app/src/main/java/com/stoutner/privacybrowser/fragments/SettingsFragment.java

   1 /*
   2  * Copyright © 2016-2019 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.fragments;
  21
  22 import android.annotation.SuppressLint;
  23 import android.content.Context;
  24 import android.content.Intent;
  25 import android.content.SharedPreferences;
  26 import android.os.Build;
  27 import android.os.Bundle;
  28 import android.os.Handler;
  29 import android.preference.Preference;
  30 import android.preference.PreferenceCategory;
  31 import android.preference.PreferenceFragment;
  32 import android.view.LayoutInflater;
  33 import android.view.View;
  34 import android.webkit.WebView;
  35 import android.widget.ArrayAdapter;
  36
  37 import com.stoutner.privacybrowser.R;
  38 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
  39
  40 public class SettingsFragment extends PreferenceFragment {
  41     private SharedPreferences.OnSharedPreferenceChangeListener preferencesListener;
  42     private SharedPreferences savedPreferences;
  43
  44     @Override
  45     public void onCreate(Bundle savedInstanceState) {
  46         // Run the default commands.
  47         super.onCreate(savedInstanceState);
  48
  49         // Load the preferences from the XML file.
  50         addPreferencesFromResource(R.xml.preferences);
  51
  52         // Get a handle for the context.
  53         Context context = getActivity().getApplicationContext();
  54
  55         // Initialize savedPreferences.
  56         savedPreferences = getPreferenceScreen().getSharedPreferences();
  57
  58         // Get handles for the preferences.
  59         Preference javaScriptPreference = findPreference("javascript");
  60         Preference firstPartyCookiesPreference = findPreference("first_party_cookies");
  61         Preference thirdPartyCookiesPreference = findPreference("third_party_cookies");
  62         Preference domStoragePreference = findPreference("dom_storage");
  63         Preference saveFormDataPreference = findPreference("save_form_data");  // The form data preference can be removed once the minimum API >= 26.
  64         Preference userAgentPreference = findPreference("user_agent");
  65         Preference customUserAgentPreference = findPreference("custom_user_agent");
  66         Preference incognitoModePreference = findPreference("incognito_mode");
  67         Preference doNotTrackPreference = findPreference("do_not_track");
  68         Preference allowScreenshotsPreference = findPreference("allow_screenshots");
  69         Preference easyListPreference = findPreference("easylist");
  70         Preference easyPrivacyPreference = findPreference("easyprivacy");
  71         Preference fanboyAnnoyanceListPreference = findPreference("fanboys_annoyance_list");
  72         Preference fanboySocialBlockingListPreference = findPreference("fanboys_social_blocking_list");
  73         Preference ultraPrivacyPreference = findPreference("ultraprivacy");
  74         Preference blockAllThirdPartyRequestsPreference = findPreference("block_all_third_party_requests");
  75         Preference proxyThroughOrbotPreference = findPreference("proxy_through_orbot");
  76         Preference torHomepagePreference = findPreference("tor_homepage");
  77         Preference torSearchPreference = findPreference("tor_search");
  78         Preference torSearchCustomURLPreference = findPreference("tor_search_custom_url");
  79         Preference searchPreference = findPreference("search");
  80         Preference searchCustomURLPreference = findPreference("search_custom_url");
  81         Preference fullScreenBrowsingModePreference = findPreference("full_screen_browsing_mode");
  82         Preference hideAppBarPreference = findPreference("hide_app_bar");
  83         Preference clearEverythingPreference = findPreference("clear_everything");
  84         Preference clearCookiesPreference = findPreference("clear_cookies");
  85         Preference clearDomStoragePreference = findPreference("clear_dom_storage");
  86         Preference clearFormDataPreference = findPreference("clear_form_data");  // The clear form data preference can be removed once the minimum API >= 26.
  87         Preference clearCachePreference = findPreference("clear_cache");
  88         Preference homepagePreference = findPreference("homepage");
  89         Preference fontSizePreference = findPreference("font_size");
  90         Preference openIntentsInNewTabPreference = findPreference("open_intents_in_new_tab");
  91         Preference swipeToRefreshPreference = findPreference("swipe_to_refresh");
  92         Preference scrollAppBarPreference = findPreference("scroll_app_bar");
  93         Preference displayAdditionalAppBarIconsPreference = findPreference("display_additional_app_bar_icons");
  94         Preference downloadWithExternalAppPreference = findPreference("download_with_external_app");
  95         Preference darkThemePreference = findPreference("dark_theme");
  96         Preference nightModePreference = findPreference("night_mode");
  97         Preference displayWebpageImagesPreference = findPreference("display_webpage_images");
  98
  99         // Set dependencies.
 100         torHomepagePreference.setDependency("proxy_through_orbot");
 101         torSearchPreference.setDependency("proxy_through_orbot");
 102         hideAppBarPreference.setDependency("full_screen_browsing_mode");
 103
 104         // Get strings from the preferences.
 105         String torSearchString = savedPreferences.getString("tor_search", getString(R.string.tor_search_default_value));
 106         String searchString = savedPreferences.getString("search", getString(R.string.search_default_value));
 107
 108         // Get booleans that are used in multiple places from the preferences.
 109         boolean javaScriptEnabled = savedPreferences.getBoolean("javascript", false);
 110         boolean firstPartyCookiesEnabled = savedPreferences.getBoolean("first_party_cookies", false);
 111         boolean thirdPartyCookiesEnabled = savedPreferences.getBoolean("third_party_cookies", false);
 112         boolean fanboyAnnoyanceListEnabled = savedPreferences.getBoolean("fanboys_annoyance_list", true);
 113         boolean fanboySocialBlockingEnabled = savedPreferences.getBoolean("fanboys_social_blocking_list", true);
 114         boolean proxyThroughOrbot = savedPreferences.getBoolean("proxy_through_orbot", false);
 115         boolean fullScreenBrowsingMode = savedPreferences.getBoolean("full_screen_browsing_mode", false);
 116         boolean clearEverything = savedPreferences.getBoolean("clear_everything", true);
 117         boolean darkTheme = savedPreferences.getBoolean("dark_theme", false);
 118         boolean nightMode = savedPreferences.getBoolean("night_mode", false);
 119
 120         // Only enable the third-party cookies preference if first-party cookies are enabled and API >= 21.
 121         thirdPartyCookiesPreference.setEnabled(firstPartyCookiesEnabled && (Build.VERSION.SDK_INT >= 21));
 122
 123         // Only enable the DOM storage preference if either JavaScript or Night Mode is enabled.
 124         domStoragePreference.setEnabled(javaScriptEnabled || nightMode);
 125
 126         // Remove the form data preferences if the API is >= 26 as they no longer do anything.
 127         if (Build.VERSION.SDK_INT >= 26) {
 128             // Get the categories.
 129             PreferenceCategory privacyCategory = (PreferenceCategory) findPreference("privacy");
 130             PreferenceCategory clearAndExitCategory = (PreferenceCategory) findPreference("clear_and_exit");
 131
 132             // Remove the form data preferences.
 133             privacyCategory.removePreference(saveFormDataPreference);
 134             clearAndExitCategory.removePreference(clearFormDataPreference);
 135         }
 136
 137         // Only enable Fanboy's social blocking list preference if Fanboy's annoyance list is disabled.
 138         fanboySocialBlockingListPreference.setEnabled(!fanboyAnnoyanceListEnabled);
 139
 140         // Inflate a WebView to get the default user agent.
 141         LayoutInflater inflater = getActivity().getLayoutInflater();
 142         // `@SuppressLint("InflateParams")` removes the warning about using `null` as the `ViewGroup`, which in this case makes sense because the `bare_webview` will not be displayed.
 143         @SuppressLint("InflateParams") View bareWebViewLayout = inflater.inflate(R.layout.bare_webview, null, false);
 144         WebView bareWebView = bareWebViewLayout.findViewById(R.id.bare_webview);
 145
 146         // Get the user agent arrays.
 147         ArrayAdapter<CharSequence> userAgentNamesArray = ArrayAdapter.createFromResource(context, R.array.user_agent_names, R.layout.spinner_item);
 148         String[] translatedUserAgentNamesArray = getResources().getStringArray(R.array.translated_user_agent_names);
 149         String[] userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
 150
 151         // Get the current user agent name from the preference.
 152         String userAgentName = savedPreferences.getString("user_agent", getString(R.string.user_agent_default_value));
 153
 154         // Get the array position of the user agent name.
 155         int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
 156
 157         // Populate the user agent summary.
 158         switch (userAgentArrayPosition) {
 159             case MainWebViewActivity.UNRECOGNIZED_USER_AGENT:  // The user agent name is not on the canonical list.
 160                 // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.  Use the current user agent entry name as the summary.
 161                 userAgentPreference.setSummary(userAgentName);
 162                 break;
 163
 164             case MainWebViewActivity.SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
 165                 // Get the user agent text from the webview (which changes based on the version of Android and WebView installed).
 166                 userAgentPreference.setSummary(translatedUserAgentNamesArray[userAgentArrayPosition] + ":\n" + bareWebView.getSettings().getUserAgentString());
 167                 break;
 168
 169             case MainWebViewActivity.SETTINGS_CUSTOM_USER_AGENT:
 170                 // Set the summary text.
 171                 userAgentPreference.setSummary(R.string.custom_user_agent);
 172                 break;
 173
 174             default:
 175                 // Get the user agent summary from the user agent data array.
 176                 userAgentPreference.setSummary(translatedUserAgentNamesArray[userAgentArrayPosition] + ":\n" + userAgentDataArray[userAgentArrayPosition]);
 177         }
 178
 179         // Set the summary text for the custom user agent preference and enable it if user agent preference is set to custom.
 180         customUserAgentPreference.setSummary(savedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
 181         customUserAgentPreference.setEnabled(userAgentPreference.getSummary().equals(getString(R.string.custom_user_agent)));
 182
 183
 184         // Set the Tor homepage URL as the summary text for the `tor_homepage` preference when the preference screen is loaded.  The default is Searx: `http://ulrn6sryqaifefld.onion/`.
 185         torHomepagePreference.setSummary(savedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
 186
 187
 188         // Set the Tor search URL as the summary text for the Tor preference when the preference screen is loaded.
 189         if (torSearchString.equals("Custom URL")) {
 190             // Use R.string.custom_url, which will be translated, instead of the array value, which will not.
 191             torSearchPreference.setSummary(R.string.custom_url);
 192         } else {
 193             // Set the array value as the summary text.
 194             torSearchPreference.setSummary(torSearchString);
 195         }
 196
 197         // Set the summary text for `tor_search_custom_url`.  The default is `""`.
 198         torSearchCustomURLPreference.setSummary(savedPreferences.getString("tor_search_custom_url", getString(R.string.tor_search_custom_url_default_value)));
 199
 200         // Enable the Tor custom URL search options only if proxying through Orbot and the search is set to `Custom URL`.
 201         torSearchCustomURLPreference.setEnabled(proxyThroughOrbot && torSearchString.equals("Custom URL"));
 202
 203
 204         // Set the search URL as the summary text for the search preference when the preference screen is loaded.
 205         if (searchString.equals("Custom URL")) {
 206             // Use R.string.custom_url, which will be translated, instead of the array value, which will not.
 207             searchPreference.setSummary(R.string.custom_url);
 208         } else {
 209             // Set the array value as the summary text.
 210             searchPreference.setSummary(searchString);
 211         }
 212
 213         // Set the summary text for `search_custom_url` (the default is `""`) and enable it if `search` is set to `Custom URL`.
 214         searchCustomURLPreference.setSummary(savedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value)));
 215         searchCustomURLPreference.setEnabled(searchString.equals("Custom URL"));
 216
 217         // Set the status of the Clear and Exit preferences.
 218         clearCookiesPreference.setEnabled(!clearEverything);
 219         clearDomStoragePreference.setEnabled(!clearEverything);
 220         clearFormDataPreference.setEnabled(!clearEverything);  // The form data line can be removed once the minimum API is >= 26.
 221         clearCachePreference.setEnabled(!clearEverything);
 222
 223         // Set the homepage URL as the summary text for the homepage preference.
 224         homepagePreference.setSummary(savedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
 225
 226         // Set the font size as the summary text for the preference.
 227         fontSizePreference.setSummary(savedPreferences.getString("font_size", getString(R.string.font_size_default_value)) + "%%");
 228
 229         // Disable the JavaScript preference if Night Mode is enabled.  JavaScript will be enabled for all web pages.
 230         javaScriptPreference.setEnabled(!nightMode);
 231
 232         // Set the JavaScript icon.
 233         if (javaScriptEnabled || nightMode) {
 234             javaScriptPreference.setIcon(R.drawable.javascript_enabled);
 235         } else {
 236             javaScriptPreference.setIcon(R.drawable.privacy_mode);
 237         }
 238
 239         // Set the first-party cookies icon.
 240         if (firstPartyCookiesEnabled) {
 241             firstPartyCookiesPreference.setIcon(R.drawable.cookies_enabled);
 242         } else {
 243             if (darkTheme) {
 244                 firstPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
 245             } else {
 246                 firstPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
 247             }
 248         }
 249
 250         // Set the third party cookies icon.
 251         if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
 252             if (thirdPartyCookiesEnabled) {
 253                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_warning);
 254             } else {
 255                 if (darkTheme) {
 256                     thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
 257                 } else {
 258                     thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
 259                 }
 260             }
 261         } else {
 262             if (darkTheme) {
 263                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_dark);
 264             } else {
 265                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_light);
 266             }
 267         }
 268
 269         // Set the DOM storage icon.
 270         if (javaScriptEnabled || nightMode) {  // The preference is enabled.
 271             if (savedPreferences.getBoolean("dom_storage", false)) {  // DOM storage is enabled.
 272                 domStoragePreference.setIcon(R.drawable.dom_storage_enabled);
 273             } else {  // DOM storage is disabled.
 274                 if (darkTheme) {
 275                     domStoragePreference.setIcon(R.drawable.dom_storage_disabled_dark);
 276                 } else {
 277                     domStoragePreference.setIcon(R.drawable.dom_storage_disabled_light);
 278                 }
 279             }
 280         } else {  // The preference is disabled.  The icon should be ghosted.
 281             if (darkTheme) {
 282                 domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_dark);
 283             } else {
 284                 domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_light);
 285             }
 286         }
 287
 288         // Set the save form data icon if API < 26.  Save form data has no effect on API >= 26.
 289         if (Build.VERSION.SDK_INT < 26) {
 290             if (savedPreferences.getBoolean("save_form_data", false)) {
 291                 saveFormDataPreference.setIcon(R.drawable.form_data_enabled);
 292             } else {
 293                 if (darkTheme) {
 294                     saveFormDataPreference.setIcon(R.drawable.form_data_disabled_dark);
 295                 } else {
 296                     saveFormDataPreference.setIcon(R.drawable.form_data_disabled_light);
 297                 }
 298             }
 299         }
 300
 301         // Set the custom user agent icon.
 302         if (customUserAgentPreference.isEnabled()) {
 303             if (darkTheme) {
 304                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_enabled_dark);
 305             } else {
 306                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_enabled_light);
 307             }
 308         } else {
 309             if (darkTheme) {
 310                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_dark);
 311             } else {
 312                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_light);
 313             }
 314         }
 315
 316         // Set the incognito mode icon.
 317         if (savedPreferences.getBoolean("incognito_mode", false)) {
 318             if (darkTheme) {
 319                 incognitoModePreference.setIcon(R.drawable.incognito_mode_enabled_dark);
 320             } else {
 321                 incognitoModePreference.setIcon(R.drawable.incognito_mode_enabled_light);
 322             }
 323         } else {
 324             if (darkTheme) {
 325                 incognitoModePreference.setIcon(R.drawable.incognito_mode_disabled_dark);
 326             } else {
 327                 incognitoModePreference.setIcon(R.drawable.incognito_mode_disabled_light);
 328             }
 329         }
 330
 331         // Set the Do Not Track icon.
 332         if (savedPreferences.getBoolean("do_not_track", false)) {
 333             if (darkTheme) {
 334                 doNotTrackPreference.setIcon(R.drawable.block_tracking_enabled_dark);
 335             } else {
 336                 doNotTrackPreference.setIcon(R.drawable.block_tracking_enabled_light);
 337             }
 338         } else {
 339             if (darkTheme) {
 340                 doNotTrackPreference.setIcon(R.drawable.block_tracking_disabled_dark);
 341             } else {
 342                 doNotTrackPreference.setIcon(R.drawable.block_tracking_disabled_light);
 343             }
 344         }
 345
 346         // Set the allow screenshots icon.
 347         if (savedPreferences.getBoolean("allow_screenshots", false)) {
 348             if (darkTheme) {
 349                 allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_enabled_dark);
 350             } else {
 351                 allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_enabled_light);
 352             }
 353         } else {
 354             if (darkTheme) {
 355                 allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_disabled_dark);
 356             } else {
 357                 allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_disabled_light);
 358             }
 359         }
 360
 361         // Set the EasyList icon.
 362         if (savedPreferences.getBoolean("easylist", true)) {
 363             if (darkTheme) {
 364                 easyListPreference.setIcon(R.drawable.block_ads_enabled_dark);
 365             } else {
 366                 easyListPreference.setIcon(R.drawable.block_ads_enabled_light);
 367             }
 368         } else {
 369             if (darkTheme) {
 370                 easyListPreference.setIcon(R.drawable.block_ads_disabled_dark);
 371             } else {
 372                 easyListPreference.setIcon(R.drawable.block_ads_disabled_light);
 373             }
 374         }
 375
 376         // Set the EasyPrivacy icon.
 377         if (savedPreferences.getBoolean("easyprivacy", true)) {
 378             if (darkTheme) {
 379                 easyPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_dark);
 380             } else {
 381                 easyPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_light);
 382             }
 383         } else {
 384             if (darkTheme) {
 385                 easyPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_dark);
 386             } else {
 387                 easyPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_light);
 388             }
 389         }
 390
 391         // Set the Fanboy lists icons.
 392         if (fanboyAnnoyanceListEnabled) {
 393             if (darkTheme) {
 394                 // Set the Fanboy annoyance list icon.
 395                 fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_enabled_dark);
 396
 397                 // Set the Fanboy social blocking list icon.
 398                 fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_ghosted_dark);
 399             } else {
 400                 // Set the Fanboy annoyance list icon.
 401                 fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_enabled_light);
 402
 403                 // Set the Fanboy social blocking list icon.
 404                 fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_ghosted_light);
 405             }
 406         } else {
 407             if (darkTheme) {
 408                 // Set the Fanboy annoyance list icon.
 409                 fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_disabled_dark);
 410
 411                 // Set the Fanboy social blocking list icon.
 412                 if (fanboySocialBlockingEnabled) {
 413                     fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_dark);
 414                 } else {
 415                     fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_dark);
 416                 }
 417             } else {
 418                 // Set the Fanboy annoyance list icon.
 419                 fanboyAnnoyanceListPreference.setIcon(R.drawable.block_ads_disabled_light);
 420
 421                 // Set the Fanboy social blocking list icon.
 422                 if (fanboySocialBlockingEnabled) {
 423                     fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_light);
 424                 } else {
 425                     fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_light);
 426                 }
 427             }
 428         }
 429
 430         // Set the UltraPrivacy icon.
 431         if (savedPreferences.getBoolean("ultraprivacy", true)) {
 432             if (darkTheme) {
 433                 ultraPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_dark);
 434             } else {
 435                 ultraPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_light);
 436             }
 437         } else {
 438             if (darkTheme) {
 439                 ultraPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_dark);
 440             } else {
 441                 ultraPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_light);
 442             }
 443         }
 444
 445         // Set the block all third-party requests icon.
 446         if (savedPreferences.getBoolean("block_all_third_party_requests", false)) {
 447             if (darkTheme) {
 448                 blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_enabled_dark);
 449             } else {
 450                 blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_enabled_light);
 451             }
 452         } else {
 453             if (darkTheme) {
 454                 blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_disabled_dark);
 455             } else {
 456                 blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_disabled_light);
 457             }
 458         }
 459
 460         // Set the Tor icons according to the theme.
 461         if (proxyThroughOrbot) {  // Proxying is enabled.
 462             if (darkTheme) {
 463                 proxyThroughOrbotPreference.setIcon(R.drawable.orbot_enabled_dark);
 464                 torHomepagePreference.setIcon(R.drawable.home_enabled_dark);
 465                 torSearchPreference.setIcon(R.drawable.search_enabled_dark);
 466
 467                 // Set the custom search icon.
 468                 if (torSearchCustomURLPreference.isEnabled()) {
 469                     torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
 470                 } else {
 471                     torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
 472                 }
 473             } else {
 474                 proxyThroughOrbotPreference.setIcon(R.drawable.orbot_enabled_light);
 475                 torHomepagePreference.setIcon(R.drawable.home_enabled_light);
 476                 torSearchPreference.setIcon(R.drawable.search_enabled_light);
 477
 478                 // Set the custom search icon.
 479                 if (torSearchCustomURLPreference.isEnabled()) {
 480                     torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
 481                 } else {
 482                     torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
 483                 }
 484             }
 485         } else {  // Proxying is disabled.
 486             if (darkTheme) {
 487                 proxyThroughOrbotPreference.setIcon(R.drawable.orbot_disabled_dark);
 488                 torHomepagePreference.setIcon(R.drawable.home_ghosted_dark);
 489                 torSearchPreference.setIcon(R.drawable.search_ghosted_dark);
 490                 torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
 491             } else {
 492                 proxyThroughOrbotPreference.setIcon(R.drawable.orbot_disabled_light);
 493                 torHomepagePreference.setIcon(R.drawable.home_ghosted_light);
 494                 torSearchPreference.setIcon(R.drawable.search_ghosted_light);
 495                 torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
 496             }
 497         }
 498
 499         // Set the search custom URL icon.
 500         if (searchCustomURLPreference.isEnabled()) {
 501             if (darkTheme) {
 502                 searchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
 503             } else {
 504                 searchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
 505             }
 506         } else {
 507             if (darkTheme) {
 508                 searchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
 509             } else {
 510                 searchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
 511             }
 512         }
 513
 514         // Set the full screen browsing mode icons.
 515         if (fullScreenBrowsingMode) {  // Full screen browsing mode is enabled.
 516             // Set the `fullScreenBrowsingModePreference` icon according to the theme.
 517             if (darkTheme) {
 518                 fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_dark);
 519             } else {
 520                 fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_light);
 521             }
 522
 523             // Set the hide app bar icon.
 524             if (savedPreferences.getBoolean("hide_app_bar", true)) {  // Hide app bar is enabled.
 525                 // Set the icon according to the theme.
 526                 if (darkTheme) {
 527                     hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
 528                 } else {
 529                     hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
 530                 }
 531             } else {  // Hide app bar is disabled.
 532                 // Set the icon according to the theme.
 533                 if (darkTheme) {
 534                     hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
 535                 } else {
 536                     hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
 537                 }
 538             }
 539         } else {  // Full screen browsing mode is disabled.
 540             // Set the icons according to the theme.
 541             if (darkTheme) {
 542                 fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_dark);
 543                 hideAppBarPreference.setIcon(R.drawable.app_bar_ghosted_dark);
 544             } else {
 545                 fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_light);
 546                 hideAppBarPreference.setIcon(R.drawable.app_bar_ghosted_light);
 547             }
 548         }
 549
 550         // Set the clear everything preference icon.
 551         if (clearEverything) {
 552             if (darkTheme) {
 553                 clearEverythingPreference.setIcon(R.drawable.clear_everything_enabled_dark);
 554             } else {
 555                 clearEverythingPreference.setIcon(R.drawable.clear_everything_enabled_light);
 556             }
 557         } else {
 558             clearEverythingPreference.setIcon(R.drawable.clear_everything_disabled);
 559         }
 560
 561         // Set the clear cookies preference icon.
 562         if (clearEverything || savedPreferences.getBoolean("clear_cookies", true)) {
 563             if (darkTheme) {
 564                 clearCookiesPreference.setIcon(R.drawable.cookies_cleared_dark);
 565             } else {
 566                 clearCookiesPreference.setIcon(R.drawable.cookies_cleared_light);
 567             }
 568         } else {
 569             clearCookiesPreference.setIcon(R.drawable.cookies_warning);
 570         }
 571
 572         // Set the clear DOM storage preference icon.
 573         if (clearEverything || savedPreferences.getBoolean("clear_dom_storage", true)) {
 574             if (darkTheme) {
 575                 clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_dark);
 576             } else {
 577                 clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_light);
 578             }
 579         } else {
 580             clearDomStoragePreference.setIcon(R.drawable.dom_storage_warning);
 581         }
 582
 583         // Set the clear form data preference icon if the API < 26.  It has no effect on newer versions of Android.
 584         if (Build.VERSION.SDK_INT < 26) {
 585             if (clearEverything || savedPreferences.getBoolean("clear_form_data", true)) {
 586                 if (darkTheme) {
 587                     clearFormDataPreference.setIcon(R.drawable.form_data_cleared_dark);
 588                 } else {
 589                     clearFormDataPreference.setIcon(R.drawable.form_data_cleared_light);
 590                 }
 591             } else {
 592                 clearFormDataPreference.setIcon(R.drawable.form_data_warning);
 593             }
 594         }
 595
 596         // Set the clear cache preference icon.
 597         if (clearEverything || savedPreferences.getBoolean("clear_cache", true)) {
 598             if (darkTheme) {
 599                 clearCachePreference.setIcon(R.drawable.cache_cleared_dark);
 600             } else {
 601                 clearCachePreference.setIcon(R.drawable.cache_cleared_light);
 602             }
 603         } else {
 604             clearCachePreference.setIcon(R.drawable.cache_warning);
 605         }
 606
 607         // Set the open intents in new tab preference icon.
 608         if (savedPreferences.getBoolean("open_intents_in_new_tab", true)) {
 609             if (darkTheme) {
 610                 openIntentsInNewTabPreference.setIcon(R.drawable.tab_enabled_dark);
 611             } else {
 612                 openIntentsInNewTabPreference.setIcon(R.drawable.tab_enabled_light);
 613             }
 614         } else {
 615             if (darkTheme) {
 616                 openIntentsInNewTabPreference.setIcon(R.drawable.tab_disabled_dark);
 617             } else {
 618                 openIntentsInNewTabPreference.setIcon(R.drawable.tab_disabled_light);
 619             }
 620         }
 621
 622         // Set the swipe to refresh preference icon.
 623         if (savedPreferences.getBoolean("swipe_to_refresh", true)) {
 624             if (darkTheme) {
 625                 swipeToRefreshPreference.setIcon(R.drawable.refresh_enabled_dark);
 626             } else {
 627                 swipeToRefreshPreference.setIcon(R.drawable.refresh_enabled_light);
 628             }
 629         } else {
 630             if (darkTheme) {
 631                 swipeToRefreshPreference.setIcon(R.drawable.refresh_disabled_dark);
 632             } else {
 633                 swipeToRefreshPreference.setIcon(R.drawable.refresh_disabled_light);
 634             }
 635         }
 636
 637         // Set the scroll app bar preference icon.
 638         if (savedPreferences.getBoolean("scroll_app_bar", true)) {
 639             if (darkTheme) {
 640                 scrollAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
 641             } else {
 642                 scrollAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
 643             }
 644         } else {
 645             if (darkTheme) {
 646                 scrollAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
 647             } else {
 648                 scrollAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
 649             }
 650         }
 651
 652         // Set the display additional app bar icons preference icon.
 653         if (savedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
 654             if (darkTheme) {
 655                 displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_enabled_dark);
 656             } else {
 657                 displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_enabled_light);
 658             }
 659         } else {
 660             if (darkTheme) {
 661                 displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_disabled_dark);
 662             } else {
 663                 displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_disabled_light);
 664             }
 665         }
 666
 667         // Set the download with external app preference icon.
 668         if (savedPreferences.getBoolean("download_with_external_app", false)) {
 669             if (darkTheme) {
 670                 downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_enabled_dark);
 671             } else {
 672                 downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_enabled_light);
 673             }
 674         } else {
 675             if (darkTheme) {
 676                 downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_disabled_dark);
 677             } else {
 678                 downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_disabled_light);
 679             }
 680         }
 681
 682         // Set the dark theme preference icon.
 683         if (savedPreferences.getBoolean("dark_theme", false)) {
 684             darkThemePreference.setIcon(R.drawable.theme_dark);
 685         } else {
 686             darkThemePreference.setIcon(R.drawable.theme_light);
 687         }
 688
 689         // Set the night mode preference icon.
 690         if (nightMode) {
 691             if (darkTheme) {
 692                 nightModePreference.setIcon(R.drawable.night_mode_enabled_dark);
 693             } else {
 694                 nightModePreference.setIcon(R.drawable.night_mode_enabled_light);
 695             }
 696         } else {
 697             if (darkTheme) {
 698                 nightModePreference.setIcon(R.drawable.night_mode_disabled_dark);
 699             } else {
 700                 nightModePreference.setIcon(R.drawable.night_mode_disabled_light);
 701             }
 702         }
 703
 704         // Set the display webpage images preference icon.
 705         if (savedPreferences.getBoolean("display_webpage_images", true)) {
 706             if (darkTheme) {
 707                 displayWebpageImagesPreference.setIcon(R.drawable.images_enabled_dark);
 708             } else {
 709                 displayWebpageImagesPreference.setIcon(R.drawable.images_enabled_light);
 710             }
 711         } else {
 712             if (darkTheme) {
 713                 displayWebpageImagesPreference.setIcon(R.drawable.images_disabled_dark);
 714             } else {
 715                 displayWebpageImagesPreference.setIcon(R.drawable.images_disabled_light);
 716             }
 717         }
 718
 719
 720         // Listen for preference changes.
 721         preferencesListener = (SharedPreferences sharedPreferences, String key) -> {
 722             switch (key) {
 723                 case "javascript":
 724                     // Update the icons and the DOM storage preference status.
 725                     if (sharedPreferences.getBoolean("javascript", false)) {  // The JavaScript preference is enabled.
 726                         // Update the icon for the JavaScript preference.
 727                         javaScriptPreference.setIcon(R.drawable.javascript_enabled);
 728
 729                         // Update the status of the DOM storage preference.
 730                         domStoragePreference.setEnabled(true);
 731
 732                         // Update the icon for the DOM storage preference.
 733                         if (sharedPreferences.getBoolean("dom_storage", false)) {
 734                             domStoragePreference.setIcon(R.drawable.dom_storage_enabled);
 735                         } else {
 736                             if (darkTheme) {
 737                                 domStoragePreference.setIcon(R.drawable.dom_storage_disabled_dark);
 738                             } else {
 739                                 domStoragePreference.setIcon(R.drawable.dom_storage_disabled_light);
 740                             }
 741                         }
 742                     } else {  // The JavaScript preference is disabled.
 743                         // Update the icon for the JavaScript preference.
 744                         javaScriptPreference.setIcon(R.drawable.privacy_mode);
 745
 746                         // Update the status of the DOM storage preference.
 747                         domStoragePreference.setEnabled(false);
 748
 749                         // Set the icon for DOM storage preference to be ghosted.
 750                         if (darkTheme) {
 751                             domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_dark);
 752                         } else {
 753                             domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_light);
 754                         }
 755                     }
 756                     break;
 757
 758                 case "first_party_cookies":
 759                     // Update the icons for `first_party_cookies` and `third_party_cookies`.
 760                     if (sharedPreferences.getBoolean("first_party_cookies", false)) {
 761                         // Set the icon for `first_party_cookies`.
 762                         firstPartyCookiesPreference.setIcon(R.drawable.cookies_enabled);
 763
 764                         // Update the icon for `third_party_cookies`.
 765                         if (Build.VERSION.SDK_INT >= 21) {
 766                             if (sharedPreferences.getBoolean("third_party_cookies", false)) {
 767                                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_warning);
 768                             } else {
 769                                 if (darkTheme) {
 770                                     thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
 771                                 } else {
 772                                     thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
 773                                 }
 774                             }
 775                         } else {
 776                             if (darkTheme) {
 777                                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_dark);
 778                             } else {
 779                                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_light);
 780                             }
 781                         }
 782                     } else {  // `first_party_cookies` is `false`.
 783                         // Update the icon for `first_party_cookies`.
 784                         if (darkTheme) {
 785                             firstPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
 786                         } else {
 787                             firstPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
 788                         }
 789
 790                         // Set the icon for `third_party_cookies` to be ghosted.
 791                         if (darkTheme) {
 792                             thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_dark);
 793                         } else {
 794                             thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_light);
 795                         }
 796                     }
 797
 798                     // Enable `third_party_cookies` if `first_party_cookies` is `true` and API >= 21.
 799                     thirdPartyCookiesPreference.setEnabled(sharedPreferences.getBoolean("first_party_cookies", false) && (Build.VERSION.SDK_INT >= 21));
 800                     break;
 801
 802                 case "third_party_cookies":
 803                     // Update the icon.
 804                     if (sharedPreferences.getBoolean("third_party_cookies", false)) {
 805                         thirdPartyCookiesPreference.setIcon(R.drawable.cookies_warning);
 806                     } else {
 807                         if (darkTheme) {
 808                             thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
 809                         } else {
 810                             thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
 811                         }
 812                     }
 813                     break;
 814
 815                 case "dom_storage":
 816                     // Update the icon.
 817                     if (sharedPreferences.getBoolean("dom_storage", false)) {
 818                         domStoragePreference.setIcon(R.drawable.dom_storage_enabled);
 819                     } else {
 820                         if (darkTheme) {
 821                             domStoragePreference.setIcon(R.drawable.dom_storage_disabled_dark);
 822                         } else {
 823                             domStoragePreference.setIcon(R.drawable.dom_storage_disabled_light);
 824                         }
 825                     }
 826                     break;
 827
 828                 // Save form data can be removed once the minimum API >= 26.
 829                 case "save_form_data":
 830                     // Update the icon.
 831                     if (sharedPreferences.getBoolean("save_form_data", false)) {
 832                         saveFormDataPreference.setIcon(R.drawable.form_data_enabled);
 833                     } else {
 834                         if (darkTheme) {
 835                             saveFormDataPreference.setIcon(R.drawable.form_data_disabled_dark);
 836                         } else {
 837                             saveFormDataPreference.setIcon(R.drawable.form_data_disabled_light);
 838                         }
 839                     }
 840                     break;
 841
 842                 case "user_agent":
 843                     // Get the new user agent name.
 844                     String newUserAgentName = sharedPreferences.getString("user_agent", getString(R.string.user_agent_default_value));
 845
 846                     // Get the array position for the new user agent name.
 847                     int newUserAgentArrayPosition = userAgentNamesArray.getPosition(newUserAgentName);
 848
 849                     // Get the translated new user agent name.
 850                     String translatedNewUserAgentName = translatedUserAgentNamesArray[newUserAgentArrayPosition];
 851
 852                     // Populate the user agent summary.
 853                     switch (newUserAgentArrayPosition) {
 854                         case MainWebViewActivity.SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
 855                             // Get the user agent text from the webview (which changes based on the version of Android and WebView installed).
 856                             userAgentPreference.setSummary(translatedNewUserAgentName + ":\n" + bareWebView.getSettings().getUserAgentString());
 857
 858                             // Disable the custom user agent preference.
 859                             customUserAgentPreference.setEnabled(false);
 860
 861                             // Set the custom user agent preference icon according to the theme.
 862                             if (darkTheme) {
 863                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_dark);
 864                             } else {
 865                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_light);
 866                             }
 867                             break;
 868
 869                         case MainWebViewActivity.SETTINGS_CUSTOM_USER_AGENT:
 870                             // Set the summary text.
 871                             userAgentPreference.setSummary(R.string.custom_user_agent);
 872
 873                             // Enable the custom user agent preference.
 874                             customUserAgentPreference.setEnabled(true);
 875
 876                             // Set the custom user agent preference icon according to the theme.
 877                             if (darkTheme) {
 878                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_enabled_dark);
 879                             } else {
 880                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_enabled_light);
 881                             }
 882                             break;
 883
 884                         default:
 885                             // Get the user agent summary from the user agent data array.
 886                             userAgentPreference.setSummary(translatedNewUserAgentName + ":\n" + userAgentDataArray[newUserAgentArrayPosition]);
 887
 888                             // Disable the custom user agent preference.
 889                             customUserAgentPreference.setEnabled(false);
 890
 891                             // Set the custom user agent preference icon according to the theme.
 892                             if (darkTheme) {
 893                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_dark);
 894                             } else {
 895                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_light);
 896                             }
 897                     }
 898                     break;
 899
 900                 case "custom_user_agent":
 901                     // Set the new custom user agent as the summary text for the preference.
 902                     customUserAgentPreference.setSummary(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
 903                     break;
 904
 905                 case "incognito_mode":
 906                     // Update the icon.
 907                     if (sharedPreferences.getBoolean("incognito_mode", false)) {
 908                         if (darkTheme) {
 909                             incognitoModePreference.setIcon(R.drawable.incognito_mode_enabled_dark);
 910                         } else {
 911                             incognitoModePreference.setIcon(R.drawable.incognito_mode_enabled_light);
 912                         }
 913                     } else {
 914                         if (darkTheme) {
 915                             incognitoModePreference.setIcon(R.drawable.incognito_mode_disabled_dark);
 916                         } else {
 917                             incognitoModePreference.setIcon(R.drawable.incognito_mode_disabled_light);
 918                         }
 919                     }
 920                     break;
 921
 922                 case "do_not_track":
 923                     // Update the icon.
 924                     if (sharedPreferences.getBoolean("do_not_track", false)) {
 925                         if (darkTheme) {
 926                             doNotTrackPreference.setIcon(R.drawable.block_tracking_enabled_dark);
 927                         } else {
 928                             doNotTrackPreference.setIcon(R.drawable.block_tracking_enabled_light);
 929                         }
 930                     } else {
 931                         if (darkTheme) {
 932                             doNotTrackPreference.setIcon(R.drawable.block_tracking_disabled_dark);
 933                         } else {
 934                             doNotTrackPreference.setIcon(R.drawable.block_tracking_disabled_light);
 935                         }
 936                     }
 937
 938                     break;
 939
 940                 case "allow_screenshots":
 941                     // Update the icon.
 942                     if (sharedPreferences.getBoolean("allow_screenshots", false)) {
 943                         if (darkTheme) {
 944                             allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_enabled_dark);
 945                         } else {
 946                             allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_enabled_light);
 947                         }
 948                     } else {
 949                         if (darkTheme) {
 950                             allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_disabled_dark);
 951                         } else {
 952                             allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_disabled_light);
 953                         }
 954                     }
 955
 956                     // Create an intent to restart Privacy Browser.
 957                     Intent allowScreenshotsRestartIntent = getActivity().getParentActivityIntent();
 958
 959                     // Assert that the intent is not null to remove the lint error below.
 960                     assert allowScreenshotsRestartIntent != null;
 961
 962                     // `Intent.FLAG_ACTIVITY_CLEAR_TASK` removes all activities from the stack.  It requires `Intent.FLAG_ACTIVITY_NEW_TASK`.
 963                     allowScreenshotsRestartIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
 964
 965                     // Create a handler to restart the activity.
 966                     Handler allowScreenshotsRestartHandler = new Handler();
 967
 968                     // Create a runnable to restart the activity.
 969                     Runnable allowScreenshotsRestartRunnable = () -> {
 970                         // Restart the activity.
 971                         startActivity(allowScreenshotsRestartIntent);
 972
 973                         // Kill this instance of Privacy Browser.  Otherwise, the app exhibits sporadic behavior after the restart.
 974                         System.exit(0);
 975                     };
 976
 977                     // Restart the activity after 100 milliseconds, so that the app has enough time to save the change to the preference.
 978                     allowScreenshotsRestartHandler.postDelayed(allowScreenshotsRestartRunnable, 100);
 979                     break;
 980
 981                 case "easylist":
 982                     // Update the icon.
 983                     if (sharedPreferences.getBoolean("easylist", true)) {
 984                         if (darkTheme) {
 985                             easyListPreference.setIcon(R.drawable.block_ads_enabled_dark);
 986                         } else {
 987                             easyListPreference.setIcon(R.drawable.block_ads_enabled_light);
 988                         }
 989                     } else {
 990                         if (darkTheme) {
 991                             easyListPreference.setIcon(R.drawable.block_ads_disabled_dark);
 992                         } else {
 993                             easyListPreference.setIcon(R.drawable.block_ads_disabled_light);
 994                         }
 995                     }
 996                     break;
 997
 998                 case "easyprivacy":
 999                     // Update the icon.
1000                     if (sharedPreferences.getBoolean("easyprivacy", true)) {
1001                         if (darkTheme) {
1002                             easyPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_dark);
1003                         } else {
1004                             easyPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_light);
1005                         }
1006                     } else {
1007                         if (darkTheme) {
1008                             easyPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_dark);
1009                         } else {
1010                             easyPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_light);
1011                         }
1012                     }
1013                     break;
1014
1015                 case "fanboys_annoyance_list":
1016                     boolean currentFanboyAnnoyanceList = sharedPreferences.getBoolean("fanboys_annoyance_list", true);
1017                     boolean currentFanboySocialBlockingList = sharedPreferences.getBoolean("fanboys_social_blocking_list", true);
1018
1019                     // Update the Fanboy icons.
1020                     if (currentFanboyAnnoyanceList) {  // Fanboy's annoyance list is enabled.
1021                         if (darkTheme) {
1022                             // Update the Fanboy's annoyance list icon.
1023                             fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_enabled_dark);
1024
1025                             // Update the Fanboy's social blocking list icon.
1026                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_ghosted_dark);
1027                         } else {
1028                             // Update the Fanboy's annoyance list icon.
1029                             fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_enabled_light);
1030
1031                             // Update the Fanboy's social blocking list icon.
1032                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_ghosted_light);
1033                         }
1034                     } else {  // Fanboy's annoyance list is disabled.
1035                         if (darkTheme) {
1036                             // Update the Fanboy's annoyance list icon.
1037                             fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_disabled_dark);
1038
1039                             // Update the Fanboy's social blocking list icon.
1040                             if (currentFanboySocialBlockingList) {
1041                                 fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_dark);
1042                             } else {
1043                                 fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_dark);
1044                             }
1045                         } else {
1046                             // Update the Fanboy's annoyance list icon.
1047                             fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_disabled_light);
1048
1049                             // Update the Fanboy's social blocking list icon.
1050                             if (currentFanboySocialBlockingList) {
1051                                 fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_light);
1052                             } else {
1053                                 fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_light);
1054                             }
1055                         }
1056                     }
1057
1058                     // Only enable Fanboy's social blocking list preference if Fanboy's annoyance list preference is disabled.
1059                     fanboySocialBlockingListPreference.setEnabled(!currentFanboyAnnoyanceList);
1060                     break;
1061
1062                 case "fanboys_social_blocking_list":
1063                     // Update the icon.
1064                     if (sharedPreferences.getBoolean("fanboys_social_blocking_list", true)) {
1065                         if (darkTheme) {
1066                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_dark);
1067                         } else {
1068                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_light);
1069                         }
1070                     } else {
1071                         if (darkTheme) {
1072                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_dark);
1073                         } else {
1074                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_light);
1075                         }
1076                     }
1077                     break;
1078
1079                 case "ultraprivacy":
1080                     // Update the icon.
1081                     if (sharedPreferences.getBoolean("ultraprivacy", true)) {
1082                         if (darkTheme) {
1083                             ultraPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_dark);
1084                         } else {
1085                             ultraPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_light);
1086                         }
1087                     } else {
1088                         if (darkTheme) {
1089                             ultraPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_dark);
1090                         } else {
1091                             ultraPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_light);
1092                         }
1093                     }
1094                     break;
1095
1096                 case "block_all_third_party_requests":
1097                     // Update the icon.
1098                     if (sharedPreferences.getBoolean("block_all_third_party_requests", false)) {
1099                         if (darkTheme) {
1100                             blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_enabled_dark);
1101                         } else {
1102                             blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_enabled_light);
1103                         }
1104                     } else {
1105                         if (darkTheme) {
1106                             blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_disabled_dark);
1107                         } else {
1108                             blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_disabled_light);
1109                         }
1110                     }
1111                     break;
1112
1113                 case "proxy_through_orbot":
1114                     // Get current settings.
1115                     boolean currentProxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
1116                     String currentTorSearchString = sharedPreferences.getString("tor_search", getString(R.string.tor_search_default_value));
1117
1118                     // Enable the Tor custom URL search option only if `currentProxyThroughOrbot` is true and the search is set to `Custom URL`.
1119                     torSearchCustomURLPreference.setEnabled(currentProxyThroughOrbot && currentTorSearchString.equals("Custom URL"));
1120
1121                     // Update the icons.
1122                     if (currentProxyThroughOrbot) {
1123                         // Set the Tor icons according to the theme.
1124                         if (darkTheme) {
1125                             proxyThroughOrbotPreference.setIcon(R.drawable.orbot_enabled_dark);
1126                             torHomepagePreference.setIcon(R.drawable.home_enabled_dark);
1127                             torSearchPreference.setIcon(R.drawable.search_enabled_dark);
1128
1129                             // Set the `torSearchCustomURLPreference` icon.
1130                             if (torSearchCustomURLPreference.isEnabled()) {
1131                                 torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
1132                             } else {
1133                                 torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
1134                             }
1135                         } else {
1136                             proxyThroughOrbotPreference.setIcon(R.drawable.orbot_enabled_light);
1137                             torHomepagePreference.setIcon(R.drawable.home_enabled_light);
1138                             torSearchPreference.setIcon(R.drawable.search_enabled_light);
1139
1140                             // Set the `torSearchCustomURLPreference` icon.
1141                             if (torSearchCustomURLPreference.isEnabled()) {
1142                                 torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
1143                             } else {
1144                                 torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
1145                             }
1146                         }
1147                     } else {  // Proxy through Orbot is disabled.
1148                         if (darkTheme) {
1149                             proxyThroughOrbotPreference.setIcon(R.drawable.orbot_disabled_dark);
1150                             torHomepagePreference.setIcon(R.drawable.home_ghosted_dark);
1151                             torSearchPreference.setIcon(R.drawable.search_ghosted_dark);
1152                             torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
1153                         } else {
1154                             proxyThroughOrbotPreference.setIcon(R.drawable.orbot_disabled_light);
1155                             torHomepagePreference.setIcon(R.drawable.home_ghosted_light);
1156                             torSearchPreference.setIcon(R.drawable.search_ghosted_light);
1157                             torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
1158                         }
1159                     }
1160                     break;
1161
1162                 case "tor_homepage":
1163                     // Set the new tor homepage URL as the summary text for the `tor_homepage` preference.  The default is Searx:  `http://ulrn6sryqaifefld.onion/`.
1164                     torHomepagePreference.setSummary(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
1165                     break;
1166
1167                 case "tor_search":
1168                     // Get the present search string.
1169                     String presentTorSearchString = sharedPreferences.getString("tor_search", getString(R.string.tor_search_default_value));
1170
1171                     // Update the preferences.
1172                     if (presentTorSearchString.equals("Custom URL")) {
1173                         // Use `R.string.custom_url`, which is translated, as the summary instead of the array value, which isn't.
1174                         torSearchPreference.setSummary(R.string.custom_url);
1175
1176                         // Enable `torSearchCustomURLPreference`.
1177                         torSearchCustomURLPreference.setEnabled(true);
1178
1179                         // Update the `torSearchCustomURLPreference` icon.
1180                         if (darkTheme) {
1181                             torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
1182                         } else {
1183                             torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
1184                         }
1185                     } else {
1186                         // Set the array value as the summary text.
1187                         torSearchPreference.setSummary(presentTorSearchString);
1188
1189                         // Disable `torSearchCustomURLPreference`.
1190                         torSearchCustomURLPreference.setEnabled(false);
1191
1192                         // Update the `torSearchCustomURLPreference` icon.
1193                         if (darkTheme) {
1194                             torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
1195                         } else {
1196                             torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
1197                         }
1198                     }
1199                     break;
1200
1201                 case "tor_search_custom_url":
1202                     // Set the summary text for `tor_search_custom_url`.
1203                     torSearchCustomURLPreference.setSummary(sharedPreferences.getString("tor_search_custom_url", getString(R.string.tor_search_custom_url_default_value)));
1204                     break;
1205
1206                 case "search":
1207                     // Store the new search string.
1208                     String newSearchString = sharedPreferences.getString("search", getString(R.string.search_default_value));
1209
1210                     // Update `searchPreference` and `searchCustomURLPreference`.
1211                     if (newSearchString.equals("Custom URL")) {  // `Custom URL` is selected.
1212                         // Set the summary text to `R.string.custom_url`, which is translated.
1213                         searchPreference.setSummary(R.string.custom_url);
1214
1215                         // Enable `searchCustomURLPreference`.
1216                         searchCustomURLPreference.setEnabled(true);
1217
1218                         // Set the `searchCustomURLPreference` according to the theme.
1219                         if (darkTheme) {
1220                             searchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
1221                         } else {
1222                             searchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
1223                         }
1224                     } else {  // `Custom URL` is not selected.
1225                         // Set the summary text to `newSearchString`.
1226                         searchPreference.setSummary(newSearchString);
1227
1228                         // Disable `searchCustomURLPreference`.
1229                         searchCustomURLPreference.setEnabled(false);
1230
1231                         // Set the `searchCustomURLPreference` according to the theme.
1232                         if (darkTheme) {
1233                             searchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
1234                         } else {
1235                             searchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
1236                         }
1237                     }
1238                     break;
1239
1240                 case "search_custom_url":
1241                     // Set the new custom search URL as the summary text for `search_custom_url`.  The default is `""`.
1242                     searchCustomURLPreference.setSummary(sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value)));
1243                     break;
1244
1245                 case "full_screen_browsing_mode":
1246                     if (sharedPreferences.getBoolean("full_screen_browsing_mode", false)) {  // Full screen browsing is enabled.
1247                         // Set the full screen browsing mode preference icon according to the theme.
1248                         if (darkTheme) {
1249                             fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_dark);
1250                         } else {
1251                             fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_light);
1252                         }
1253
1254                         // Set the hide app bar preference icon.
1255                         if (sharedPreferences.getBoolean("hide_app_bar", true)) {  //  Hide app bar is enabled.
1256                             // Set the icon according to the theme.
1257                             if (darkTheme) {
1258                                 hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
1259                             } else {
1260                                 hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
1261                             }
1262                         } else {  // Hide app bar is disabled.
1263                             // Set the icon according to the theme.
1264                             if (darkTheme) {
1265                                 hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
1266                             } else {
1267                                 hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
1268                             }
1269                         }
1270                     } else {  // Full screen browsing is disabled.
1271                         // Update the icons according to the theme.
1272                         if (darkTheme) {
1273                             fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_dark);
1274                             hideAppBarPreference.setIcon(R.drawable.app_bar_ghosted_dark);
1275                         } else {
1276                             fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_light);
1277                             hideAppBarPreference.setIcon(R.drawable.app_bar_ghosted_light);
1278                         }
1279                     }
1280                     break;
1281
1282                 case "hide_app_bar":
1283                     // Update the icon.
1284                     if (sharedPreferences.getBoolean("hide_app_bar", true)) {  // Hide app bar is enabled.
1285                         // Set the icon according to the theme.
1286                         if (darkTheme) {
1287                             hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
1288                         } else {
1289                             hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
1290                         }
1291                     } else {  // Hide app bar is disabled.
1292                         // Set the icon according to the theme.
1293                         if (darkTheme) {
1294                             hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
1295                         } else {
1296                             hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
1297                         }
1298                     }
1299                     break;
1300
1301                 case "clear_everything":
1302                     // Store the new `clear_everything` status
1303                     boolean newClearEverythingBoolean = sharedPreferences.getBoolean("clear_everything", true);
1304
1305                     // Update the status of the `Clear and Exit` preferences.
1306                     clearCookiesPreference.setEnabled(!newClearEverythingBoolean);
1307                     clearDomStoragePreference.setEnabled(!newClearEverythingBoolean);
1308                     clearFormDataPreference.setEnabled(!newClearEverythingBoolean);  // This line can be removed once the minimum API >= 26.
1309                     clearCachePreference.setEnabled(!newClearEverythingBoolean);
1310
1311                     // Update the `clearEverythingPreference` icon.
1312                     if (newClearEverythingBoolean) {
1313                         if (darkTheme) {
1314                             clearEverythingPreference.setIcon(R.drawable.clear_everything_enabled_dark);
1315                         } else {
1316                             clearEverythingPreference.setIcon(R.drawable.clear_everything_enabled_light);
1317                         }
1318                     } else {
1319                         clearEverythingPreference.setIcon(R.drawable.clear_everything_disabled);
1320                     }
1321
1322                     // Update the `clearCookiesPreference` icon.
1323                     if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_cookies", true)) {
1324                         if (darkTheme) {
1325                             clearCookiesPreference.setIcon(R.drawable.cookies_cleared_dark);
1326                         } else {
1327                             clearCookiesPreference.setIcon(R.drawable.cookies_cleared_light);
1328                         }
1329                     } else {
1330                         clearCookiesPreference.setIcon(R.drawable.cookies_warning);
1331                     }
1332
1333                     // Update the `clearDomStoragePreference` icon.
1334                     if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_dom_storage", true)) {
1335                         if (darkTheme) {
1336                             clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_dark);
1337                         } else {
1338                             clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_light);
1339                         }
1340                     } else {
1341                         clearDomStoragePreference.setIcon(R.drawable.dom_storage_warning);
1342                     }
1343
1344                     // Update the clear form data preference icon if the API < 26.
1345                     if (Build.VERSION.SDK_INT < 26) {
1346                         if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_form_data", true)) {
1347                             if (darkTheme) {
1348                                 clearFormDataPreference.setIcon(R.drawable.form_data_cleared_dark);
1349                             } else {
1350                                 clearFormDataPreference.setIcon(R.drawable.form_data_cleared_light);
1351                             }
1352                         } else {
1353                             clearFormDataPreference.setIcon(R.drawable.form_data_warning);
1354                         }
1355                     }
1356
1357                     // Update the `clearCachePreference` icon.
1358                     if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_cache", true)) {
1359                         if (darkTheme) {
1360                             clearCachePreference.setIcon(R.drawable.cache_cleared_dark);
1361                         } else {
1362                             clearCachePreference.setIcon(R.drawable.cache_cleared_light);
1363                         }
1364                     } else {
1365                         clearCachePreference.setIcon(R.drawable.cache_warning);
1366                     }
1367                     break;
1368
1369                 case "clear_cookies":
1370                     // Update the icon.
1371                     if (sharedPreferences.getBoolean("clear_cookies", true)) {
1372                         if (darkTheme) {
1373                             clearCookiesPreference.setIcon(R.drawable.cookies_cleared_dark);
1374                         } else {
1375                             clearCookiesPreference.setIcon(R.drawable.cookies_cleared_light);
1376                         }
1377                     } else {
1378                         clearCookiesPreference.setIcon(R.drawable.cookies_warning);
1379                     }
1380                     break;
1381
1382                 case "clear_dom_storage":
1383                     // Update the icon.
1384                     if (sharedPreferences.getBoolean("clear_dom_storage", true)) {
1385                         if (darkTheme) {
1386                             clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_dark);
1387                         } else {
1388                             clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_light);
1389                         }
1390                     } else {
1391                         clearDomStoragePreference.setIcon(R.drawable.dom_storage_warning);
1392                     }
1393                     break;
1394
1395                 // This section can be removed once the minimum API >= 26.
1396                 case "clear_form_data":
1397                     // Update the icon.
1398                     if (sharedPreferences.getBoolean("clear_form_data", true)) {
1399                         if (darkTheme) {
1400                             clearFormDataPreference.setIcon(R.drawable.form_data_cleared_dark);
1401                         } else {
1402                             clearFormDataPreference.setIcon(R.drawable.form_data_cleared_light);
1403                         }
1404                     } else {
1405                         clearFormDataPreference.setIcon(R.drawable.form_data_warning);
1406                     }
1407                     break;
1408
1409                 case "clear_cache":
1410                     // Update the icon.
1411                     if (sharedPreferences.getBoolean("clear_cache", true)) {
1412                         if (darkTheme) {
1413                             clearCachePreference.setIcon(R.drawable.cache_cleared_dark);
1414                         } else {
1415                             clearCachePreference.setIcon(R.drawable.cache_cleared_light);
1416                         }
1417                     } else {
1418                         clearCachePreference.setIcon(R.drawable.cache_warning);
1419                     }
1420                     break;
1421
1422                 case "homepage":
1423                     // Set the new homepage URL as the summary text for the Homepage preference.
1424                     homepagePreference.setSummary(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
1425                     break;
1426
1427                 case "font_size":
1428                     // Update the font size summary text.
1429                     fontSizePreference.setSummary(sharedPreferences.getString("font_size", getString(R.string.font_size_default_value)) + "%%");
1430                     break;
1431
1432                 case "open_intents_in_new_tab":
1433                     // Update the icon.
1434                     if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {
1435                         if (darkTheme) {
1436                             openIntentsInNewTabPreference.setIcon(R.drawable.tab_enabled_dark);
1437                         } else {
1438                             openIntentsInNewTabPreference.setIcon(R.drawable.tab_enabled_light);
1439                         }
1440                     } else {
1441                         if (darkTheme) {
1442                             openIntentsInNewTabPreference.setIcon(R.drawable.tab_disabled_dark);
1443                         } else {
1444                             openIntentsInNewTabPreference.setIcon(R.drawable.tab_disabled_light);
1445                         }
1446                     }
1447                     break;
1448
1449                 case "swipe_to_refresh":
1450                     // Update the icon.
1451                     if (sharedPreferences.getBoolean("swipe_to_refresh", true)) {
1452                         if (darkTheme) {
1453                             swipeToRefreshPreference.setIcon(R.drawable.refresh_enabled_dark);
1454                         } else {
1455                             swipeToRefreshPreference.setIcon(R.drawable.refresh_enabled_light);
1456                         }
1457                     } else {
1458                         if (darkTheme) {
1459                             swipeToRefreshPreference.setIcon(R.drawable.refresh_disabled_dark);
1460                         } else {
1461                             swipeToRefreshPreference.setIcon(R.drawable.refresh_disabled_light);
1462                         }
1463                     }
1464                     break;
1465
1466                 case "scroll_app_bar":
1467                     // Update the icon.
1468                     if (sharedPreferences.getBoolean("scroll_app_bar", true)) {
1469                         if (darkTheme) {
1470                             scrollAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
1471                         } else {
1472                             scrollAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
1473                         }
1474                     } else {
1475                         if (darkTheme) {
1476                             scrollAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
1477                         } else {
1478                             scrollAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
1479                         }
1480                     }
1481                     break;
1482
1483                 case "display_additional_app_bar_icons":
1484                     // Update the icon.
1485                     if (sharedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
1486                         if (darkTheme) {
1487                             displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_enabled_dark);
1488                         } else {
1489                             displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_enabled_light);
1490                         }
1491                     } else {
1492                         if (darkTheme) {
1493                             displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_disabled_dark);
1494                         } else {
1495                             displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_disabled_light);
1496                         }
1497                     }
1498                     break;
1499
1500                 case "download_with_external_app":
1501                     // Update the icon.
1502                     if (sharedPreferences.getBoolean("download_with_external_app", false)) {
1503                         if (darkTheme) {
1504                             downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_enabled_dark);
1505                         } else {
1506                             downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_enabled_light);
1507                         }
1508                     } else {
1509                         if (darkTheme) {
1510                             downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_disabled_dark);
1511                         } else {
1512                             downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_disabled_light);
1513                         }
1514                     }
1515                     break;
1516
1517                 case "dark_theme":
1518                     // Update the icon.
1519                     if (sharedPreferences.getBoolean("dark_theme", false)) {
1520                         darkThemePreference.setIcon(R.drawable.theme_dark);
1521                     } else {
1522                         darkThemePreference.setIcon(R.drawable.theme_light);
1523                     }
1524
1525                     // Create an intent to restart Privacy Browser.
1526                     Intent changeThemeRestartIntent = getActivity().getParentActivityIntent();
1527
1528                     // Assert that the intent is not null to remove the lint error below.
1529                     assert changeThemeRestartIntent != null;
1530
1531                     // `Intent.FLAG_ACTIVITY_CLEAR_TASK` removes all activities from the stack.  It requires `Intent.FLAG_ACTIVITY_NEW_TASK`.
1532                     changeThemeRestartIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
1533
1534                     // Create a handler to restart the activity.
1535                     Handler changeThemeRestartHandler = new Handler();
1536
1537                     // Create a runnable to restart the activity.
1538                     Runnable changeThemeRestartRunnable = () -> {
1539                         // Restart the activity.
1540                         startActivity(changeThemeRestartIntent);
1541
1542                         // Kill this instance of Privacy Browser.  Otherwise, the app exhibits sporadic behavior after the restart.
1543                         System.exit(0);
1544                     };
1545
1546                     // Restart the activity after 100 milliseconds, so that the app has enough time to save the change to the preference.
1547                     changeThemeRestartHandler.postDelayed(changeThemeRestartRunnable, 100);
1548                     break;
1549
1550                 case "night_mode":
1551                     // Store the current night mode status.
1552                     boolean currentNightModeBoolean = sharedPreferences.getBoolean("night_mode", false);
1553                     boolean currentJavaScriptBoolean = sharedPreferences.getBoolean("javascript", false);
1554
1555                     // Update the icon.
1556                     if (currentNightModeBoolean) {
1557                         if (darkTheme) {
1558                             nightModePreference.setIcon(R.drawable.night_mode_enabled_dark);
1559                         } else {
1560                             nightModePreference.setIcon(R.drawable.night_mode_enabled_light);
1561                         }
1562                     } else {
1563                         if (darkTheme) {
1564                             nightModePreference.setIcon(R.drawable.night_mode_disabled_dark);
1565                         } else {
1566                             nightModePreference.setIcon(R.drawable.night_mode_disabled_light);
1567                         }
1568                     }
1569
1570                     // Update the status of `javaScriptPreference` and `domStoragePreference`.
1571                     javaScriptPreference.setEnabled(!currentNightModeBoolean);
1572                     domStoragePreference.setEnabled(currentNightModeBoolean || currentJavaScriptBoolean);
1573
1574                     // Update the `javaScriptPreference` icon.
1575                     if (currentNightModeBoolean || currentJavaScriptBoolean) {
1576                         javaScriptPreference.setIcon(R.drawable.javascript_enabled);
1577                     } else {
1578                         javaScriptPreference.setIcon(R.drawable.privacy_mode);
1579                     }
1580
1581                     // Update the DOM storage preference icon.
1582                     if (currentNightModeBoolean || currentJavaScriptBoolean) {  // The preference is enabled.
1583                         if (sharedPreferences.getBoolean("dom_storage", false)) {  // DOM storage is enabled.
1584                             domStoragePreference.setIcon(R.drawable.dom_storage_enabled);
1585                         } else {  // DOM storage is disabled.
1586                             if (darkTheme) {
1587                                 domStoragePreference.setIcon(R.drawable.dom_storage_disabled_dark);
1588                             } else {
1589                                 domStoragePreference.setIcon(R.drawable.dom_storage_disabled_light);
1590                             }
1591                         }
1592                     } else {  // The preference is disabled.  The icon should be ghosted.
1593                         if (darkTheme) {
1594                             domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_dark);
1595                         } else {
1596                             domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_light);
1597                         }
1598                     }
1599                     break;
1600
1601                 case "display_webpage_images":
1602                     if (sharedPreferences.getBoolean("display_webpage_images", true)) {
1603                         // Update the icon.
1604                         if (darkTheme) {
1605                             displayWebpageImagesPreference.setIcon(R.drawable.images_enabled_dark);
1606                         } else {
1607                             displayWebpageImagesPreference.setIcon(R.drawable.images_enabled_light);
1608                         }
1609                     } else {
1610                         // Update the icon.
1611                         if (darkTheme) {
1612                             displayWebpageImagesPreference.setIcon(R.drawable.images_disabled_dark);
1613                         } else {
1614                             displayWebpageImagesPreference.setIcon(R.drawable.images_disabled_light);
1615                         }
1616                     }
1617                     break;
1618             }
1619         };
1620
1621         // Register the listener.
1622         savedPreferences.registerOnSharedPreferenceChangeListener(preferencesListener);
1623     }
1624
1625     // It is necessary to re-register the listener on every resume or it will randomly stop working because apps can be paused and resumed at any time, even while running in the foreground.
1626     @Override
1627     public void onPause() {
1628         super.onPause();
1629         savedPreferences.unregisterOnSharedPreferenceChangeListener(preferencesListener);
1630     }
1631
1632     @Override
1633     public void onResume() {
1634         super.onResume();
1635         savedPreferences.registerOnSharedPreferenceChangeListener(preferencesListener);
1636     }
1637 }