add some additional menu items for restoring recycle bin items

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

@@ -200,6 +200,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
 
             findItem(R.id.empty_recycle_bin).isVisible = mPath == RECYCLE_BIN
             findItem(R.id.empty_disable_recycle_bin).isVisible = mPath == RECYCLE_BIN
+            findItem(R.id.restore_all_files).isVisible = mPath == RECYCLE_BIN
 
             findItem(R.id.folder_view).isVisible = mShowAll
             findItem(R.id.open_camera).isVisible = mShowAll
@@ -224,6 +225,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
             R.id.filter -> showFilterMediaDialog()
             R.id.empty_recycle_bin -> emptyRecycleBin()
             R.id.empty_disable_recycle_bin -> emptyAndDisableRecycleBin()
+            R.id.restore_all_files -> restoreAllFiles()
             R.id.toggle_filename -> toggleFilenameVisibility()
             R.id.open_camera -> launchCamera()
             R.id.folder_view -> switchToFolderView()
@@ -424,16 +426,27 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
     }
 
     private fun emptyRecycleBin() {
+        showRecycleBinEmptyingDialog {
             emptyTheRecycleBin {
                 finish()
             }
         }
+    }
 
     private fun emptyAndDisableRecycleBin() {
+        showRecycleBinEmptyingDialog {
             emptyAndDisableTheRecycleBin {
                 finish()
             }
         }
+    }
+
+    private fun restoreAllFiles() {
+        val paths = mMedia.filter { it is Medium }.map { (it as Medium).path } as ArrayList<String>
+        restoreRecycleBinPaths(paths) {
+            finish()
+        }
+    }
 
     private fun toggleFilenameVisibility() {
         config.displayFileNames = !config.displayFileNames

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

@@ -16,6 +16,7 @@ import com.simplemobiletools.gallery.dialogs.ManageExtendedDetailsDialog
 import com.simplemobiletools.gallery.extensions.config
 import com.simplemobiletools.gallery.extensions.emptyTheRecycleBin
 import com.simplemobiletools.gallery.extensions.galleryDB
+import com.simplemobiletools.gallery.extensions.showRecycleBinEmptyingDialog
 import com.simplemobiletools.gallery.helpers.ROTATE_BY_ASPECT_RATIO
 import com.simplemobiletools.gallery.helpers.ROTATE_BY_DEVICE_ROTATION
 import com.simplemobiletools.gallery.helpers.ROTATE_BY_SYSTEM_SETTING
@@ -435,7 +436,7 @@ class SettingsActivity : SimpleActivity() {
             if (mRecycleBinContentSize == 0L) {
                 toast(R.string.recycle_bin_empty)
             } else {
-                ConfirmationDialog(this, "", R.string.empty_recycle_bin_confirmation, R.string.yes, R.string.no) {
+                showRecycleBinEmptyingDialog {
                     emptyTheRecycleBin()
                     mRecycleBinContentSize = 0L
                     settings_empty_recycle_bin_size.text = 0L.formatSize()

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

@@ -214,16 +214,20 @@ class DirectoryAdapter(activity: BaseSimpleActivity, var dirs: ArrayList<Directo
     }
 
     private fun emptyRecycleBin() {
+        activity.showRecycleBinEmptyingDialog {
             activity.emptyTheRecycleBin {
                 listener?.refreshItems()
             }
         }
+    }
 
     private fun emptyAndDisableRecycleBin() {
+        activity.showRecycleBinEmptyingDialog {
             activity.emptyAndDisableTheRecycleBin {
                 listener?.refreshItems()
             }
         }
+    }
 
     private fun updateFolderNames() {
         val includedFolders = activity.config.includedFolders

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

@@ -108,6 +108,7 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
             findItem(R.id.cab_rename).isVisible = isOneItemSelected()
             findItem(R.id.cab_open_with).isVisible = isOneItemSelected()
             findItem(R.id.cab_confirm_selection).isVisible = isAGetIntent && allowMultiplePicks && selectedPositions.size > 0
+            findItem(R.id.cab_restore_recycle_bin_files).isVisible = getSelectedPaths().all { it.startsWith(activity.filesDir.toString()) }
 
             checkHideBtnVisibility(this)
             checkFavoriteBtnVisibility(this)
@@ -128,6 +129,7 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
             R.id.cab_unhide -> toggleFileVisibility(false)
             R.id.cab_add_to_favorites -> toggleFavorites(true)
             R.id.cab_remove_from_favorites -> toggleFavorites(false)
+            R.id.cab_restore_recycle_bin_files -> restoreFiles()
             R.id.cab_share -> shareMedia()
             R.id.cab_copy_to -> copyMoveTo(true)
             R.id.cab_move_to -> copyMoveTo(false)
@@ -244,6 +246,13 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
         }.start()
     }
 
+    private fun restoreFiles() {
+        activity.restoreRecycleBinPaths(getSelectedPaths()) {
+            listener?.refreshItems()
+            finishActMode()
+        }
+    }
+
     private fun shareMedia() {
         if (selectedPositions.size == 1 && selectedPositions.first() != -1) {
             activity.shareMediumPath(getSelectedMedia().first().path)

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/Activity.kt

@@ -6,6 +6,7 @@ import android.provider.MediaStore
 import android.support.v7.app.AppCompatActivity
 import android.view.View
 import com.simplemobiletools.commons.activities.BaseSimpleActivity
+import com.simplemobiletools.commons.dialogs.ConfirmationDialog
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.*
 import com.simplemobiletools.commons.models.FAQItem
@@ -232,7 +233,10 @@ fun BaseSimpleActivity.restoreRecycleBinPaths(paths: ArrayList<String>, callback
                 out?.close()
             }
         }
+
+        runOnUiThread {
             callback()
+        }
     }.start()
 }
 
@@ -254,3 +258,9 @@ fun BaseSimpleActivity.emptyAndDisableTheRecycleBin(callback: () -> Unit) {
         }
     }.start()
 }
+
+fun BaseSimpleActivity.showRecycleBinEmptyingDialog(callback: () -> Unit) {
+    ConfirmationDialog(this, "", R.string.empty_recycle_bin_confirmation, R.string.yes, R.string.no) {
+        callback()
+    }
+}

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

@@ -56,6 +56,10 @@
         android:icon="@drawable/ic_star_on"
         android:title="@string/remove_from_favorites"
         app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/cab_restore_recycle_bin_files"
+        android:title="@string/restore_selected_files"
+        app:showAsAction="never"/>
     <item
         android:id="@+id/cab_open_with"
         android:title="@string/open_with"

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

@@ -30,6 +30,10 @@
         android:id="@+id/empty_disable_recycle_bin"
         android:title="@string/empty_and_disable_recycle_bin"
         app:showAsAction="never"/>
+    <item
+        android:id="@+id/restore_all_files"
+        android:title="@string/restore_all_files"
+        app:showAsAction="never"/>
     <item
         android:id="@+id/folder_view"
         android:title="@string/folder_view"