update deleted files from media screen manually

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

@@ -199,6 +199,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
     }
 
     override fun deleteFiles(files: ArrayList<File>) {
+        var deletedCnt = 0
         files.filter { it.exists() && it.isImageVideoGif() }
                 .forEach {
                     if (needsStupidWritePermissions(it.absolutePath)) {
@@ -214,17 +215,25 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
                     } else {
                         it.delete()
                     }
+
+                    if (deleteFromMediaStore(it))
+                        deletedCnt++
                 }
 
-        scanFiles(files) {
+        if (deletedCnt == files.size) {
-            if (mMedia.isEmpty()) {
-                finish()
-            }
             updateMediaView()
+        } else {
+            scanFiles(files) {
+                updateMediaView()
+            }
         }
     }
 
     private fun updateMediaView() {
+        if (mMedia.isEmpty()) {
+            finish()
+        }
+
         if (!isDirEmpty()) {
             getMedia()
         }

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

@@ -2,6 +2,7 @@ package com.simplemobiletools.gallery.activities
 
 import android.annotation.TargetApi
 import android.app.Activity
+import android.content.ContentValues
 import android.content.Intent
 import android.os.Build
 import android.os.Bundle
@@ -9,6 +10,7 @@ import android.provider.MediaStore
 import android.support.v7.app.AppCompatActivity
 import android.view.MenuItem
 import android.view.View
+import com.simplemobiletools.filepicker.extensions.isImageSlow
 import com.simplemobiletools.filepicker.extensions.isShowingWritePermissions
 import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.helpers.Config
@@ -68,6 +70,13 @@ open class SimpleActivity : AppCompatActivity() {
 
     fun isShowingPermDialog(file: File) = isShowingWritePermissions(file, mConfig.treeUri, OPEN_DOCUMENT_TREE)
 
+    fun deleteFromMediaStore(file: File): Boolean {
+        val values = ContentValues()
+        values.put(MediaStore.MediaColumns.DATA, file.absolutePath)
+        val uri = if (file.isImageSlow()) MediaStore.Images.Media.EXTERNAL_CONTENT_URI else MediaStore.Video.Media.EXTERNAL_CONTENT_URI
+        return contentResolver.delete(uri, "${MediaStore.MediaColumns.DATA} = '${file.absolutePath}'", null) == 1
+    }
+
     fun showSystemUI() {
         supportActionBar?.show()
         window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_STABLE or

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

@@ -1,7 +1,6 @@
 package com.simplemobiletools.gallery.activities
 
 import android.app.Activity
-import android.content.ContentValues
 import android.content.Intent
 import android.content.res.Configuration
 import android.database.Cursor
@@ -213,12 +212,9 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             file.delete()
         }
 
-        val values = ContentValues()
+        val deleted = deleteFromMediaStore(file)
-        values.put(MediaStore.MediaColumns.DATA, file.absolutePath)
-        val uri = if (file.isImageSlow()) MediaStore.Images.Media.EXTERNAL_CONTENT_URI else MediaStore.Video.Media.EXTERNAL_CONTENT_URI
-        val updated = contentResolver.delete(uri, "${MediaStore.MediaColumns.DATA} = '${file.absolutePath}'", null) == 1
 
-        if (updated) {
+        if (deleted) {
             reloadViewPager()
         } else {
             scanFile(file) {