fix back button

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

@@ -705,6 +705,8 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener, Camera
         ) {
             val transitionSet = createTransition(isClosing = true)
             TransitionManager.go(defaultScene, transitionSet)
+            media_size_toggle_group.beGone()
+            flash_toggle_group.beGone()
             return true
         }
 
@@ -762,6 +764,7 @@ class MainActivity : SimpleActivity(), PhotoProcessor.MediaSavedListener, Camera
     private fun showResolutionOptions() {
         val transitionSet = createTransition()
         TransitionManager.go(mediaSizeScene, transitionSet)
+        media_size_toggle_group.beVisible()
         media_size_toggle_group.children.map { it as MaterialButton }.forEach(::setButtonColors)
     }
 

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

@@ -1,11 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <com.google.android.material.button.MaterialButtonToggleGroup xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/flash_toggle_group"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:visibility="gone"
     app:selectionRequired="true"
-    app:singleSelection="true">
+    app:singleSelection="true"
+    tools:visibility="visible">
 
 
     <Button

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

@@ -1,8 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <com.google.android.material.button.MaterialButtonToggleGroup xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/media_size_toggle_group"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     app:selectionRequired="true"
+    android:visibility="gone"
+    tools:visibility="visible"
     app:singleSelection="true" />