privacybrowser/fragments/AboutVersionFragment.java

   1 /*
   2  * Copyright © 2016-2020 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.app.Activity;
  24 import android.app.ActivityManager;
  25 import android.content.ClipData;
  26 import android.content.ClipboardManager;
  27 import android.content.Context;
  28 import android.content.Intent;
  29 import android.content.pm.PackageInfo;
  30 import android.content.pm.PackageManager;
  31 import android.content.pm.Signature;
  32 import android.content.res.Configuration;
  33 import android.os.Build;
  34 import android.os.Bundle;
  35 import android.os.Handler;
  36 import android.text.SpannableStringBuilder;
  37 import android.text.Spanned;
  38 import android.text.style.ForegroundColorSpan;
  39 import android.view.LayoutInflater;
  40 import android.view.Menu;
  41 import android.view.MenuInflater;
  42 import android.view.MenuItem;
  43 import android.view.View;
  44 import android.view.ViewGroup;
  45 import android.webkit.WebView;
  46 import android.widget.TextView;
  47
  48 import com.google.android.material.snackbar.Snackbar;
  49 import com.stoutner.privacybrowser.BuildConfig;
  50 import com.stoutner.privacybrowser.R;
  51 import com.stoutner.privacybrowser.dialogs.SaveDialog;
  52
  53 import java.io.ByteArrayInputStream;
  54 import java.io.InputStream;
  55 import java.math.BigInteger;
  56 import java.security.Principal;
  57 import java.security.cert.CertificateException;
  58 import java.security.cert.CertificateFactory;
  59 import java.security.cert.X509Certificate;
  60 import java.text.DateFormat;
  61 import java.text.NumberFormat;
  62 import java.util.Date;
  63
  64 import androidx.annotation.NonNull;
  65 import androidx.fragment.app.DialogFragment;
  66 import androidx.fragment.app.Fragment;
  67 import androidx.webkit.WebViewCompat;
  68
  69 public class AboutVersionFragment extends Fragment {
  70     // Declare the class constants.
  71     final static String BLOCKLIST_VERSIONS = "blocklist_versions";
  72     final long MEBIBYTE = 1048576;
  73
  74     // Declare the class variables.
  75     private boolean updateMemoryUsageBoolean = true;
  76     private String[] blocklistVersions;
  77     private View aboutVersionLayout;
  78     private String appConsumedMemoryLabel;
  79     private String appAvailableMemoryLabel;
  80     private String appTotalMemoryLabel;
  81     private String appMaximumMemoryLabel;
  82     private String systemConsumedMemoryLabel;
  83     private String systemAvailableMemoryLabel;
  84     private String systemTotalMemoryLabel;
  85     private Runtime runtime;
  86     private ActivityManager activityManager;
  87     private ActivityManager.MemoryInfo memoryInfo;
  88     private NumberFormat numberFormat;
  89     private ForegroundColorSpan blueColorSpan;
  90
  91     // Declare the class views.
  92     private TextView privacyBrowserTextView;
  93     private TextView versionTextView;
  94     private TextView hardwareTextView;
  95     private TextView brandTextView;
  96     private TextView manufacturerTextView;
  97     private TextView modelTextView;
  98     private TextView deviceTextView;
  99     private TextView bootloaderTextView;
 100     private TextView radioTextView;
 101     private TextView softwareTextView;
 102     private TextView androidTextView;
 103     private TextView securityPatchTextView;
 104     private TextView buildTextView;
 105     private TextView webViewProviderTextView;
 106     private TextView webViewVersionTextView;
 107     private TextView orbotTextView;
 108     private TextView i2pTextView;
 109     private TextView openKeychainTextView;
 110     private TextView memoryUsageTextView;
 111     private TextView appConsumedMemoryTextView;
 112     private TextView appAvailableMemoryTextView;
 113     private TextView appTotalMemoryTextView;
 114     private TextView appMaximumMemoryTextView;
 115     private TextView systemConsumedMemoryTextView;
 116     private TextView systemAvailableMemoryTextView;
 117     private TextView systemTotalMemoryTextView;
 118     private TextView blocklistsTextView;
 119     private TextView easyListTextView;
 120     private TextView easyPrivacyTextView;
 121     private TextView fanboyAnnoyanceTextView;
 122     private TextView fanboySocialTextView;
 123     private TextView ultraListTextView;
 124     private TextView ultraPrivacyTextView;
 125     private TextView packageSignatureTextView;
 126     private TextView certificateIssuerDnTextView;
 127     private TextView certificateSubjectDnTextView;
 128     private TextView certificateStartDateTextView;
 129     private TextView certificateEndDateTextView;
 130     private TextView certificateVersionTextView;
 131     private TextView certificateSerialNumberTextView;
 132     private TextView certificateSignatureAlgorithmTextView;
 133
 134     public static AboutVersionFragment createTab(String[] blocklistVersions) {
 135         // Create an arguments bundle.
 136         Bundle argumentsBundle = new Bundle();
 137
 138         // Store the arguments in the bundle.
 139         argumentsBundle.putStringArray(BLOCKLIST_VERSIONS, blocklistVersions);
 140
 141         // Create a new instance of the tab fragment.
 142         AboutVersionFragment aboutVersionFragment = new AboutVersionFragment();
 143
 144         // Add the arguments bundle to the fragment.
 145         aboutVersionFragment.setArguments(argumentsBundle);
 146
 147         // Return the new fragment.
 148         return aboutVersionFragment;
 149     }
 150
 151     @Override
 152     public void onCreate(Bundle savedInstanceState) {
 153         // Run the default commands.
 154         super.onCreate(savedInstanceState);
 155
 156         // Get a handle for the arguments.
 157         Bundle arguments = getArguments();
 158
 159         // Remove the incorrect lint warning below that the arguments might be null.
 160         assert arguments != null;
 161
 162         // Store the arguments in class variables.
 163         blocklistVersions = arguments.getStringArray(BLOCKLIST_VERSIONS);
 164
 165         // Enable the options menu for this fragment.
 166         setHasOptionsMenu(true);
 167     }
 168
 169     @Override
 170     public View onCreateView(@NonNull LayoutInflater layoutInflater, ViewGroup container, Bundle savedInstanceState) {
 171         // Get a handle for the context.
 172         Context context = getContext();
 173
 174         // Remove the incorrect lint warning below that the context might be null.
 175         assert context != null;
 176
 177         // Get the current theme status.
 178         int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 179
 180         // Inflate the layout.  Setting false at the end of inflater.inflate does not attach the inflated layout as a child of container.  The fragment will take care of attaching the root automatically.
 181         aboutVersionLayout = layoutInflater.inflate(R.layout.about_version, container, false);
 182
 183         // Get handles for the views.
 184         privacyBrowserTextView = aboutVersionLayout.findViewById(R.id.privacy_browser_textview);
 185         versionTextView = aboutVersionLayout.findViewById(R.id.version);
 186         hardwareTextView = aboutVersionLayout.findViewById(R.id.hardware);
 187         brandTextView = aboutVersionLayout.findViewById(R.id.brand);
 188         manufacturerTextView = aboutVersionLayout.findViewById(R.id.manufacturer);
 189         modelTextView = aboutVersionLayout.findViewById(R.id.model);
 190         deviceTextView = aboutVersionLayout.findViewById(R.id.device);
 191         bootloaderTextView = aboutVersionLayout.findViewById(R.id.bootloader);
 192         radioTextView = aboutVersionLayout.findViewById(R.id.radio);
 193         softwareTextView = aboutVersionLayout.findViewById(R.id.software);
 194         androidTextView = aboutVersionLayout.findViewById(R.id.android);
 195         securityPatchTextView = aboutVersionLayout.findViewById(R.id.security_patch);
 196         buildTextView = aboutVersionLayout.findViewById(R.id.build);
 197         webViewProviderTextView = aboutVersionLayout.findViewById(R.id.webview_provider);
 198         webViewVersionTextView = aboutVersionLayout.findViewById(R.id.webview_version);
 199         orbotTextView = aboutVersionLayout.findViewById(R.id.orbot);
 200         i2pTextView = aboutVersionLayout.findViewById(R.id.i2p);
 201         openKeychainTextView = aboutVersionLayout.findViewById(R.id.open_keychain);
 202         memoryUsageTextView = aboutVersionLayout.findViewById(R.id.memory_usage);
 203         appConsumedMemoryTextView = aboutVersionLayout.findViewById(R.id.app_consumed_memory);
 204         appAvailableMemoryTextView = aboutVersionLayout.findViewById(R.id.app_available_memory);
 205         appTotalMemoryTextView = aboutVersionLayout.findViewById(R.id.app_total_memory);
 206         appMaximumMemoryTextView = aboutVersionLayout.findViewById(R.id.app_maximum_memory);
 207         systemConsumedMemoryTextView = aboutVersionLayout.findViewById(R.id.system_consumed_memory);
 208         systemAvailableMemoryTextView = aboutVersionLayout.findViewById(R.id.system_available_memory);
 209         systemTotalMemoryTextView = aboutVersionLayout.findViewById(R.id.system_total_memory);
 210         blocklistsTextView = aboutVersionLayout.findViewById(R.id.blocklists);
 211         easyListTextView = aboutVersionLayout.findViewById(R.id.easylist);
 212         easyPrivacyTextView = aboutVersionLayout.findViewById(R.id.easyprivacy);
 213         fanboyAnnoyanceTextView = aboutVersionLayout.findViewById(R.id.fanboy_annoyance);
 214         fanboySocialTextView = aboutVersionLayout.findViewById(R.id.fanboy_social);
 215         ultraListTextView = aboutVersionLayout.findViewById(R.id.ultralist);
 216         ultraPrivacyTextView = aboutVersionLayout.findViewById(R.id.ultraprivacy);
 217         packageSignatureTextView = aboutVersionLayout.findViewById(R.id.package_signature);
 218         certificateIssuerDnTextView = aboutVersionLayout.findViewById(R.id.certificate_issuer_dn);
 219         certificateSubjectDnTextView = aboutVersionLayout.findViewById(R.id.certificate_subject_dn);
 220         certificateStartDateTextView = aboutVersionLayout.findViewById(R.id.certificate_start_date);
 221         certificateEndDateTextView = aboutVersionLayout.findViewById(R.id.certificate_end_date);
 222         certificateVersionTextView = aboutVersionLayout.findViewById(R.id.certificate_version);
 223         certificateSerialNumberTextView = aboutVersionLayout.findViewById(R.id.certificate_serial_number);
 224         certificateSignatureAlgorithmTextView = aboutVersionLayout.findViewById(R.id.certificate_signature_algorithm);
 225
 226         // Setup the labels.
 227         String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + BuildConfig.VERSION_CODE + ")";
 228         String brandLabel = getString(R.string.brand) + "  ";
 229         String manufacturerLabel = getString(R.string.manufacturer) + "  ";
 230         String modelLabel = getString(R.string.model) + "  ";
 231         String deviceLabel = getString(R.string.device) + "  ";
 232         String bootloaderLabel = getString(R.string.bootloader) + "  ";
 233         String androidLabel = getString(R.string.android) + "  ";
 234         String buildLabel = getString(R.string.build) + "  ";
 235         String webViewVersionLabel = getString(R.string.webview_version) + "  ";
 236         appConsumedMemoryLabel = getString(R.string.app_consumed_memory) + "  ";
 237         appAvailableMemoryLabel = getString(R.string.app_available_memory) + "  ";
 238         appTotalMemoryLabel = getString(R.string.app_total_memory) + "  ";
 239         appMaximumMemoryLabel = getString(R.string.app_maximum_memory) + "  ";
 240         systemConsumedMemoryLabel = getString(R.string.system_consumed_memory) + "  ";
 241         systemAvailableMemoryLabel = getString(R.string.system_available_memory) + "  ";
 242         systemTotalMemoryLabel = getString(R.string.system_total_memory) + "  ";
 243         String easyListLabel = getString(R.string.easylist_label) + "  ";
 244         String easyPrivacyLabel = getString(R.string.easyprivacy_label) + "  ";
 245         String fanboyAnnoyanceLabel = getString(R.string.fanboy_annoyance_label) + "  ";
 246         String fanboySocialLabel = getString(R.string.fanboy_social_label) + "  ";
 247         String ultraListLabel = getString(R.string.ultralist_label) + "  ";
 248         String ultraPrivacyLabel = getString(R.string.ultraprivacy_label) + "  ";
 249         String issuerDNLabel = getString(R.string.issuer_dn) + "  ";
 250         String subjectDNLabel = getString(R.string.subject_dn) + "  ";
 251         String startDateLabel = getString(R.string.start_date) + "  ";
 252         String endDateLabel = getString(R.string.end_date) + "  ";
 253         String certificateVersionLabel = getString(R.string.certificate_version) + "  ";
 254         String serialNumberLabel = getString(R.string.serial_number) + "  ";
 255         String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + "  ";
 256
 257         // The WebView layout is only used to get the default user agent from `bare_webview`.  It is not used to render content on the screen.
 258         // Once the minimum API >= 26 this can be accomplished with the WebView package info.
 259         View webViewLayout = layoutInflater.inflate(R.layout.bare_webview, container, false);
 260         WebView tabLayoutWebView = webViewLayout.findViewById(R.id.bare_webview);
 261         String userAgentString =  tabLayoutWebView.getSettings().getUserAgentString();
 262
 263         // Get the device's information and store it in strings.
 264         String brand = Build.BRAND;
 265         String manufacturer = Build.MANUFACTURER;
 266         String model = Build.MODEL;
 267         String device = Build.DEVICE;
 268         String bootloader = Build.BOOTLOADER;
 269         String radio = Build.getRadioVersion();
 270         String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Build.VERSION.SDK_INT + ")";
 271         String build = Build.DISPLAY;
 272         // Select the substring that begins after `Chrome/` and goes until the next ` `.
 273         String webView = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
 274
 275         // Get the Orbot version name if Orbot is installed.
 276         String orbot;
 277         try {
 278             // Store the version name.
 279             orbot = context.getPackageManager().getPackageInfo("org.torproject.android", 0).versionName;
 280         } catch (PackageManager.NameNotFoundException exception) {  // Orbot is not installed.
 281             orbot = "";
 282         }
 283
 284         // Get the I2P version name if I2P is installed.
 285         String i2p;
 286         try {
 287             // Store the version name.
 288             i2p = context.getPackageManager().getPackageInfo("net.i2p.android.router", 0).versionName;
 289         } catch (PackageManager.NameNotFoundException exception) {  // I2P is not installed.
 290             i2p = "";
 291         }
 292
 293         // Get the OpenKeychain version name if it is installed.
 294         String openKeychain;
 295         try {
 296             // Store the version name.
 297             openKeychain = context.getPackageManager().getPackageInfo("org.sufficientlysecure.keychain", 0).versionName;
 298         } catch (PackageManager.NameNotFoundException exception) {  // OpenKeychain is not installed.
 299             openKeychain = "";
 300         }
 301
 302         // Create a spannable string builder for the hardware and software text views that needs multiple colors of text.
 303         SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
 304         SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
 305         SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
 306         SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
 307         SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
 308         SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
 309         SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
 310         SpannableStringBuilder webViewVersionStringBuilder = new SpannableStringBuilder(webViewVersionLabel + webView);
 311         SpannableStringBuilder easyListStringBuilder = new SpannableStringBuilder(easyListLabel + blocklistVersions[0]);
 312         SpannableStringBuilder easyPrivacyStringBuilder = new SpannableStringBuilder(easyPrivacyLabel + blocklistVersions[1]);
 313         SpannableStringBuilder fanboyAnnoyanceStringBuilder = new SpannableStringBuilder(fanboyAnnoyanceLabel + blocklistVersions[2]);
 314         SpannableStringBuilder fanboySocialStringBuilder = new SpannableStringBuilder(fanboySocialLabel + blocklistVersions[3]);
 315         SpannableStringBuilder ultraListStringBuilder = new SpannableStringBuilder(ultraListLabel + blocklistVersions[4]);
 316         SpannableStringBuilder ultraPrivacyStringBuilder = new SpannableStringBuilder(ultraPrivacyLabel + blocklistVersions[5]);
 317
 318         // Set the blue color span according to the theme.  The deprecated `getResources()` must be used until the minimum API >= 23.
 319         if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
 320             blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
 321         } else {
 322             blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.violet_700));
 323         }
 324
 325         // Setup the spans to display the device information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 326         brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 327         manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 328         modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 329         deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 330         bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 331         androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 332         buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 333         webViewVersionStringBuilder.setSpan(blueColorSpan, webViewVersionLabel.length(), webViewVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 334         easyListStringBuilder.setSpan(blueColorSpan, easyListLabel.length(), easyListStringBuilder.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
 335         easyPrivacyStringBuilder.setSpan(blueColorSpan, easyPrivacyLabel.length(), easyPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 336         fanboyAnnoyanceStringBuilder.setSpan(blueColorSpan, fanboyAnnoyanceLabel.length(), fanboyAnnoyanceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 337         fanboySocialStringBuilder.setSpan(blueColorSpan, fanboySocialLabel.length(), fanboySocialStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 338         ultraListStringBuilder.setSpan(blueColorSpan, ultraListLabel.length(), ultraListStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 339         ultraPrivacyStringBuilder.setSpan(blueColorSpan, ultraPrivacyLabel.length(), ultraPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 340
 341         // Display the strings in the text boxes.
 342         versionTextView.setText(version);
 343         brandTextView.setText(brandStringBuilder);
 344         manufacturerTextView.setText(manufacturerStringBuilder);
 345         modelTextView.setText(modelStringBuilder);
 346         deviceTextView.setText(deviceStringBuilder);
 347         bootloaderTextView.setText(bootloaderStringBuilder);
 348         androidTextView.setText(androidStringBuilder);
 349         buildTextView.setText(buildStringBuilder);
 350         webViewVersionTextView.setText(webViewVersionStringBuilder);
 351         easyListTextView.setText(easyListStringBuilder);
 352         easyPrivacyTextView.setText(easyPrivacyStringBuilder);
 353         fanboyAnnoyanceTextView.setText(fanboyAnnoyanceStringBuilder);
 354         fanboySocialTextView.setText(fanboySocialStringBuilder);
 355         ultraListTextView.setText(ultraListStringBuilder);
 356         ultraPrivacyTextView.setText(ultraPrivacyStringBuilder);
 357
 358         // Only populate the radio text view if there is a radio in the device.
 359         // Null must be checked because some Samsung tablets report a null value for the radio instead of an empty string.  Grrrr.  <https://redmine.stoutner.com/issues/701>
 360         if ((radio != null) && !radio.isEmpty()) {
 361             String radioLabel = getString(R.string.radio) + "  ";
 362             SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
 363             radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 364             radioTextView.setText(radioStringBuilder);
 365         } else {  // This device does not have a radio.
 366             radioTextView.setVisibility(View.GONE);
 367         }
 368
 369         // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
 370         if (Build.VERSION.SDK_INT >= 23) {
 371             String securityPatchLabel = getString(R.string.security_patch) + "  ";
 372             String securityPatch = Build.VERSION.SECURITY_PATCH;
 373             SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
 374             securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 375             securityPatchTextView.setText(securityPatchStringBuilder);
 376         } else {  // The API < 23.
 377             // Hide the security patch text view.
 378             securityPatchTextView.setVisibility(View.GONE);
 379         }
 380
 381         // Only populate the WebView provider if the SDK >= 21.
 382         if (Build.VERSION.SDK_INT >= 21) {
 383             // Create the WebView provider label.
 384             String webViewProviderLabel = getString(R.string.webview_provider) + "  ";
 385
 386             // Get the current WebView package info.
 387             PackageInfo webViewPackageInfo = WebViewCompat.getCurrentWebViewPackage(context);
 388
 389             // Remove the warning below that the package info might be null.
 390             assert webViewPackageInfo != null;
 391
 392             // Get the WebView provider name.
 393             String webViewPackageName = webViewPackageInfo.packageName;
 394
 395             // Create the spannable string builder.
 396             SpannableStringBuilder webViewProviderStringBuilder = new SpannableStringBuilder(webViewProviderLabel + webViewPackageName);
 397
 398             // Apply the coloration.
 399             webViewProviderStringBuilder.setSpan(blueColorSpan, webViewProviderLabel.length(), webViewProviderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 400
 401             // Display the WebView provider.
 402             webViewProviderTextView.setText(webViewProviderStringBuilder);
 403         } else {  // The API < 21.
 404             // Hide the WebView provider text view.
 405             webViewProviderTextView.setVisibility(View.GONE);
 406         }
 407
 408         // Only populate the Orbot text view if it is installed.
 409         if (!orbot.isEmpty()) {
 410             String orbotLabel = getString(R.string.orbot) + "  ";
 411             SpannableStringBuilder orbotStringBuilder = new SpannableStringBuilder(orbotLabel + orbot);
 412             orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length(), orbotStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 413             orbotTextView.setText(orbotStringBuilder);
 414         } else {  // Orbot is not installed.
 415             orbotTextView.setVisibility(View.GONE);
 416         }
 417
 418         // Only populate the I2P text view if it is installed.
 419         if (!i2p.isEmpty()) {
 420             String i2pLabel = getString(R.string.i2p)  + "  ";
 421             SpannableStringBuilder i2pStringBuilder = new SpannableStringBuilder(i2pLabel + i2p);
 422             i2pStringBuilder.setSpan(blueColorSpan, i2pLabel.length(), i2pStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 423             i2pTextView.setText(i2pStringBuilder);
 424         } else {  // I2P is not installed.
 425             i2pTextView.setVisibility(View.GONE);
 426         }
 427
 428         // Only populate the OpenKeychain text view if it is installed.
 429         if (!openKeychain.isEmpty()) {
 430             String openKeychainLabel = getString(R.string.openkeychain) + "  ";
 431             SpannableStringBuilder openKeychainStringBuilder = new SpannableStringBuilder(openKeychainLabel + openKeychain);
 432             openKeychainStringBuilder.setSpan(blueColorSpan, openKeychainLabel.length(), openKeychainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 433             openKeychainTextView.setText(openKeychainStringBuilder);
 434         } else {  //OpenKeychain is not installed.
 435             openKeychainTextView.setVisibility(View.GONE);
 436         }
 437
 438         // Display the package signature.
 439         try {
 440             // Get the first package signature.  Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
 441             @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = context.getPackageManager().getPackageInfo(context.getPackageName(),
 442                     PackageManager.GET_SIGNATURES).signatures[0];
 443
 444             // Convert the signature to a byte array input stream.
 445             InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
 446
 447             // Display the certificate information on the screen.
 448             try {
 449                 // Instantiate a `CertificateFactory`.
 450                 CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
 451
 452                 // Generate an `X509Certificate`.
 453                 X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
 454
 455                 // Store the individual sections of the certificate that we are interested in.
 456                 Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
 457                 Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
 458                 Date startDate = x509Certificate.getNotBefore();
 459                 Date endDate = x509Certificate.getNotAfter();
 460                 int certificateVersion = x509Certificate.getVersion();
 461                 BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
 462                 String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
 463
 464                 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
 465                 SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
 466                 SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
 467                 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
 468                 SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
 469                 SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
 470                 SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
 471                 SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
 472
 473                 // Setup the spans to display the device information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 474                 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 475                 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 476                 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 477                 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 478                 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 479                 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 480                 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 481
 482                 // Display the strings in the text boxes.
 483                 certificateIssuerDnTextView.setText(issuerDNStringBuilder);
 484                 certificateSubjectDnTextView.setText(subjectDNStringBuilder);
 485                 certificateStartDateTextView.setText(startDateStringBuilder);
 486                 certificateEndDateTextView.setText(endDataStringBuilder);
 487                 certificateVersionTextView.setText(certificateVersionStringBuilder);
 488                 certificateSerialNumberTextView.setText(serialNumberStringBuilder);
 489                 certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
 490             } catch (CertificateException e) {
 491                 // Do nothing if there is a certificate error.
 492             }
 493
 494             // Get a handle for the runtime.
 495             runtime = Runtime.getRuntime();
 496
 497             // Get a handle for the activity.
 498             Activity activity = getActivity();
 499
 500             // Remove the incorrect lint warning below that the activity might be null.
 501             assert activity != null;
 502
 503             // Get a handle for the activity manager.
 504             activityManager = (ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE);
 505
 506             // Remove the incorrect lint warning below that the activity manager might be null.
 507             assert activityManager != null;
 508
 509             // Instantiate a memory info variable.
 510             memoryInfo = new ActivityManager.MemoryInfo();
 511
 512             // Define a number format.
 513             numberFormat = NumberFormat.getInstance();
 514
 515             // Set the minimum and maximum number of fraction digits.
 516             numberFormat.setMinimumFractionDigits(2);
 517             numberFormat.setMaximumFractionDigits(2);
 518
 519             // Update the memory usage.
 520             updateMemoryUsage(getActivity());
 521         } catch (PackageManager.NameNotFoundException e) {
 522             // Do nothing if `PackageManager` says Privacy Browser isn't installed.
 523         }
 524
 525         // Scroll the tab if the saved instance state is not null.
 526         if (savedInstanceState != null) {
 527             aboutVersionLayout.post(() -> {
 528                 aboutVersionLayout.setScrollX(savedInstanceState.getInt("scroll_x"));
 529                 aboutVersionLayout.setScrollY(savedInstanceState.getInt("scroll_y"));
 530             });
 531         }
 532
 533         // Return the tab layout.
 534         return aboutVersionLayout;
 535     }
 536
 537     @Override
 538     public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater menuInflater) {
 539         // Inflate the about version menu.
 540         menuInflater.inflate(R.menu.about_version_options_menu, menu);
 541
 542         // Run the default commands.
 543         super.onCreateOptionsMenu(menu, menuInflater);
 544     }
 545
 546     @Override
 547     public boolean onOptionsItemSelected(@NonNull MenuItem menuItem) {
 548         // Remove the incorrect lint warning below that the activity might be null.
 549         assert getActivity() != null;
 550
 551         // Get the ID of the menu item that was selected.
 552         int menuItemId = menuItem.getItemId();
 553
 554         // Run the appropriate commands.
 555         if (menuItemId == R.id.copy) {  // Copy.
 556             // Get the about version string.
 557             String aboutVersionString = getAboutVersionString();
 558
 559             // Get a handle for the clipboard manager.
 560             ClipboardManager clipboardManager = (ClipboardManager) getActivity().getSystemService(Context.CLIPBOARD_SERVICE);
 561
 562             // Remove the incorrect lint error below that the clipboard manager might be null.
 563             assert clipboardManager != null;
 564
 565             // Save the about version string in a clip data.
 566             ClipData aboutVersionClipData = ClipData.newPlainText(getString(R.string.about), aboutVersionString);
 567
 568             // Place the clip data on the clipboard.
 569             clipboardManager.setPrimaryClip(aboutVersionClipData);
 570
 571             // Display a snackbar.
 572             Snackbar.make(aboutVersionLayout, R.string.version_info_copied, Snackbar.LENGTH_SHORT).show();
 573
 574             // Consume the event.
 575             return true;
 576         } else if (menuItemId == R.id.share) {  // Share.
 577             // Get the about version string.
 578             String aboutString = getAboutVersionString();
 579
 580             // Create an email intent.
 581             Intent emailIntent = new Intent(Intent.ACTION_SEND);
 582
 583             // Add the about version string to the intent.
 584             emailIntent.putExtra(Intent.EXTRA_TEXT, aboutString);
 585
 586             // Set the MIME type.
 587             emailIntent.setType("text/plain");
 588
 589             // Set the intent to open in a new task.
 590             emailIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 591
 592             // Make it so.
 593             startActivity(Intent.createChooser(emailIntent, getString(R.string.share)));
 594
 595             // Consume the event.
 596             return true;
 597         } else if (menuItemId == R.id.save_text) {  // Save text.
 598             // Instantiate the save alert dialog.
 599             DialogFragment saveTextDialogFragment = SaveDialog.save(SaveDialog.SAVE_ABOUT_VERSION_TEXT);
 600
 601             // Show the save alert dialog.
 602             saveTextDialogFragment.show(getActivity().getSupportFragmentManager(), getString(R.string.save_dialog));
 603
 604             // Consume the event.
 605             return true;
 606         } else if (menuItemId == R.id.save_image) {  // Save image.
 607             // Instantiate the save alert dialog.
 608             DialogFragment saveImageDialogFragment = SaveDialog.save(SaveDialog.SAVE_ABOUT_VERSION_IMAGE);
 609
 610             // Show the save alert dialog.
 611             saveImageDialogFragment.show(getActivity().getSupportFragmentManager(), getString(R.string.save_dialog));
 612
 613             // Consume the event.
 614             return true;
 615         } else {  // The home button was selected.
 616             // Return the parent class.
 617             return super.onOptionsItemSelected(menuItem);
 618         }
 619     }
 620
 621     @Override
 622     public void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
 623         // Run the default commands.
 624         super.onSaveInstanceState(savedInstanceState);
 625
 626         // Save the scroll positions if the layout is not null, which can happen if a tab is not currently selected.
 627         if (aboutVersionLayout != null) {
 628             savedInstanceState.putInt("scroll_x", aboutVersionLayout.getScrollX());
 629             savedInstanceState.putInt("scroll_y", aboutVersionLayout.getScrollY());
 630         }
 631     }
 632
 633     @Override
 634     public void onPause() {
 635         // Run the default commands.
 636         super.onPause();
 637
 638         // Pause the updating of the memory usage.
 639         updateMemoryUsageBoolean = false;
 640     }
 641
 642     @Override
 643     public void onResume() {
 644         // Run the default commands.
 645         super.onResume();
 646
 647         // Resume the updating of the memory usage.
 648         updateMemoryUsageBoolean = true;
 649     }
 650
 651     public void updateMemoryUsage(Activity activity) {
 652         try {
 653             // Update the memory usage if enabled.
 654             if (updateMemoryUsageBoolean) {
 655                 // Populate the memory info variable.
 656                 activityManager.getMemoryInfo(memoryInfo);
 657
 658                 // Get the app memory information.
 659                 long appAvailableMemoryLong = runtime.freeMemory();
 660                 long appTotalMemoryLong = runtime.totalMemory();
 661                 long appMaximumMemoryLong = runtime.maxMemory();
 662
 663                 // Calculate the app consumed memory.
 664                 long appConsumedMemoryLong = appTotalMemoryLong - appAvailableMemoryLong;
 665
 666                 // Get the system memory information.
 667                 long systemTotalMemoryLong = memoryInfo.totalMem;
 668                 long systemAvailableMemoryLong = memoryInfo.availMem;
 669
 670                 // Calculate the system consumed memory.
 671                 long systemConsumedMemoryLong = systemTotalMemoryLong - systemAvailableMemoryLong;
 672
 673                 // Convert the memory information into mebibytes.
 674                 float appConsumedMemoryFloat = (float) appConsumedMemoryLong / MEBIBYTE;
 675                 float appAvailableMemoryFloat = (float) appAvailableMemoryLong / MEBIBYTE;
 676                 float appTotalMemoryFloat = (float) appTotalMemoryLong / MEBIBYTE;
 677                 float appMaximumMemoryFloat = (float) appMaximumMemoryLong / MEBIBYTE;
 678                 float systemConsumedMemoryFloat = (float) systemConsumedMemoryLong / MEBIBYTE;
 679                 float systemAvailableMemoryFloat = (float) systemAvailableMemoryLong / MEBIBYTE;
 680                 float systemTotalMemoryFloat = (float) systemTotalMemoryLong / MEBIBYTE;
 681
 682                 // Get the mebibyte string.
 683                 String mebibyte = getString(R.string.mebibyte);
 684
 685                 // Calculate the mebibyte length.
 686                 int mebibyteLength = mebibyte.length();
 687
 688                 // Create spannable string builders.
 689                 SpannableStringBuilder appConsumedMemoryStringBuilder = new SpannableStringBuilder(appConsumedMemoryLabel + numberFormat.format(appConsumedMemoryFloat) + " " + mebibyte);
 690                 SpannableStringBuilder appAvailableMemoryStringBuilder = new SpannableStringBuilder(appAvailableMemoryLabel + numberFormat.format(appAvailableMemoryFloat) + " " + mebibyte);
 691                 SpannableStringBuilder appTotalMemoryStringBuilder = new SpannableStringBuilder(appTotalMemoryLabel + numberFormat.format(appTotalMemoryFloat) + " " + mebibyte);
 692                 SpannableStringBuilder appMaximumMemoryStringBuilder = new SpannableStringBuilder(appMaximumMemoryLabel + numberFormat.format(appMaximumMemoryFloat) + " " + mebibyte);
 693                 SpannableStringBuilder systemConsumedMemoryStringBuilder = new SpannableStringBuilder(systemConsumedMemoryLabel + numberFormat.format(systemConsumedMemoryFloat) + " " + mebibyte);
 694                 SpannableStringBuilder systemAvailableMemoryStringBuilder = new SpannableStringBuilder(systemAvailableMemoryLabel + numberFormat.format(systemAvailableMemoryFloat) + " " + mebibyte);
 695                 SpannableStringBuilder systemTotalMemoryStringBuilder = new SpannableStringBuilder(systemTotalMemoryLabel + numberFormat.format(systemTotalMemoryFloat) + " " + mebibyte);
 696
 697                 // Setup the spans to display the memory information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 698                 appConsumedMemoryStringBuilder.setSpan(blueColorSpan, appConsumedMemoryLabel.length(), appConsumedMemoryStringBuilder.length() - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 699                 appAvailableMemoryStringBuilder.setSpan(blueColorSpan, appAvailableMemoryLabel.length(), appAvailableMemoryStringBuilder.length() - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 700                 appTotalMemoryStringBuilder.setSpan(blueColorSpan, appTotalMemoryLabel.length(), appTotalMemoryStringBuilder.length() - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 701                 appMaximumMemoryStringBuilder.setSpan(blueColorSpan, appMaximumMemoryLabel.length(), appMaximumMemoryStringBuilder.length() - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 702                 systemConsumedMemoryStringBuilder.setSpan(blueColorSpan, systemConsumedMemoryLabel.length(), systemConsumedMemoryStringBuilder.length() - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 703                 systemAvailableMemoryStringBuilder.setSpan(blueColorSpan, systemAvailableMemoryLabel.length(), systemAvailableMemoryStringBuilder.length() - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 704                 systemTotalMemoryStringBuilder.setSpan(blueColorSpan, systemTotalMemoryLabel.length(), systemTotalMemoryStringBuilder.length() - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 705
 706                 // Display the string in the text boxes.
 707                 appConsumedMemoryTextView.setText(appConsumedMemoryStringBuilder);
 708                 appAvailableMemoryTextView.setText(appAvailableMemoryStringBuilder);
 709                 appTotalMemoryTextView.setText(appTotalMemoryStringBuilder);
 710                 appMaximumMemoryTextView.setText(appMaximumMemoryStringBuilder);
 711                 systemConsumedMemoryTextView.setText(systemConsumedMemoryStringBuilder);
 712                 systemAvailableMemoryTextView.setText(systemAvailableMemoryStringBuilder);
 713                 systemTotalMemoryTextView.setText(systemTotalMemoryStringBuilder);
 714             }
 715
 716             // Schedule another memory update if the activity has not been destroyed.
 717             if (!activity.isDestroyed()) {
 718                 // Create a handler to update the memory usage.
 719                 Handler updateMemoryUsageHandler = new Handler();
 720
 721                 // Create a runnable to update the memory usage.
 722                 Runnable updateMemoryUsageRunnable = () -> updateMemoryUsage(activity);
 723
 724                 // Update the memory usage after 1000 milliseconds
 725                 updateMemoryUsageHandler.postDelayed(updateMemoryUsageRunnable, 1000);
 726             }
 727         } catch (Exception exception) {
 728             // Do nothing.
 729         }
 730     }
 731
 732     public String getAboutVersionString() {
 733         // Initialize an about version string builder.
 734         StringBuilder aboutVersionStringBuilder = new StringBuilder();
 735
 736         // Populate the about version string builder.
 737         aboutVersionStringBuilder.append(privacyBrowserTextView.getText());
 738         aboutVersionStringBuilder.append("\n");
 739         aboutVersionStringBuilder.append(versionTextView.getText());
 740         aboutVersionStringBuilder.append("\n\n");
 741         aboutVersionStringBuilder.append(hardwareTextView.getText());
 742         aboutVersionStringBuilder.append("\n");
 743         aboutVersionStringBuilder.append(brandTextView.getText());
 744         aboutVersionStringBuilder.append("\n");
 745         aboutVersionStringBuilder.append(manufacturerTextView.getText());
 746         aboutVersionStringBuilder.append("\n");
 747         aboutVersionStringBuilder.append(modelTextView.getText());
 748         aboutVersionStringBuilder.append("\n");
 749         aboutVersionStringBuilder.append(deviceTextView.getText());
 750         aboutVersionStringBuilder.append("\n");
 751         aboutVersionStringBuilder.append(bootloaderTextView.getText());
 752         aboutVersionStringBuilder.append("\n");
 753         if (radioTextView.getVisibility() == View.VISIBLE) {
 754             aboutVersionStringBuilder.append(radioTextView.getText());
 755             aboutVersionStringBuilder.append("\n");
 756         }
 757         aboutVersionStringBuilder.append("\n");
 758         aboutVersionStringBuilder.append(softwareTextView.getText());
 759         aboutVersionStringBuilder.append("\n");
 760         aboutVersionStringBuilder.append(androidTextView.getText());
 761         aboutVersionStringBuilder.append("\n");
 762         if (securityPatchTextView.getVisibility() == View.VISIBLE) {
 763             aboutVersionStringBuilder.append(securityPatchTextView.getText());
 764             aboutVersionStringBuilder.append("\n");
 765         }
 766         aboutVersionStringBuilder.append(buildTextView.getText());
 767         aboutVersionStringBuilder.append("\n");
 768         if (webViewProviderTextView.getVisibility() == View.VISIBLE) {
 769             aboutVersionStringBuilder.append(webViewProviderTextView.getText());
 770             aboutVersionStringBuilder.append("\n");
 771         }
 772         aboutVersionStringBuilder.append(webViewVersionTextView.getText());
 773         aboutVersionStringBuilder.append("\n");
 774         if (orbotTextView.getVisibility() == View.VISIBLE) {
 775             aboutVersionStringBuilder.append(orbotTextView.getText());
 776             aboutVersionStringBuilder.append("\n");
 777         }
 778         if (i2pTextView.getVisibility() == View.VISIBLE) {
 779             aboutVersionStringBuilder.append(i2pTextView.getText());
 780             aboutVersionStringBuilder.append("\n");
 781         }
 782         if (openKeychainTextView.getVisibility() == View.VISIBLE) {
 783             aboutVersionStringBuilder.append(openKeychainTextView.getText());
 784             aboutVersionStringBuilder.append("\n");
 785         }
 786         aboutVersionStringBuilder.append("\n");
 787         aboutVersionStringBuilder.append(memoryUsageTextView.getText());
 788         aboutVersionStringBuilder.append("\n");
 789         aboutVersionStringBuilder.append(appConsumedMemoryTextView.getText());
 790         aboutVersionStringBuilder.append("\n");
 791         aboutVersionStringBuilder.append(appAvailableMemoryTextView.getText());
 792         aboutVersionStringBuilder.append("\n");
 793         aboutVersionStringBuilder.append(appTotalMemoryTextView.getText());
 794         aboutVersionStringBuilder.append("\n");
 795         aboutVersionStringBuilder.append(appMaximumMemoryTextView.getText());
 796         aboutVersionStringBuilder.append("\n");
 797         aboutVersionStringBuilder.append(systemConsumedMemoryTextView.getText());
 798         aboutVersionStringBuilder.append("\n");
 799         aboutVersionStringBuilder.append(systemAvailableMemoryTextView.getText());
 800         aboutVersionStringBuilder.append("\n");
 801         aboutVersionStringBuilder.append(systemTotalMemoryTextView.getText());
 802         aboutVersionStringBuilder.append("\n\n");
 803         aboutVersionStringBuilder.append(blocklistsTextView.getText());
 804         aboutVersionStringBuilder.append("\n");
 805         aboutVersionStringBuilder.append(easyListTextView.getText());
 806         aboutVersionStringBuilder.append("\n");
 807         aboutVersionStringBuilder.append(easyPrivacyTextView.getText());
 808         aboutVersionStringBuilder.append("\n");
 809         aboutVersionStringBuilder.append(fanboyAnnoyanceTextView.getText());
 810         aboutVersionStringBuilder.append("\n");
 811         aboutVersionStringBuilder.append(fanboySocialTextView.getText());
 812         aboutVersionStringBuilder.append("\n");
 813         aboutVersionStringBuilder.append(ultraListTextView.getText());
 814         aboutVersionStringBuilder.append("\n");
 815         aboutVersionStringBuilder.append(ultraPrivacyTextView.getText());
 816         aboutVersionStringBuilder.append("\n\n");
 817         aboutVersionStringBuilder.append(packageSignatureTextView.getText());
 818         aboutVersionStringBuilder.append("\n");
 819         aboutVersionStringBuilder.append(certificateIssuerDnTextView.getText());
 820         aboutVersionStringBuilder.append("\n");
 821         aboutVersionStringBuilder.append(certificateSubjectDnTextView.getText());
 822         aboutVersionStringBuilder.append("\n");
 823         aboutVersionStringBuilder.append(certificateStartDateTextView.getText());
 824         aboutVersionStringBuilder.append("\n");
 825         aboutVersionStringBuilder.append(certificateEndDateTextView.getText());
 826         aboutVersionStringBuilder.append("\n");
 827         aboutVersionStringBuilder.append(certificateVersionTextView.getText());
 828         aboutVersionStringBuilder.append("\n");
 829         aboutVersionStringBuilder.append(certificateSerialNumberTextView.getText());
 830         aboutVersionStringBuilder.append("\n");
 831         aboutVersionStringBuilder.append(certificateSignatureAlgorithmTextView.getText());
 832
 833         // Return the string.
 834         return aboutVersionStringBuilder.toString();
 835     }
 836 }