d4bd52fc22d0a6a8b3942af1ec47758f0c8cb1f7
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / fragments / AboutTabFragment.java
1 /*
2  * Copyright © 2016-2018 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.fragments;
21
22 import android.annotation.SuppressLint;
23 import android.content.pm.PackageManager;
24 import android.content.pm.Signature;
25 import android.os.Build;
26 import android.os.Bundle;
27 import android.support.annotation.NonNull;
28 import android.support.v4.app.Fragment;
29 import android.text.SpannableStringBuilder;
30 import android.text.Spanned;
31 import android.text.style.ForegroundColorSpan;
32 import android.view.LayoutInflater;
33 import android.view.View;
34 import android.view.ViewGroup;
35 import android.webkit.WebView;
36 import android.widget.TextView;
37
38 import com.stoutner.privacybrowser.BuildConfig;
39 import com.stoutner.privacybrowser.R;
40 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
41
42 import java.io.ByteArrayInputStream;
43 import java.io.InputStream;
44 import java.math.BigInteger;
45 import java.security.Principal;
46 import java.security.cert.CertificateException;
47 import java.security.cert.CertificateFactory;
48 import java.security.cert.X509Certificate;
49 import java.text.DateFormat;
50 import java.util.Date;
51
52 public class AboutTabFragment extends Fragment {
53     private int tabNumber;
54
55     // Store the tab number in the arguments bundle.
56     public static AboutTabFragment createTab(int tab) {
57         // Create a bundle.
58         Bundle bundle = new Bundle();
59
60         // Store the tab number in the bundle.
61         bundle.putInt("Tab", tab);
62
63         // Add the bundle to the fragment.
64         AboutTabFragment aboutTabFragment = new AboutTabFragment();
65         aboutTabFragment.setArguments(bundle);
66
67         // Return the new fragment.
68         return aboutTabFragment;
69     }
70
71     @Override
72     public void onCreate(Bundle savedInstanceState) {
73         // Run the default commands.
74         super.onCreate(savedInstanceState);
75
76         // Remove the lint warning that `getArguments()` might be null.
77         assert getArguments() != null;
78
79         // Store the tab number in a class variable.
80         tabNumber = getArguments().getInt("Tab");
81     }
82
83     @Override
84     public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
85         View tabLayout;
86
87         // Load the tabs.  Tab numbers start at 0.
88         if (tabNumber == 0) {  // Load the about tab.
89             // 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.
90             tabLayout = inflater.inflate(R.layout.about_tab_version, container, false);
91
92             // Get handles for the `TextViews`.
93             TextView versionNumberTextView = tabLayout.findViewById(R.id.about_version_number);
94             TextView versionBrandTextView = tabLayout.findViewById(R.id.about_version_brand);
95             TextView versionManufacturerTextView = tabLayout.findViewById(R.id.about_version_manufacturer);
96             TextView versionModelTextView = tabLayout.findViewById(R.id.about_version_model);
97             TextView versionDeviceTextView = tabLayout.findViewById(R.id.about_version_device);
98             TextView versionBootloaderTextView = tabLayout.findViewById(R.id.about_version_bootloader);
99             TextView versionRadioTextView = tabLayout.findViewById(R.id.about_version_radio);
100             TextView versionAndroidTextView = tabLayout.findViewById(R.id.about_version_android);
101             TextView versionSecurityPatchTextView = tabLayout.findViewById(R.id.about_version_securitypatch);
102             TextView versionBuildTextView = tabLayout.findViewById(R.id.about_version_build);
103             TextView versionWebViewTextView = tabLayout.findViewById(R.id.about_version_webview);
104             TextView versionOrbotTextView = tabLayout.findViewById(R.id.about_version_orbot);
105             TextView versionEasyListTextView = tabLayout.findViewById(R.id.about_version_easylist);
106             TextView versionEasyPrivacyTextView = tabLayout.findViewById(R.id.about_version_easyprivacy);
107             TextView versionFanboyAnnoyanceTextView = tabLayout.findViewById(R.id.about_version_fanboy_annoyance);
108             TextView versionFanboySocialTextView = tabLayout.findViewById(R.id.about_version_fanboy_social);
109             TextView versionUltraPrivacyTextView = tabLayout.findViewById(R.id.about_version_ultraprivacy);
110             TextView certificateIssuerDNTextView = tabLayout.findViewById(R.id.about_version_certificate_issuer_dn);
111             TextView certificateSubjectDNTextView = tabLayout.findViewById(R.id.about_version_certificate_subject_dn);
112             TextView certificateStartDateTextView = tabLayout.findViewById(R.id.about_version_certificate_start_date);
113             TextView certificateEndDateTextView = tabLayout.findViewById(R.id.about_version_certificate_end_date);
114             TextView certificateVersionTextView = tabLayout.findViewById(R.id.about_version_certificate_version);
115             TextView certificateSerialNumberTextView = tabLayout.findViewById(R.id.about_version_certificate_serial_number);
116             TextView certificateSignatureAlgorithmTextView = tabLayout.findViewById(R.id.about_version_certificate_signature_algorithm);
117
118             // Setup the labels.
119             String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + Integer.toString(BuildConfig.VERSION_CODE) + ")";
120             String brandLabel = getString(R.string.brand) + "  ";
121             String manufacturerLabel = getString(R.string.manufacturer) + "  ";
122             String modelLabel = getString(R.string.model) + "  ";
123             String deviceLabel = getString(R.string.device) + "  ";
124             String bootloaderLabel = getString(R.string.bootloader) + "  ";
125             String androidLabel = getString(R.string.android) + "  ";
126             String buildLabel = getString(R.string.build) + "  ";
127             String webViewLabel = getString(R.string.webview) + "  ";
128             String easyListLabel = getString(R.string.easylist_label) + "  ";
129             String easyPrivacyLabel = getString(R.string.easyprivacy_label) + "  ";
130             String fanboyAnnoyanceLabel = getString(R.string.fanboy_annoyance_label) + "  ";
131             String fanboySocialLabel = getString(R.string.fanboy_social_label) + "  ";
132             String ultraPrivacyLabel = getString(R.string.ultraprivacy_label) + "  ";
133             String issuerDNLabel = getString(R.string.issuer_dn) + "  ";
134             String subjectDNLabel = getString(R.string.subject_dn) + "  ";
135             String startDateLabel = getString(R.string.start_date) + "  ";
136             String endDateLabel = getString(R.string.end_date) + "  ";
137             String certificateVersionLabel = getString(R.string.certificate_version) + "  ";
138             String serialNumberLabel = getString(R.string.serial_number) + "  ";
139             String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + "  ";
140
141             // `webViewLayout` is only used to get the default user agent from `bare_webview`.  It is not used to render content on the screen.
142             View webViewLayout = inflater.inflate(R.layout.bare_webview, container, false);
143             WebView tabLayoutWebView = webViewLayout.findViewById(R.id.bare_webview);
144             String userAgentString =  tabLayoutWebView.getSettings().getUserAgentString();
145
146             // Get the device's information and store it in strings.
147             String brand = Build.BRAND;
148             String manufacturer = Build.MANUFACTURER;
149             String model = Build.MODEL;
150             String device = Build.DEVICE;
151             String bootloader = Build.BOOTLOADER;
152             String radio = Build.getRadioVersion();
153             String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Integer.toString(Build.VERSION.SDK_INT) + ")";
154             String build = Build.DISPLAY;
155             // Select the substring that begins after `Chrome/` and goes until the next ` `.
156             String webView = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
157
158             // Get the Orbot version name if Orbot is installed.
159             String orbot;
160             try {
161                 // Remove the lint warning that `getContext()` might be null.
162                 assert getContext() != null;
163
164                 // Store the version name.
165                 orbot = getContext().getPackageManager().getPackageInfo("org.torproject.android", PackageManager.GET_CONFIGURATIONS).versionName;
166             } catch (PackageManager.NameNotFoundException e) {  // Orbot is not installed.
167                 orbot = "";
168             }
169
170             // Create a `SpannableStringBuilder` for the hardware and software `TextViews` that needs multiple colors of text.
171             SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
172             SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
173             SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
174             SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
175             SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
176             SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
177             SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
178             SpannableStringBuilder webViewStringBuilder = new SpannableStringBuilder(webViewLabel + webView);
179             SpannableStringBuilder easyListStringBuilder = new SpannableStringBuilder(easyListLabel + MainWebViewActivity.easyListVersion);
180             SpannableStringBuilder easyPrivacyStringBuilder = new SpannableStringBuilder(easyPrivacyLabel + MainWebViewActivity.easyPrivacyVersion);
181             SpannableStringBuilder fanboyAnnoyanceStringBuilder = new SpannableStringBuilder(fanboyAnnoyanceLabel + MainWebViewActivity.fanboysAnnoyanceVersion);
182             SpannableStringBuilder fanboySocialStringBuilder = new SpannableStringBuilder(fanboySocialLabel + MainWebViewActivity.fanboysSocialVersion);
183             SpannableStringBuilder ultraPrivacyStringBuilder = new SpannableStringBuilder(ultraPrivacyLabel + MainWebViewActivity.ultraPrivacyVersion);
184
185             // Create the `blueColorSpan` variable.
186             ForegroundColorSpan blueColorSpan;
187
188             // Set `blueColorSpan` according to the theme.  We have to use the deprecated `getColor()` until API >= 23.
189             if (MainWebViewActivity.darkTheme) {
190                 //noinspection deprecation
191                 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
192             } else {
193                 //noinspection deprecation
194                 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
195             }
196
197             // Setup the spans to display the device information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
198             brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
199             manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
200             modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
201             deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
202             bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
203             androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
204             buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
205             webViewStringBuilder.setSpan(blueColorSpan, webViewLabel.length(), webViewStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
206             easyListStringBuilder.setSpan(blueColorSpan, easyListLabel.length(), easyListStringBuilder.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
207             easyPrivacyStringBuilder.setSpan(blueColorSpan, easyPrivacyLabel.length(), easyPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
208             fanboyAnnoyanceStringBuilder.setSpan(blueColorSpan, fanboyAnnoyanceLabel.length(), fanboyAnnoyanceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
209             fanboySocialStringBuilder.setSpan(blueColorSpan, fanboySocialLabel.length(), fanboySocialStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
210             ultraPrivacyStringBuilder.setSpan(blueColorSpan, ultraPrivacyLabel.length(), ultraPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
211
212             // Display the strings in the text boxes.
213             versionNumberTextView.setText(version);
214             versionBrandTextView.setText(brandStringBuilder);
215             versionManufacturerTextView.setText(manufacturerStringBuilder);
216             versionModelTextView.setText(modelStringBuilder);
217             versionDeviceTextView.setText(deviceStringBuilder);
218             versionBootloaderTextView.setText(bootloaderStringBuilder);
219             versionAndroidTextView.setText(androidStringBuilder);
220             versionBuildTextView.setText(buildStringBuilder);
221             versionWebViewTextView.setText(webViewStringBuilder);
222             versionEasyListTextView.setText(easyListStringBuilder);
223             versionEasyPrivacyTextView.setText(easyPrivacyStringBuilder);
224             versionFanboyAnnoyanceTextView.setText(fanboyAnnoyanceStringBuilder);
225             versionFanboySocialTextView.setText(fanboySocialStringBuilder);
226             versionUltraPrivacyTextView.setText(ultraPrivacyStringBuilder);
227
228             // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
229             if (Build.VERSION.SDK_INT >= 23) {
230                 String securityPatchLabel = getString(R.string.security_patch) + "  ";
231                 String securityPatch = Build.VERSION.SECURITY_PATCH;
232                 SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
233                 securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
234                 versionSecurityPatchTextView.setText(securityPatchStringBuilder);
235             } else {  // SDK_INT < 23, so `versionSecurityPatchTextView` should be hidden.
236                 versionSecurityPatchTextView.setVisibility(View.GONE);
237             }
238
239             // Only populate `versionRadioTextView` if there is a radio in the device.
240             if (!radio.equals("")) {
241                 String radioLabel = getString(R.string.radio) + "  ";
242                 SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
243                 radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
244                 versionRadioTextView.setText(radioStringBuilder);
245             } else {  // This device does not have a radio, so `versionRadioTextView` should be hidden.
246                 versionRadioTextView.setVisibility(View.GONE);
247             }
248
249             // Only populate `versionOrbotTextView` if Orbot is installed.
250             if (!orbot.equals("")) {
251                 String orbotLabel = getString(R.string.orbot) + "  ";
252                 SpannableStringBuilder orbotStringBuilder = new SpannableStringBuilder(orbotLabel + orbot);
253                 orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length(), orbotStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
254                 versionOrbotTextView.setText(orbotStringBuilder);
255             } else {  // Orbot is not installed, so the `versionOrbotTextView` should be hidden.
256                 versionOrbotTextView.setVisibility(View.GONE);
257             }
258
259             // Display the package signature.
260             try {
261                 // Get the first package signature.  Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
262                 @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(), PackageManager.GET_SIGNATURES).signatures[0];
263
264                 // Convert the signature to a `byte[]` `InputStream`.
265                 InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
266
267                 // Display the certificate information on the screen.
268                 try {
269                     // Instantiate a `CertificateFactory`.
270                     CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
271
272                     // Generate an `X509Certificate`.
273                     X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
274
275                     // Store the individual sections of the certificate that we are interested in.
276                     Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
277                     Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
278                     Date startDate = x509Certificate.getNotBefore();
279                     Date endDate = x509Certificate.getNotAfter();
280                     int certificateVersion = x509Certificate.getVersion();
281                     BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
282                     String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
283
284                     // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
285                     SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
286                     SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
287                     SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
288                     SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
289                     SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
290                     SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
291                     SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
292
293                     // Setup the spans to display the device information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
294                     issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
295                     subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
296                     startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
297                     endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
298                     certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
299                     serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
300                     signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
301
302                     // Display the strings in the text boxes.
303                     certificateIssuerDNTextView.setText(issuerDNStringBuilder);
304                     certificateSubjectDNTextView.setText(subjectDNStringBuilder);
305                     certificateStartDateTextView.setText(startDateStringBuilder);
306                     certificateEndDateTextView.setText(endDataStringBuilder);
307                     certificateVersionTextView.setText(certificateVersionStringBuilder);
308                     certificateSerialNumberTextView.setText(serialNumberStringBuilder);
309                     certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
310                 } catch (CertificateException e) {
311                     // Do nothing if there is a certificate error.
312                 }
313             } catch (PackageManager.NameNotFoundException e) {
314                 // Do nothing if `PackageManager` says Privacy Browser isn't installed.
315             }
316         } else { // load a `WebView` for all the other tabs.  Tab numbers start at 0.
317             // 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.
318             tabLayout = inflater.inflate(R.layout.bare_webview, container, false);
319
320             // Get a handle for `tabWebView`.
321             WebView tabWebView = (WebView) tabLayout;
322
323             // Load the tabs according to the theme.
324             if (MainWebViewActivity.darkTheme) {  // The dark theme is applied.
325                 // Set the background color.  We have to use the deprecated `.getColor()` until API >= 23.
326                 //noinspection deprecation
327                 tabWebView.setBackgroundColor(getResources().getColor(R.color.gray_850));
328
329                 switch (tabNumber) {
330                     case 1:
331                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_dark.html");
332                         break;
333
334                     case 2:
335                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_dark.html");
336                         break;
337
338                     case 3:
339                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_dark.html");
340                         break;
341
342                     case 4:
343                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_dark.html");
344                         break;
345
346                     case 5:
347                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_dark.html");
348                         break;
349
350                     case 6:
351                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_dark.html");
352                         break;
353                 }
354             } else {  // The light theme is applied.
355                 switch (tabNumber) {
356                     case 1:
357                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_light.html");
358                         break;
359
360                     case 2:
361                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_light.html");
362                         break;
363
364                     case 3:
365                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_light.html");
366                         break;
367
368                     case 4:
369                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_light.html");
370                         break;
371
372                     case 5:
373                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_light.html");
374                         break;
375
376                     case 6:
377                         tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_light.html");
378                         break;
379                 }
380             }
381         }
382
383         // Return the formatted `tabLayout`.
384         return tabLayout;
385     }
386 }