store Show All in shared prefs making it permanent

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

@@ -114,6 +114,9 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
 
     private fun tryloadGallery() {
         if (hasStoragePermission()) {
+            if (mConfig.showAll)
+                showAllMedia()
+            else
                 getDirectories()
         } else {
             ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), STORAGE_PERMISSION)
@@ -150,11 +153,12 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
     }
 
     private fun showAllMedia() {
+        mConfig.showAll = true
         Intent(this, MediaActivity::class.java).apply {
             putExtra(DIRECTORY, "/")
-            putExtra(SHOW_ALL, true)
             startActivity(this)
         }
+        finish()
     }
 
     override fun prepareForDeleting(paths: ArrayList<String>) {

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

@@ -57,7 +57,9 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
         media_holder.setOnRefreshListener({ getMedia() })
         mPath = intent.getStringExtra(DIRECTORY)
         mMedia = ArrayList<Medium>()
-        mShowAll = intent.getBooleanExtra(SHOW_ALL, false)
+        mShowAll = mConfig.showAll
+        if (mShowAll)
+            supportActionBar?.setDisplayHomeAsUpEnabled(false)
     }
 
     override fun onResume() {
@@ -103,6 +105,9 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
         val isFolderHidden = mConfig.getIsFolderHidden(mPath)
         menu.findItem(R.id.hide_folder).isVisible = !isFolderHidden && !mShowAll
         menu.findItem(R.id.unhide_folder).isVisible = isFolderHidden && !mShowAll
+
+        menu.findItem(R.id.folder_view).isVisible = mShowAll
+
         return true
     }
 
@@ -116,6 +121,10 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
                 toggleFilenameVisibility()
                 true
             }
+            R.id.folder_view -> {
+                switchToFolderView()
+                true
+            }
             R.id.hide_folder -> {
                 hideFolder()
                 true
@@ -140,6 +149,12 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
         }
     }
 
+    private fun switchToFolderView() {
+        mConfig.showAll = false
+        startActivity(Intent(this, MainActivity::class.java))
+        finish()
+    }
+
     private fun hideFolder() {
         mConfig.addHiddenFolder(mPath)
 

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

@@ -27,7 +27,6 @@ import com.simplemobiletools.gallery.fragments.ViewPagerFragment
 import com.simplemobiletools.gallery.helpers.MEDIUM
 import com.simplemobiletools.gallery.helpers.REQUEST_EDIT_IMAGE
 import com.simplemobiletools.gallery.helpers.REQUEST_SET_WALLPAPER
-import com.simplemobiletools.gallery.helpers.SHOW_ALL
 import com.simplemobiletools.gallery.models.Medium
 import kotlinx.android.synthetic.main.activity_medium.*
 import java.io.File
@@ -67,7 +66,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             }
         } else {
             mPath = intent.getStringExtra(MEDIUM)
-            mShowAll = intent.getBooleanExtra(SHOW_ALL, false)
+            mShowAll = mConfig.showAll
         }
 
         if (mPath.isEmpty()) {

app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Config.kt

@@ -43,6 +43,10 @@ class Config private constructor(context: Context) {
         get() = mPrefs.getStringSet(PINNED_FOLDERS, HashSet<String>())
         set(pinnedFolders) = mPrefs.edit().putStringSet(PINNED_FOLDERS, pinnedFolders).apply()
 
+    var showAll: Boolean
+        get() = mPrefs.getBoolean(SHOW_ALL, false)
+        set(showAll) = mPrefs.edit().putBoolean(SHOW_ALL, showAll).apply()
+
     fun addPinnedFolders(paths: Set<String>) {
         val currPinnedFolders = HashSet<String>(pinnedFolders)
         currPinnedFolders.addAll(paths)

app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Constants.kt

@@ -13,6 +13,7 @@ val AUTOPLAY_VIDEOS = "autoplay_videos"
 val TREE_URI = "tree_uri"
 val DISPLAY_FILE_NAMES = "display_file_names"
 val PINNED_FOLDERS = "pinned_folders"
+val SHOW_ALL = "show_all"
 
 // sorting
 val SORT_BY_NAME = 1
@@ -26,7 +27,6 @@ val SORT_DESCENDING = 1024
 val OPEN_DOCUMENT_TREE = 1000
 
 val DIRECTORY = "directory"
-val SHOW_ALL = "show_all"
 val MEDIUM = "medium"
 val GET_IMAGE_INTENT = "get_image_intent"
 val GET_VIDEO_INTENT = "get_video_intent"

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

@@ -11,6 +11,10 @@
         android:icon="@mipmap/toggle_filename"
         android:title="@string/toggle_filename"
         app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/folder_view"
+        android:title="@string/folder_view"
+        app:showAsAction="never"/>
     <item
         android:id="@+id/hide_folder"
         android:title="@string/hide_folder"