2 * Copyright © 2016-2019 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
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.
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.
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/>.
20 package com.stoutner.privacybrowser.fragments;
22 import android.annotation.SuppressLint;
23 import android.content.Context;
24 import android.content.SharedPreferences;
25 import android.content.pm.PackageManager;
26 import android.content.pm.Signature;
27 import android.os.Build;
28 import android.os.Bundle;
29 import android.preference.PreferenceManager;
30 import android.text.SpannableStringBuilder;
31 import android.text.Spanned;
32 import android.text.style.ForegroundColorSpan;
33 import android.view.LayoutInflater;
34 import android.view.View;
35 import android.view.ViewGroup;
36 import android.webkit.WebView;
37 import android.widget.TextView;
39 import androidx.annotation.NonNull;
40 import androidx.fragment.app.Fragment;
42 import com.stoutner.privacybrowser.BuildConfig;
43 import com.stoutner.privacybrowser.R;
45 import java.io.ByteArrayInputStream;
46 import java.io.InputStream;
47 import java.math.BigInteger;
48 import java.security.Principal;
49 import java.security.cert.CertificateException;
50 import java.security.cert.CertificateFactory;
51 import java.security.cert.X509Certificate;
52 import java.text.DateFormat;
53 import java.util.Date;
55 public class AboutTabFragment extends Fragment {
56 // Declare the class variables.
57 private int tabNumber;
58 private String[] blocklistVersions;
60 public static AboutTabFragment createTab(int tabNumber, String[] blocklistVersions) {
62 Bundle argumentsBundle = new Bundle();
64 // Store the tab number in the bundle.
65 argumentsBundle.putInt("tab_number", tabNumber);
66 argumentsBundle.putStringArray("blocklist_versions", blocklistVersions);
68 // Create a new instance of the tab fragment.
69 AboutTabFragment aboutTabFragment = new AboutTabFragment();
71 // Add the arguments bundle to the fragment.
72 aboutTabFragment.setArguments(argumentsBundle);
74 // Return the new fragment.
75 return aboutTabFragment;
79 public void onCreate(Bundle savedInstanceState) {
80 // Run the default commands.
81 super.onCreate(savedInstanceState);
83 // Get a handle for the arguments.
84 Bundle arguments = getArguments();
86 // Remove the incorrect lint warning below that arguments might be null.
87 assert arguments != null;
89 // Store the arguments in class variables.
90 tabNumber = getArguments().getInt("tab_number");
91 blocklistVersions = getArguments().getStringArray("blocklist_versions");
95 public View onCreateView(@NonNull LayoutInflater layoutInflater, ViewGroup container, Bundle savedInstanceState) {
96 // Create a tab layout view.
99 // Get a handle for the context and assert that it isn't null.
100 Context context = getContext();
101 assert context != null;
103 // Get a handle for the shared preferences.
104 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
106 // Get the theme preference.
107 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
109 // Load the tabs. Tab numbers start at 0.
110 if (tabNumber == 0) { // Load the about tab.
111 // 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.
112 tabLayout = layoutInflater.inflate(R.layout.about_tab_version, container, false);
114 // Get handles for the `TextViews`.
115 TextView versionTextView = tabLayout.findViewById(R.id.version);
116 TextView brandTextView = tabLayout.findViewById(R.id.brand);
117 TextView manufacturerTextView = tabLayout.findViewById(R.id.manufacturer);
118 TextView modelTextView = tabLayout.findViewById(R.id.model);
119 TextView deviceTextView = tabLayout.findViewById(R.id.device);
120 TextView bootloaderTextView = tabLayout.findViewById(R.id.bootloader);
121 TextView radioTextView = tabLayout.findViewById(R.id.radio);
122 TextView androidTextView = tabLayout.findViewById(R.id.android);
123 TextView securityPatchTextView = tabLayout.findViewById(R.id.security_patch);
124 TextView buildTextView = tabLayout.findViewById(R.id.build);
125 TextView webViewTextView = tabLayout.findViewById(R.id.webview);
126 TextView orbotTextView = tabLayout.findViewById(R.id.orbot);
127 TextView openKeychainTextView = tabLayout.findViewById(R.id.open_keychain);
128 TextView easyListTextView = tabLayout.findViewById(R.id.easylist);
129 TextView easyPrivacyTextView = tabLayout.findViewById(R.id.easyprivacy);
130 TextView fanboyAnnoyanceTextView = tabLayout.findViewById(R.id.fanboy_annoyance);
131 TextView fanboySocialTextView = tabLayout.findViewById(R.id.fanboy_social);
132 TextView ultraPrivacyTextView = tabLayout.findViewById(R.id.ultraprivacy);
133 TextView certificateIssuerDNTextView = tabLayout.findViewById(R.id.certificate_issuer_dn);
134 TextView certificateSubjectDNTextView = tabLayout.findViewById(R.id.certificate_subject_dn);
135 TextView certificateStartDateTextView = tabLayout.findViewById(R.id.certificate_start_date);
136 TextView certificateEndDateTextView = tabLayout.findViewById(R.id.certificate_end_date);
137 TextView certificateVersionTextView = tabLayout.findViewById(R.id.certificate_version);
138 TextView certificateSerialNumberTextView = tabLayout.findViewById(R.id.certificate_serial_number);
139 TextView certificateSignatureAlgorithmTextView = tabLayout.findViewById(R.id.certificate_signature_algorithm);
142 String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + BuildConfig.VERSION_CODE + ")";
143 String brandLabel = getString(R.string.brand) + " ";
144 String manufacturerLabel = getString(R.string.manufacturer) + " ";
145 String modelLabel = getString(R.string.model) + " ";
146 String deviceLabel = getString(R.string.device) + " ";
147 String bootloaderLabel = getString(R.string.bootloader) + " ";
148 String androidLabel = getString(R.string.android) + " ";
149 String buildLabel = getString(R.string.build) + " ";
150 String webViewLabel = getString(R.string.webview) + " ";
151 String easyListLabel = getString(R.string.easylist_label) + " ";
152 String easyPrivacyLabel = getString(R.string.easyprivacy_label) + " ";
153 String fanboyAnnoyanceLabel = getString(R.string.fanboy_annoyance_label) + " ";
154 String fanboySocialLabel = getString(R.string.fanboy_social_label) + " ";
155 String ultraPrivacyLabel = getString(R.string.ultraprivacy_label) + " ";
156 String issuerDNLabel = getString(R.string.issuer_dn) + " ";
157 String subjectDNLabel = getString(R.string.subject_dn) + " ";
158 String startDateLabel = getString(R.string.start_date) + " ";
159 String endDateLabel = getString(R.string.end_date) + " ";
160 String certificateVersionLabel = getString(R.string.certificate_version) + " ";
161 String serialNumberLabel = getString(R.string.serial_number) + " ";
162 String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + " ";
164 // `webViewLayout` is only used to get the default user agent from `bare_webview`. It is not used to render content on the screen.
165 View webViewLayout = layoutInflater.inflate(R.layout.bare_webview, container, false);
166 WebView tabLayoutWebView = webViewLayout.findViewById(R.id.bare_webview);
167 String userAgentString = tabLayoutWebView.getSettings().getUserAgentString();
169 // Get the device's information and store it in strings.
170 String brand = Build.BRAND;
171 String manufacturer = Build.MANUFACTURER;
172 String model = Build.MODEL;
173 String device = Build.DEVICE;
174 String bootloader = Build.BOOTLOADER;
175 String radio = Build.getRadioVersion();
176 String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Build.VERSION.SDK_INT + ")";
177 String build = Build.DISPLAY;
178 // Select the substring that begins after `Chrome/` and goes until the next ` `.
179 String webView = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
181 // Get the Orbot version name if Orbot is installed.
184 // Store the version name.
185 orbot = context.getPackageManager().getPackageInfo("org.torproject.android", 0).versionName;
186 } catch (PackageManager.NameNotFoundException exception) { // Orbot is not installed.
190 // Get the OpenKeychain version name if it is installed.
193 // Store the version name.
194 openKeychain = context.getPackageManager().getPackageInfo("org.sufficientlysecure.keychain", 0).versionName;
195 } catch (PackageManager.NameNotFoundException exception) { // OpenKeychain is not installed.
199 // Create a `SpannableStringBuilder` for the hardware and software `TextViews` that needs multiple colors of text.
200 SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
201 SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
202 SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
203 SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
204 SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
205 SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
206 SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
207 SpannableStringBuilder webViewStringBuilder = new SpannableStringBuilder(webViewLabel + webView);
208 SpannableStringBuilder easyListStringBuilder = new SpannableStringBuilder(easyListLabel + blocklistVersions[0]);
209 SpannableStringBuilder easyPrivacyStringBuilder = new SpannableStringBuilder(easyPrivacyLabel + blocklistVersions[1]);
210 SpannableStringBuilder fanboyAnnoyanceStringBuilder = new SpannableStringBuilder(fanboyAnnoyanceLabel + blocklistVersions[2]);
211 SpannableStringBuilder fanboySocialStringBuilder = new SpannableStringBuilder(fanboySocialLabel + blocklistVersions[3]);
212 SpannableStringBuilder ultraPrivacyStringBuilder = new SpannableStringBuilder(ultraPrivacyLabel + blocklistVersions[4]);
214 // Create the `blueColorSpan` variable.
215 ForegroundColorSpan blueColorSpan;
217 // Set `blueColorSpan` according to the theme. We have to use the deprecated `getColor()` until API >= 23.
219 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
221 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
224 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
225 brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
226 manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
227 modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
228 deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
229 bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
230 androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
231 buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
232 webViewStringBuilder.setSpan(blueColorSpan, webViewLabel.length(), webViewStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
233 easyListStringBuilder.setSpan(blueColorSpan, easyListLabel.length(), easyListStringBuilder.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
234 easyPrivacyStringBuilder.setSpan(blueColorSpan, easyPrivacyLabel.length(), easyPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
235 fanboyAnnoyanceStringBuilder.setSpan(blueColorSpan, fanboyAnnoyanceLabel.length(), fanboyAnnoyanceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
236 fanboySocialStringBuilder.setSpan(blueColorSpan, fanboySocialLabel.length(), fanboySocialStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
237 ultraPrivacyStringBuilder.setSpan(blueColorSpan, ultraPrivacyLabel.length(), ultraPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
239 // Display the strings in the text boxes.
240 versionTextView.setText(version);
241 brandTextView.setText(brandStringBuilder);
242 manufacturerTextView.setText(manufacturerStringBuilder);
243 modelTextView.setText(modelStringBuilder);
244 deviceTextView.setText(deviceStringBuilder);
245 bootloaderTextView.setText(bootloaderStringBuilder);
246 androidTextView.setText(androidStringBuilder);
247 buildTextView.setText(buildStringBuilder);
248 webViewTextView.setText(webViewStringBuilder);
249 easyListTextView.setText(easyListStringBuilder);
250 easyPrivacyTextView.setText(easyPrivacyStringBuilder);
251 fanboyAnnoyanceTextView.setText(fanboyAnnoyanceStringBuilder);
252 fanboySocialTextView.setText(fanboySocialStringBuilder);
253 ultraPrivacyTextView.setText(ultraPrivacyStringBuilder);
255 // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
256 if (Build.VERSION.SDK_INT >= 23) {
257 String securityPatchLabel = getString(R.string.security_patch) + " ";
258 String securityPatch = Build.VERSION.SECURITY_PATCH;
259 SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
260 securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
261 securityPatchTextView.setText(securityPatchStringBuilder);
262 } else { // SDK_INT < 23.
263 securityPatchTextView.setVisibility(View.GONE);
266 // Only populate the radio text view if there is a radio in the device.
267 if (!radio.isEmpty()) {
268 String radioLabel = getString(R.string.radio) + " ";
269 SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
270 radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
271 radioTextView.setText(radioStringBuilder);
272 } else { // This device does not have a radio.
273 radioTextView.setVisibility(View.GONE);
276 // Only populate the Orbot text view if it is installed.
277 if (!orbot.isEmpty()) {
278 String orbotLabel = getString(R.string.orbot) + " ";
279 SpannableStringBuilder orbotStringBuilder = new SpannableStringBuilder(orbotLabel + orbot);
280 orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length(), orbotStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
281 orbotTextView.setText(orbotStringBuilder);
282 } else { // Orbot is not installed.
283 orbotTextView.setVisibility(View.GONE);
286 // Only populate the OpenKeychain text view if it is installed.
287 if (!openKeychain.isEmpty()) {
288 String openKeychainLabel = getString(R.string.openkeychain) + " ";
289 SpannableStringBuilder openKeychainStringBuilder = new SpannableStringBuilder(openKeychainLabel + openKeychain);
290 openKeychainStringBuilder.setSpan(blueColorSpan, openKeychainLabel.length(), openKeychainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
291 openKeychainTextView.setText(openKeychainStringBuilder);
292 } else { //OpenKeychain is not installed.
293 openKeychainTextView.setVisibility(View.GONE);
296 // Display the package signature.
298 // Get the first package signature. Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
299 @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(), PackageManager.GET_SIGNATURES).signatures[0];
301 // Convert the signature to a `byte[]` `InputStream`.
302 InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
304 // Display the certificate information on the screen.
306 // Instantiate a `CertificateFactory`.
307 CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
309 // Generate an `X509Certificate`.
310 X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
312 // Store the individual sections of the certificate that we are interested in.
313 Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
314 Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
315 Date startDate = x509Certificate.getNotBefore();
316 Date endDate = x509Certificate.getNotAfter();
317 int certificateVersion = x509Certificate.getVersion();
318 BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
319 String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
321 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
322 SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
323 SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
324 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
325 SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
326 SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
327 SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
328 SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
330 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
331 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
332 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
333 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
334 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
335 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
336 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
337 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
339 // Display the strings in the text boxes.
340 certificateIssuerDNTextView.setText(issuerDNStringBuilder);
341 certificateSubjectDNTextView.setText(subjectDNStringBuilder);
342 certificateStartDateTextView.setText(startDateStringBuilder);
343 certificateEndDateTextView.setText(endDataStringBuilder);
344 certificateVersionTextView.setText(certificateVersionStringBuilder);
345 certificateSerialNumberTextView.setText(serialNumberStringBuilder);
346 certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
347 } catch (CertificateException e) {
348 // Do nothing if there is a certificate error.
350 } catch (PackageManager.NameNotFoundException e) {
351 // Do nothing if `PackageManager` says Privacy Browser isn't installed.
353 } else { // load a `WebView` for all the other tabs. Tab numbers start at 0.
354 // 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.
355 tabLayout = layoutInflater.inflate(R.layout.bare_webview, container, false);
357 // Get a handle for `tabWebView`.
358 WebView tabWebView = (WebView) tabLayout;
360 // Load the tabs according to the theme.
361 if (darkTheme) { // The dark theme is applied.
362 // Set the background color. The deprecated `.getColor()` must be used until the minimum API >= 23.
363 tabWebView.setBackgroundColor(getResources().getColor(R.color.gray_850));
367 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_dark.html");
371 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_dark.html");
375 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_dark.html");
379 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_dark.html");
383 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_dark.html");
387 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_dark.html");
390 } else { // The light theme is applied.
393 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_light.html");
397 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_light.html");
401 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_light.html");
405 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_light.html");
409 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_light.html");
413 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_light.html");
419 // Return the formatted `tabLayout`.