app/src/main/java/com/stoutner/privacybrowser/activities/BookmarksActivity.java

   1 /*
   2  * Copyright © 2016-2017 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   5  *
   6  * Privacy Browser is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Privacy Browser is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.activities;
  21
  22 import android.app.Activity;
  23 import android.content.Context;
  24 import android.content.Intent;
  25 import android.database.Cursor;
  26 import android.graphics.Bitmap;
  27 import android.graphics.BitmapFactory;
  28 import android.graphics.Typeface;
  29 import android.graphics.drawable.BitmapDrawable;
  30 import android.graphics.drawable.Drawable;
  31 import android.os.Bundle;
  32 import android.support.design.widget.FloatingActionButton;
  33 import android.support.design.widget.Snackbar;
  34 import android.support.v4.app.NavUtils;
  35 import android.support.v7.app.ActionBar;
  36 import android.support.v7.app.AppCompatActivity;
  37 import android.support.v7.app.AppCompatDialogFragment;
  38 import android.support.v7.widget.Toolbar;
  39 import android.util.SparseBooleanArray;
  40 import android.view.ActionMode;
  41 import android.view.Menu;
  42 import android.view.MenuItem;
  43 import android.view.View;
  44 import android.view.ViewGroup;
  45 import android.widget.AbsListView;
  46 import android.widget.AdapterView;
  47 import android.widget.CursorAdapter;
  48 import android.widget.EditText;
  49 import android.widget.ImageView;
  50 import android.widget.ListView;
  51 import android.widget.RadioButton;
  52 import android.widget.TextView;
  53
  54 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
  55 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
  56 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
  57 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
  58 import com.stoutner.privacybrowser.dialogs.MoveToFolderDialog;
  59 import com.stoutner.privacybrowser.R;
  60 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
  61
  62 import java.io.ByteArrayOutputStream;
  63
  64 public class BookmarksActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener,
  65         MoveToFolderDialog.MoveToFolderListener {
  66
  67     // `bookmarksDatabaseHelper` is public static so it can be accessed from `EditBookmarkDialog` and `MoveToFolderDialog`.  It is also used in `onCreate()`,
  68     // `onCreateBookmarkCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  69     public static BookmarksDatabaseHelper bookmarksDatabaseHelper;
  70
  71     // `currentFolder` is public static so it can be accessed from `MoveToFolderDialog`.
  72     // It is used in `onCreate`, `onOptionsItemSelected()`, `onCreateBookmarkCreate`, `onCreateBookmarkFolderCreate`, and `onEditBookmarkSave`.
  73     public static String currentFolder;
  74
  75     // `checkedItemIds` is public static so it can be accessed from `EditBookmarkDialog`, `EditBookmarkFolderDialog`, and `MoveToFolderDialog`.
  76     // It is also used in `onActionItemClicked`.
  77     public static long[] checkedItemIds;
  78
  79
  80     // `bookmarksListView` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  81     private ListView bookmarksListView;
  82
  83     // `contextualActionMode` is used in `onCreate()` and `onEditBookmarkSave()`.
  84     private ActionMode contextualActionMode;
  85
  86     // `selectedBookmarkPosition` is used in `onCreate()` and `onEditBookmarkSave()`.
  87     private int selectedBookmarkPosition;
  88
  89     // `appBar` is used in `onCreate()` and `updateBookmarksListView()`.
  90     private ActionBar appBar;
  91
  92     // `bookmarksCursor` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  93     private Cursor bookmarksCursor;
  94
  95     // `oldFolderName` is used in `onCreate()` and `onEditBookmarkFolderSave()`.
  96     private String oldFolderNameString;
  97
  98     @Override
  99     protected void onCreate(Bundle savedInstanceState) {
 100         // Set the activity theme.
 101         if (MainWebViewActivity.darkTheme) {
 102             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
 103         } else {
 104             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
 105         }
 106
 107         // Run the default commands.
 108         super.onCreate(savedInstanceState);
 109
 110         // Set the content view.
 111         setContentView(R.layout.bookmarks_coordinatorlayout);
 112
 113         // Use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
 114         final Toolbar bookmarksAppBar = (Toolbar) findViewById(R.id.bookmarks_toolbar);
 115         setSupportActionBar(bookmarksAppBar);
 116
 117         // Display the home arrow on `SupportActionBar`.
 118         appBar = getSupportActionBar();
 119         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that `appBar` might be null.
 120         appBar.setDisplayHomeAsUpEnabled(true);
 121
 122
 123         // Initialize the database handler and the `ListView`.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
 124         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
 125         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
 126         bookmarksListView = (ListView) findViewById(R.id.bookmarks_listview);
 127
 128         // Set currentFolder to the home folder, which is `""` in the database.
 129         currentFolder = "";
 130
 131         // Display the bookmarks in the ListView.
 132         updateBookmarksListView(currentFolder);
 133
 134         // 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.
 135         final Activity bookmarksActivity = this;
 136         bookmarksListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 137             @Override
 138             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 139                 // Convert the id from long to int to match the format of the bookmarks database.
 140                 int databaseID = (int) id;
 141
 142                 // Get the bookmark `Cursor` for this ID and move it to the first row.
 143                 Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
 144                 bookmarkCursor.moveToFirst();
 145
 146                 // If the bookmark is a folder load its contents into the ListView.
 147                 if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 148                     // Update `currentFolder`.
 149                     currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 150
 151                     // Reload the ListView with `currentFolder`.
 152                     updateBookmarksListView(currentFolder);
 153                 } else {  // Load the URL into `mainWebView`.
 154                     // Get the bookmark URL and assign it to formattedUrlString.  `mainWebView` will automatically reload when `BookmarksActivity` closes.
 155                     MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL));
 156
 157                     NavUtils.navigateUpFromSameTask(bookmarksActivity);
 158                 }
 159
 160                 // Close the `Cursor`.
 161                 bookmarkCursor.close();
 162             }
 163         });
 164
 165         // `MultiChoiceModeListener` handles long clicks.
 166         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
 167             // `moveBookmarkUpMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 168             MenuItem moveBookmarkUpMenuItem;
 169
 170             // `moveBookmarkDownMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 171             MenuItem moveBookmarkDownMenuItem;
 172
 173             // `editBookmarkMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 174             MenuItem editBookmarkMenuItem;
 175
 176             // `selectAllBookmarks` is used in `onCreateActionMode()` and `onItemCheckedStateChanges`.
 177             MenuItem selectAllBookmarksMenuItem;
 178
 179             @Override
 180             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 181                 // Inflate the menu for the contextual app bar and set the title.
 182                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
 183
 184                 // Set the title.
 185                 if (currentFolder.isEmpty()) {
 186                     // Use `R.string.bookmarks` if we are in the home folder.
 187                     mode.setTitle(R.string.bookmarks);
 188                 } else {  // Use the current folder name as the title.
 189                     mode.setTitle(currentFolder);
 190                 }
 191
 192                 // Get a handle for MenuItems we need to selectively disable.
 193                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
 194                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
 195                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
 196                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
 197
 198                 // Store `contextualActionMode` so we can close it programatically.
 199                 contextualActionMode = mode;
 200
 201                 return true;
 202             }
 203
 204             @Override
 205             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 206                 return false;
 207             }
 208
 209             @Override
 210             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 211                 // Get an array of the selected bookmarks.
 212                 long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 213
 214                 // Calculate the number of selected bookmarks.
 215                 int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
 216
 217                 // Adjust the `mode` and the menu for the number of selected bookmarks.
 218                 if (numberOfSelectedBookmarks == 0) {
 219                     mode.finish();
 220                 } else if (numberOfSelectedBookmarks == 1) {
 221                     // List the number of selected bookmarks in the subtitle.
 222                     mode.setSubtitle(getString(R.string.one_selected));
 223
 224                     // Show the `Move Up`, `Move Down`, and  `Edit` options.
 225                     moveBookmarkUpMenuItem.setVisible(true);
 226                     moveBookmarkDownMenuItem.setVisible(true);
 227                     editBookmarkMenuItem.setVisible(true);
 228
 229                     // Get the database IDs for the bookmarks.
 230                     int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 231                     int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
 232                     // bookmarksListView is 0 indexed.
 233                     int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 234
 235                     // Disable `moveBookmarkUpMenuItem` if the selected bookmark is at the top of the ListView.
 236                     if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {
 237                         moveBookmarkUpMenuItem.setEnabled(false);
 238                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_disabled);
 239                     } else {  // Otherwise enable `moveBookmarkUpMenuItem`.
 240                         moveBookmarkUpMenuItem.setEnabled(true);
 241
 242                         // Set the icon according to the theme.
 243                         if (MainWebViewActivity.darkTheme) {
 244                             moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_dark);
 245                         } else {
 246                             moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_light);
 247                         }
 248                     }
 249
 250                     // Disable `moveBookmarkDownMenuItem` if the selected bookmark is at the bottom of the ListView.
 251                     if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {
 252                         moveBookmarkDownMenuItem.setEnabled(false);
 253                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_disabled);
 254                     } else {  // Otherwise enable `moveBookmarkDownMenuItem`.
 255                         moveBookmarkDownMenuItem.setEnabled(true);
 256
 257                         // Set the icon according to the theme.
 258                         if (MainWebViewActivity.darkTheme) {
 259                             moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_dark);
 260                         } else {
 261                             moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_light);
 262                         }
 263                     }
 264                 } else {  // More than one bookmark is selected.
 265                     // List the number of selected bookmarks in the subtitle.
 266                     mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
 267
 268                     // Hide non-applicable `MenuItems`.
 269                     moveBookmarkUpMenuItem.setVisible(false);
 270                     moveBookmarkDownMenuItem.setVisible(false);
 271                     editBookmarkMenuItem.setVisible(false);
 272                 }
 273
 274                 // Do not show `Select All` if all the bookmarks are already checked.
 275                 if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
 276                     selectAllBookmarksMenuItem.setVisible(false);
 277                 } else {
 278                     selectAllBookmarksMenuItem.setVisible(true);
 279                 }
 280             }
 281
 282             @Override
 283             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 284                 // Get the menu item ID.
 285                 int menuItemId = item.getItemId();
 286
 287                 // Instantiate the common variables.
 288                 int numberOfBookmarks;
 289                 int selectedBookmarkNewPosition;
 290                 SparseBooleanArray bookmarkPositionSparseBooleanArray;
 291
 292                 switch (menuItemId) {
 293                     case R.id.move_bookmark_up:
 294                         // Get the array of checked bookmarks.
 295                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 296
 297                         // Store the position of the selected bookmark.
 298                         selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(0);
 299
 300                         // Initialize `selectedBookmarkNewPosition`.
 301                         selectedBookmarkNewPosition = 0;
 302
 303                         // Iterate through the bookmarks.
 304                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 305                             // Get the database ID for the current bookmark.
 306                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 307
 308                             // Update the display order for the current bookmark.
 309                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 310                                 // Move the current bookmark up one.
 311                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(currentBookmarkDatabaseId, i - 1);
 312                                 selectedBookmarkNewPosition = i - 1;
 313                             } else if ((i + 1) == selectedBookmarkPosition){  // The current bookmark is immediately above the selected bookmark.
 314                                 // Move the current bookmark down one.
 315                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(currentBookmarkDatabaseId, i + 1);
 316                             } else {  // The current bookmark is not changing positions.
 317                                 // Move `bookmarksCursor` to the current bookmark position.
 318                                 bookmarksCursor.moveToPosition(i);
 319
 320                                 // Update the display order only if it is not correct in the database.
 321                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 322                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(currentBookmarkDatabaseId, i);
 323                                 }
 324                             }
 325                         }
 326
 327                         // Refresh the ListView.
 328                         updateBookmarksListView(currentFolder);
 329
 330                         // Select the previously selected bookmark in the new location.
 331                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 332
 333                         // Scroll `bookmarksListView` to five items above `selectedBookmarkNewPosition`.
 334                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 335
 336                         break;
 337
 338                     case R.id.move_bookmark_down:
 339                         // Get the array of checked bookmarks.
 340                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 341
 342                         // Store the position of the selected bookmark.
 343                         selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(0);
 344
 345                         // Initialize `selectedBookmarkNewPosition`.
 346                         selectedBookmarkNewPosition = 0;
 347
 348                         // Iterate through the bookmarks.
 349                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 350                             // Get the database ID for the current bookmark.
 351                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 352
 353                             // Update the display order for the current bookmark.
 354                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 355                                 // Move the current bookmark down one.
 356                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(currentBookmarkDatabaseId, i + 1);
 357                                 selectedBookmarkNewPosition = i + 1;
 358                             } else if ((i - 1) == selectedBookmarkPosition) {  // The current bookmark is immediately below the selected bookmark.
 359                                 // Move the bookmark below the selected bookmark up one.
 360                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(currentBookmarkDatabaseId, i - 1);
 361                             } else {  // The current bookmark is not changing positions.
 362                                 // Move `bookmarksCursor` to the current bookmark position.
 363                                 bookmarksCursor.moveToPosition(i);
 364
 365                                 // Update the display order only if it is not correct in the database.
 366                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 367                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(currentBookmarkDatabaseId, i);
 368                                 }
 369                             }
 370                         }
 371
 372                         // Refresh the ListView.
 373                         updateBookmarksListView(currentFolder);
 374
 375                         // Select the previously selected bookmark in the new location.
 376                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 377
 378                         // Scroll `bookmarksListView` to five items above `selectedBookmarkNewPosition`.
 379                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 380                         break;
 381
 382                     case R.id.move_to_folder:
 383                         // Store `checkedItemIds` for use by the `AlertDialog`.
 384                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 385
 386                         // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
 387                         AppCompatDialogFragment moveToFolderDialog = new MoveToFolderDialog();
 388                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
 389                         break;
 390
 391                     case R.id.edit_bookmark:
 392                         // Get the array of checked bookmarks.
 393                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 394
 395                         // Store the position of the selected bookmark.
 396                         selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(0);
 397
 398                         // Move to the selected database ID and find out if it is a folder.
 399                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 400                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
 401
 402                         // Store `checkedItemIds` for use by the `AlertDialog`.
 403                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 404
 405                         if (isFolder) {
 406                             // Save the current folder name.
 407                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 408
 409                             // Show the `EditBookmarkFolderDialog` `AlertDialog` and name the instance `@string/edit_folder`.
 410                             AppCompatDialogFragment editFolderDialog = new EditBookmarkFolderDialog();
 411                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
 412                         } else {
 413                             // Show the `EditBookmarkDialog` `AlertDialog` and name the instance `@string/edit_bookmark`.
 414                             AppCompatDialogFragment editBookmarkDialog = new EditBookmarkDialog();
 415                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
 416                         }
 417                         break;
 418
 419                     case R.id.delete_bookmark:
 420                         // Get an array of the selected rows.
 421                         final long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 422
 423                         // Get the array of checked bookmarks.
 424                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 425
 426                         // Store the position of the first selected bookmark.
 427                         selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(0);
 428
 429                         updateBookmarksListViewExcept(selectedBookmarksLongArray, currentFolder);
 430
 431                         // Scroll to where the first deleted bookmark was located.
 432                         bookmarksListView.setSelection(selectedBookmarkPosition - 5);
 433
 434                         // Create `snackbarMessage`.
 435                         String snackbarMessage;
 436
 437                         // Determine how many items are in the array and prepare an appropriate Snackbar message.
 438                         if (selectedBookmarksLongArray.length == 1) {
 439                             snackbarMessage = getString(R.string.one_bookmark_deleted);
 440                         } else {
 441                             snackbarMessage = selectedBookmarksLongArray.length + " " + getString(R.string.bookmarks_deleted);
 442                         }
 443
 444                         // Show a SnackBar.
 445                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
 446                                 .setAction(R.string.undo, new View.OnClickListener() {
 447                                     @Override
 448                                     public void onClick(View view) {
 449                                         // Do nothing because everything will be handled by `onDismissed()` below.
 450                                     }
 451                                 })
 452                                 .addCallback(new Snackbar.Callback() {
 453                                     @Override
 454                                     public void onDismissed(Snackbar snackbar, int event) {
 455                                         switch (event) {
 456                                             // The user pushed the `Undo` button.
 457                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 458                                                 // Refresh the ListView to show the rows again.
 459                                                 updateBookmarksListView(currentFolder);
 460
 461                                                 // Scroll to where the first deleted bookmark was located.
 462                                                 bookmarksListView.setSelection(selectedBookmarkPosition - 5);
 463                                                 break;
 464
 465                                             // The `Snackbar` was dismissed without the `Undo` button being pushed.
 466                                             default:
 467                                                 // Delete each selected row.
 468                                                 for (long databaseIdLong : selectedBookmarksLongArray) {
 469                                                     // Convert `databaseIdLong` to an int.
 470                                                     int databaseIdInt = (int) databaseIdLong;
 471
 472                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
 473                                                         deleteBookmarkFolderContents(databaseIdInt);
 474                                                     }
 475
 476                                                     // Delete `databaseIdInt`.
 477                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
 478                                                 }
 479
 480                                                 // Update the display order.
 481                                                 for (int i = 0; i < bookmarksListView.getCount(); i++) {
 482                                                     // Get the database ID for the current bookmark.
 483                                                     int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 484
 485                                                     // Move `bookmarksCursor` to the current bookmark position.
 486                                                     bookmarksCursor.moveToPosition(i);
 487
 488                                                     // Update the display order only if it is not correct in the database.
 489                                                     if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 490                                                         bookmarksDatabaseHelper.updateBookmarkDisplayOrder(currentBookmarkDatabaseId, i);
 491                                                     }
 492                                                 }
 493                                                 break;
 494                                         }
 495                                     }
 496                                 })
 497                                 .show();
 498
 499                         // Close the contextual app bar.
 500                         mode.finish();
 501                         break;
 502
 503                     case R.id.context_menu_select_all_bookmarks:
 504                         numberOfBookmarks = bookmarksListView.getCount();
 505
 506                         for (int i = 0; i < numberOfBookmarks; i++) {
 507                             bookmarksListView.setItemChecked(i, true);
 508                         }
 509                         break;
 510                 }
 511                 // Consume the click.
 512                 return true;
 513             }
 514
 515             @Override
 516             public void onDestroyActionMode(ActionMode mode) {
 517
 518             }
 519         });
 520
 521         // Set a FloatingActionButton for creating new bookmarks.
 522         FloatingActionButton createBookmarkFAB = (FloatingActionButton) findViewById(R.id.create_bookmark_fab);
 523         createBookmarkFAB.setOnClickListener(new View.OnClickListener() {
 524             @Override
 525             public void onClick(View view) {
 526                 // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
 527                 AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
 528                 createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
 529             }
 530         });
 531     }
 532
 533     @Override
 534     public boolean onCreateOptionsMenu(Menu menu) {
 535         // Inflate the menu.
 536         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 537
 538         // Success.
 539         return true;
 540     }
 541
 542     @Override
 543     public boolean onOptionsItemSelected(MenuItem menuItem) {
 544         // Get the ID of the `MenuItem` that was selected.
 545         int menuItemId = menuItem.getItemId();
 546
 547         switch (menuItemId) {
 548             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 549                 if (currentFolder.isEmpty()) {  // Exit BookmarksActivity if currently in the home folder.
 550                     NavUtils.navigateUpFromSameTask(this);
 551                 } else {  // Navigate up one folder.
 552                     // Place the former parent folder in `currentFolder`.
 553                     currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 554
 555                     // Update `bookmarksListView`.
 556                     updateBookmarksListView(currentFolder);
 557                 }
 558                 break;
 559
 560             case R.id.create_folder:
 561                 // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
 562                 AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
 563                 createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
 564                 break;
 565
 566             case R.id.options_menu_select_all_bookmarks:
 567                 int numberOfBookmarks = bookmarksListView.getCount();
 568
 569                 for (int i = 0; i < numberOfBookmarks; i++) {
 570                     bookmarksListView.setItemChecked(i, true);
 571                 }
 572                 break;
 573
 574             case R.id.bookmarks_database_view:
 575                 // Launch `BookmarksDatabaseViewActivity`.
 576                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 577                 startActivity(bookmarksDatabaseViewIntent);
 578                 break;
 579         }
 580         return true;
 581     }
 582
 583     @Override
 584     public void onBackPressed() {
 585         if (currentFolder.isEmpty()) {  // Exit BookmarksActivity if currently in the home folder.
 586             super.onBackPressed();
 587         } else {  // Navigate up one folder.
 588             // Place the former parent folder in `currentFolder`.
 589             currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 590
 591             // Reload the `ListView`.
 592             updateBookmarksListView(currentFolder);
 593         }
 594     }
 595
 596     @Override
 597     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
 598         // Get the `EditTexts` from the `dialogFragment`.
 599         EditText createBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 600         EditText createBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 601
 602         // Extract the strings from the `EditTexts`.
 603         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 604         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 605
 606         // Convert the favoriteIcon Bitmap to a byte array.
 607         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 608         // `0` is for lossless compression (the only option for a PNG).
 609         MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 610         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 611
 612         // Display the new bookmark below the current items in the (0 indexed) list.
 613         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 614
 615         // Create the bookmark.
 616         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, newBookmarkDisplayOrder, currentFolder, favoriteIconByteArray);
 617
 618         // Refresh the `ListView`.  `setSelection` scrolls to the bottom of the list.
 619         updateBookmarksListView(currentFolder);
 620         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 621     }
 622
 623     @Override
 624     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 625         // Get `create_folder_name_edit_text` and extract the string.
 626         EditText createFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 627         String folderNameString = createFolderNameEditText.getText().toString();
 628
 629         // Check to see if the folder already exists.
 630         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(folderNameString);
 631         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 632         bookmarkFolderCursor.close();
 633         if (folderNameString.isEmpty() || (existingFoldersWithNewName > 0)) {
 634             String cannotCreateFolder = getResources().getString(R.string.cannot_create_folder) + " \"" + folderNameString + "\"";
 635             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannotCreateFolder, Snackbar.LENGTH_INDEFINITE).show();
 636         } else {  // Create the folder.
 637             // Get the new folder icon `Bitmap`.
 638             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
 639             Bitmap folderIconBitmap;
 640             if (defaultFolderIconRadioButton.isChecked()) {
 641                 // Get the default folder icon `ImageView` from the `Dialog` and convert it to a `Bitmap`.
 642                 ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
 643                 Drawable folderIconDrawable = folderIconImageView.getDrawable();
 644                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 645                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 646             } else {  // Assign `favoriteIcon` from the `WebView`.
 647                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 648             }
 649
 650             // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 651             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 652             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 653             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 654
 655             // Move all the bookmarks down one in the display order.
 656             for (int i = 0; i < bookmarksListView.getCount(); i++) {
 657                 int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 658                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
 659             }
 660
 661             // Create the folder, placing it at the top of the ListView
 662             bookmarksDatabaseHelper.createFolder(folderNameString, 0, currentFolder, folderIconByteArray);
 663
 664             // Refresh the ListView.
 665             updateBookmarksListView(currentFolder);
 666         }
 667     }
 668
 669     @Override
 670     public void onSaveEditBookmark(AppCompatDialogFragment dialogFragment) {
 671         // Get a long array with the the databaseId of the selected bookmark and convert it to an `int`.
 672         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 673         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 674
 675         // Get the `EditText`s from the `editBookmarkDialogFragment` and extract the strings.
 676         EditText editBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 677         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 678         EditText editBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 679         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 680
 681         // Get `edit_bookmark_current_icon_radiobutton`.
 682         RadioButton currentBookmarkIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 683
 684         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 685             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 686         } else {  // Update the bookmark using the `WebView` favorite icon.
 687             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 688             MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 689             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 690
 691             //  Update the bookmark and the favorite icon.
 692             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 693         }
 694
 695         // Close the contextual action mode.
 696         contextualActionMode.finish();
 697
 698         // Refresh the `ListView`.  `setSelection` scrolls to the position of the bookmark that was edited.
 699         updateBookmarksListView(currentFolder);
 700         bookmarksListView.setSelection(selectedBookmarkPosition);
 701     }
 702
 703     @Override
 704     public void onSaveEditBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 705         // Get the new folder name.
 706         EditText editFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 707         String newFolderNameString = editFolderNameEditText.getText().toString();
 708
 709         // Check to see if the new folder name is unique.
 710         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(newFolderNameString);
 711         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 712         bookmarkFolderCursor.close();
 713         if ( ((existingFoldersWithNewName == 0) || newFolderNameString.equals(oldFolderNameString)) && !newFolderNameString.isEmpty()) {
 714             // Get a long array with the the database ID of the selected folder and convert it to an `int`.
 715             long[] selectedFolderLongArray = bookmarksListView.getCheckedItemIds();
 716             int selectedFolderDatabaseId = (int) selectedFolderLongArray[0];
 717
 718             // Get the `RadioButtons` from the `Dialog`.
 719             RadioButton currentFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 720             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 721
 722             // Check if the favorite icon has changed.
 723             if (currentFolderIconRadioButton.isChecked()) {
 724                 // Update the folder name if it has changed without modifying the favorite icon.
 725                 if (!newFolderNameString.equals(oldFolderNameString)) {
 726                     bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 727
 728                     // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 729                     updateBookmarksListView(currentFolder);
 730                     bookmarksListView.setSelection(selectedBookmarkPosition);
 731                 }
 732             } else {  // Update the folder icon.
 733                 // Get the new folder icon `Bitmap`.
 734                 Bitmap folderIconBitmap;
 735                 if (defaultFolderIconRadioButton.isChecked()) {
 736                     // Get the default folder icon `ImageView` from the `Drawable` and convert it to a `Bitmap`.
 737                     ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon);
 738                     Drawable folderIconDrawable = folderIconImageView.getDrawable();
 739                     BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 740                     folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 741                 } else {  // Get the web page icon `ImageView` from the `Dialog`.
 742                     folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 743                 }
 744
 745                 // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 746                 ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 747                 folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 748                 byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 749
 750                 bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
 751
 752                 // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 753                 updateBookmarksListView(currentFolder);
 754                 bookmarksListView.setSelection(selectedBookmarkPosition);
 755             }
 756         } else {  // Don't edit the folder because the new name is not unique.
 757             String cannot_rename_folder = getResources().getString(R.string.cannot_save_folder) + " \"" + newFolderNameString + "\"";
 758             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannot_rename_folder, Snackbar.LENGTH_INDEFINITE).show();
 759         }
 760
 761         // Close the contextual action mode.
 762         contextualActionMode.finish();
 763     }
 764
 765     @Override
 766     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
 767         // Get the new folder database id.
 768         ListView folderListView = (ListView) dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
 769         long[] newFolderLongArray = folderListView.getCheckedItemIds();
 770
 771         if (newFolderLongArray.length == 0) {  // No new folder was selected.
 772             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.cannot_move_bookmarks), Snackbar.LENGTH_INDEFINITE).show();
 773         } else {  // Move the selected bookmarks.
 774             // Get the new folder database ID.
 775             int newFolderDatabaseId = (int) newFolderLongArray[0];
 776
 777             // Instantiate `newFolderName`.
 778             String newFolderName;
 779
 780             if (newFolderDatabaseId == 0) {
 781                 // The new folder is the home folder, represented as `""` in the database.
 782                 newFolderName = "";
 783             } else {
 784                 // Get the new folder name from the database.
 785                 newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
 786             }
 787
 788             // Get a long array with the the database ID of the selected bookmarks.
 789             long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 790             for (long databaseIdLong : selectedBookmarksLongArray) {
 791                 // Get `databaseIdInt` for each selected bookmark.
 792                 int databaseIdInt = (int) databaseIdLong;
 793
 794                 // Move the selected bookmark to the new folder.
 795                 bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
 796             }
 797
 798             // Refresh the `ListView`.
 799             updateBookmarksListView(currentFolder);
 800
 801             // Close the contextual app bar.
 802             contextualActionMode.finish();
 803         }
 804     }
 805
 806     private void updateBookmarksListView(String folderName) {
 807         // Get a `Cursor` with the current contents of the bookmarks database.
 808         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
 809
 810         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 811         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 812             @Override
 813             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 814                 // Inflate the individual item layout.  `false` does not attach it to the root.
 815                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 816             }
 817
 818             @Override
 819             public void bindView(View view, Context context, Cursor cursor) {
 820                 // Get the favorite icon byte array from the `Cursor`.
 821                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 822
 823                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
 824                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 825
 826                 // Display the bitmap in `bookmarkFavoriteIcon`.
 827                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 828                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 829
 830
 831                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 832                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 833                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 834                 bookmarkNameTextView.setText(bookmarkNameString);
 835
 836                 // Make the font bold for folders.
 837                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 838                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
 839                 } else {  // Reset the font to default for normal bookmarks.
 840                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 841                 }
 842             }
 843         };
 844
 845         // Update the ListView.
 846         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 847
 848         // Set the AppBar title.
 849         if (currentFolder.isEmpty()) {
 850             appBar.setTitle(R.string.bookmarks);
 851         } else {
 852             appBar.setTitle(currentFolder);
 853         }
 854     }
 855
 856     private void updateBookmarksListViewExcept(long[] exceptIdLongArray, String folderName) {
 857         // Get a `Cursor` with the current contents of the bookmarks database except for the specified database IDs.
 858         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksCursorExcept(exceptIdLongArray, folderName);
 859
 860         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables autoRequery.
 861         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 862             @Override
 863             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 864                 // Inflate the individual item layout.  `false` does not attach it to the root.
 865                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 866             }
 867
 868             @Override
 869             public void bindView(View view, Context context, Cursor cursor) {
 870                 // Get the favorite icon byte array from the cursor.
 871                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 872
 873                 // Convert the byte array to a Bitmap beginning at the first byte and ending at the last.
 874                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 875
 876                 // Display the bitmap in `bookmarkFavoriteIcon`.
 877                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 878                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 879
 880
 881                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 882                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 883                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 884                 bookmarkNameTextView.setText(bookmarkNameString);
 885
 886                 // Make the font bold for folders.
 887                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 888                     // The first argument is `null` because we don't want to change the font.
 889                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
 890                 } else {  // Reset the font to default.
 891                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 892                 }
 893             }
 894         };
 895
 896         // Update the `ListView`.
 897         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 898     }
 899
 900     private void deleteBookmarkFolderContents(int databaseId) {
 901         // Get the name of the folder.
 902         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
 903
 904         // Get the contents of the folder.
 905         Cursor folderCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
 906
 907         for (int i = 0; i < folderCursor.getCount(); i++) {
 908             // Move `folderCursor` to the current row.
 909             folderCursor.moveToPosition(i);
 910
 911             // Get the database ID of the item.
 912             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 913
 914             // If this is a folder, delete the contents first.
 915             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
 916                 deleteBookmarkFolderContents(itemDatabaseId);
 917             }
 918
 919             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
 920         }
 921     }
 922 }