 75c2c8ba1..5a24ac9e9 100644
--- a/app/src/main/res/layout/directory_item_grid.xml
+++ b/app/src/main/res/layout/directory_item_grid.xml
@@ -23,6 +23,7 @@
         android:layout_alignBottom="@+id/dir_thumbnail"
         android:layout_centerInParent="true"
         android:background="@color/default_background_color"
+        android:contentDescription="@string/lock_folder"
         android:padding="@dimen/lock_padding"
         android:src="@drawable/ic_lock_huge"
         android:visibility="gone"/>
@@ -36,6 +37,7 @@
         android:layout_alignParentEnd="true"
         android:layout_margin="@dimen/small_margin"
         android:background="@drawable/circle_background"
+        android:contentDescription="@null"
         android:padding="@dimen/tiny_margin"
         android:src="@drawable/ic_check"
         android:visibility="gone"/>
@@ -48,6 +50,7 @@
         android:layout_alignParentTop="true"
         android:layout_margin="@dimen/small_margin"
         android:background="@drawable/circle_black_background"
+        android:contentDescription="@string/pin"
         android:padding="@dimen/small_margin"
         android:src="@drawable/ic_pin"
         android:visibility="gone"/>
@@ -59,7 +62,8 @@
         android:layout_alignStart="@+id/dir_bottom_holder"
         android:layout_alignEnd="@+id/dir_bottom_holder"
         android:layout_alignParentBottom="true"
-        android:background="@drawable/gradient_background"/>
+        android:background="@drawable/gradient_background"
+        android:contentDescription="@null"/>
 
     <LinearLayout
         android:id="@+id/dir_bottom_holder"
@@ -103,6 +107,7 @@
         android:layout_alignEnd="@+id/dir_bottom_holder"
         android:layout_alignParentBottom="true"
         android:alpha="0.8"
+        android:contentDescription="@null"
         android:paddingEnd="@dimen/small_margin"
         android:paddingBottom="@dimen/small_margin"
         android:src="@drawable/ic_sd_card"
diff --git a/app/src/main/res/layout/directory_item_list.xml b/app/src/main/res/layout/directory_item_list.xml
index c4fd676f3..133f24f7a 100644
--- a/app/src/main/res/layout/directory_item_list.xml
+++ b/app/src/main/res/layout/directory_item_list.xml
@@ -24,6 +24,7 @@
         android:layout_alignBottom="@+id/dir_thumbnail"
         android:layout_centerInParent="true"
         android:background="@color/default_background_color"
+        android:contentDescription="@string/lock_folder"
         android:padding="@dimen/medium_margin"
         android:src="@drawable/ic_lock_huge"
         android:visibility="gone"/>
@@ -36,6 +37,7 @@
         android:layout_alignParentEnd="true"
         android:layout_margin="@dimen/small_margin"
         android:background="@drawable/circle_background"
+        android:contentDescription="@null"
         android:padding="@dimen/tiny_margin"
         android:src="@drawable/ic_check"
         android:visibility="gone"/>
@@ -91,6 +93,7 @@
             android:id="@+id/dir_location"
             android:layout_width="@dimen/sd_card_icon_size"
             android:layout_height="@dimen/sd_card_icon_size"
+            android:contentDescription="@null"
             android:paddingBottom="@dimen/small_margin"
             android:src="@drawable/ic_sd_card"
             android:visibility="gone"/>
@@ -99,6 +102,7 @@
             android:id="@+id/dir_pin"
             android:layout_width="@dimen/sd_card_icon_size"
             android:layout_height="@dimen/sd_card_icon_size"
+            android:contentDescription="@string/pin"
             android:paddingBottom="@dimen/small_margin"
             android:src="@drawable/ic_pin"
             android:visibility="gone"/>
diff --git a/app/src/main/res/layout/editor_filter_item.xml b/app/src/main/res/layout/editor_filter_item.xml
index 31f6bb51d..dd3913336 100644
--- a/app/src/main/res/layout/editor_filter_item.xml
+++ b/app/src/main/res/layout/editor_filter_item.xml
@@ -12,6 +12,7 @@
         android:layout_height="@dimen/bottom_filters_thumbnail_size"
         android:layout_above="@+id/editor_filter_item_label"
         android:background="@drawable/stroke_background"
+        android:contentDescription="@null"
         android:padding="1dp"/>
 
     <TextView
diff --git a/app/src/main/res/layout/fragment_holder.xml b/app/src/main/res/layout/fragment_holder.xml
index 77f5953e7..ab722a90a 100644
--- a/app/src/main/res/layout/fragment_holder.xml
+++ b/app/src/main/res/layout/fragment_holder.xml
@@ -13,6 +13,7 @@
     <ImageView
         android:id="@+id/top_shadow"
         android:layout_width="match_parent"
+        android:contentDescription="@null"
         android:layout_height="@dimen/default_status_action_height"
         android:background="@drawable/gradient_background_flipped"/>
 
diff --git a/app/src/main/res/layout/pager_photo_item.xml b/app/src/main/res/layout/pager_photo_item.xml
index 2336176cb..0ed59f42b 100644
--- a/app/src/main/res/layout/pager_photo_item.xml
+++ b/app/src/main/res/layout/pager_photo_item.xml
@@ -38,6 +38,7 @@
         android:layout_height="@dimen/play_outline_size_big"
         android:layout_centerInParent="true"
         android:padding="20dp"
+        android:contentDescription="@null"
         android:src="@drawable/ic_panorama_outline"
         android:visibility="gone"/>
 
diff --git a/app/src/main/res/layout/photo_video_item_grid.xml b/app/src/main/res/layout/photo_video_item_grid.xml
index abeeb8618..b873ffe5e 100644
--- a/app/src/main/res/layout/photo_video_item_grid.xml
+++ b/app/src/main/res/layout/photo_video_item_grid.xml
@@ -51,6 +51,7 @@
         android:layout_alignParentEnd="true"
         android:layout_margin="@dimen/small_margin"
         android:background="@drawable/circle_background"
+        android:contentDescription="@null"
         android:padding="@dimen/tiny_margin"
         android:src="@drawable/ic_check"
         android:visibility="gone"/>
diff --git a/app/src/main/res/layout/photo_video_item_list.xml b/app/src/main/res/layout/photo_video_item_list.xml
index 3acf413c3..24ae7dd88 100644
--- a/app/src/main/res/layout/photo_video_item_list.xml
+++ b/app/src/main/res/layout/photo_video_item_list.xml
@@ -21,6 +21,7 @@
         android:layout_height="@dimen/selection_check_size"
         android:layout_alignParentTop="true"
         android:layout_alignParentEnd="true"
+        android:contentDescription="@null"
         android:layout_margin="@dimen/small_margin"
         android:background="@drawable/circle_background"
         android:padding="@dimen/tiny_margin"