app/src/main/java/com/stoutner/privacybrowser/helpers/ImportExportDatabaseHelper.java

   1 /*
   2  * Copyright © 2018 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.helpers;
  21
  22 import android.content.ContentValues;
  23 import android.content.Context;
  24 import android.content.SharedPreferences;
  25 import android.database.Cursor;
  26 import android.database.sqlite.SQLiteDatabase;
  27 import android.preference.PreferenceManager;
  28
  29 import com.stoutner.privacybrowser.R;
  30
  31 import java.io.File;
  32 import java.io.FileInputStream;
  33 import java.io.FileOutputStream;
  34 import java.io.InputStream;
  35 import java.io.OutputStream;
  36
  37 public class ImportExportDatabaseHelper {
  38     public static final String EXPORT_SUCCESSFUL = "Export Successful";
  39     public static final String IMPORT_SUCCESSFUL = "Import Successful";
  40
  41     private static final int SCHEMA_VERSION = 3;
  42     private static final String PREFERENCES_TABLE = "preferences";
  43
  44     // The preferences constants.
  45     private static final String _ID = "_id";
  46     private static final String JAVASCRIPT = "javascript";
  47     private static final String FIRST_PARTY_COOKIES = "first_party_cookies";
  48     private static final String THIRD_PARTY_COOKIES = "third_party_cookies";
  49     private static final String DOM_STORAGE = "dom_storage";
  50     private static final String SAVE_FORM_DATA = "save_form_data";
  51     private static final String USER_AGENT = "user_agent";
  52     private static final String CUSTOM_USER_AGENT = "custom_user_agent";
  53     private static final String INCOGNITO_MODE = "incognito_mode";
  54     private static final String DO_NOT_TRACK = "do_not_track";
  55     private static final String ALLOW_SCREENSHOTS = "allow_screenshots";
  56     private static final String EASYLIST = "easylist";
  57     private static final String EASYPRIVACY = "easyprivacy";
  58     private static final String FANBOYS_ANNOYANCE_LIST = "fanboys_annoyance_list";
  59     private static final String FANBOYS_SOCIAL_BLOCKING_LIST = "fanboys_social_blocking_list";
  60     private static final String ULTRAPRIVACY = "ultraprivacy";
  61     private static final String BLOCK_ALL_THIRD_PARTY_REQUESTS = "block_all_third_party_requests";
  62     private static final String PROXY_THROUGH_ORBOT = "proxy_through_orbot";
  63     private static final String TOR_HOMEPAGE = "tor_homepage";
  64     private static final String TOR_SEARCH = "tor_search";
  65     private static final String TOR_SEARCH_CUSTOM_URL = "tor_search_custom_url";
  66     private static final String SEARCH = "search";
  67     private static final String SEARCH_CUSTOM_URL = "search_custom_url";
  68     private static final String FULL_SCREEN_BROWSING_MODE = "full_screen_browsing_mode";
  69     private static final String HIDE_SYSTEM_BARS = "hide_system_bars";
  70     private static final String TRANSLUCENT_NAVIGATION_BAR = "translucent_navigation_bar";
  71     private static final String CLEAR_EVERYTHING = "clear_everything";
  72     private static final String CLEAR_COOKIES = "clear_cookies";
  73     private static final String CLEAR_DOM_STORAGE = "clear_dom_storage";
  74     private static final String CLEAR_FORM_DATA = "clear_form_data";
  75     private static final String CLEAR_CACHE = "clear_cache";
  76     private static final String HOMEPAGE = "homepage";
  77     private static final String FONT_SIZE = "font_size";
  78     private static final String SWIPE_TO_REFRESH = "swipe_to_refresh";
  79     private static final String DOWNLOAD_WITH_EXTERNAL_APP = "download_with_external_app";
  80     private static final String DISPLAY_ADDITIONAL_APP_BAR_ICONS = "display_additional_app_bar_icons";
  81     private static final String DARK_THEME = "dark_theme";
  82     private static final String NIGHT_MODE = "night_mode";
  83     private static final String DISPLAY_WEBPAGE_IMAGES = "display_webpage_images";
  84
  85     public String exportUnencrypted(File exportFile, Context context) {
  86         try {
  87             // Delete the current file if it exists.
  88             if (exportFile.exists()) {
  89                 //noinspection ResultOfMethodCallIgnored
  90                 exportFile.delete();
  91             }
  92
  93             // Create the export database.
  94             SQLiteDatabase exportDatabase = SQLiteDatabase.openOrCreateDatabase(exportFile, null);
  95
  96             // Set the export database version number.
  97             exportDatabase.setVersion(SCHEMA_VERSION);
  98
  99             // Create the export database domains table.
 100             exportDatabase.execSQL(DomainsDatabaseHelper.CREATE_DOMAINS_TABLE);
 101
 102             // Open the domains database.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
 103             DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(context, null, null, 0);
 104
 105             // Get a full domains database cursor.
 106             Cursor domainsCursor = domainsDatabaseHelper.getCompleteCursorOrderedByDomain();
 107
 108             // Move to the first domain.
 109             domainsCursor.moveToFirst();
 110
 111             // Copy the data from the domains cursor into the export database.
 112             for (int i = 0; i < domainsCursor.getCount(); i++) {
 113                 // Extract the record from the cursor and store the data in a ContentValues.
 114                 ContentValues domainsContentValues = new ContentValues();
 115                 domainsContentValues.put(DomainsDatabaseHelper.DOMAIN_NAME, domainsCursor.getString(domainsCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME)));
 116                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_JAVASCRIPT, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)));
 117                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)));
 118                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)));
 119                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_DOM_STORAGE, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)));
 120                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_FORM_DATA, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)));
 121                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_EASYLIST, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYLIST)));
 122                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_EASYPRIVACY, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)));
 123                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)));
 124                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)));
 125                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)));
 126                 domainsContentValues.put(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)));
 127                 domainsContentValues.put(DomainsDatabaseHelper.USER_AGENT, domainsCursor.getString(domainsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT)));
 128                 domainsContentValues.put(DomainsDatabaseHelper.FONT_SIZE, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE)));
 129                 domainsContentValues.put(DomainsDatabaseHelper.SWIPE_TO_REFRESH, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SWIPE_TO_REFRESH)));
 130                 domainsContentValues.put(DomainsDatabaseHelper.NIGHT_MODE, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.NIGHT_MODE)));
 131                 domainsContentValues.put(DomainsDatabaseHelper.DISPLAY_IMAGES, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES)));
 132                 domainsContentValues.put(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE, domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)));
 133                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME, domainsCursor.getString(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME)));
 134                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION, domainsCursor.getString(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION)));
 135                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT, domainsCursor.getString(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT)));
 136                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME, domainsCursor.getString(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME)));
 137                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION, domainsCursor.getString(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION)));
 138                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT, domainsCursor.getString(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT)));
 139                 domainsContentValues.put(DomainsDatabaseHelper.SSL_START_DATE, domainsCursor.getLong(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE)));
 140                 domainsContentValues.put(DomainsDatabaseHelper.SSL_END_DATE, domainsCursor.getLong(domainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE)));
 141
 142                 // Insert the record into the export database.
 143                 exportDatabase.insert(DomainsDatabaseHelper.DOMAINS_TABLE, null, domainsContentValues);
 144
 145                 // Advance to the next record.
 146                 domainsCursor.moveToNext();
 147             }
 148
 149             // Close the domains database.
 150             domainsCursor.close();
 151             domainsDatabaseHelper.close();
 152
 153
 154             // Create the export database bookmarks table.
 155             exportDatabase.execSQL(BookmarksDatabaseHelper.CREATE_BOOKMARKS_TABLE);
 156
 157             // Open the bookmarks database.  The `0` specifies the database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
 158             BookmarksDatabaseHelper bookmarksDatabaseHelper = new BookmarksDatabaseHelper(context, null, null, 0);
 159
 160             // Get a full bookmarks cursor.
 161             Cursor bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursor();
 162
 163             // Move to the first bookmark.
 164             bookmarksCursor.moveToFirst();
 165
 166             // Copy the data from the bookmarks cursor into the export database.
 167             for (int i = 0; i < bookmarksCursor.getCount(); i++) {
 168                 // Extract the record from the cursor and store the data in a ContentValues.
 169                 ContentValues bookmarksContentValues = new ContentValues();
 170                 bookmarksContentValues.put(BookmarksDatabaseHelper.BOOKMARK_NAME, bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME)));
 171                 bookmarksContentValues.put(BookmarksDatabaseHelper.BOOKMARK_URL, bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
 172                 bookmarksContentValues.put(BookmarksDatabaseHelper.PARENT_FOLDER, bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.PARENT_FOLDER)));
 173                 bookmarksContentValues.put(BookmarksDatabaseHelper.DISPLAY_ORDER, bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)));
 174                 bookmarksContentValues.put(BookmarksDatabaseHelper.IS_FOLDER, bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)));
 175                 bookmarksContentValues.put(BookmarksDatabaseHelper.FAVORITE_ICON, bookmarksCursor.getBlob(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON)));
 176
 177                 // Insert the record into the export database.
 178                 exportDatabase.insert(BookmarksDatabaseHelper.BOOKMARKS_TABLE, null, bookmarksContentValues);
 179
 180                 // Advance to the next record.
 181                 bookmarksCursor.moveToNext();
 182             }
 183
 184             // Close the bookmarks database.
 185             bookmarksCursor.close();
 186             bookmarksDatabaseHelper.close();
 187
 188
 189             // Prepare the preferences table SQL creation string.
 190             String CREATE_PREFERENCES_TABLE = "CREATE TABLE " + PREFERENCES_TABLE + " (" +
 191                     _ID + " INTEGER PRIMARY KEY, " +
 192                     JAVASCRIPT + " BOOLEAN, " +
 193                     FIRST_PARTY_COOKIES + " BOOLEAN, " +
 194                     THIRD_PARTY_COOKIES + " BOOLEAN, " +
 195                     DOM_STORAGE + " BOOLEAN, " +
 196                     SAVE_FORM_DATA + " BOOLEAN, " +
 197                     USER_AGENT + " TEXT, " +
 198                     CUSTOM_USER_AGENT + " TEXT, " +
 199                     INCOGNITO_MODE + " BOOLEAN, " +
 200                     DO_NOT_TRACK + " BOOLEAN, " +
 201                     ALLOW_SCREENSHOTS + " BOOLEAN, " +
 202                     EASYLIST + " BOOLEAN, " +
 203                     EASYPRIVACY + " BOOLEAN, " +
 204                     FANBOYS_ANNOYANCE_LIST + " BOOLEAN, " +
 205                     FANBOYS_SOCIAL_BLOCKING_LIST + " BOOLEAN, " +
 206                     ULTRAPRIVACY + " BOOLEAN, " +
 207                     BLOCK_ALL_THIRD_PARTY_REQUESTS + " BOOLEAN, " +
 208                     PROXY_THROUGH_ORBOT + " BOOLEAN, " +
 209                     TOR_HOMEPAGE + " TEXT, " +
 210                     TOR_SEARCH + " TEXT, " +
 211                     TOR_SEARCH_CUSTOM_URL + " TEXT, " +
 212                     SEARCH + " TEXT, " +
 213                     SEARCH_CUSTOM_URL + " TEXT, " +
 214                     FULL_SCREEN_BROWSING_MODE + " BOOLEAN, " +
 215                     HIDE_SYSTEM_BARS + " BOOLEAN, " +
 216                     TRANSLUCENT_NAVIGATION_BAR + " BOOLEAN, " +
 217                     CLEAR_EVERYTHING + " BOOLEAN, " +
 218                     CLEAR_COOKIES + " BOOLEAN, " +
 219                     CLEAR_DOM_STORAGE + " BOOLEAN, " +
 220                     CLEAR_FORM_DATA + " BOOLEAN, " +
 221                     CLEAR_CACHE + " BOOLEAN, " +
 222                     HOMEPAGE + " TEXT, " +
 223                     FONT_SIZE + " TEXT, " +
 224                     SWIPE_TO_REFRESH + " BOOLEAN, " +
 225                     DOWNLOAD_WITH_EXTERNAL_APP + " BOOLEAN, " +
 226                     DISPLAY_ADDITIONAL_APP_BAR_ICONS + " BOOLEAN, " +
 227                     DARK_THEME + " BOOLEAN, " +
 228                     NIGHT_MODE + " BOOLEAN, " +
 229                     DISPLAY_WEBPAGE_IMAGES + " BOOLEAN)";
 230
 231             // Create the export database preferences table.
 232             exportDatabase.execSQL(CREATE_PREFERENCES_TABLE);
 233
 234             // Get a handle for the shared preference.
 235             SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
 236
 237             // Create a ContentValues with the preferences information.
 238             ContentValues preferencesContentValues = new ContentValues();
 239             preferencesContentValues.put(JAVASCRIPT, sharedPreferences.getBoolean(JAVASCRIPT, false));
 240             preferencesContentValues.put(FIRST_PARTY_COOKIES, sharedPreferences.getBoolean(FIRST_PARTY_COOKIES, false));
 241             preferencesContentValues.put(THIRD_PARTY_COOKIES, sharedPreferences.getBoolean(THIRD_PARTY_COOKIES, false));
 242             preferencesContentValues.put(DOM_STORAGE, sharedPreferences.getBoolean(DOM_STORAGE, false));
 243             preferencesContentValues.put(SAVE_FORM_DATA, sharedPreferences.getBoolean(SAVE_FORM_DATA, false));  // Save form data can be removed once the minimum API >= 26.
 244             preferencesContentValues.put(USER_AGENT, sharedPreferences.getString(USER_AGENT, context.getString(R.string.user_agent_default_value)));
 245             preferencesContentValues.put(CUSTOM_USER_AGENT, sharedPreferences.getString(CUSTOM_USER_AGENT, context.getString(R.string.custom_user_agent_default_value)));
 246             preferencesContentValues.put(INCOGNITO_MODE, sharedPreferences.getBoolean(INCOGNITO_MODE, false));
 247             preferencesContentValues.put(DO_NOT_TRACK, sharedPreferences.getBoolean(DO_NOT_TRACK, false));
 248             preferencesContentValues.put(ALLOW_SCREENSHOTS, sharedPreferences.getBoolean(ALLOW_SCREENSHOTS, false));
 249             preferencesContentValues.put(EASYLIST, sharedPreferences.getBoolean(EASYLIST, true));
 250             preferencesContentValues.put(EASYPRIVACY, sharedPreferences.getBoolean(EASYPRIVACY, true));
 251             preferencesContentValues.put(FANBOYS_ANNOYANCE_LIST, sharedPreferences.getBoolean(FANBOYS_ANNOYANCE_LIST, true));
 252             preferencesContentValues.put(FANBOYS_SOCIAL_BLOCKING_LIST, sharedPreferences.getBoolean(FANBOYS_SOCIAL_BLOCKING_LIST, true));
 253             preferencesContentValues.put(ULTRAPRIVACY, sharedPreferences.getBoolean(ULTRAPRIVACY, true));
 254             preferencesContentValues.put(BLOCK_ALL_THIRD_PARTY_REQUESTS, sharedPreferences.getBoolean(BLOCK_ALL_THIRD_PARTY_REQUESTS, false));
 255             preferencesContentValues.put(PROXY_THROUGH_ORBOT, sharedPreferences.getBoolean(PROXY_THROUGH_ORBOT, false));
 256             preferencesContentValues.put(TOR_HOMEPAGE, sharedPreferences.getString(TOR_HOMEPAGE, context.getString(R.string.tor_homepage_default_value)));
 257             preferencesContentValues.put(TOR_SEARCH, sharedPreferences.getString(TOR_SEARCH, context.getString(R.string.tor_search_default_value)));
 258             preferencesContentValues.put(TOR_SEARCH_CUSTOM_URL, sharedPreferences.getString(TOR_SEARCH_CUSTOM_URL, context.getString(R.string.tor_search_custom_url_default_value)));
 259             preferencesContentValues.put(SEARCH, sharedPreferences.getString(SEARCH, context.getString(R.string.search_default_value)));
 260             preferencesContentValues.put(SEARCH_CUSTOM_URL, sharedPreferences.getString(SEARCH_CUSTOM_URL, context.getString(R.string.search_custom_url_default_value)));
 261             preferencesContentValues.put(FULL_SCREEN_BROWSING_MODE, sharedPreferences.getBoolean(FULL_SCREEN_BROWSING_MODE, false));
 262             preferencesContentValues.put(HIDE_SYSTEM_BARS, sharedPreferences.getBoolean(HIDE_SYSTEM_BARS, false));
 263             preferencesContentValues.put(TRANSLUCENT_NAVIGATION_BAR, sharedPreferences.getBoolean(TRANSLUCENT_NAVIGATION_BAR, true));
 264             preferencesContentValues.put(CLEAR_EVERYTHING, sharedPreferences.getBoolean(CLEAR_EVERYTHING, true));
 265             preferencesContentValues.put(CLEAR_COOKIES, sharedPreferences.getBoolean(CLEAR_COOKIES, true));
 266             preferencesContentValues.put(CLEAR_DOM_STORAGE, sharedPreferences.getBoolean(CLEAR_DOM_STORAGE, true));
 267             preferencesContentValues.put(CLEAR_FORM_DATA, sharedPreferences.getBoolean(CLEAR_FORM_DATA, true));  // Clear form data can be removed once the minimum API >= 26.
 268             preferencesContentValues.put(CLEAR_CACHE, sharedPreferences.getBoolean(CLEAR_CACHE, true));
 269             preferencesContentValues.put(HOMEPAGE, sharedPreferences.getString(HOMEPAGE, context.getString(R.string.homepage_default_value)));
 270             preferencesContentValues.put(FONT_SIZE, sharedPreferences.getString(FONT_SIZE, context.getString(R.string.font_size_default_value)));
 271             preferencesContentValues.put(SWIPE_TO_REFRESH, sharedPreferences.getBoolean(SWIPE_TO_REFRESH, true));
 272             preferencesContentValues.put(DOWNLOAD_WITH_EXTERNAL_APP, sharedPreferences.getBoolean(DOWNLOAD_WITH_EXTERNAL_APP, false));
 273             preferencesContentValues.put(DISPLAY_ADDITIONAL_APP_BAR_ICONS, sharedPreferences.getBoolean(DISPLAY_ADDITIONAL_APP_BAR_ICONS, false));
 274             preferencesContentValues.put(DARK_THEME, sharedPreferences.getBoolean(DARK_THEME, false));
 275             preferencesContentValues.put(NIGHT_MODE, sharedPreferences.getBoolean(NIGHT_MODE, false));
 276             preferencesContentValues.put(DISPLAY_WEBPAGE_IMAGES, sharedPreferences.getBoolean(DISPLAY_WEBPAGE_IMAGES, true));
 277
 278             // Insert the preferences into the export database.
 279             exportDatabase.insert(PREFERENCES_TABLE, null, preferencesContentValues);
 280
 281             // Close the export database.
 282             exportDatabase.close();
 283
 284             // Convert the database file to a string.
 285             String exportFileString = exportFile.toString();
 286
 287             // Create strings for the temporary database files.
 288             String journalFileString = exportFileString + "-journal";
 289
 290             // Get `Files` for the temporary database files.
 291             File journalFile = new File(journalFileString);
 292
 293             // Delete the Journal file if it exists.
 294             if (journalFile.exists()) {
 295                 //noinspection ResultOfMethodCallIgnored
 296                 journalFile.delete();
 297             }
 298
 299             // Export successful.
 300             return EXPORT_SUCCESSFUL;
 301         } catch (Exception exception) {
 302             // Return the export error.
 303             return exception.toString();
 304         }
 305     }
 306
 307     public String importUnencrypted(File importFile, Context context){
 308         try {
 309             // Create a temporary import file string.
 310             String temporaryImportFileString = context.getCacheDir() + "/" + "temporary_import_file";
 311
 312             // Get a handle for a temporary import file.
 313             File temporaryImportFile = new File(temporaryImportFileString);
 314
 315             // Delete the temporary import file if it already exists.
 316             if (temporaryImportFile.exists()) {
 317                 //noinspection ResultOfMethodCallIgnored
 318                 temporaryImportFile.delete();
 319             }
 320
 321             // Create input and output streams.
 322             InputStream importFileInputStream = new FileInputStream(importFile);
 323             OutputStream temporaryImportFileOutputStream = new FileOutputStream(temporaryImportFile);
 324
 325             // Create a byte array.
 326             byte[] transferByteArray = new byte[1024];
 327
 328             // Create an integer to track the number of bytes read.
 329             int bytesRead;
 330
 331             // Copy the import file to the temporary import file.  Once API >= 26 `Files.copy` can be used instead.
 332             while ((bytesRead = importFileInputStream.read(transferByteArray)) > 0) {
 333                 temporaryImportFileOutputStream.write(transferByteArray, 0, bytesRead);
 334             }
 335
 336             // Close the file streams.
 337             importFileInputStream.close();
 338             temporaryImportFileOutputStream.close();
 339
 340
 341             // Get a handle for the shared preference.
 342             SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
 343
 344             // Open the import database.  Once API >= 27 the file can be opened directly without using the string.
 345             SQLiteDatabase importDatabase = SQLiteDatabase.openDatabase(temporaryImportFileString, null, SQLiteDatabase.OPEN_READWRITE);
 346
 347             // Get the database version.
 348             int importDatabaseVersion = importDatabase.getVersion();
 349
 350             // Upgrade the database if needed.
 351             if (importDatabaseVersion < SCHEMA_VERSION) {
 352                 switch (importDatabaseVersion){
 353                     // Upgrade from schema version 1.
 354                     case 1:
 355                         // Add the download with external app preference.
 356                         importDatabase.execSQL("ALTER TABLE " + PREFERENCES_TABLE + " ADD COLUMN " + DOWNLOAD_WITH_EXTERNAL_APP + " BOOLEAN");
 357
 358                         // Get the current setting for downloading with an external app.
 359                         boolean downloadWithExternalApp = sharedPreferences.getBoolean("download_with_external_app", false);
 360
 361                         // Set the download with external app preference to the current default.
 362                         if (downloadWithExternalApp) {
 363                             importDatabase.execSQL("UPDATE " + PREFERENCES_TABLE + " SET " + DOWNLOAD_WITH_EXTERNAL_APP + " = " + 1);
 364                         } else {
 365                             importDatabase.execSQL("UPDATE " + PREFERENCES_TABLE + " SET " + DOWNLOAD_WITH_EXTERNAL_APP + " = " + 0);
 366                         }
 367
 368                     // Upgrade from schema version 2.
 369                     case 2:
 370                         // Once the SQLite version is >= 3.25.0 `ALTER TABLE RENAME COLUMN` can be used.  https://www.sqlite.org/lang_altertable.html  https://www.sqlite.org/changes.html
 371                         // https://developer.android.com/reference/android/database/sqlite/package-summary
 372                         // In the meantime, a new column must be created with the new name.  There is no need to delete the old column on the temporary import database.
 373
 374                         // Get a cursor with the current `default_font_size` value.
 375                         Cursor importDatabasePreferenceCursor = importDatabase.rawQuery("SELECT default_font_size FROM " + PREFERENCES_TABLE, null);
 376
 377                         // Move to the beginning fo the cursor.
 378                         importDatabasePreferenceCursor.moveToFirst();
 379
 380                         // Get the current value in `default_font_size`.
 381                         String fontSize = importDatabasePreferenceCursor.getString(importDatabasePreferenceCursor.getColumnIndex("default_font_size"));
 382
 383                         // Close the cursor.
 384                         importDatabasePreferenceCursor.close();
 385
 386                         // Create a new column named `font_size`.
 387                         importDatabase.execSQL("ALTER TABLE " + PREFERENCES_TABLE + " ADD COLUMN " + FONT_SIZE + " TEXT");
 388
 389                         // Place the font size string in the new column.
 390                         importDatabase.execSQL("UPDATE " + PREFERENCES_TABLE + " SET " + FONT_SIZE + " = " + fontSize);
 391                 }
 392             }
 393
 394             // Get a cursor for the domains table.
 395             Cursor importDomainsCursor = importDatabase.rawQuery("SELECT * FROM " + DomainsDatabaseHelper.DOMAINS_TABLE + " ORDER BY " + DomainsDatabaseHelper.DOMAIN_NAME + " ASC", null);
 396
 397             // Delete the current domains database.
 398             context.deleteDatabase(DomainsDatabaseHelper.DOMAINS_DATABASE);
 399
 400             // Create a new domains database.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
 401             DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(context, null, null, 0);
 402
 403             // Move to the first domain.
 404             importDomainsCursor.moveToFirst();
 405
 406             // Copy the data from the import domains cursor into the domains database.
 407             for (int i = 0; i < importDomainsCursor.getCount(); i++) {
 408                 // Extract the record from the cursor and store the data in a ContentValues.
 409                 ContentValues domainsContentValues = new ContentValues();
 410                 domainsContentValues.put(DomainsDatabaseHelper.DOMAIN_NAME, importDomainsCursor.getString(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME)));
 411                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_JAVASCRIPT, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)));
 412                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)));
 413                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)));
 414                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_DOM_STORAGE, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)));
 415                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_FORM_DATA, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)));
 416                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_EASYLIST, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYLIST)));
 417                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_EASYPRIVACY, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)));
 418                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST,
 419                         importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)));
 420                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST,
 421                         importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)));
 422                 domainsContentValues.put(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)));
 423                 domainsContentValues.put(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS,
 424                         importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)));
 425                 domainsContentValues.put(DomainsDatabaseHelper.USER_AGENT, importDomainsCursor.getString(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT)));
 426                 domainsContentValues.put(DomainsDatabaseHelper.FONT_SIZE, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE)));
 427                 domainsContentValues.put(DomainsDatabaseHelper.SWIPE_TO_REFRESH, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SWIPE_TO_REFRESH)));
 428                 domainsContentValues.put(DomainsDatabaseHelper.NIGHT_MODE, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.NIGHT_MODE)));
 429                 domainsContentValues.put(DomainsDatabaseHelper.DISPLAY_IMAGES, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES)));
 430                 domainsContentValues.put(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE, importDomainsCursor.getInt(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)));
 431                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME, importDomainsCursor.getString(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME)));
 432                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION, importDomainsCursor.getString(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATION)));
 433                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT,
 434                         importDomainsCursor.getString(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_ORGANIZATIONAL_UNIT)));
 435                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME, importDomainsCursor.getString(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_COMMON_NAME)));
 436                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION, importDomainsCursor.getString(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATION)));
 437                 domainsContentValues.put(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT,
 438                         importDomainsCursor.getString(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_BY_ORGANIZATIONAL_UNIT)));
 439                 domainsContentValues.put(DomainsDatabaseHelper.SSL_START_DATE, importDomainsCursor.getLong(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_START_DATE)));
 440                 domainsContentValues.put(DomainsDatabaseHelper.SSL_END_DATE, importDomainsCursor.getLong(importDomainsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_END_DATE)));
 441
 442                 // Insert the record into the export database.
 443                 domainsDatabaseHelper.addDomain(domainsContentValues);
 444
 445                 // Advance to the next record.
 446                 importDomainsCursor.moveToNext();
 447             }
 448
 449             // Close the domains cursor.
 450             importDomainsCursor.close();
 451
 452             // Close the domains database.
 453             domainsDatabaseHelper.close();
 454
 455
 456             // Get a cursor for the bookmarks table.
 457             Cursor importBookmarksCursor = importDatabase.rawQuery("SELECT * FROM " + BookmarksDatabaseHelper.BOOKMARKS_TABLE, null);
 458
 459             // Delete the current bookmarks database.
 460             context.deleteDatabase(BookmarksDatabaseHelper.BOOKMARKS_DATABASE);
 461
 462             // Create a new bookmarks database.  The `0` specifies the database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
 463             BookmarksDatabaseHelper bookmarksDatabaseHelper = new BookmarksDatabaseHelper(context, null, null, 0);
 464
 465             // Move to the first bookmark.
 466             importBookmarksCursor.moveToFirst();
 467
 468             // Copy the data from the import bookmarks cursor into the bookmarks database.
 469             for (int i = 0; i < importBookmarksCursor.getCount(); i++) {
 470                 // Extract the record from the cursor and store the data in a ContentValues.
 471                 ContentValues bookmarksContentValues = new ContentValues();
 472                 bookmarksContentValues.put(BookmarksDatabaseHelper.BOOKMARK_NAME, importBookmarksCursor.getString(importBookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME)));
 473                 bookmarksContentValues.put(BookmarksDatabaseHelper.BOOKMARK_URL, importBookmarksCursor.getString(importBookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
 474                 bookmarksContentValues.put(BookmarksDatabaseHelper.PARENT_FOLDER, importBookmarksCursor.getString(importBookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.PARENT_FOLDER)));
 475                 bookmarksContentValues.put(BookmarksDatabaseHelper.DISPLAY_ORDER, importBookmarksCursor.getInt(importBookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)));
 476                 bookmarksContentValues.put(BookmarksDatabaseHelper.IS_FOLDER, importBookmarksCursor.getInt(importBookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)));
 477                 bookmarksContentValues.put(BookmarksDatabaseHelper.FAVORITE_ICON, importBookmarksCursor.getBlob(importBookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON)));
 478
 479                 // Insert the record into the export database.
 480                 bookmarksDatabaseHelper.createBookmark(bookmarksContentValues);
 481
 482                 // Advance to the next record.
 483                 importBookmarksCursor.moveToNext();
 484             }
 485
 486             // Close the bookmarks cursor.
 487             importBookmarksCursor.close();
 488
 489             // Close the bookmarks database.
 490             bookmarksDatabaseHelper.close();
 491
 492
 493             // Get a cursor for the bookmarks table.
 494             Cursor importPreferencesCursor = importDatabase.rawQuery("SELECT * FROM " + PREFERENCES_TABLE, null);
 495
 496             // Move to the first preference.
 497             importPreferencesCursor.moveToFirst();
 498
 499             // Import the preference data.
 500             sharedPreferences.edit()
 501                     .putBoolean(JAVASCRIPT, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(JAVASCRIPT)) == 1)
 502                     .putBoolean(FIRST_PARTY_COOKIES, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(FIRST_PARTY_COOKIES)) == 1)
 503                     .putBoolean(THIRD_PARTY_COOKIES, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(THIRD_PARTY_COOKIES)) == 1)
 504                     .putBoolean(DOM_STORAGE, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(DOM_STORAGE)) == 1)
 505                     // Save form data can be removed once the minimum API >= 26.
 506                     .putBoolean(SAVE_FORM_DATA, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(SAVE_FORM_DATA)) == 1)
 507                     .putString(USER_AGENT, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(USER_AGENT)))
 508                     .putString(CUSTOM_USER_AGENT, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(CUSTOM_USER_AGENT)))
 509                     .putBoolean(INCOGNITO_MODE, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(INCOGNITO_MODE)) == 1)
 510                     .putBoolean(DO_NOT_TRACK, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(DO_NOT_TRACK)) == 1)
 511                     .putBoolean(ALLOW_SCREENSHOTS, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(ALLOW_SCREENSHOTS)) == 1)
 512                     .putBoolean(EASYLIST, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(EASYLIST)) == 1)
 513                     .putBoolean(EASYPRIVACY, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(EASYPRIVACY)) == 1)
 514                     .putBoolean(FANBOYS_ANNOYANCE_LIST, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(FANBOYS_ANNOYANCE_LIST)) == 1)
 515                     .putBoolean(FANBOYS_SOCIAL_BLOCKING_LIST, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(FANBOYS_SOCIAL_BLOCKING_LIST)) == 1)
 516                     .putBoolean(ULTRAPRIVACY, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(ULTRAPRIVACY)) == 1)
 517                     .putBoolean(BLOCK_ALL_THIRD_PARTY_REQUESTS, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(BLOCK_ALL_THIRD_PARTY_REQUESTS)) == 1)
 518                     .putBoolean(PROXY_THROUGH_ORBOT, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(PROXY_THROUGH_ORBOT)) == 1)
 519                     .putString(TOR_HOMEPAGE, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(TOR_HOMEPAGE)))
 520                     .putString(TOR_SEARCH, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(TOR_SEARCH)))
 521                     .putString(TOR_SEARCH_CUSTOM_URL, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(TOR_SEARCH_CUSTOM_URL)))
 522                     .putString(SEARCH, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(SEARCH)))
 523                     .putString(SEARCH_CUSTOM_URL, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(SEARCH_CUSTOM_URL)))
 524                     .putBoolean(FULL_SCREEN_BROWSING_MODE, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(FULL_SCREEN_BROWSING_MODE)) == 1)
 525                     .putBoolean(HIDE_SYSTEM_BARS, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(HIDE_SYSTEM_BARS)) == 1)
 526                     .putBoolean(TRANSLUCENT_NAVIGATION_BAR, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(TRANSLUCENT_NAVIGATION_BAR)) == 1)
 527                     .putBoolean(CLEAR_EVERYTHING, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(CLEAR_EVERYTHING)) == 1)
 528                     .putBoolean(CLEAR_COOKIES, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(CLEAR_COOKIES)) == 1)
 529                     .putBoolean(CLEAR_DOM_STORAGE, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(CLEAR_DOM_STORAGE)) == 1)
 530                     // Clear form data can be removed once the minimum API >= 26.
 531                     .putBoolean(CLEAR_FORM_DATA, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(CLEAR_FORM_DATA)) == 1)
 532                     .putBoolean(CLEAR_CACHE, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(CLEAR_CACHE)) == 1)
 533                     .putString(HOMEPAGE, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(HOMEPAGE)))
 534                     .putString(FONT_SIZE, importPreferencesCursor.getString(importPreferencesCursor.getColumnIndex(FONT_SIZE)))
 535                     .putBoolean(SWIPE_TO_REFRESH, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(SWIPE_TO_REFRESH)) == 1)
 536                     .putBoolean(DOWNLOAD_WITH_EXTERNAL_APP, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(DOWNLOAD_WITH_EXTERNAL_APP)) == 1)
 537                     .putBoolean(DISPLAY_ADDITIONAL_APP_BAR_ICONS, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(DISPLAY_ADDITIONAL_APP_BAR_ICONS)) == 1)
 538                     .putBoolean(DARK_THEME, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(DARK_THEME)) == 1)
 539                     .putBoolean(NIGHT_MODE, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(NIGHT_MODE)) == 1)
 540                     .putBoolean(DISPLAY_WEBPAGE_IMAGES, importPreferencesCursor.getInt(importPreferencesCursor.getColumnIndex(DISPLAY_WEBPAGE_IMAGES)) == 1)
 541                     .apply();
 542
 543             // Close the preferences cursor.
 544             importPreferencesCursor.close();
 545
 546
 547             // Close the import database.
 548             importDatabase.close();
 549
 550             // Create strings for the temporary database files.
 551             String shmFileString = temporaryImportFileString + "-shm";
 552             String walFileString = temporaryImportFileString + "-wal";
 553             String journalFileString = temporaryImportFileString + "-journal";
 554
 555             // Get `Files` for the temporary database files.
 556             File shmFile = new File(shmFileString);
 557             File walFile = new File(walFileString);
 558             File journalFile = new File(journalFileString);
 559
 560             // Delete the Shared Memory file if it exists.
 561             if (shmFile.exists()) {
 562                 //noinspection ResultOfMethodCallIgnored
 563                 shmFile.delete();
 564             }
 565
 566             // Delete the Write Ahead Log file if it exists.
 567             if (walFile.exists()) {
 568                 //noinspection ResultOfMethodCallIgnored
 569                 walFile.delete();
 570             }
 571
 572             // Delete the Journal file if it exists.
 573             if (journalFile.exists()) {
 574                 //noinspection ResultOfMethodCallIgnored
 575                 journalFile.delete();
 576             }
 577
 578             // Delete the temporary import file.
 579             //noinspection ResultOfMethodCallIgnored
 580             temporaryImportFile.delete();
 581
 582             // Import successful.
 583             return IMPORT_SUCCESSFUL;
 584         } catch (Exception exception) {
 585             // Return the import error.
 586             return exception.toString();
 587         }
 588     }
 589 }