store the amount of columns

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

@@ -62,7 +62,6 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
         mToBeDeleted = ArrayList<String>()
         directories_holder.setOnRefreshListener({ getDirectories() })
         mDirs = ArrayList<Directory>()
-        handleZooming()
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
@@ -120,6 +119,7 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
                 showAllMedia()
             else
                 getDirectories()
+            handleZooming()
         } else {
             ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), STORAGE_PERMISSION)
         }
@@ -234,17 +234,18 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
 
     private fun handleZooming() {
         val layoutManager = directories_grid.layoutManager as GridLayoutManager
+        layoutManager.spanCount = mConfig.dirColumnCnt
         MyScalableRecyclerView.mListener = object : MyScalableRecyclerView.ZoomListener {
             override fun zoomIn() {
                 if (layoutManager.spanCount > 1) {
-                    layoutManager.spanCount--
+                    mConfig.dirColumnCnt = --layoutManager.spanCount
                     DirectoryAdapter.actMode?.finish()
                 }
             }
 
             override fun zoomOut() {
                 if (layoutManager.spanCount < 10) {
-                    layoutManager.spanCount++
+                    mConfig.dirColumnCnt = ++layoutManager.spanCount
                     DirectoryAdapter.actMode?.finish()
                 }
             }

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

@@ -50,7 +50,6 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
             mIsGetAnyIntent = getBooleanExtra(GET_ANY_INTENT, false)
         }
 
-        handleZooming()
         media_holder.setOnRefreshListener({ getMedia() })
         mPath = intent.getStringExtra(DIRECTORY)
         mMedia = ArrayList<Medium>()
@@ -69,6 +68,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
             val dirName = getHumanizedFilename(mPath)
             title = if (mShowAll) resources.getString(R.string.all_folders) else dirName
             getMedia()
+            handleZooming()
         } else {
             finish()
         }
@@ -203,17 +203,18 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
 
     private fun handleZooming() {
         val layoutManager = media_grid.layoutManager as GridLayoutManager
+        layoutManager.spanCount = mConfig.mediaColumnCnt
         MyScalableRecyclerView.mListener = object : MyScalableRecyclerView.ZoomListener {
             override fun zoomIn() {
                 if (layoutManager.spanCount > 1) {
-                    layoutManager.spanCount--
+                    mConfig.mediaColumnCnt = --layoutManager.spanCount
                     MediaAdapter.actMode?.finish()
                 }
             }
 
             override fun zoomOut() {
                 if (layoutManager.spanCount < 10) {
-                    layoutManager.spanCount++
+                    mConfig.mediaColumnCnt = ++layoutManager.spanCount
                     MediaAdapter.actMode?.finish()
                 }
             }

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

@@ -2,9 +2,10 @@ package com.simplemobiletools.gallery.helpers
 
 import android.content.Context
 import android.content.SharedPreferences
+import com.simplemobiletools.gallery.R
 import java.util.*
 
-class Config private constructor(context: Context) {
+class Config private constructor(val context: Context) {
     private val mPrefs: SharedPreferences
 
     companion object {
@@ -100,4 +101,12 @@ class Config private constructor(context: Context) {
     var showMedia: Int
         get() = mPrefs.getInt(SHOW_MEDIA, IMAGES_AND_VIDEOS)
         set(showMedia) = mPrefs.edit().putInt(SHOW_MEDIA, showMedia).apply()
+
+    var dirColumnCnt: Int
+        get() = mPrefs.getInt(DIR_COLUMN_CNT, context.resources.getInteger(R.integer.directory_columns))
+        set(dirColumnCnt) = mPrefs.edit().putInt(DIR_COLUMN_CNT, dirColumnCnt).apply()
+
+    var mediaColumnCnt: Int
+        get() = mPrefs.getInt(MEDIA_COLUMN_CNT, context.resources.getInteger(R.integer.media_columns))
+        set(mediaColumnCnt) = mPrefs.edit().putInt(MEDIA_COLUMN_CNT, mediaColumnCnt).apply()
 }

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

@@ -13,6 +13,8 @@ val AUTOPLAY_VIDEOS = "autoplay_videos"
 val TREE_URI = "tree_uri"
 val DISPLAY_FILE_NAMES = "display_file_names"
 val PINNED_FOLDERS = "pinned_folders"
+val DIR_COLUMN_CNT = "dir_column_cnt"
+val MEDIA_COLUMN_CNT = "media_column_cnt"
 val SHOW_ALL = "show_all"   // display images and videos from all folders together
 val SHOW_MEDIA = "show_media"
 

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

@@ -12,6 +12,6 @@
         android:layout_height="match_parent"
         android:scrollbars="vertical"
         app:layoutManager="android.support.v7.widget.GridLayoutManager"
-        app:spanCount="@integer/photo_columns"/>
+        app:spanCount="@integer/media_columns"/>
 
 </android.support.v4.widget.SwipeRefreshLayout>

app/src/main/res/values-w480dp/integers.xml

@@ -1,4 +1,4 @@
 <resources>
     <integer name="directory_columns">3</integer>
-    <integer name="photo_columns">5</integer>
+    <integer name="media_columns">5</integer>
 </resources>

app/src/main/res/values-w600dp/integers.xml

@@ -1,4 +1,4 @@
 <resources>
     <integer name="directory_columns">4</integer>
-    <integer name="photo_columns">7</integer>
+    <integer name="media_columns">7</integer>
 </resources>

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

@@ -1,4 +1,4 @@
 <resources>
     <integer name="directory_columns">2</integer>
-    <integer name="photo_columns">3</integer>
+    <integer name="media_columns">3</integer>
 </resources>