do not ask for authentication on every screen, at locked folders

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

@@ -835,6 +835,7 @@ class MainActivity : SimpleActivity(), DirectoryOperationsListener {
         handleLockedFolderOpening(path) { success ->
             if (success) {
                 Intent(this, MediaActivity::class.java).apply {
+                    putExtra(SKIP_AUTHENTICATION, true)
                     putExtra(DIRECTORY, path)
                     handleMediaIntent(this)
                 }

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

@@ -160,6 +160,9 @@ class MediaActivity : SimpleActivity(), MediaOperationsListener {
         media_empty_text_placeholder_2.setTextColor(getAdjustedPrimaryColor())
 
         if (mMedia.isEmpty() || config.getFolderSorting(mPath) and SORT_BY_RANDOM == 0) {
+            if (shouldSkipAuthentication()) {
+                tryLoadGallery()
+            } else {
                 handleLockedFolderOpening(mPath) { success ->
                     if (success) {
                         tryLoadGallery()
@@ -169,6 +172,7 @@ class MediaActivity : SimpleActivity(), MediaOperationsListener {
                 }
             }
         }
+    }
 
     override fun onPause() {
         super.onPause()
@@ -274,8 +278,8 @@ class MediaActivity : SimpleActivity(), MediaOperationsListener {
     private fun startSlideshow() {
         if (mMedia.isNotEmpty()) {
             Intent(this, ViewPagerActivity::class.java).apply {
-                val item = mMedia.firstOrNull { it is Medium } as? Medium
-                        ?: return
+                val item = mMedia.firstOrNull { it is Medium } as? Medium ?: return
+                putExtra(SKIP_AUTHENTICATION, shouldSkipAuthentication())
                 putExtra(PATH, item.path)
                 putExtra(SHOW_ALL, mShowAll)
                 putExtra(SLIDESHOW_START_ON_ENTER, true)
@@ -865,6 +869,7 @@ class MediaActivity : SimpleActivity(), MediaOperationsListener {
                 openPath(path, false, extras)
             } else {
                 Intent(this, ViewPagerActivity::class.java).apply {
+                    putExtra(SKIP_AUTHENTICATION, shouldSkipAuthentication())
                     putExtra(PATH, path)
                     putExtra(SHOW_ALL, mShowAll)
                     putExtra(SHOW_FAVORITES, mPath == FAVORITES)
@@ -932,6 +937,8 @@ class MediaActivity : SimpleActivity(), MediaOperationsListener {
         }
     }
 
+    private fun shouldSkipAuthentication() = intent.getBooleanExtra(SKIP_AUTHENTICATION, false)
+
     private fun deleteFilteredFiles(filtered: ArrayList<FileDirItem>) {
         deleteFiles(filtered) {
             if (!it) {

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

@@ -308,6 +308,9 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
 
         showSystemUI(true)
 
+        if (intent.getBooleanExtra(SKIP_AUTHENTICATION, false)) {
+            initContinue()
+        } else {
             handleLockedFolderOpening(mPath.getParentPath()) { success ->
                 if (success) {
                     initContinue()
@@ -316,6 +319,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
                 }
             }
         }
+    }
 
     private fun initContinue() {
         if (intent.extras?.containsKey(IS_VIEW_INTENT) == true) {

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

@@ -132,6 +132,7 @@ const val IS_VIEW_INTENT = "is_view_intent"
 const val PICKED_PATHS = "picked_paths"
 const val SHOULD_INIT_FRAGMENT = "should_init_fragment"
 const val PORTRAIT_PATH = "portrait_path"
+const val SKIP_AUTHENTICATION = "skip_authentication"
 
 // rotations
 const val ROTATE_BY_SYSTEM_SETTING = 0