]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/BookmarksActivity.java
Combine drawable files. https://redmine.stoutner.com/issues/794
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / BookmarksActivity.java
index 3a96929f897263bf1590279083faf4314a5b409a..cea440a4239b0eb78f9bbf60c2ea856240e49a5c 100644 (file)
@@ -1,31 +1,29 @@
 /*
- * Copyright © 2016-2020 Soren Stoutner <soren@stoutner.com>.
+ * Copyright © 2016-2022 Soren Stoutner <soren@stoutner.com>.
  *
- * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
+ * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
  *
- * Privacy Browser is free software: you can redistribute it and/or modify
+ * Privacy Browser Android is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
- * Privacy Browser is distributed in the hope that it will be useful,
+ * Privacy Browser Android is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
+ * along with Privacy Browser Android.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 package com.stoutner.privacybrowser.activities;
 
 import android.annotation.SuppressLint;
-import android.app.Activity;
 import android.app.Dialog;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.Configuration;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -40,6 +38,7 @@ import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.Window;
 import android.view.WindowManager;
 import android.widget.AbsListView;
 import android.widget.CursorAdapter;
@@ -52,8 +51,7 @@ import android.widget.TextView;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;  // The AndroidX toolbar must be used until the minimum API is >= 21.
-import androidx.core.app.NavUtils;
+import androidx.appcompat.widget.Toolbar;
 import androidx.fragment.app.DialogFragment;
 
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
@@ -68,23 +66,25 @@ import com.stoutner.privacybrowser.R;
 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
 
 import java.io.ByteArrayOutputStream;
+import java.util.ArrayList;
 
 public class BookmarksActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener, EditBookmarkDialog.EditBookmarkListener,
         EditBookmarkFolderDialog.EditBookmarkFolderListener, MoveToFolderDialog.MoveToFolderListener {
 
-    // `currentFolder` is public static so it can be accessed from `MoveToFolderDialog` and `BookmarksDatabaseViewActivity`.
-    // It is used in `onCreate`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`,
-    // and `loadFolder()`.
+    // `currentFolder` is public static so it can be accessed from `BookmarksDatabaseViewActivity`.
     public static String currentFolder;
 
-    // `checkedItemIds` is public static so it can be accessed from `MoveToFolderDialog`.  It is also used in `onCreate()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`,
-    // and `updateMoveIcons()`.
-    public static long[] checkedItemIds;
-
     // `restartFromBookmarksDatabaseViewActivity` is public static so it can be accessed from `BookmarksDatabaseViewActivity`.  It is also used in `onRestart()`.
     public static boolean restartFromBookmarksDatabaseViewActivity;
 
 
+    // Define the saved instance state constants.
+    private final String CHECKED_BOOKMARKS_ARRAY_LIST = "checked_bookmarks_array_list";
+
+    // Define the class menu items.
+    private MenuItem moveBookmarkUpMenuItem;
+    private MenuItem moveBookmarkDownMenuItem;
+
     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`,
     // `onMoveToFolder()`, `deleteBookmarkFolderContents()`, `loadFolder()`, and `onDestroy()`.
     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
@@ -109,12 +109,6 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
     // `oldFolderName` is used in `onCreate()` and `onSaveBookmarkFolder()`.
     private String oldFolderNameString;
 
-    // `moveBookmarkUpMenuItem` is used in `onCreate()` and `updateMoveIcons()`.
-    private MenuItem moveBookmarkUpMenuItem;
-
-    // `moveBookmarkDownMenuItem` is used in `onCreate()` and `updateMoveIcons()`.
-    private MenuItem moveBookmarkDownMenuItem;
-
     // `bookmarksDeletedSnackbar` is used in `onCreate()`, `onOptionsItemSelected()`, and `onBackPressed()`.
     private Snackbar bookmarksDeletedSnackbar;
 
@@ -129,8 +123,9 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Get the screenshot preference.
-        boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
+        // Get the preferences.
+        boolean allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false);
+        boolean bottomAppBar = sharedPreferences.getBoolean(getString(R.string.bottom_app_bar_key), false);
 
         // Disable screenshots if not allowed.
         if (!allowScreenshots) {
@@ -166,15 +161,25 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         // Convert the favorite icon byte array to a bitmap.
         Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 
-        // Set the content view.
-        setContentView(R.layout.bookmarks_coordinatorlayout);
+        // Set the content according to the app bar position.
+        if (bottomAppBar) {
+            // Set the content view.
+            setContentView(R.layout.bookmarks_bottom_appbar);
+        } else {
+            // `Window.FEATURE_ACTION_MODE_OVERLAY` makes the contextual action mode cover the support action bar.  It must be requested before the content is set.
+            supportRequestWindowFeature(Window.FEATURE_ACTION_MODE_OVERLAY);
+
+            // Set the content view.
+            setContentView(R.layout.bookmarks_top_appbar);
+        }
 
-        // The AndroidX toolbar must be used until the minimum API is >= 21.
+        // Get a handle for the toolbar.
         final Toolbar toolbar = findViewById(R.id.bookmarks_toolbar);
+
+        // Set the support action bar.
         setSupportActionBar(toolbar);
 
-        // Get a handle for the activity, the app bar, and the ListView.
-        final Activity bookmarksActivity = this;
+        // Get handles for the views.
         appBar = getSupportActionBar();
         bookmarksListView = findViewById(R.id.bookmarks_listview);
 
@@ -194,37 +199,30 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         // Set a listener so that tapping a list item loads the URL or folder.
         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
             // Convert the id from long to int to match the format of the bookmarks database.
-            int databaseID = (int) id;
+            int databaseId = (int) id;
 
-            // Get the bookmark cursor for this ID and move it to the first row.
-            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
+            // Get the bookmark cursor for this ID.
+            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseId);
+
+            // Move the cursor to the first entry.
             bookmarkCursor.moveToFirst();
 
             // Act upon the bookmark according to the type.
-            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
+            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
                 // Update the current folder.
-                currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
                 // Load the new folder.
                 loadFolder();
             } else {  // The selected bookmark is not a folder.
-                // Get the bookmark URL and assign it to `formattedUrlString`.
-                MainWebViewActivity.urlToLoadOnRestart = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL));
-
-                // Set `MainWebViewActivity` to load the new URL on restart.
-                MainWebViewActivity.loadUrlOnRestart = true;
-
-                // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
-                MainWebViewActivity.currentBookmarksFolder = currentFolder;
-
-                // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
-                MainWebViewActivity.restartFromBookmarksActivity = true;
+                // Instantiate the edit bookmark dialog.
+                DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, favoriteIconBitmap);
 
-                // Return to `MainWebViewActivity`.
-                NavUtils.navigateUpFromSameTask(bookmarksActivity);
+                // Make it so.
+                editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
             }
 
-            // Close the `Cursor`.
+            // Close the cursor.
             bookmarkCursor.close();
         });
 
@@ -285,267 +283,301 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
                 // Get the number of selected bookmarks.
                 int numberOfSelectedBookmarks = bookmarksListView.getCheckedItemCount();
 
-                // Adjust the ActionMode and the menu according to the number of selected bookmarks.
-                if (numberOfSelectedBookmarks == 1) {  // One bookmark is selected.
-                    // List the number of selected bookmarks in the subtitle.
-                    mode.setSubtitle(getString(R.string.selected) + "  1");
+                // Only process commands if at least one bookmark is selected.  Otherwise, a context menu with 0 selected bookmarks is briefly displayed.
+                if (numberOfSelectedBookmarks > 0) {
+                    // Adjust the ActionMode and the menu according to the number of selected bookmarks.
+                    if (numberOfSelectedBookmarks == 1) {  // One bookmark is selected.
+                        // List the number of selected bookmarks in the subtitle.
+                        mode.setSubtitle(getString(R.string.selected) + "  1");
 
-                    // Show the `Move Up`, `Move Down`, and  `Edit` options.
-                    moveBookmarkUpMenuItem.setVisible(true);
-                    moveBookmarkDownMenuItem.setVisible(true);
-                    editBookmarkMenuItem.setVisible(true);
+                        // Show the `Move Up`, `Move Down`, and  `Edit` options.
+                        moveBookmarkUpMenuItem.setVisible(true);
+                        moveBookmarkDownMenuItem.setVisible(true);
+                        editBookmarkMenuItem.setVisible(true);
 
-                    // Update the enabled status of the move icons.
-                    updateMoveIcons();
-                } else {  // More than one bookmark is selected.
-                    // List the number of selected bookmarks in the subtitle.
-                    mode.setSubtitle(getString(R.string.selected) + "  " + numberOfSelectedBookmarks);
-
-                    // Hide non-applicable `MenuItems`.
-                    moveBookmarkUpMenuItem.setVisible(false);
-                    moveBookmarkDownMenuItem.setVisible(false);
-                    editBookmarkMenuItem.setVisible(false);
-                }
-
-                // Do not show the select all menu item if all the bookmarks are already checked.
-                if (bookmarksListView.getCheckedItemCount() == bookmarksListView.getCount()) {
-                    selectAllBookmarksMenuItem.setVisible(false);
-                } else {
-                    selectAllBookmarksMenuItem.setVisible(true);
+                        // Update the enabled status of the move icons.
+                        updateMoveIcons();
+                    } else {  // More than one bookmark is selected.
+                        // List the number of selected bookmarks in the subtitle.
+                        mode.setSubtitle(getString(R.string.selected) + "  " + numberOfSelectedBookmarks);
+
+                        // Hide non-applicable `MenuItems`.
+                        moveBookmarkUpMenuItem.setVisible(false);
+                        moveBookmarkDownMenuItem.setVisible(false);
+                        editBookmarkMenuItem.setVisible(false);
+                    }
+
+                    // Show the select all menu item if all the bookmarks are not selected.
+                    selectAllBookmarksMenuItem.setVisible(bookmarksListView.getCheckedItemCount() != bookmarksListView.getCount());
                 }
             }
 
             @Override
-            public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
-                // Instantiate the common variables.
-                int selectedBookmarkPosition;
+            public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) {
+                // Declare the common variables.
                 int selectedBookmarkNewPosition;
                 final SparseBooleanArray selectedBookmarksPositionsSparseBooleanArray;
 
-                switch (item.getItemId()) {
-                    case R.id.move_bookmark_up:
-                        // Get the array of checked bookmark positions.
-                        selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
-
-                        // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_up` is enabled.
-                        selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
-
-                        // Calculate the new position of the selected bookmark.
-                        selectedBookmarkNewPosition = selectedBookmarkPosition - 1;
-
-                        // Iterate through the bookmarks.
-                        for (int i = 0; i < bookmarksListView.getCount(); i++) {
-                            // Get the database ID for the current bookmark.
-                            int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
-
-                            // Update the display order for the current bookmark.
-                            if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
-                                // Move the current bookmark up one.
-                                bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
-                            } else if ((i + 1) == selectedBookmarkPosition){  // The current bookmark is immediately above the selected bookmark.
-                                // Move the current bookmark down one.
-                                bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
-                            } else {  // The current bookmark is not changing positions.
-                                // Move `bookmarksCursor` to the current bookmark position.
-                                bookmarksCursor.moveToPosition(i);
-
-                                // Update the display order only if it is not correct in the database.
-                                if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
-                                    bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
-                                }
+                // Initialize the selected bookmark position.
+                int selectedBookmarkPosition = 0;
+
+                // Get the menu item ID.
+                int menuItemId = menuItem.getItemId();
+
+                // Run the commands according to the selected action item.
+                if (menuItemId == R.id.move_bookmark_up) {  // Move the bookmark up.
+                    // Get the array of checked bookmark positions.
+                    selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
+
+                    // Get the position of the bookmark that is selected.  If other bookmarks have previously been selected they will be included in the sparse boolean array with a value of `false`.
+                    for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
+                        // Check to see if the value for the bookmark is true, meaning it is currently selected.
+                        if (selectedBookmarksPositionsSparseBooleanArray.valueAt(i)) {
+                            // Only one bookmark should have a value of `true` when move bookmark up is enabled.
+                            selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(i);
+                        }
+                    }
+
+                    // Calculate the new position of the selected bookmark.
+                    selectedBookmarkNewPosition = selectedBookmarkPosition - 1;
+
+                    // Iterate through the bookmarks.
+                    for (int i = 0; i < bookmarksListView.getCount(); i++) {
+                        // Get the database ID for the current bookmark.
+                        int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+
+                        // Update the display order for the current bookmark.
+                        if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
+                            // Move the current bookmark up one.
+                            bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
+                        } else if ((i + 1) == selectedBookmarkPosition) {  // The current bookmark is immediately above the selected bookmark.
+                            // Move the current bookmark down one.
+                            bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
+                        } else {  // The current bookmark is not changing positions.
+                            // Move `bookmarksCursor` to the current bookmark position.
+                            bookmarksCursor.moveToPosition(i);
+
+                            // Update the display order only if it is not correct in the database.
+                            if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
+                                bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
                             }
                         }
+                    }
 
-                        // Update the bookmarks cursor with the current contents of the bookmarks database.
-                        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
+                    // Update the bookmarks cursor with the current contents of the bookmarks database.
+                    bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 
-                        // Update the `ListView`.
-                        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+                    // Update the list view.
+                    bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                        // Scroll with the bookmark.
-                        scrollBookmarks(selectedBookmarkNewPosition);
+                    // Scroll with the bookmark.
+                    scrollBookmarks(selectedBookmarkNewPosition);
 
-                        // Update the enabled status of the move icons.
-                        updateMoveIcons();
-                        break;
-
-                    case R.id.move_bookmark_down:
-                        // Get the array of checked bookmark positions.
-                        selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
-
-                        // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_down` is enabled.
-                        selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
-
-                        // Calculate the new position of the selected bookmark.
-                        selectedBookmarkNewPosition = selectedBookmarkPosition + 1;
-
-                        // Iterate through the bookmarks.
-                        for (int i = 0; i <bookmarksListView.getCount(); i++) {
-                            // Get the database ID for the current bookmark.
-                            int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
-
-                            // Update the display order for the current bookmark.
-                            if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
-                                // Move the current bookmark down one.
-                                bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
-                            } else if ((i - 1) == selectedBookmarkPosition) {  // The current bookmark is immediately below the selected bookmark.
-                                // Move the bookmark below the selected bookmark up one.
-                                bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
-                            } else {  // The current bookmark is not changing positions.
-                                // Move `bookmarksCursor` to the current bookmark position.
-                                bookmarksCursor.moveToPosition(i);
-
-                                // Update the display order only if it is not correct in the database.
-                                if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
-                                    bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
-                                }
+                    // Update the enabled status of the move icons.
+                    updateMoveIcons();
+                } else if (menuItemId == R.id.move_bookmark_down) {  // Move the bookmark down.
+                    // Get the array of checked bookmark positions.
+                    selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
+
+                    // Get the position of the bookmark that is selected.  If other bookmarks have previously been selected they will be included in the sparse boolean array with a value of `false`.
+                    for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
+                        // Check to see if the value for the bookmark is true, meaning it is currently selected.
+                        if (selectedBookmarksPositionsSparseBooleanArray.valueAt(i)) {
+                            // Only one bookmark should have a value of `true` when move bookmark down is enabled.
+                            selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(i);
+                        }
+                    }
+
+                    // Calculate the new position of the selected bookmark.
+                    selectedBookmarkNewPosition = selectedBookmarkPosition + 1;
+
+                    // Iterate through the bookmarks.
+                    for (int i = 0; i < bookmarksListView.getCount(); i++) {
+                        // Get the database ID for the current bookmark.
+                        int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+
+                        // Update the display order for the current bookmark.
+                        if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
+                            // Move the current bookmark down one.
+                            bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
+                        } else if ((i - 1) == selectedBookmarkPosition) {  // The current bookmark is immediately below the selected bookmark.
+                            // Move the bookmark below the selected bookmark up one.
+                            bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
+                        } else {  // The current bookmark is not changing positions.
+                            // Move `bookmarksCursor` to the current bookmark position.
+                            bookmarksCursor.moveToPosition(i);
+
+                            // Update the display order only if it is not correct in the database.
+                            if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
+                                bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
                             }
                         }
+                    }
 
-                        // Update the bookmarks cursor with the current contents of the bookmarks database.
-                        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
+                    // Update the bookmarks cursor with the current contents of the bookmarks database.
+                    bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 
-                        // Update the `ListView`.
-                        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+                    // Update the list view.
+                    bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                        // Scroll with the bookmark.
-                        scrollBookmarks(selectedBookmarkNewPosition);
+                    // Scroll with the bookmark.
+                    scrollBookmarks(selectedBookmarkNewPosition);
 
-                        // Update the enabled status of the move icons.
-                        updateMoveIcons();
-                        break;
-
-                    case R.id.move_to_folder:
-                        // Store `checkedItemIds` for use by the `AlertDialog`.
-                        checkedItemIds = bookmarksListView.getCheckedItemIds();
-
-                        // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
-                        DialogFragment moveToFolderDialog = new MoveToFolderDialog();
-                        moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
-                        break;
-
-                    case R.id.edit_bookmark:
-                        // Get the array of checked bookmark positions.
-                        selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
-
-                        // Get the position of the selected bookmark.  Only one bookmark is selected when `edit_bookmark_down` is enabled.
-                        selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
-
-                        // Move the `Cursor` to the selected position and find out if it is a folder.
-                        bookmarksCursor.moveToPosition(selectedBookmarkPosition);
-                        boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
-
-                        // Get the selected bookmark database ID.
-                        int databaseId = bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
-
-                        // Show the edit bookmark or edit bookmark folder dialog.
-                        if (isFolder) {
-                            // Save the current folder name, which is used in `onSaveBookmarkFolder()`.
-                            oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
-
-                            // Show the edit bookmark folder dialog.
-                            DialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, favoriteIconBitmap);
-                            editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
-                        } else {
-                            // Show the edit bookmark dialog.
-                            DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, favoriteIconBitmap);
-                            editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
+                    // Update the enabled status of the move icons.
+                    updateMoveIcons();
+                } else if (menuItemId == R.id.move_to_folder) {  // Move to folder.
+                    // Instantiate the move to folder alert dialog.
+                    DialogFragment moveToFolderDialog = MoveToFolderDialog.moveBookmarks(currentFolder, bookmarksListView.getCheckedItemIds());
+
+                    // Show the move to folder alert dialog.
+                    moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
+                } else if (menuItemId == R.id.edit_bookmark) {
+                    // Get the array of checked bookmark positions.
+                    selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
+
+                    // Get the position of the bookmark that is selected.  If other bookmarks have previously been selected they will be included in the sparse boolean array with a value of `false`.
+                    for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
+                        // Check to see if the value for the bookmark is true, meaning it is currently selected.
+                        if (selectedBookmarksPositionsSparseBooleanArray.valueAt(i)) {
+                            // Only one bookmark should have a value of `true` when move edit bookmark is enabled.
+                            selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(i);
                         }
-                        break;
-
-                    case R.id.delete_bookmark:
-                        // Set the deleting bookmarks flag, which prevents the delete menu item from being enabled until the current process finishes.
-                        deletingBookmarks = true;
-
-                        // Get an array of the selected row IDs.
-                        final long[] selectedBookmarksIdsLongArray = bookmarksListView.getCheckedItemIds();
-
-                        // Get an array of checked bookmarks.  `.clone()` makes a copy that won't change if the list view is reloaded, which is needed for re-selecting the bookmarks on undelete.
-                        selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions().clone();
-
-                        // Update the bookmarks cursor with the current contents of the bookmarks database except for the specified database IDs.
-                        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrderExcept(selectedBookmarksIdsLongArray, currentFolder);
-
-                        // Update the list view.
-                        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-
-                        // Create a Snackbar with the number of deleted bookmarks.
-                        bookmarksDeletedSnackbar = Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.bookmarks_deleted) + "  " + selectedBookmarksIdsLongArray.length,
-                                Snackbar.LENGTH_LONG)
-                                .setAction(R.string.undo, view -> {
-                                    // Do nothing because everything will be handled by `onDismissed()` below.
-                                })
-                                .addCallback(new Snackbar.Callback() {
-                                    @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
-                                    @Override
-                                    public void onDismissed(Snackbar snackbar, int event) {
-                                        if (event == Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The user pushed the undo button.
-                                            // Update the bookmarks cursor with the current contents of the bookmarks database, including the "deleted" bookmarks.
-                                            bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
-
-                                            // Update the list view.
-                                            bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-
-                                            // Re-select the previously selected bookmarks.
-                                            for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
-                                                bookmarksListView.setItemChecked(selectedBookmarksPositionsSparseBooleanArray.keyAt(i), true);
-                                            }
-                                        } else {  // The snackbar was dismissed without the undo button being pushed.
-                                            // Delete each selected bookmark.
-                                            for (long databaseIdLong : selectedBookmarksIdsLongArray) {
-                                                // Convert `databaseIdLong` to an int.
-                                                int databaseIdInt = (int) databaseIdLong;
-
-                                                // Delete the contents of the folder if the selected bookmark is a folder.
-                                                if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
-                                                    deleteBookmarkFolderContents(databaseIdInt);
-                                                }
-
-                                                // Delete the selected bookmark.
-                                                bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
-                                            }
+                    }
+
+                    // Move the cursor to the selected position.
+                    bookmarksCursor.moveToPosition(selectedBookmarkPosition);
+
+                    // Find out if this bookmark is a folder.
+                    boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
+
+                    // Get the selected bookmark database ID.
+                    int databaseId = bookmarksCursor.getInt(bookmarksCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper._ID));
+
+                    // Show the edit bookmark or edit bookmark folder dialog.
+                    if (isFolder) {
+                        // Save the current folder name, which is used in `onSaveBookmarkFolder()`.
+                        oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.BOOKMARK_NAME));
+
+                        // Instantiate the edit bookmark folder dialog.
+                        DialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, favoriteIconBitmap);
 
-                                            // Update the display order.
-                                            for (int i = 0; i < bookmarksListView.getCount(); i++) {
-                                                // Get the database ID for the current bookmark.
-                                                int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+                        // Make it so.
+                        editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
+                    } else {
+                        // Instantiate the edit bookmark dialog.
+                        DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, favoriteIconBitmap);
 
-                                                // Move `bookmarksCursor` to the current bookmark position.
-                                                bookmarksCursor.moveToPosition(i);
+                        // Make it so.
+                        editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
+                    }
+                } else if (menuItemId == R.id.delete_bookmark) {  // Delete bookmark.
+                    // Set the deleting bookmarks flag, which prevents the delete menu item from being enabled until the current process finishes.
+                    deletingBookmarks = true;
 
-                                                // Update the display order only if it is not correct in the database.
-                                                if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
-                                                    bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
-                                                }
+                    // Get an array of the selected row IDs.
+                    final long[] selectedBookmarksIdsLongArray = bookmarksListView.getCheckedItemIds();
+
+                    // Initialize a variable to count the number of bookmarks to delete.
+                    int numberOfBookmarksToDelete = 0;
+
+                    // Count the number of bookmarks.
+                    for (long databaseIdLong : selectedBookmarksIdsLongArray) {
+                        // Convert the database ID long to an int.
+                        int databaseIdInt = (int) databaseIdLong;
+
+                        // Count the contents of the folder if the selected bookmark is a folder.
+                        if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
+                            // Add the bookmarks from the folder to the running total.
+                            numberOfBookmarksToDelete = numberOfBookmarksToDelete + countBookmarkFolderContents(databaseIdInt);
+                        }
+
+                        // Increment the count of the number of bookmarks to delete.
+                        numberOfBookmarksToDelete++;
+                    }
+
+                    // Get an array of checked bookmarks.  `.clone()` makes a copy that won't change if the list view is reloaded, which is needed for re-selecting the bookmarks on undelete.
+                    selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions().clone();
+
+                    // Update the bookmarks cursor with the current contents of the bookmarks database except for the specified database IDs.
+                    bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrderExcept(selectedBookmarksIdsLongArray, currentFolder);
+
+                    // Update the list view.
+                    bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+
+                    // Create a Snackbar with the number of deleted bookmarks.
+                    bookmarksDeletedSnackbar = Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.bookmarks_deleted) + "  " + numberOfBookmarksToDelete,
+                            Snackbar.LENGTH_LONG)
+                            .setAction(R.string.undo, view -> {
+                                // Do nothing because everything will be handled by `onDismissed()` below.
+                            })
+                            .addCallback(new Snackbar.Callback() {
+                                @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                                @Override
+                                public void onDismissed(Snackbar snackbar, int event) {
+                                    if (event == Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The user pushed the undo button.
+                                        // Update the bookmarks cursor with the current contents of the bookmarks database, including the "deleted" bookmarks.
+                                        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
+
+                                        // Update the list view.
+                                        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+
+                                        // Re-select the previously selected bookmarks.
+                                        for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
+                                            bookmarksListView.setItemChecked(selectedBookmarksPositionsSparseBooleanArray.keyAt(i), true);
+                                        }
+                                    } else {  // The snackbar was dismissed without the undo button being pushed.
+                                        // Delete each selected bookmark.
+                                        for (long databaseIdLong : selectedBookmarksIdsLongArray) {
+                                            // Convert `databaseIdLong` to an int.
+                                            int databaseIdInt = (int) databaseIdLong;
+
+                                            // Delete the contents of the folder if the selected bookmark is a folder.
+                                            if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
+                                                deleteBookmarkFolderContents(databaseIdInt);
                                             }
+
+                                            // Delete the selected bookmark.
+                                            bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
                                         }
 
-                                        // Reset the deleting bookmarks flag.
-                                        deletingBookmarks = false;
+                                        // Update the display order.
+                                        for (int i = 0; i < bookmarksListView.getCount(); i++) {
+                                            // Get the database ID for the current bookmark.
+                                            int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 
-                                        // Enable the delete bookmarks menu item.
-                                        deleteBookmarksMenuItem.setEnabled(true);
+                                            // Move `bookmarksCursor` to the current bookmark position.
+                                            bookmarksCursor.moveToPosition(i);
 
-                                        // Close the activity if back has been pressed.
-                                        if (closeActivityAfterDismissingSnackbar) {
-                                            onBackPressed();
+                                            // Update the display order only if it is not correct in the database.
+                                            if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
+                                                bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
+                                            }
                                         }
                                     }
-                                });
 
-                        //Show the Snackbar.
-                        bookmarksDeletedSnackbar.show();
-                        break;
+                                    // Reset the deleting bookmarks flag.
+                                    deletingBookmarks = false;
 
-                    case R.id.context_menu_select_all_bookmarks:
-                        // Get the total number of bookmarks.
-                        int numberOfBookmarks = bookmarksListView.getCount();
+                                    // Enable the delete bookmarks menu item.
+                                    deleteBookmarksMenuItem.setEnabled(true);
 
-                        // Select them all.
-                        for (int i = 0; i < numberOfBookmarks; i++) {
-                            bookmarksListView.setItemChecked(i, true);
-                        }
-                        break;
+                                    // Close the activity if back has been pressed.
+                                    if (closeActivityAfterDismissingSnackbar) {
+                                        onBackPressed();
+                                    }
+                                }
+                            });
+
+                    //Show the Snackbar.
+                    bookmarksDeletedSnackbar.show();
+                } else if (menuItemId == R.id.context_menu_select_all_bookmarks) {  // Select all.
+                    // Get the total number of bookmarks.
+                    int numberOfBookmarks = bookmarksListView.getCount();
+
+                    // Select them all.
+                    for (int i = 0; i < numberOfBookmarks; i++) {
+                        bookmarksListView.setItemChecked(i, true);
+                    }
                 }
 
                 // Consume the click.
@@ -558,7 +590,7 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
             }
         });
 
-        // Get handles for the `FloatingActionButtons`.
+        // Get handles for the floating action buttons.
         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
 
@@ -571,7 +603,7 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
             createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
         });
 
-        // Set the create new bookmark FAB to display the `AlertDialog`.
+        // Set the create new bookmark FAB to display the alert dialog.
         createBookmarkFab.setOnClickListener(view -> {
             // Remove the incorrect lint warning below.
             assert currentUrl != null;
@@ -583,6 +615,22 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
             // Display the create bookmark dialog.
             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
         });
+
+        // Restore the state if the app has been restarted.
+        if (savedInstanceState != null) {
+            // Update the bookmarks list view after it has loaded.
+            bookmarksListView.post(() -> {
+                // Get the checked bookmarks array list.
+                ArrayList<Integer> checkedBookmarksArrayList = savedInstanceState.getIntegerArrayList(CHECKED_BOOKMARKS_ARRAY_LIST);
+
+                // Check each previously checked bookmark in the list view.  When the minimum API >= 24 a `forEach()` command can be used instead.
+                if (checkedBookmarksArrayList != null) {
+                    for (int i = 0; i < checkedBookmarksArrayList.size(); i++) {
+                        bookmarksListView.setItemChecked(checkedBookmarksArrayList.get(i), true);
+                    }
+                }
+            });
+        }
     }
 
     @Override
@@ -600,6 +648,30 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         }
     }
 
+    @Override
+    public void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onSaveInstanceState(savedInstanceState);
+
+        // Get the array of the checked items.
+        SparseBooleanArray checkedBookmarksSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
+
+        // Create a checked items array list.
+        ArrayList<Integer> checkedBookmarksArrayList = new ArrayList<>();
+
+        // Add each checked bookmark position to the array list.
+        for (int i = 0; i < checkedBookmarksSparseBooleanArray.size(); i++) {
+            // Check to see if the bookmark is currently checked.  Bookmarks that have previously been checked but currently aren't will be populated in the sparse boolean array, but will return false.
+            if (checkedBookmarksSparseBooleanArray.valueAt(i)) {
+                // Add the bookmark position to the checked bookmarks array list.
+                checkedBookmarksArrayList.add(checkedBookmarksSparseBooleanArray.keyAt(i));
+            }
+        }
+
+        // Store the checked items array list in the saved instance state.
+        savedInstanceState.putIntegerArrayList(CHECKED_BOOKMARKS_ARRAY_LIST, checkedBookmarksArrayList);
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu.
@@ -611,40 +683,43 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
 
     @Override
     public boolean onOptionsItemSelected(MenuItem menuItem) {
-        switch (menuItem.getItemId()) {
-            case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
-                if (currentFolder.isEmpty()) {  // Currently in the home folder.
-                    // Run the back commands.
-                    onBackPressed();
-                } else {  // Currently in a subfolder.
-                    // Place the former parent folder in `currentFolder`.
-                    currentFolder = bookmarksDatabaseHelper.getParentFolderName(currentFolder);
-
-                    // Load the new folder.
-                    loadFolder();
-                }
-                break;
+        // Get a handle for the menu item ID.
+        int menuItemId = menuItem.getItemId();
+
+        // Run the command according to the selected option.
+        if (menuItemId == android.R.id.home) {  // Home.  The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
+            if (currentFolder.isEmpty()) {  // Currently in the home folder.
+                // Run the back commands.
+                onBackPressed();
+            } else {  // Currently in a subfolder.
+                // Place the former parent folder in `currentFolder`.
+                currentFolder = bookmarksDatabaseHelper.getParentFolderName(currentFolder);
 
-            case R.id.options_menu_select_all_bookmarks:
-                // Get the total number of bookmarks.
-                int numberOfBookmarks = bookmarksListView.getCount();
+                // Load the new folder.
+                loadFolder();
+            }
+        } else if (menuItemId == R.id.options_menu_select_all_bookmarks) {  // Select all.
+            // Get the total number of bookmarks.
+            int numberOfBookmarks = bookmarksListView.getCount();
 
-                // Select them all.
-                for (int i = 0; i < numberOfBookmarks; i++) {
-                    bookmarksListView.setItemChecked(i, true);
-                }
-                break;
+            // Select them all.
+            for (int i = 0; i < numberOfBookmarks; i++) {
+                bookmarksListView.setItemChecked(i, true);
+            }
+        } else if (menuItemId == R.id.bookmarks_database_view) {
+            // Close the contextual action bar if it is displayed.  This can happen if the bottom app bar is enabled.
+            if (contextualActionMode != null) {
+                contextualActionMode.finish();
+            }
 
-            case R.id.bookmarks_database_view:
-                // Create an intent to launch the bookmarks database view activity.
-                Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
+            // Create an intent to launch the bookmarks database view activity.
+            Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 
-                // Include the favorite icon byte array to the intent.
-                bookmarksDatabaseViewIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
+            // Include the favorite icon byte array to the intent.
+            bookmarksDatabaseViewIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
 
-                // Make it so.
-                startActivity(bookmarksDatabaseViewIntent);
-                break;
+            // Make it so.
+            startActivity(bookmarksDatabaseViewIntent);
         }
         return true;
     }
@@ -720,20 +795,20 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         assert dialog != null;
 
         // Get handles for the views in the dialog fragment.
-        EditText createFolderNameEditText = dialog.findViewById(R.id.create_folder_name_edittext);
-        RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.create_folder_default_icon_radiobutton);
-        ImageView folderIconImageView = dialog.findViewById(R.id.create_folder_default_icon);
+        EditText folderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
+        RadioButton defaultIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
+        ImageView defaultIconImageView = dialog.findViewById(R.id.default_icon_imageview);
 
         // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+        String folderNameString = folderNameEditText.getText().toString();
 
         // Create a folder icon bitmap.
         Bitmap folderIconBitmap;
 
         // Set the folder icon bitmap according to the dialog.
-        if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
+        if (defaultIconRadioButton.isChecked()) {  // Use the default folder icon.
             // Get the default folder icon drawable.
-            Drawable folderIconDrawable = folderIconImageView.getDrawable();
+            Drawable folderIconDrawable = defaultIconImageView.getDrawable();
 
             // Convert the folder icon drawable to a bitmap drawable.
             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
@@ -766,7 +841,7 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         // Update the bookmarks cursor with the current contents of this folder.
         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 
-        // Update the `ListView`.
+        // Update the list view.
         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
         // Scroll to the new folder.
@@ -774,24 +849,24 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
     }
 
     @Override
-    public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
+    public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, @NonNull Bitmap favoriteIconBitmap) {
         // Get the dialog from the dialog fragment.
         Dialog dialog = dialogFragment.getDialog();
 
         // Remove the incorrect lint warning below that the dialog might be null.
         assert dialog != null;
 
-        // Get handles for the views from `dialogFragment`.
-        EditText editBookmarkNameEditText = dialog.findViewById(R.id.edit_bookmark_name_edittext);
-        EditText editBookmarkUrlEditText = dialog.findViewById(R.id.edit_bookmark_url_edittext);
-        RadioButton currentBookmarkIconRadioButton = dialog.findViewById(R.id.edit_bookmark_current_icon_radiobutton);
+        // Get handles for the views from the dialog fragment.
+        EditText bookmarkNameEditText = dialog.findViewById(R.id.bookmark_name_edittext);
+        EditText bookmarkUrlEditText = dialog.findViewById(R.id.bookmark_url_edittext);
+        RadioButton currentIconRadioButton = dialog.findViewById(R.id.current_icon_radiobutton);
 
         // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+        String bookmarkNameString = bookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = bookmarkUrlEditText.getText().toString();
 
         // Update the bookmark.
-        if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
+        if (currentIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
         } else {  // Update the bookmark using the WebView favorite icon.
             // Create a favorite icon byte array output stream.
@@ -807,8 +882,11 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
         }
 
-        // Close the contextual action mode.
-        contextualActionMode.finish();
+        // Check to see if the contextual action mode has been created.
+        if (contextualActionMode != null) {
+            // Close the contextual action mode if it is open.
+            contextualActionMode.finish();
+        }
 
         // Update the bookmarks cursor with the contents of the current folder.
         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
@@ -818,18 +896,18 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
     }
 
     @Override
-    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
+    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, @NonNull Bitmap favoriteIconBitmap) {
         // Get the dialog from the dialog fragment.
         Dialog dialog = dialogFragment.getDialog();
 
         // Remove the incorrect lint warning below that the dialog might be null.
         assert dialog != null;
 
-        // Get handles for the views from `dialogFragment`.
-        RadioButton currentFolderIconRadioButton = dialog.findViewById(R.id.edit_folder_current_icon_radiobutton);
-        RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.edit_folder_default_icon_radiobutton);
-        ImageView defaultFolderIconImageView = dialog.findViewById(R.id.edit_folder_default_icon_imageview);
-        EditText editFolderNameEditText = dialog.findViewById(R.id.edit_folder_name_edittext);
+        // Get handles for the views from the dialog fragment.
+        RadioButton currentFolderIconRadioButton = dialog.findViewById(R.id.current_icon_radiobutton);
+        RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
+        ImageView defaultFolderIconImageView = dialog.findViewById(R.id.default_icon_imageview);
+        EditText editFolderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
 
         // Get the new folder name.
         String newFolderNameString = editFolderNameEditText.getText().toString();
@@ -961,20 +1039,52 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         contextualActionMode.finish();
     }
 
+    private int countBookmarkFolderContents(int databaseId) {
+        // Initialize the bookmark counter.
+        int bookmarkCounter = 0;
+
+        // Get the name of the folder.
+        String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
+
+        // Get the contents of the folder.
+        Cursor folderCursor = bookmarksDatabaseHelper.getBookmarkIds(folderName);
+
+        // Count each of the bookmarks in the folder.
+        for (int i = 0; i < folderCursor.getCount(); i++) {
+            // Move the folder cursor to the current row.
+            folderCursor.moveToPosition(i);
+
+            // Get the database ID of the item.
+            int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper._ID));
+
+            // If this is a folder, recursively count the contents first.
+            if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
+                // Add the bookmarks from the folder to the running total.
+                bookmarkCounter = bookmarkCounter + countBookmarkFolderContents(itemDatabaseId);
+            }
+
+            // Add the bookmark to the running total.
+            bookmarkCounter++;
+        }
+
+        // Return the bookmark counter.
+        return bookmarkCounter;
+    }
+
     private void deleteBookmarkFolderContents(int databaseId) {
         // Get the name of the folder.
         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
 
         // Get the contents of the folder.
-        Cursor folderCursor = bookmarksDatabaseHelper.getBookmarkIDs(folderName);
+        Cursor folderCursor = bookmarksDatabaseHelper.getBookmarkIds(folderName);
 
         // Delete each of the bookmarks in the folder.
         for (int i = 0; i < folderCursor.getCount(); i++) {
-            // Move `folderCursor` to the current row.
+            // Move the folder cursor to the current row.
             folderCursor.moveToPosition(i);
 
             // Get the database ID of the item.
-            int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
+            int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndexOrThrow(BookmarksDatabaseHelper._ID));
 
             // If this is a folder, recursively delete the contents first.
             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
@@ -996,45 +1106,34 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         // bookmarksListView is 0 indexed.
         int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 
-        // Get the current theme status.
-        int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
-
-        // Update the move bookmark up `MenuItem`.
+        // Update the move bookmark up menu item.
         if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {  // The selected bookmark is in the first position.
-            // Disable the move bookmark up `MenuItem`.
+            // Disable the move bookmark up menu item.
             moveBookmarkUpMenuItem.setEnabled(false);
 
-            //  Set the move bookmark up icon to be ghosted.
+            //  Set the icon.
             moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_disabled);
         } else {  // The selected bookmark is not in the first position.
             // Enable the move bookmark up menu item.
             moveBookmarkUpMenuItem.setEnabled(true);
 
             // Set the icon according to the theme.
-            if (currentThemeStatus == Configuration.UI_MODE_NIGHT_YES) {
-                moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_night);
-            } else {
-                moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_day);
-            }
+            moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled);
         }
 
-        // Update the move bookmark down `MenuItem`.
+        // Update the move bookmark down menu item.
         if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {  // The selected bookmark is in the last position.
-            // Disable the move bookmark down `MenuItem`.
+            // Disable the move bookmark down menu item.
             moveBookmarkDownMenuItem.setEnabled(false);
 
-            // Set the move bookmark down icon to be ghosted.
+            // Set the icon.
             moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_disabled);
         } else {  // The selected bookmark is not in the last position.
-            // Enable the move bookmark down `MenuItem`.
+            // Enable the move bookmark down menu item.
             moveBookmarkDownMenuItem.setEnabled(true);
 
-            // Set the icon according to the theme.
-            if (currentThemeStatus == Configuration.UI_MODE_NIGHT_YES) {
-                moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_night);
-            } else {
-                moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_day);
-            }
+            // Set the icon.
+            moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled);
         }
     }
 
@@ -1076,7 +1175,7 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
                 TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
 
                 // Get the favorite icon byte array from the `Cursor`.
-                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.FAVORITE_ICON));
 
                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
@@ -1085,11 +1184,11 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 
                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
-                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.BOOKMARK_NAME));
                 bookmarkNameTextView.setText(bookmarkNameString);
 
                 // Make the font bold for folders.
-                if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
+                if (cursor.getInt(cursor.getColumnIndexOrThrow(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
                 } else {  // Reset the font to default for normal bookmarks.
                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);