use Picasso for directory thumbnails too

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

@@ -4,10 +4,12 @@ import android.Manifest
 import android.app.Activity
 import android.content.Intent
 import android.content.pm.PackageManager
+import android.content.res.Configuration
 import android.os.Bundle
 import android.provider.MediaStore
 import android.support.v4.app.ActivityCompat
 import android.support.v7.widget.GridLayoutManager
+import android.util.DisplayMetrics
 import android.view.Menu
 import android.view.MenuItem
 import com.google.gson.Gson
@@ -49,9 +51,14 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
 
     private var mCurrAsyncTask: GetDirectoriesAsynctask? = null
 
+    companion object {
+        var thumbnailSize = 0
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+        updateThumbnailSize()
 
         mIsPickImageIntent = isPickImageIntent(intent)
         mIsPickVideoIntent = isPickVideoIntent(intent)
@@ -115,6 +122,17 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
         config.isFirstRun = false
     }
 
+    override fun onConfigurationChanged(newConfig: Configuration?) {
+        super.onConfigurationChanged(newConfig)
+        updateThumbnailSize()
+    }
+
+    private fun updateThumbnailSize() {
+        val metrics = DisplayMetrics()
+        windowManager.defaultDisplay.getMetrics(metrics)
+        thumbnailSize = metrics.widthPixels / config.dirColumnCnt
+    }
+
     private fun tryloadGallery() {
         if (hasWriteStoragePermission()) {
             if (config.showAll)
@@ -216,11 +234,13 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
     private fun increaseColumnCount() {
         config.dirColumnCnt = ++(directories_grid.layoutManager as GridLayoutManager).spanCount
         invalidateOptionsMenu()
+        updateThumbnailSize()
     }
 
     private fun reduceColumnCount() {
         config.dirColumnCnt = --(directories_grid.layoutManager as GridLayoutManager).spanCount
         invalidateOptionsMenu()
+        updateThumbnailSize()
     }
 
     private fun isPickImageIntent(intent: Intent) = isPickIntent(intent) && (hasImageContentData(intent) || isImageType(intent))

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

@@ -61,7 +61,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
             mIsGetAnyIntent = getBooleanExtra(GET_ANY_INTENT, false)
         }
 
-        updateThumbnailWidth()
+        updateThumbnailSize()
         media_refresh_layout.setOnRefreshListener({ getMedia() })
         mPath = intent.getStringExtra(DIRECTORY)
         mStoredAnimateGifs = config.animateGifs
@@ -99,10 +99,10 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
 
     override fun onConfigurationChanged(newConfig: Configuration?) {
         super.onConfigurationChanged(newConfig)
-        updateThumbnailWidth()
+        updateThumbnailSize()
     }
 
-    private fun updateThumbnailWidth() {
+    private fun updateThumbnailSize() {
         val metrics = DisplayMetrics()
         windowManager.defaultDisplay.getMetrics(metrics)
         thumbnailSize = metrics.widthPixels / config.mediaColumnCnt
@@ -277,13 +277,13 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
     private fun increaseColumnCount() {
         config.mediaColumnCnt = ++(media_grid.layoutManager as GridLayoutManager).spanCount
         invalidateOptionsMenu()
-        updateThumbnailWidth()
+        updateThumbnailSize()
     }
 
     private fun reduceColumnCount() {
         config.mediaColumnCnt = --(media_grid.layoutManager as GridLayoutManager).spanCount
         invalidateOptionsMenu()
-        updateThumbnailWidth()
+        updateThumbnailSize()
     }
 
     override fun deleteFiles(files: ArrayList<File>) {

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

@@ -9,7 +9,6 @@ import com.bignerdranch.android.multiselector.ModalMultiSelectorCallback
 import com.bignerdranch.android.multiselector.MultiSelector
 import com.bignerdranch.android.multiselector.SwappingHolder
 import com.bumptech.glide.Glide
-import com.bumptech.glide.load.DecodeFormat
 import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.simplemobiletools.commons.asynctasks.CopyMoveTask
 import com.simplemobiletools.commons.dialogs.ConfirmationDialog
@@ -17,11 +16,13 @@ import com.simplemobiletools.commons.dialogs.PropertiesDialog
 import com.simplemobiletools.commons.dialogs.RenameItemDialog
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.gallery.R
+import com.simplemobiletools.gallery.activities.MainActivity
 import com.simplemobiletools.gallery.activities.SimpleActivity
 import com.simplemobiletools.gallery.dialogs.CopyDialog
 import com.simplemobiletools.gallery.dialogs.ExcludeFolderDialog
 import com.simplemobiletools.gallery.extensions.*
 import com.simplemobiletools.gallery.models.Directory
+import com.squareup.picasso.Picasso
 import kotlinx.android.synthetic.main.directory_item.view.*
 import kotlinx.android.synthetic.main.directory_tmb.view.*
 import java.io.File
@@ -328,21 +329,32 @@ class DirectoryAdapter(val activity: SimpleActivity, val dirs: MutableList<Direc
                 dir_pin.visibility = if (isPinned) View.VISIBLE else View.GONE
                 toggleItemSelection(this, markedItems.contains(pos), pos)
 
-                val tmb = directory.thumbnail
-                if (tmb.isGif()) {
+                val path = directory.thumbnail
+                if (path.isGif()) {
                     if (animateGifs) {
-                        Glide.with(activity).load(tmb).asGif().diskCacheStrategy(DiskCacheStrategy.SOURCE).placeholder(backgroundColor)
-                                .centerCrop().crossFade().into(dir_thumbnail)
+                        Glide.with(activity)
+                                .load(path)
+                                .asGif()
+                                .diskCacheStrategy(DiskCacheStrategy.SOURCE)
+                                .placeholder(backgroundColor)
+                                .centerCrop()
+                                .crossFade()
+                                .into(dir_thumbnail)
                     } else {
-                        Glide.with(activity).load(tmb).asBitmap().diskCacheStrategy(DiskCacheStrategy.RESULT).placeholder(backgroundColor)
-                                .centerCrop().into(dir_thumbnail)
+                        Glide.with(activity)
+                                .load(path)
+                                .asBitmap()
+                                .diskCacheStrategy(DiskCacheStrategy.SOURCE)
+                                .placeholder(backgroundColor)
+                                .centerCrop()
+                                .into(dir_thumbnail)
                     }
-                } else if (tmb.toLowerCase().endsWith(".png")) {
-                    Glide.with(activity).load(tmb).asBitmap().format(DecodeFormat.PREFER_ARGB_8888).diskCacheStrategy(DiskCacheStrategy.RESULT)
-                            .placeholder(backgroundColor).centerCrop().into(dir_thumbnail)
                 } else {
-                    Glide.with(activity).load(tmb).diskCacheStrategy(DiskCacheStrategy.RESULT).placeholder(backgroundColor)
-                            .centerCrop().crossFade().into(dir_thumbnail)
+                    Picasso.with(activity)
+                            .load("file:$path")
+                            .resize(MainActivity.thumbnailSize, MainActivity.thumbnailSize)
+                            .centerCrop()
+                            .into(dir_thumbnail)
                 }
 
                 setOnClickListener { viewClicked(multiSelector, directory, pos) }