Add the ability to create and edit bookmark folders.
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / BookmarksActivity.java
index 6d0819913cbb7bf009b597d7e7f6ed028b3130d3..ca004072a54ac11c68d78991849687a2e591b4c5 100644 (file)
@@ -21,50 +21,99 @@ package com.stoutner.privacybrowser;
 
 import android.app.Activity;
 import android.app.DialogFragment;
+import android.content.Context;
+import android.content.Intent;
 import android.database.Cursor;
+import android.database.DatabaseUtils;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.graphics.Typeface;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
 import android.support.v4.app.NavUtils;
+import android.support.v4.content.ContextCompat;
+import android.support.v4.widget.CursorAdapter;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
+import android.util.SparseBooleanArray;
+import android.view.ActionMode;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AbsListView;
 import android.widget.AdapterView;
+import android.widget.CheckBox;
 import android.widget.EditText;
 import android.widget.ImageView;
 import android.widget.ListView;
-import android.widget.SimpleCursorAdapter;
+import android.widget.RadioButton;
+import android.widget.TextView;
 
 import java.io.ByteArrayOutputStream;
 
-public class BookmarksActivity extends AppCompatActivity implements CreateBookmark.CreateBookmarkListener {
-    private BookmarksDatabaseHandler bookmarksDatabaseHandler;
-    private ListView bookmarksListView;
+public class BookmarksActivity extends AppCompatActivity implements CreateBookmark.CreateBookmarkListener,
+        CreateBookmarkFolder.CreateBookmarkFolderListener, EditBookmark.EditBookmarkListener,
+        EditBookmarkFolder.EditBookmarkFolderListener {
+    // `bookmarksDatabaseHandler` is public static so it can be accessed from EditBookmark.  It is also used in `onCreate()`,
+    // `onCreateBookmarkCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
+    public static BookmarksDatabaseHandler bookmarksDatabaseHandler;
+
+    // `bookmarksListView` is public static so it can be accessed from EditBookmark.
+    // It is also used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
+    public static ListView bookmarksListView;
+
+    // `currentFolder` is used in `onCreate`, `onOptionsItemSelected()`, `onCreateBookmarkCreate`, `onCreateBookmarkFolderCreate`, and `onEditBookmarkSave`.
+    private String currentFolder;
+
+    // `contextualActionMode` is used in `onCreate()` and `onEditBookmarkSave()`.
+    private ActionMode contextualActionMode;
+
+    // `selectedBookmarkPosition` is used in `onCreate()` and `onEditBookarkSave()`.
+    private int selectedBookmarkPosition;
+
+    // `appBar` is used in `onCreate()` and `updateBookmarksListView()`.
+    private ActionBar appBar;
+
+    // `bookmarksCursor` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
+    private Cursor bookmarksCursor;
+
+    // `oldFolderName` is used in `onCreate()` and `onEditBookmarkFolderSave()`.
+    private String oldFolderNameString;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.bookmarks_coordinatorlayout);
 
-        // We need to use the SupportActionBar from android.support.v7.app.ActionBar until the minimum API is >= 21.
-        Toolbar bookmarksAppBar = (Toolbar) findViewById(R.id.bookmarks_toolbar);
+        // We need to use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
+        final Toolbar bookmarksAppBar = (Toolbar) findViewById(R.id.bookmarks_toolbar);
         setSupportActionBar(bookmarksAppBar);
 
-        // Display the home arrow on supportAppBar.
-        final ActionBar appBar = getSupportActionBar();
+        // Display the home arrow on `SupportActionBar`.
+        appBar = getSupportActionBar();
         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that appBar might be null.
         appBar.setDisplayHomeAsUpEnabled(true);
 
+
         // Initialize the database handler and the ListView.
+        // `this` specifies the context.  The two `null`s do not specify the database name or a `CursorFactory`.
+        // The `0` is to specify a database version, but that is set instead using a constant in `BookmarksDatabaseHandler`.
         bookmarksDatabaseHandler = new BookmarksDatabaseHandler(this, null, null, 0);
         bookmarksListView = (ListView) findViewById(R.id.bookmarks_listview);
 
+        // Set currentFolder to the home folder, which is null in the database.
+        currentFolder = "";
+
         // Display the bookmarks in the ListView.
-        updateBookmarksListView();
+        updateBookmarksListView(currentFolder);
 
-        // Set a listener so that tapping a list item loads the URL.  We need to store the activity in a variable so that we can return to the parent activity after loading the URL.
+        // Set a listener so that tapping a list item loads the URL.  We need to store the activity
+        // in a variable so that we can return to the parent activity after loading the URL.
         final Activity bookmarksActivity = this;
         bookmarksListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
             @Override
@@ -72,12 +121,318 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
                 // Convert the id from long to int to match the format of the bookmarks database.
                 int databaseID = (int) id;
 
-                // Get the bookmark URL and assign it to formattedUrlString.
-                MainWebViewActivity.formattedUrlString = bookmarksDatabaseHandler.getBookmarkURL(databaseID);
+                // Get the bookmark `Cursor` and move it to the first row.
+                Cursor bookmarkCursor = bookmarksDatabaseHandler.getBookmarkCursor(databaseID);
+                bookmarkCursor.moveToFirst();
+
+                // If the bookmark is a folder load its contents into the ListView.
+                if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
+                    // Update `currentFolder`.
+                    currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
+
+                    // Reload the ListView with `currentFolder`.
+                    updateBookmarksListView(currentFolder);
+                } else {  // Load the URL into `mainWebView`.
+                    // Get the bookmark URL and assign it to formattedUrlString.
+                    MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_URL));
+
+                    //  Load formattedUrlString and return to the main activity.
+                    MainWebViewActivity.mainWebView.loadUrl(MainWebViewActivity.formattedUrlString);
+                    NavUtils.navigateUpFromSameTask(bookmarksActivity);
+                }
+
+                // Close the `Cursor`.
+                bookmarkCursor.close();
+            }
+        });
+
+        // `MultiChoiceModeListener` handles long clicks.
+        bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
+            // `moveBookmarkUpMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
+            MenuItem moveBookmarkUpMenuItem;
+
+            // `moveBookmarkDownMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
+            MenuItem moveBookmarkDownMenuItem;
+
+            // `editBookmarkMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
+            MenuItem editBookmarkMenuItem;
+
+            // `selectAllBookmarks` is used in `onCreateActionMode()` and `onItemCheckedStateChanges`.
+            MenuItem selectAllBookmarksMenuItem;
+
+            @Override
+            public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+                // Inflate the menu for the contextual app bar and set the title.
+                getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
+
+                // Set the title.
+                if (currentFolder.isEmpty()) {
+                    // Use `R.string.bookmarks` if we are in the home folder.
+                    mode.setTitle(R.string.bookmarks);
+                } else {  // Use the current folder name as the title.
+                    mode.setTitle(currentFolder);
+                }
+
+                // Get a handle for MenuItems we need to selectively disable.
+                moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
+                moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
+                editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
+                selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
+
+                return true;
+            }
+
+            @Override
+            public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+                return false;
+            }
+
+            @Override
+            public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
+                // Get an array of the selected bookmarks.
+                long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
+
+                // Calculate the number of selected bookmarks.
+                int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
+
+                // List the number of selected bookmarks in the subtitle.
+                mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
+
+                if (numberOfSelectedBookmarks == 1) {
+                    // Show the `Move Up`, `Move Down`, and  `Edit` option only if 1 bookmark is selected.
+                    moveBookmarkUpMenuItem.setVisible(true);
+                    moveBookmarkDownMenuItem.setVisible(true);
+                    editBookmarkMenuItem.setVisible(true);
+
+                    // Get the database IDs for the bookmarks.
+                    int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
+                    int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
+                    // bookmarksListView is 0 indexed.
+                    int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
+
+                    // Disable `moveBookmarkUpMenuItem` if the selected bookmark is at the top of the ListView.
+                    if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {
+                        moveBookmarkUpMenuItem.setEnabled(false);
+                        moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_disabled);
+                    } else {  // Otherwise enable `moveBookmarkUpMenuItem`.
+                        moveBookmarkUpMenuItem.setEnabled(true);
+                        moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_enabled);
+                    }
+
+                    // Disable `moveBookmarkDownMenuItem` if the selected bookmark is at the bottom of the ListView.
+                    if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {
+                        moveBookmarkDownMenuItem.setEnabled(false);
+                        moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_disabled);
+                    } else {  // Otherwise enable `moveBookmarkDownMenuItem`.
+                        moveBookmarkDownMenuItem.setEnabled(true);
+                        moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_enabled);
+                    }
+                } else {  // Hide the MenuItems because more than one bookmark is selected.
+                    moveBookmarkUpMenuItem.setVisible(false);
+                    moveBookmarkDownMenuItem.setVisible(false);
+                    editBookmarkMenuItem.setVisible(false);
+                }
+
+                // Do not show `Select All` if all the bookmarks are already checked.
+                if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
+                    selectAllBookmarksMenuItem.setVisible(false);
+                } else {
+                    selectAllBookmarksMenuItem.setVisible(true);
+                }
+            }
+
+            @Override
+            public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+                int menuItemId = item.getItemId();
+
+                // `numberOfBookmarks` is used in `R.id.move_bookmark_up_enabled`, `R.id.move_bookmark_down_enabled`, and `R.id.context_menu_select_all_bookmarks`.
+                int numberOfBookmarks;
+
+                // `selectedBookmarkLongArray` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
+                long[]selectedBookmarkLongArray;
+                // `selectedBookmarkDatabaseId` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
+                int selectedBookmarkDatabaseId;
+                // `selectedBookmarkNewPosition` is used in `R.id.move_bookmark_up` and `R.id.move_bookmark_down`.
+                int selectedBookmarkNewPosition;
+                // `bookmarkPositionSparseBooleanArray` is used in `R.id.edit_bookmark` and `R.id.delete_bookmark`.
+                SparseBooleanArray bookmarkPositionSparseBooleanArray;
+
+                switch (menuItemId) {
+                    case R.id.move_bookmark_up:
+                        // Get the selected bookmark database ID.
+                        selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
+                        selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
+
+                        // Initialize `selectedBookmarkNewPosition`.
+                        selectedBookmarkNewPosition = 0;
+
+                        for (int i = 0; i < bookmarksListView.getCount(); i++) {
+                            int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+                            int nextBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i + 1);
+
+                            if (databaseId == selectedBookmarkDatabaseId || nextBookmarkDatabaseId == selectedBookmarkDatabaseId) {
+                                if (databaseId == selectedBookmarkDatabaseId) {
+                                    // Move the selected bookmark up one and store the new bookmark position.
+                                    bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i - 1);
+                                    selectedBookmarkNewPosition = i - 1;
+                                } else {  // Move the bookmark above the selected bookmark down one.
+                                    bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
+                                }
+                            } else {
+                                // Reset the rest of the bookmarks' DISPLAY_ORDER to match the position in the ListView.
+                                // This isn't necessary, but it clears out any stray values that might have crept into the database.
+                                bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i);
+                            }
+                        }
+
+                        // Refresh the ListView.
+                        updateBookmarksListView(currentFolder);
+
+                        // Select the previously selected bookmark in the new location.
+                        bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
+
+                        bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
+
+                        break;
+
+                    case R.id.move_bookmark_down:
+                        // Get the selected bookmark database ID.
+                        selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
+                        selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
+
+                        // Initialize `selectedBookmarkNewPosition`.
+                        selectedBookmarkNewPosition = 0;
+
+                        for (int i = 0; i <bookmarksListView.getCount(); i++) {
+                            int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+                            int previousBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i - 1);
+
+                            if (databaseId == selectedBookmarkDatabaseId || previousBookmarkDatabaseId == selectedBookmarkDatabaseId) {
+                                if (databaseId == selectedBookmarkDatabaseId) {
+                                    // Move the selected bookmark down one and store the new bookmark position.
+                                    bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
+                                    selectedBookmarkNewPosition = i + 1;
+                                } else {  // Move the bookmark below the selected bookmark up one.
+                                    bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i - 1);
+                                }
+                            } else {
+                                // Reset the rest of the bookmark' DISPLAY_ORDER to match the position in the ListView.
+                                // This isn't necessary, but it clears out any stray values that might have crept into the database.
+                                bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i);
+                            }
+                        }
+
+                        // Refresh the ListView.
+                        updateBookmarksListView(currentFolder);
+
+                        // Select the previously selected bookmark in the new location.
+                        bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
+
+                        bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
+                        break;
+
+                    case R.id.edit_bookmark:
+                        // Get a handle for `contextualActionMode` so we can close it when `editBookmarkDialog` is finished.
+                        contextualActionMode = mode;
+
+                        // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
+                        bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
+                        selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(0);
+
+                        // Move to the selected database ID and find out if it is a folder.
+                        bookmarksCursor.moveToPosition(selectedBookmarkPosition);
+                        boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1);
+
+                        if (isFolder) {
+                            // Save the current folder name.
+                            oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
+
+                            // Show the `EditBookmarkFolder` `AlertDialog` and name the instance `@string/edit_folder`.
+                            DialogFragment editFolderDialog = new EditBookmarkFolder();
+                            editFolderDialog.show(getFragmentManager(), getResources().getString(R.string.edit_folder));
+                        } else {
+                            // Show the `EditBookmark` `AlertDialog` and name the instance `@string/edit_bookmark`.
+                            DialogFragment editBookmarkDialog = new EditBookmark();
+                            editBookmarkDialog.show(getFragmentManager(), getResources().getString(R.string.edit_bookmark));
+                        }
+                        break;
+
+                    case R.id.delete_bookmark:
+                        // Get an array of the selected rows.
+                        final long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
+
+                        // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
+                        bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
+                        selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(0);
+
+                        updateBookmarksListViewExcept(selectedBookmarksLongArray, currentFolder);
+
+                        // Scroll to where the deleted bookmark was located.
+                        bookmarksListView.setSelection(selectedBookmarkPosition);
+
+                        String snackbarMessage;
+
+                        // Determine how many items are in the array and prepare an appropriate Snackbar message.
+                        if (selectedBookmarksLongArray.length == 1) {
+                            snackbarMessage = getString(R.string.one_bookmark_deleted);
+                        } else {
+                            snackbarMessage = selectedBookmarksLongArray.length + " " + getString(R.string.bookmarks_deleted);
+                        }
+
+                        // Show a SnackBar.
+                        Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
+                                .setAction(R.string.undo, new View.OnClickListener() {
+                                    @Override
+                                    public void onClick(View view) {
+                                        // Do nothing because everything will be handled by `onDismissed()` below.
+                                    }
+                                })
+                                .setCallback(new Snackbar.Callback() {
+                                    @Override
+                                    public void onDismissed(Snackbar snackbar, int event) {
+                                        switch (event) {
+                                            // The user pushed the "Undo" button.
+                                            case Snackbar.Callback.DISMISS_EVENT_ACTION:
+                                                // Refresh the ListView to show the rows again.
+                                                updateBookmarksListView(currentFolder);
+
+                                                break;
+
+                                            // The Snackbar was dismissed without the "Undo" button being pushed.
+                                            default:
+                                                // Delete each selected row.
+                                                for (long databaseIdLong : selectedBookmarksLongArray) {
+                                                    // Convert `databaseIdLong` to an int.
+                                                    int databaseIdInt = (int) databaseIdLong;
+
+                                                    // Delete the database row.
+                                                    bookmarksDatabaseHandler.deleteBookmark(databaseIdInt);
+                                                }
+                                                break;
+                                        }
+                                    }
+                                })
+                                .show();
+
+                        // Close the contextual app bar.
+                        mode.finish();
+                        break;
+
+                    case R.id.context_menu_select_all_bookmarks:
+                        numberOfBookmarks = bookmarksListView.getCount();
+
+                        for (int i = 0; i < numberOfBookmarks; i++) {
+                            bookmarksListView.setItemChecked(i, true);
+                        }
+                        break;
+                }
+                // Consume the click.
+                return true;
+            }
+
+            @Override
+            public void onDestroyActionMode(ActionMode mode) {
 
-                //  Load formattedUrlString and return to the main activity.
-                MainWebViewActivity.mainWebView.loadUrl(MainWebViewActivity.formattedUrlString);
-                NavUtils.navigateUpFromSameTask(bookmarksActivity);
             }
         });
 
@@ -87,71 +442,346 @@ public class BookmarksActivity extends AppCompatActivity implements CreateBookma
         createBookmarkFAB.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
-                // Show the CreateBookmark AlertDialog and name the instance "@string/create_bookmark".
+                // Show the `CreateBookmark` `AlertDialog` and name the instance `@string/create_bookmark`.
                 DialogFragment createBookmarkDialog = new CreateBookmark();
-                createBookmarkDialog.show(getFragmentManager(), "@string/create_bookmark");
+                createBookmarkDialog.show(getFragmentManager(), getResources().getString(R.string.create_bookmark));
             }
         });
     }
 
     @Override
-    public void onCreateBookmarkCancel(DialogFragment createBookmarkDialogFragment) {
-        // Do nothing because the user selected "Cancel".
+    public boolean onCreateOptionsMenu(Menu menu) {
+        //Inflate the menu.
+        getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
+
+        return true;
     }
 
     @Override
-    public void onCreateBookmarkCreate(DialogFragment createBookmarkDialogFragment) {
-        // Get the EditTexts from the DialogFragment and extract the strings.
-        EditText createBookmarkNameEditText = (EditText) createBookmarkDialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem menuItem) {
+        int menuItemId = menuItem.getItemId();
+
+        switch (menuItemId) {
+            case android.R.id.home:
+                // Exit BookmarksActivity if currently at the home folder.
+                if (currentFolder.isEmpty()) {
+                    NavUtils.navigateUpFromSameTask(this);
+                } else {  // Navigate up one folder.
+                    // Place the former parent folder in `currentFolder`.
+                    currentFolder = bookmarksDatabaseHandler.getParentFolder(currentFolder);
+
+                    updateBookmarksListView(currentFolder);
+                }
+                break;
+
+            case R.id.create_folder:
+                // Show the `CreateBookmarkFolder` `AlertDialog` and name the instance `@string/create_folder`.
+                DialogFragment createBookmarkFolderDialog = new CreateBookmarkFolder();
+                createBookmarkFolderDialog.show(getFragmentManager(), getResources().getString(R.string.create_folder));
+                break;
+
+            case R.id.options_menu_select_all_bookmarks:
+                int numberOfBookmarks = bookmarksListView.getCount();
+
+                for (int i = 0; i < numberOfBookmarks; i++) {
+                    bookmarksListView.setItemChecked(i, true);
+                }
+                break;
+
+            case R.id.bookmarks_database_view:
+                // Launch `BookmarksDatabaseViewActivity`.
+                Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
+                startActivity(bookmarksDatabaseViewIntent);
+                break;
+        }
+        return true;
+    }
+
+    @Override
+    public void onCancelCreateBookmark(DialogFragment dialogFragment) {
+        // Do nothing because the user selected `Cancel`.
+    }
+
+    @Override
+    public void onCreateBookmark(DialogFragment dialogFragment) {
+        // Get the `EditText`s from the `createBookmarkDialogFragment` and extract the strings.
+        EditText createBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        EditText createBookmarkURLEditText = (EditText) createBookmarkDialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
-        String bookmarkURLString = createBookmarkURLEditText.getText().toString();
+        EditText createBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-        // Convert the favoriteIcon Bitmap to a byte array.
+        // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
         MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+
         // Create the bookmark.
-        bookmarksDatabaseHandler.createBookmark(bookmarkNameString, bookmarkURLString, favoriteIconByteArray);
+        bookmarksDatabaseHandler.createBookmark(bookmarkNameString, bookmarkUrlString, newBookmarkDisplayOrder, currentFolder, favoriteIconByteArray);
+
+        // Refresh the ListView.  `setSelection` scrolls to the bottom of the list.
+        updateBookmarksListView(currentFolder);
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
+
+    @Override
+    public void onCancelCreateBookmarkFolder(DialogFragment dialogFragment) {
+        // Do nothing because the user selected `Cancel`.
+    }
+
+    @Override
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment) {
+        // Get `create_folder_name_edit_text` and extract the string.
+        EditText createFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
+        String folderNameString = createFolderNameEditText.getText().toString();
+
+        // Check to see if the folder already exists.
+        Cursor bookmarkFolderCursor = bookmarksDatabaseHandler.getFolderCursor(folderNameString);
+        int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
+        bookmarkFolderCursor.close();
+        if (folderNameString.isEmpty() || (existingFoldersWithNewName > 0)) {
+            String cannotCreateFolder = getResources().getString(R.string.cannot_create_folder) + " \"" + folderNameString + "\"";
+            Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannotCreateFolder, Snackbar.LENGTH_INDEFINITE).show();
+        } else {  // Create the folder.
+            // Get the new folder icon.
+            RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobuttion);
+            Bitmap folderIconBitmap;
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable and convert it to a `Bitmap`.  `this` specifies the current context.
+                Drawable folderIconDrawable = ContextCompat.getDrawable(this, R.drawable.folder_blue_bitmap);
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {
+                folderIconBitmap = MainWebViewActivity.favoriteIcon;
+            }
+
+            // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
+            byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+
+            // Move all the bookmarks down one in the display order.
+            for (int i = 0; i < bookmarksListView.getCount(); i++) {
+                int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+                bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
+            }
+
+            // Create the folder, placing it at the top of the ListView
+            bookmarksDatabaseHandler.createFolder(folderNameString, 0, currentFolder, folderIconByteArray);
+
+            // Refresh the ListView.
+            updateBookmarksListView(currentFolder);
+        }
+    }
+
+    @Override
+    public void onCancelEditBookmark(DialogFragment dialogFragment) {
+        // Do nothing because the user selected `Cancel`.
+    }
+
+    @Override
+    public void onSaveEditBookmark(DialogFragment dialogFragment) {
+        // Get a long array with the the databaseId of the selected bookmark and convert it to an `int`.
+        long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
+        int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
+
+        // Get the `EditText`s from the `editBookmarkDialogFragment` and extract the strings.
+        EditText editBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        EditText editBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+
+        // Get `edit_bookmark_current_icon_radiobutton`.
+        RadioButton currentBookmarkIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
+
+        if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
+            bookmarksDatabaseHandler.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
+        } else {  // Update the bookmark and the favorite icon.
+            // Get the new favorite icon from the `Dialog` and convert it into a `Bitmap`.
+            ImageView newFavoriteIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_web_page_favorite_icon);
+            Drawable newFavoriteIconDrawable = newFavoriteIconImageView.getDrawable();
+            Bitmap newFavoriteIconBitmap = ((BitmapDrawable) newFavoriteIconDrawable).getBitmap();
+
+            // Convert `newFavoriteIconBitmap` into a Byte Array.
+            ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+            newFavoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
+
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHandler.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        }
+
+        // Close the contextual action mode.
+        contextualActionMode.finish();
+
+        // Refresh the `ListView`.  `setSelection` scrolls to the position of the bookmark that was edited.
+        updateBookmarksListView(currentFolder);
+        bookmarksListView.setSelection(selectedBookmarkPosition);
+    }
 
-        // Refresh the ListView.
-        updateBookmarksListView();
+    @Override
+    public void onCancelEditBookmarkFolder(DialogFragment dialogFragment) {
+        // Do nothing because the user selected `Cancel`.
     }
 
-    private void updateBookmarksListView() {
-        // Get a Cursor with the current contents of the bookmarks database.
-        final Cursor bookmarksCursor = bookmarksDatabaseHandler.getBookmarksCursor();
-
-        // The last argument is 0 because no special behavior is required.
-        SimpleCursorAdapter bookmarksAdapter = new SimpleCursorAdapter(this,
-                R.layout.bookmarks_item_linearlayout,
-                bookmarksCursor,
-                new String[] { BookmarksDatabaseHandler.FAVORITEICON, BookmarksDatabaseHandler.BOOKMARK_NAME },
-                new int[] { R.id.bookmark_favorite_icon, R.id.bookmark_name },
-                0);
-
-        // Override the handling of R.id.bookmark_favorite_icon to load an image instead of a string.
-        bookmarksAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
-            public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
-                if (view.getId() == R.id.bookmark_favorite_icon) {
-                    // Get the byte array from the database.
-                    byte[] favoriteIconByteArray = cursor.getBlob(columnIndex);
-
-                    // 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);
-
-                    // Set the favoriteIconBitmap.
-                    ImageView bookmarkFavoriteIcon = (ImageView) view;
-                    bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
-                    return true;
-                } else {  // Process the rest of the bookmarksAdapter with default settings.
-                    return false;
+    @Override
+    public void onSaveEditBookmarkFolder(DialogFragment dialogFragment) {
+        // Get the new folder name.
+        EditText editFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
+        String newFolderNameString = editFolderNameEditText.getText().toString();
+
+        // Check to see if the new folder name is unique.
+        Cursor bookmarkFolderCursor = bookmarksDatabaseHandler.getFolderCursor(newFolderNameString);
+        int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
+        bookmarkFolderCursor.close();
+        if ( ((existingFoldersWithNewName == 0) || newFolderNameString.equals(oldFolderNameString)) && !newFolderNameString.isEmpty()) {
+            // Get a long array with the the databaseId of the selected folder and convert it to an `int`.
+            long[] selectedFolderLongArray = bookmarksListView.getCheckedItemIds();
+            int selectedFolderDatabaseId = (int) selectedFolderLongArray[0];
+
+            // Get the `RadioButtons` from the `Dialog`.
+            RadioButton currentFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
+            RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
+            Bitmap folderIconBitmap;
+
+            // Prepare the favorite icon.
+            if (currentFolderIconRadioButton.isChecked()) {
+                // Update the folder name if it has changed.
+                if (!newFolderNameString.equals(oldFolderNameString)) {
+                    bookmarksDatabaseHandler.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
+
+                    // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
+                    updateBookmarksListView(currentFolder);
+                    bookmarksListView.setSelection(selectedBookmarkPosition);
+                }
+            } else {  // Prepare the new favorite icon.
+                if (defaultFolderIconRadioButton.isChecked()) {
+                    // Get the default folder icon drawable and convert it to a `Bitmap`.  `this` specifies the current context.
+                    Drawable folderIconDrawable = ContextCompat.getDrawable(this, R.drawable.folder_blue_bitmap);
+                    BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+                    folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+                } else {  // Use the web page favorite icon.
+                    folderIconBitmap = MainWebViewActivity.favoriteIcon;
                 }
+
+                // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
+                ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
+                folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
+                byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+
+                bookmarksDatabaseHandler.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
+
+                // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
+                updateBookmarksListView(currentFolder);
+                bookmarksListView.setSelection(selectedBookmarkPosition);
             }
-        });
+        } else {  // Don't edit the folder because the new name is not unique.
+            String cannot_rename_folder = getResources().getString(R.string.cannot_rename_folder) + " \"" + newFolderNameString + "\"";
+            Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannot_rename_folder, Snackbar.LENGTH_INDEFINITE).show();
+        }
+    }
+
+    private void updateBookmarksListView(String folderName) {
+        // Get a `Cursor` with the current contents of the bookmarks database.
+        bookmarksCursor = bookmarksDatabaseHandler.getAllBookmarksCursorByDisplayOrder(folderName);
+
+        // Setup `bookmarksCursorAdapter` with `this` context.  The `false` disables autoRequery.
+        CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
+            @Override
+            public View newView(Context context, Cursor cursor, ViewGroup parent) {
+                // Inflate the individual item layout.  `false` does not attach it to the root.
+                return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
+            }
+
+            @Override
+            public void bindView(View view, Context context, Cursor cursor) {
+                // Get the favorite icon byte array from the `Cursor`.
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHandler.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);
+
+                // Display the bitmap in `bookmarkFavoriteIcon`.
+                ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
+                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+
+
+                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
+                TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
+                bookmarkNameTextView.setText(bookmarkNameString);
+
+                // Make the font bold for folders.
+                if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
+                    // The first argument is `null` because we don't want to chage the font.
+                    bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
+                } else {  // Reset the font to default.
+                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
+                }
+            }
+        };
+
+        // Update the ListView.
+        bookmarksListView.setAdapter(bookmarksCursorAdapter);
+
+        // Set the AppBar title.
+        if (currentFolder.isEmpty()) {
+            appBar.setTitle(R.string.bookmarks);
+        } else {
+            appBar.setTitle(currentFolder);
+        }
+    }
+
+    private void updateBookmarksListViewExcept(long[] exceptIdLongArray, String folderName) {
+        // Get a `Cursor` with the current contents of the bookmarks database except for the specified database IDs.
+        bookmarksCursor = bookmarksDatabaseHandler.getBookmarksCursorExcept(exceptIdLongArray, folderName);
+
+        // Setup `bookmarksCursorAdapter` with `this` context.  The `false` disables autoRequery.
+        CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
+            @Override
+            public View newView(Context context, Cursor cursor, ViewGroup parent) {
+                // Inflate the individual item layout.  `false` does not attach it to the root.
+                return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
+            }
+
+            @Override
+            public void bindView(View view, Context context, Cursor cursor) {
+                // Get the favorite icon byte array from the cursor.
+                byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHandler.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);
+
+                // Display the bitmap in `bookmarkFavoriteIcon`.
+                ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
+                bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
+
+
+                // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
+                String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
+                TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
+                bookmarkNameTextView.setText(bookmarkNameString);
+
+                // Make the font bold for folders.
+                if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
+                    // The first argument is `null` because we don't want to chage the font.
+                    bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
+                } else {  // Reset the font to default.
+                    bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
+                }
+            }
+        };
 
         // Update the ListView.
-        bookmarksListView.setAdapter(bookmarksAdapter);
+        bookmarksListView.setAdapter(bookmarksCursorAdapter);
     }
 }
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