Fix loading of bookmarks from the Bookmarks Activity. https://redmine.stoutner.com...
[PrivacyBrowser.git] / 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 // `AppCompatDialogFragment` is required instead of `DialogFragment` or an error is produced on API <=22.
38 import android.support.v7.app.AppCompatDialogFragment;
39 import android.support.v7.widget.Toolbar;
40 import android.util.SparseBooleanArray;
41 import android.view.ActionMode;
42 import android.view.Menu;
43 import android.view.MenuItem;
44 import android.view.View;
45 import android.view.ViewGroup;
46 import android.widget.AbsListView;
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,
65         EditBookmarkFolderDialog.EditBookmarkFolderListener, MoveToFolderDialog.MoveToFolderListener {
66
67     // `currentFolder` is public static so it can be accessed from `MoveToFolderDialog`.
68     // It is used in `onCreate`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, and `loadFolder()`.
69     public static String currentFolder;
70
71     // `checkedItemIds` is public static so it can be accessed from `MoveToFolderDialog`.  It is also used in `onCreate()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, and `updateMoveIcons()`.
72     public static long[] checkedItemIds;
73
74
75     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, `deleteBookmarkFolderContents()`,
76     // and `loadFolder().
77     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
78
79     // `bookmarksListView` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, `updateMoveIcons()`, `scrollBookmarks()`,
80     // and `loadFolder()`.
81     private ListView bookmarksListView;
82
83     // `bookmarksCursor` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, `deleteBookmarkFolderContents()`, and `loadFolder()`.
84     private Cursor bookmarksCursor;
85
86     // `bookmarksCursorAdapter` is used in `onCreate(), `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, and `onLoadFolder()`.
87     private CursorAdapter bookmarksCursorAdapter;
88
89     // `contextualActionMode` is used in `onCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()` and `onMoveToFolder()`.
90     private ActionMode contextualActionMode;
91
92     // `appBar` is used in `onCreate()` and `loadFolder()`.
93     private ActionBar appBar;
94
95     // `oldFolderName` is used in `onCreate()` and `onSaveBookmarkFolder()`.
96     private String oldFolderNameString;
97
98     // `moveBookmarkUpMenuItem` is used in `onCreate()` and `updateMoveIcons`.
99     private MenuItem moveBookmarkUpMenuItem;
100
101     // `moveBookmarkDownMenuItem` is used in `onCreate()` and `updateMoveIcons`.
102     private MenuItem moveBookmarkDownMenuItem;
103
104     @Override
105     protected void onCreate(Bundle savedInstanceState) {
106         // Set the activity theme.
107         if (MainWebViewActivity.darkTheme) {
108             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
109         } else {
110             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
111         }
112
113         // Run the default commands.
114         super.onCreate(savedInstanceState);
115
116         // Get the intent that launched the activity.
117         Intent launchingIntent = getIntent();
118
119         // Set the current folder variable.
120         if (launchingIntent.getStringExtra("Current Folder") != null) {  // Set the current folder from the intent.
121             currentFolder = launchingIntent.getStringExtra("Current Folder");
122         } else {  // Set the current folder to be `""`, which is the home folder.
123             currentFolder = "";
124         }
125
126         // Set the content view.
127         setContentView(R.layout.bookmarks_coordinatorlayout);
128
129         // Use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
130         final Toolbar bookmarksAppBar = findViewById(R.id.bookmarks_toolbar);
131         setSupportActionBar(bookmarksAppBar);
132
133         // Get a handle for the activity, the app bar, and the `ListView`.
134         final Activity bookmarksActivity = this;
135         appBar = getSupportActionBar();
136         bookmarksListView = findViewById(R.id.bookmarks_listview);
137
138         // This assert removes the incorrect warning in Android Studio on the following line that `appBar` might be null.
139         assert appBar != null;
140
141         // Display the home arrow on `SupportActionBar`.
142         appBar.setDisplayHomeAsUpEnabled(true);
143
144         // Initialize the database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
145         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
146         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
147
148         // Load the home folder.
149         loadFolder();
150
151         // Set a listener so that tapping a list item loads the URL or folder.
152         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
153             // Convert the id from long to int to match the format of the bookmarks database.
154             int databaseID = (int) id;
155
156             // Get the bookmark cursor for this ID and move it to the first row.
157             Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
158             bookmarkCursor.moveToFirst();
159
160             // Act upon the bookmark according to the type.
161             if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
162                 // Update the current folder.
163                 currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
164
165                 // Load the new folder.
166                 loadFolder();
167             } else {  // The selected bookmark is not a folder.
168                 // Get the bookmark URL and assign it to `formattedUrlString`.
169                 MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL));
170
171                 // Set `MainWebViewActivity` to load the new URL on restart.
172                 MainWebViewActivity.loadUrlOnRestart = true;
173
174                 // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
175                 MainWebViewActivity.currentBookmarksFolder = currentFolder;
176
177                 // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
178                 MainWebViewActivity.restartFromBookmarksActivity = true;
179
180                 // Return to `MainWebViewActivity`.
181                 NavUtils.navigateUpFromSameTask(bookmarksActivity);
182             }
183
184             // Close the `Cursor`.
185             bookmarkCursor.close();
186         });
187
188         // `MultiChoiceModeListener` handles long clicks.
189         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
190             // Instantiate the common variables.
191             MenuItem editBookmarkMenuItem;
192             MenuItem deleteBookmarksMenuItem;
193             MenuItem selectAllBookmarksMenuItem;
194             boolean deletingBookmarks;
195
196             @Override
197             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
198                 // Inflate the menu for the contextual app bar and set the title.
199                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
200
201                 // Set the title.
202                 if (currentFolder.isEmpty()) {
203                     // Use `R.string.bookmarks` if we are in the home folder.
204                     mode.setTitle(R.string.bookmarks);
205                 } else {  // Use the current folder name as the title.
206                     mode.setTitle(currentFolder);
207                 }
208
209                 // Get a handle for `MenuItems` that need to be selectively disabled.
210                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
211                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
212                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
213                 deleteBookmarksMenuItem = menu.findItem(R.id.delete_bookmark);
214                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
215
216                 // Disable the delete bookmarks menu item if a delete is pending.
217                 if (deletingBookmarks) {
218                     deleteBookmarksMenuItem.setEnabled(false);
219                 }
220
221                 // Store `contextualActionMode` so it can be closed programatically.
222                 contextualActionMode = mode;
223
224                 // Make it so.
225                 return true;
226             }
227
228             @Override
229             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
230                 // Get a handle for the move to folder menu item.
231                 MenuItem moveToFolderMenuItem = menu.findItem(R.id.move_to_folder);
232
233                 // Get a `Cursor` with all of the folders.
234                 Cursor folderCursor = bookmarksDatabaseHelper.getAllFoldersCursor();
235
236                 // Enable the move to folder menu item if at least one folder exists.
237                 moveToFolderMenuItem.setVisible(folderCursor.getCount() > 0);
238
239                 // Make it so.
240                 return true;
241             }
242
243             @Override
244             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
245                 // Get a long array of the selected bookmarks.
246                 long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
247
248                 // Calculate the number of selected bookmarks.
249                 int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
250
251                 // Adjust the `ActionMode` and the `Menu` according to the number of selected bookmarks.
252                 if (numberOfSelectedBookmarks == 0) {  // No bookmarks are selected.
253                     // Close the `ActionMode`.
254                     mode.finish();
255                 } else if (numberOfSelectedBookmarks == 1) {  // One bookmark is selected.
256                     // List the number of selected bookmarks in the subtitle.
257                     mode.setSubtitle(getString(R.string.one_selected));
258
259                     // Show the `Move Up`, `Move Down`, and  `Edit` options.
260                     moveBookmarkUpMenuItem.setVisible(true);
261                     moveBookmarkDownMenuItem.setVisible(true);
262                     editBookmarkMenuItem.setVisible(true);
263
264                     // Update the enabled status of the move icons.
265                     updateMoveIcons();
266                 } else {  // More than one bookmark is selected.
267                     // List the number of selected bookmarks in the subtitle.
268                     mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
269
270                     // Hide non-applicable `MenuItems`.
271                     moveBookmarkUpMenuItem.setVisible(false);
272                     moveBookmarkDownMenuItem.setVisible(false);
273                     editBookmarkMenuItem.setVisible(false);
274                 }
275
276                 // Do not show `Select All` if all the bookmarks are already checked.
277                 if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
278                     selectAllBookmarksMenuItem.setVisible(false);
279                 } else {
280                     selectAllBookmarksMenuItem.setVisible(true);
281                 }
282             }
283
284             @Override
285             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
286                 // Get the menu item ID.
287                 int menuItemId = item.getItemId();
288
289                 // Instantiate the common variables.
290                 int selectedBookmarkPosition;
291                 int selectedBookmarkNewPosition;
292                 final SparseBooleanArray selectedBookmarksPositionsSparseBooleanArray;
293
294                 switch (menuItemId) {
295                     case R.id.move_bookmark_up:
296                         // Get the array of checked bookmark positions.
297                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
298
299                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_up` is enabled.
300                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
301
302                         // Calculate the new position of the selected bookmark.
303                         selectedBookmarkNewPosition = selectedBookmarkPosition - 1;
304
305                         // Iterate through the bookmarks.
306                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
307                             // Get the database ID for the current bookmark.
308                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
309
310                             // Update the display order for the current bookmark.
311                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
312                                 // Move the current bookmark up one.
313                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
314                             } else if ((i + 1) == selectedBookmarkPosition){  // The current bookmark is immediately above the selected bookmark.
315                                 // Move the current bookmark down one.
316                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
317                             } else {  // The current bookmark is not changing positions.
318                                 // Move `bookmarksCursor` to the current bookmark position.
319                                 bookmarksCursor.moveToPosition(i);
320
321                                 // Update the display order only if it is not correct in the database.
322                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
323                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
324                                 }
325                             }
326                         }
327
328                         // Update `bookmarksCursor` with the current contents of the bookmarks database.
329                         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
330
331                         // Update the `ListView`.
332                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
333
334                         // Scroll with the bookmark.
335                         scrollBookmarks(selectedBookmarkNewPosition);
336
337                         // Update the enabled status of the move icons.
338                         updateMoveIcons();
339                         break;
340
341                     case R.id.move_bookmark_down:
342                         // Get the array of checked bookmark positions.
343                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
344
345                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_down` is enabled.
346                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
347
348                         // Calculate the new position of the selected bookmark.
349                         selectedBookmarkNewPosition = selectedBookmarkPosition + 1;
350
351                         // Iterate through the bookmarks.
352                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
353                             // Get the database ID for the current bookmark.
354                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
355
356                             // Update the display order for the current bookmark.
357                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
358                                 // Move the current bookmark down one.
359                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
360                             } else if ((i - 1) == selectedBookmarkPosition) {  // The current bookmark is immediately below the selected bookmark.
361                                 // Move the bookmark below the selected bookmark up one.
362                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
363                             } else {  // The current bookmark is not changing positions.
364                                 // Move `bookmarksCursor` to the current bookmark position.
365                                 bookmarksCursor.moveToPosition(i);
366
367                                 // Update the display order only if it is not correct in the database.
368                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
369                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
370                                 }
371                             }
372                         }
373
374                         // Update `bookmarksCursor` with the current contents of the bookmarks database.
375                         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
376
377                         // Update the `ListView`.
378                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
379
380                         // Scroll with the bookmark.
381                         scrollBookmarks(selectedBookmarkNewPosition);
382
383                         // Update the enabled status of the move icons.
384                         updateMoveIcons();
385                         break;
386
387                     case R.id.move_to_folder:
388                         // Store `checkedItemIds` for use by the `AlertDialog`.
389                         checkedItemIds = bookmarksListView.getCheckedItemIds();
390
391                         // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
392                         AppCompatDialogFragment moveToFolderDialog = new MoveToFolderDialog();
393                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
394                         break;
395
396                     case R.id.edit_bookmark:
397                         // Get the array of checked bookmark positions.
398                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
399
400                         // Get the position of the selected bookmark.  Only one bookmark is selected when `edit_bookmark_down` is enabled.
401                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
402
403                         // Move the `Cursor` to the selected position and find out if it is a folder.
404                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
405                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
406
407                         // Get the selected bookmark database ID.
408                         int databaseId = bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
409
410                         // Show the edit bookmark or edit bookmark folder dialog.
411                         if (isFolder) {
412                             // Save the current folder name, which is used in `onSaveBookmarkFolder()`.
413                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
414
415                             // Show the edit bookmark folder dialog.
416                             AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
417                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
418                         } else {
419                             // Show the edit bookmark dialog.
420                             AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
421                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
422                         }
423                         break;
424
425                     case R.id.delete_bookmark:
426                         // Set the deleting bookmarks flag, which prevents the delete menu item from being enabled until the current process finishes.
427                         deletingBookmarks = true;
428
429                         // Get an array of the selected row IDs.
430                         final long[] selectedBookmarksIdsLongArray = bookmarksListView.getCheckedItemIds();
431
432                         // Get the array of checked bookmarks.  `.clone()` makes a copy that won't change if `bookmarksListView` is reloaded, which is needed for re-selecting the bookmarks on undelete.
433                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions().clone();
434
435                         // Update `bookmarksCursor` with the current contents of the bookmarks database except for the specified database IDs.
436                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksCursorExcept(selectedBookmarksIdsLongArray, currentFolder);
437
438                         // Update the `ListView`.
439                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
440
441                         // Instantiate `snackbarMessage`.
442                         String snackbarMessage;
443
444                         // Determine how many items are in the array and prepare an appropriate `Snackbar` message.
445                         if (selectedBookmarksIdsLongArray.length == 1) {
446                             snackbarMessage = getString(R.string.one_bookmark_deleted);
447                         } else {
448                             snackbarMessage = selectedBookmarksIdsLongArray.length + " " + getString(R.string.bookmarks_deleted);
449                         }
450
451                         // Show a SnackBar.
452                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
453                                 .setAction(R.string.undo, view -> {
454                                     // Do nothing because everything will be handled by `onDismissed()` below.
455                                 })
456                                 .addCallback(new Snackbar.Callback() {
457                                     @Override
458                                     public void onDismissed(Snackbar snackbar, int event) {
459                                         switch (event) {
460                                             // The user pushed the `Undo` button.
461                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
462                                                 // Update `bookmarksCursor` with the current contents of the bookmarks database, including the "deleted" bookmarks.
463                                                 bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
464
465                                                 // Update the `ListView`.
466                                                 bookmarksCursorAdapter.changeCursor(bookmarksCursor);
467
468                                                 // Re-select the previously selected bookmarks.
469                                                 for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
470                                                     bookmarksListView.setItemChecked(selectedBookmarksPositionsSparseBooleanArray.keyAt(i), true);
471                                                 }
472
473                                                 break;
474
475                                             // The `Snackbar` was dismissed without the `Undo` button being pushed.
476                                             default:
477                                                 // Delete each selected bookmark.
478                                                 for (long databaseIdLong : selectedBookmarksIdsLongArray) {
479                                                     // Convert `databaseIdLong` to an int.
480                                                     int databaseIdInt = (int) databaseIdLong;
481
482                                                     // Delete the contents of the folder if the selected bookmark is a folder.
483                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
484                                                         deleteBookmarkFolderContents(databaseIdInt);
485                                                     }
486
487                                                     // Delete the selected bookmark.
488                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
489                                                 }
490
491                                                 // Update the display order.
492                                                 for (int i = 0; i < bookmarksListView.getCount(); i++) {
493                                                     // Get the database ID for the current bookmark.
494                                                     int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
495
496                                                     // Move `bookmarksCursor` to the current bookmark position.
497                                                     bookmarksCursor.moveToPosition(i);
498
499                                                     // Update the display order only if it is not correct in the database.
500                                                     if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
501                                                         bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
502                                                     }
503                                                 }
504                                         }
505
506                                         // Enable the delete bookmarks menu item.
507                                         deleteBookmarksMenuItem.setEnabled(true);
508
509                                         // Reset the deleting bookmarks flag.
510                                         deletingBookmarks = false;
511                                     }
512                                 })
513                                 //Show the `SnackBar`.
514                                 .show();
515
516                         // Close the `ActionBar`.
517                         mode.finish();
518                         break;
519
520                     case R.id.context_menu_select_all_bookmarks:
521                         // Get the total number of bookmarks.
522                         int numberOfBookmarks = bookmarksListView.getCount();
523
524                         // Select them all.
525                         for (int i = 0; i < numberOfBookmarks; i++) {
526                             bookmarksListView.setItemChecked(i, true);
527                         }
528                         break;
529                 }
530
531                 // Consume the click.
532                 return true;
533             }
534
535             @Override
536             public void onDestroyActionMode(ActionMode mode) {
537                 // Do nothing.
538             }
539         });
540
541         // Get handles for the `FloatingActionButtons`.
542         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
543         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
544
545         // Set the create new bookmark folder FAB to display the `AlertDialog`.
546         createBookmarkFolderFab.setOnClickListener(v -> {
547             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
548             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
549             createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
550         });
551
552         // Set the create new bookmark FAB to display the `AlertDialog`.
553         createBookmarkFab.setOnClickListener(view -> {
554             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
555             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
556             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
557         });
558     }
559
560     @Override
561     public boolean onCreateOptionsMenu(Menu menu) {
562         // Inflate the menu.
563         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
564
565         // Success.
566         return true;
567     }
568
569     @Override
570     public boolean onOptionsItemSelected(MenuItem menuItem) {
571         // Get the ID of the `MenuItem` that was selected.
572         int menuItemId = menuItem.getItemId();
573
574         switch (menuItemId) {
575             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
576                 if (currentFolder.isEmpty()) {  // Currently in the home folder.
577                     // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
578                     MainWebViewActivity.currentBookmarksFolder = "";
579
580                     // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
581                     MainWebViewActivity.restartFromBookmarksActivity = true;
582
583                     // Return to `MainWebViewActivity`.
584                     NavUtils.navigateUpFromSameTask(this);
585                 } else {  // Currently in a subfolder.
586                     // Place the former parent folder in `currentFolder`.
587                     currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
588
589                     // Load the new folder.
590                     loadFolder();
591                 }
592                 break;
593
594             case R.id.options_menu_select_all_bookmarks:
595                 // Get the total number of bookmarks.
596                 int numberOfBookmarks = bookmarksListView.getCount();
597
598                 // Select them all.
599                 for (int i = 0; i < numberOfBookmarks; i++) {
600                     bookmarksListView.setItemChecked(i, true);
601                 }
602                 break;
603
604             case R.id.bookmarks_database_view:
605                 // Launch `BookmarksDatabaseViewActivity`.
606                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
607                 startActivity(bookmarksDatabaseViewIntent);
608                 break;
609         }
610         return true;
611     }
612
613     @Override
614     public void onBackPressed() {
615         if (currentFolder.isEmpty()) {  // Currently in the home folder.
616             // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
617             MainWebViewActivity.currentBookmarksFolder = "";
618
619             // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
620             MainWebViewActivity.restartFromBookmarksActivity = true;
621
622             // Exit `BookmarksActivity`.
623             super.onBackPressed();
624         } else {  // Currently in a subfolder.
625             // Place the former parent folder in `currentFolder`.
626             currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
627
628             // Load the new folder.
629             loadFolder();
630         }
631     }
632
633     @Override
634     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
635         // Get the `EditTexts` from the `dialogFragment`.
636         EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
637         EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
638
639         // Extract the strings from the `EditTexts`.
640         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
641         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
642
643         // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
644         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
645         MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
646         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
647
648         // Display the new bookmark below the current items in the (0 indexed) list.
649         int newBookmarkDisplayOrder = bookmarksListView.getCount();
650
651         // Create the bookmark.
652         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
653
654         // Update `bookmarksCursor` with the current contents of this folder.
655         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
656
657         // Update the `ListView`.
658         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
659
660         // Scroll to the new bookmark.
661         bookmarksListView.setSelection(newBookmarkDisplayOrder);
662     }
663
664     @Override
665     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
666         // Get handles for the views in `dialogFragment`.
667         EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
668         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
669         ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
670
671         // Get new folder name string.
672         String folderNameString = createFolderNameEditText.getText().toString();
673
674         // Get the new folder icon `Bitmap`.
675         Bitmap folderIconBitmap;
676         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
677             // Get the default folder icon and convert it to a `Bitmap`.
678             Drawable folderIconDrawable = folderIconImageView.getDrawable();
679             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
680             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
681         } else {  // Use the `WebView` favorite icon.
682             folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
683         }
684
685         // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
686         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
687         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
688         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
689
690         // Move all the bookmarks down one in the display order.
691         for (int i = 0; i < bookmarksListView.getCount(); i++) {
692             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
693             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
694         }
695
696         // Create the folder, which will be placed at the top of the `ListView`.
697         bookmarksDatabaseHelper.createFolder(folderNameString, currentFolder, folderIconByteArray);
698
699         // Update `bookmarksCursor` with the current contents of this folder.
700         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
701
702         // Update the `ListView`.
703         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
704
705         // Scroll to the new folder.
706         bookmarksListView.setSelection(0);
707     }
708
709     @Override
710     public void onSaveBookmark(AppCompatDialogFragment dialogFragment, int selectedBookmarkDatabaseId) {
711         // Get handles for the views from `dialogFragment`.
712         EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
713         EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
714         RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
715
716         // Store the bookmark strings.
717         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
718         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
719
720         // Update the bookmark.
721         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
722             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
723         } else {  // Update the bookmark using the `WebView` favorite icon.
724             // Convert the favorite icon to a byte array.  `0` is for lossless compression (the only option for a PNG).
725             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
726             MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
727             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
728
729             //  Update the bookmark and the favorite icon.
730             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
731         }
732
733         // Close the contextual action mode.
734         contextualActionMode.finish();
735
736         // Update `bookmarksCursor` with the contents of the current folder.
737         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
738
739         // Update the `ListView`.
740         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
741     }
742
743     @Override
744     public void onSaveBookmarkFolder(AppCompatDialogFragment dialogFragment, int selectedFolderDatabaseId) {
745         // Get handles for the views from `dialogFragment`.
746         RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
747         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
748         ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
749         EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
750
751         // Get the new folder name.
752         String newFolderNameString = editFolderNameEditText.getText().toString();
753
754         // Check if the favorite icon has changed.
755         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
756             // Update the name in the database.
757             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
758         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
759             // Get the new folder icon `Bitmap`.
760             Bitmap folderIconBitmap;
761             if (defaultFolderIconRadioButton.isChecked()) {
762                 // Get the default folder icon and convert it to a `Bitmap`.
763                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
764                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
765                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
766             } else {  // Use the `WebView` favorite icon.
767                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
768             }
769
770             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
771             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
772             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
773             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
774
775             // Update the folder icon in the database.
776             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, folderIconByteArray);
777         } else {  // The folder icon and the name have changed.
778             // Instantiate the new folder icon `Bitmap`.
779             Bitmap folderIconBitmap;
780
781             // Populate the new folder icon bitmap.
782             if (defaultFolderIconRadioButton.isChecked()) {
783                 // Get the default folder icon and convert it to a `Bitmap`.
784                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
785                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
786                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
787             } else {  // Use the `WebView` favorite icon.
788                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
789             }
790
791             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
792             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
793             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
794             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
795
796             // Update the folder name and icon in the database.
797             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
798         }
799
800         // Update `bookmarksCursor` with the current contents of this folder.
801         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
802
803         // Update the `ListView`.
804         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
805
806         // Close the contextual action mode.
807         contextualActionMode.finish();
808     }
809
810     @Override
811     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
812         // Get a handle for the `ListView` from `dialogFragment`.
813         ListView folderListView = dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
814
815         // Store a long array of the selected folders.
816         long[] newFolderLongArray = folderListView.getCheckedItemIds();
817
818         // Get the new folder database ID.  Only one folder will be selected.
819         int newFolderDatabaseId = (int) newFolderLongArray[0];
820
821         // Instantiate `newFolderName`.
822         String newFolderName;
823
824         // Set the new folder name.
825         if (newFolderDatabaseId == 0) {
826             // The new folder is the home folder, represented as `""` in the database.
827             newFolderName = "";
828         } else {
829             // Get the new folder name from the database.
830             newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
831         }
832
833         // Get a long array with the the database ID of the selected bookmarks.
834         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
835
836         // Move each of the selected bookmarks to the new folder.
837         for (long databaseIdLong : selectedBookmarksLongArray) {
838             // Get `databaseIdInt` for each selected bookmark.
839             int databaseIdInt = (int) databaseIdLong;
840
841             // Move the selected bookmark to the new folder.
842             bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
843         }
844
845         // Update `bookmarksCursor` with the current contents of this folder.
846         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
847
848         // Update the `ListView`.
849         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
850
851         // Close the contextual app bar.
852         contextualActionMode.finish();
853     }
854
855     private void deleteBookmarkFolderContents(int databaseId) {
856         // Get the name of the folder.
857         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
858
859         // Get the contents of the folder.
860         Cursor folderCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
861
862         // Delete each of the bookmarks in the folder.
863         for (int i = 0; i < folderCursor.getCount(); i++) {
864             // Move `folderCursor` to the current row.
865             folderCursor.moveToPosition(i);
866
867             // Get the database ID of the item.
868             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
869
870             // If this is a folder, recursively delete the contents first.
871             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
872                 deleteBookmarkFolderContents(itemDatabaseId);
873             }
874
875             // Delete the bookmark.
876             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
877         }
878     }
879
880     private void updateMoveIcons() {
881         // Get a long array of the selected bookmarks.
882         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
883
884         // Get the database IDs for the first, last, and selected bookmarks.
885         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
886         int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
887         // bookmarksListView is 0 indexed.
888         int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
889
890         // Update the move bookmark up `MenuItem`.
891         if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {  // The selected bookmark is in the first position.
892             // Disable the move bookmark up `MenuItem`.
893             moveBookmarkUpMenuItem.setEnabled(false);
894
895             //  Set the move bookmark up icon to be ghosted.
896             moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_disabled);
897         } else {  // The selected bookmark is not in the first position.
898             // Enable the move bookmark up `MenuItem`.
899             moveBookmarkUpMenuItem.setEnabled(true);
900
901             // Set the icon according to the theme.
902             if (MainWebViewActivity.darkTheme) {
903                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_dark);
904             } else {
905                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_light);
906             }
907         }
908
909         // Update the move bookmark down `MenuItem`.
910         if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {  // The selected bookmark is in the last position.
911             // Disable the move bookmark down `MenuItem`.
912             moveBookmarkDownMenuItem.setEnabled(false);
913
914             // Set the move bookmark down icon to be ghosted.
915             moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_disabled);
916         } else {  // The selected bookmark is not in the last position.
917             // Enable the move bookmark down `MenuItem`.
918             moveBookmarkDownMenuItem.setEnabled(true);
919
920             // Set the icon according to the theme.
921             if (MainWebViewActivity.darkTheme) {
922                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_dark);
923             } else {
924                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_light);
925             }
926         }
927     }
928
929     private void scrollBookmarks(int selectedBookmarkPosition) {
930         // Get the first and last visible bookmark positions.
931         int firstVisibleBookmarkPosition = bookmarksListView.getFirstVisiblePosition();
932         int lastVisibleBookmarkPosition = bookmarksListView.getLastVisiblePosition();
933
934         // Calculate the number of bookmarks per screen.
935         int numberOfBookmarksPerScreen = lastVisibleBookmarkPosition - firstVisibleBookmarkPosition;
936
937         // Scroll with the moved bookmark if necessary.
938         if (selectedBookmarkPosition <= firstVisibleBookmarkPosition) {  // The selected bookmark position is at or above the top of the screen.
939             // Scroll to the selected bookmark position.
940             bookmarksListView.setSelection(selectedBookmarkPosition);
941         } else if (selectedBookmarkPosition >= (lastVisibleBookmarkPosition - 1)) {  // The selected bookmark is at or below the bottom of the screen.  The `-1` handles partial bookmarks displayed at the bottom of the `ListView`.
942             // Scroll to display the selected bookmark at the bottom of the screen.  `+1` assured that the entire bookmark will be displayed in situations where only a partial bookmark fits at the bottom of the `ListView`.
943             bookmarksListView.setSelection(selectedBookmarkPosition - numberOfBookmarksPerScreen + 1);
944         }
945     }
946
947     private void loadFolder() {
948         // Update `bookmarksCursor` with the contents of the bookmarks database for the current folder.
949         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
950
951         // Setup a `CursorAdapter`.  `this` specifies the `Context`.  `false` disables `autoRequery`.
952         bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
953             @Override
954             public View newView(Context context, Cursor cursor, ViewGroup parent) {
955                 // Inflate the individual item layout.  `false` does not attach it to the root.
956                 return getLayoutInflater().inflate(R.layout.bookmarks_activity_item_linearlayout, parent, false);
957             }
958
959             @Override
960             public void bindView(View view, Context context, Cursor cursor) {
961                 // Get handles for the views.
962                 ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
963                 TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
964
965                 // Get the favorite icon byte array from the `Cursor`.
966                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
967
968                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
969                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
970
971                 // Display the bitmap in `bookmarkFavoriteIcon`.
972                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
973
974                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
975                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
976                 bookmarkNameTextView.setText(bookmarkNameString);
977
978                 // Make the font bold for folders.
979                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
980                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
981                 } else {  // Reset the font to default for normal bookmarks.
982                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
983                 }
984             }
985         };
986
987         // Populate the `ListView` with the adapter.
988         bookmarksListView.setAdapter(bookmarksCursorAdapter);
989
990         // Set the `AppBar` title.
991         if (currentFolder.isEmpty()) {
992             appBar.setTitle(R.string.bookmarks);
993         } else {
994             appBar.setTitle(currentFolder);
995         }
996     }
997 }