add cab buttons for de/selecting all items

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

@@ -80,6 +80,14 @@ class MediaAdapter(val activity: SimpleActivity, var media: MutableList<Medium>,
                     displayCopyDialog()
                     true
                 }
+                R.id.cab_select_all -> {
+                    selectAll()
+                    true
+                }
+                R.id.cab_deselect_all -> {
+                    deselectAll()
+                    true
+                }
                 R.id.cab_delete -> {
                     askConfirmDelete()
                     true
@@ -165,6 +173,14 @@ class MediaAdapter(val activity: SimpleActivity, var media: MutableList<Medium>,
         })
     }
 
+    fun selectAll() {
+
+    }
+
+    fun deselectAll() {
+
+    }
+
     private fun askConfirmDelete() {
         ConfirmationDialog(activity) {
             actMode?.finish()

app/src/main/res/menu/cab_media.xml

@@ -26,6 +26,15 @@
         android:icon="@mipmap/edit"
         android:title="@string/edit"
         app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/cab_select_all"
+        android:icon="@mipmap/select_all"
+        android:title="@string/select_all"
+        app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/cab_deselect_all"
+        android:title="@string/deselect_all"
+        app:showAsAction="never"/>
     <item
         android:id="@+id/cab_delete"
         android:icon="@mipmap/delete"

app/src/main/res/values-de/strings.xml

@@ -49,6 +49,8 @@
     <string name="show_all">Show all media files</string>
     <string name="all_media">All media</string>
     <string name="folder_view">Switch to folder view</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 Ordner gelöscht</item>

app/src/main/res/values-es/strings.xml

@@ -49,6 +49,8 @@
     <string name="show_all">Show all media files</string>
     <string name="all_media">All media</string>
     <string name="folder_view">Switch to folder view</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 carpeta eliminada</item>

app/src/main/res/values-it/strings.xml

@@ -49,6 +49,8 @@
     <string name="show_all">Show all media files</string>
     <string name="all_media">All media</string>
     <string name="folder_view">Switch to folder view</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 cartella eliminata</item>

app/src/main/res/values-ja/strings.xml

@@ -49,6 +49,8 @@
     <string name="show_all">Show all media files</string>
     <string name="all_media">All media</string>
     <string name="folder_view">Switch to folder view</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 フォルダーを削除しました</item>

app/src/main/res/values-pt-rPT/strings.xml

@@ -49,6 +49,8 @@
     <string name="show_all">Mostrar todos os ficheiros multimédia</string>
     <string name="all_media">Multimédia</string>
     <string name="folder_view">Alternar para a vista de pastas</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 pasta apagada</item>

app/src/main/res/values-ru/strings.xml

@@ -50,6 +50,8 @@
     <string name="show_all">Отобразить все медиафайлы</string>
     <string name="all_media">Все медиафайлы</string>
     <string name="folder_view">Переключиться к виду с папками</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 папка удалена</item>

app/src/main/res/values-sv/strings.xml

@@ -49,6 +49,8 @@
     <string name="show_all">Show all media files</string>
     <string name="all_media">All media</string>
     <string name="folder_view">Switch to folder view</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 mapp borttagen</item>

app/src/main/res/values-zh/strings.xml

@@ -50,6 +50,8 @@
     <string name="show_all">Show all media files</string>
     <string name="all_media">All media</string>
     <string name="folder_view">Switch to folder view</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 folder deleted</item>

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

@@ -49,6 +49,8 @@
     <string name="show_all">Show all media files</string>
     <string name="all_media">All media</string>
     <string name="folder_view">Switch to folder view</string>
+    <string name="select_all">Select all</string>
+    <string name="deselect_all">Deselect all</string>
 
     <plurals name="folders_deleted">
         <item quantity="one">1 folder deleted</item>