2 * Copyright © 2016-2020 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.pm.PackageInfo;
25 import android.content.pm.PackageManager;
26 import android.content.pm.Signature;
27 import android.content.res.Configuration;
28 import android.os.Build;
29 import android.os.Bundle;
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;
41 import androidx.webkit.WebViewCompat;
43 import com.stoutner.privacybrowser.BuildConfig;
44 import com.stoutner.privacybrowser.R;
46 import java.io.ByteArrayInputStream;
47 import java.io.InputStream;
48 import java.math.BigInteger;
49 import java.security.Principal;
50 import java.security.cert.CertificateException;
51 import java.security.cert.CertificateFactory;
52 import java.security.cert.X509Certificate;
53 import java.text.DateFormat;
54 import java.util.Date;
56 public class AboutTabFragment extends Fragment {
57 // Define the class variables.
58 private int tabNumber;
59 private String[] blocklistVersions;
60 private View tabLayout;
62 public static AboutTabFragment createTab(int tabNumber, String[] blocklistVersions) {
64 Bundle argumentsBundle = new Bundle();
66 // Store the tab number in the bundle.
67 argumentsBundle.putInt("tab_number", tabNumber);
68 argumentsBundle.putStringArray("blocklist_versions", blocklistVersions);
70 // Create a new instance of the tab fragment.
71 AboutTabFragment aboutTabFragment = new AboutTabFragment();
73 // Add the arguments bundle to the fragment.
74 aboutTabFragment.setArguments(argumentsBundle);
76 // Return the new fragment.
77 return aboutTabFragment;
81 public void onCreate(Bundle savedInstanceState) {
82 // Run the default commands.
83 super.onCreate(savedInstanceState);
85 // Get a handle for the arguments.
86 Bundle arguments = getArguments();
88 // Remove the incorrect lint warning below that arguments might be null.
89 assert arguments != null;
91 // Store the arguments in class variables.
92 tabNumber = getArguments().getInt("tab_number");
93 blocklistVersions = getArguments().getStringArray("blocklist_versions");
97 public View onCreateView(@NonNull LayoutInflater layoutInflater, ViewGroup container, Bundle savedInstanceState) {
98 // Get a handle for the context and assert that it isn't null.
99 Context context = getContext();
100 assert context != null;
102 // Get the current theme status.
103 int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
105 // Load the tabs. Tab numbers start at 0.
106 if (tabNumber == 0) { // Load the about tab.
107 // 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.
108 tabLayout = layoutInflater.inflate(R.layout.about_tab_version, container, false);
110 // Get handles for the text views.
111 TextView versionTextView = tabLayout.findViewById(R.id.version);
112 TextView brandTextView = tabLayout.findViewById(R.id.brand);
113 TextView manufacturerTextView = tabLayout.findViewById(R.id.manufacturer);
114 TextView modelTextView = tabLayout.findViewById(R.id.model);
115 TextView deviceTextView = tabLayout.findViewById(R.id.device);
116 TextView bootloaderTextView = tabLayout.findViewById(R.id.bootloader);
117 TextView radioTextView = tabLayout.findViewById(R.id.radio);
118 TextView androidTextView = tabLayout.findViewById(R.id.android);
119 TextView securityPatchTextView = tabLayout.findViewById(R.id.security_patch);
120 TextView buildTextView = tabLayout.findViewById(R.id.build);
121 TextView webViewProviderTextView = tabLayout.findViewById(R.id.webview_provider);
122 TextView webViewVersionTextView = tabLayout.findViewById(R.id.webview_version);
123 TextView orbotTextView = tabLayout.findViewById(R.id.orbot);
124 TextView i2pTextView = tabLayout.findViewById(R.id.i2p);
125 TextView openKeychainTextView = tabLayout.findViewById(R.id.open_keychain);
126 TextView easyListTextView = tabLayout.findViewById(R.id.easylist);
127 TextView easyPrivacyTextView = tabLayout.findViewById(R.id.easyprivacy);
128 TextView fanboyAnnoyanceTextView = tabLayout.findViewById(R.id.fanboy_annoyance);
129 TextView fanboySocialTextView = tabLayout.findViewById(R.id.fanboy_social);
130 TextView ultraListTextView = tabLayout.findViewById(R.id.ultralist);
131 TextView ultraPrivacyTextView = tabLayout.findViewById(R.id.ultraprivacy);
132 TextView certificateIssuerDNTextView = tabLayout.findViewById(R.id.certificate_issuer_dn);
133 TextView certificateSubjectDNTextView = tabLayout.findViewById(R.id.certificate_subject_dn);
134 TextView certificateStartDateTextView = tabLayout.findViewById(R.id.certificate_start_date);
135 TextView certificateEndDateTextView = tabLayout.findViewById(R.id.certificate_end_date);
136 TextView certificateVersionTextView = tabLayout.findViewById(R.id.certificate_version);
137 TextView certificateSerialNumberTextView = tabLayout.findViewById(R.id.certificate_serial_number);
138 TextView certificateSignatureAlgorithmTextView = tabLayout.findViewById(R.id.certificate_signature_algorithm);
141 String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + BuildConfig.VERSION_CODE + ")";
142 String brandLabel = getString(R.string.brand) + " ";
143 String manufacturerLabel = getString(R.string.manufacturer) + " ";
144 String modelLabel = getString(R.string.model) + " ";
145 String deviceLabel = getString(R.string.device) + " ";
146 String bootloaderLabel = getString(R.string.bootloader) + " ";
147 String androidLabel = getString(R.string.android) + " ";
148 String buildLabel = getString(R.string.build) + " ";
149 String webViewVersionLabel = getString(R.string.webview_version) + " ";
150 String easyListLabel = getString(R.string.easylist_label) + " ";
151 String easyPrivacyLabel = getString(R.string.easyprivacy_label) + " ";
152 String fanboyAnnoyanceLabel = getString(R.string.fanboy_annoyance_label) + " ";
153 String fanboySocialLabel = getString(R.string.fanboy_social_label) + " ";
154 String ultraListLabel = getString(R.string.ultralist_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 // 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.
165 // Once the minimum API >= 26 this can be accomplished with the WebView package info.
166 View webViewLayout = layoutInflater.inflate(R.layout.bare_webview, container, false);
167 WebView tabLayoutWebView = webViewLayout.findViewById(R.id.bare_webview);
168 String userAgentString = tabLayoutWebView.getSettings().getUserAgentString();
170 // Get the device's information and store it in strings.
171 String brand = Build.BRAND;
172 String manufacturer = Build.MANUFACTURER;
173 String model = Build.MODEL;
174 String device = Build.DEVICE;
175 String bootloader = Build.BOOTLOADER;
176 String radio = Build.getRadioVersion();
177 String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Build.VERSION.SDK_INT + ")";
178 String build = Build.DISPLAY;
179 // Select the substring that begins after `Chrome/` and goes until the next ` `.
180 String webView = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
182 // Get the Orbot version name if Orbot is installed.
185 // Store the version name.
186 orbot = context.getPackageManager().getPackageInfo("org.torproject.android", 0).versionName;
187 } catch (PackageManager.NameNotFoundException exception) { // Orbot is not installed.
191 // Get the I2P version name if I2P is installed.
194 // Store the version name.
195 i2p = context.getPackageManager().getPackageInfo("net.i2p.android.router", 0).versionName;
196 } catch (PackageManager.NameNotFoundException exception) { // I2P is not installed.
200 // Get the OpenKeychain version name if it is installed.
203 // Store the version name.
204 openKeychain = context.getPackageManager().getPackageInfo("org.sufficientlysecure.keychain", 0).versionName;
205 } catch (PackageManager.NameNotFoundException exception) { // OpenKeychain is not installed.
209 // Create a `SpannableStringBuilder` for the hardware and software `TextViews` that needs multiple colors of text.
210 SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
211 SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
212 SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
213 SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
214 SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
215 SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
216 SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
217 SpannableStringBuilder webViewVersionStringBuilder = new SpannableStringBuilder(webViewVersionLabel + webView);
218 SpannableStringBuilder easyListStringBuilder = new SpannableStringBuilder(easyListLabel + blocklistVersions[0]);
219 SpannableStringBuilder easyPrivacyStringBuilder = new SpannableStringBuilder(easyPrivacyLabel + blocklistVersions[1]);
220 SpannableStringBuilder fanboyAnnoyanceStringBuilder = new SpannableStringBuilder(fanboyAnnoyanceLabel + blocklistVersions[2]);
221 SpannableStringBuilder fanboySocialStringBuilder = new SpannableStringBuilder(fanboySocialLabel + blocklistVersions[3]);
222 SpannableStringBuilder ultraListStringBuilder = new SpannableStringBuilder(ultraListLabel + blocklistVersions[4]);
223 SpannableStringBuilder ultraPrivacyStringBuilder = new SpannableStringBuilder(ultraPrivacyLabel + blocklistVersions[5]);
225 // Define the blue color span variable.
226 ForegroundColorSpan blueColorSpan;
228 // Set the blue color span according to the theme. The deprecated `getResources()` must be used until the minimum API >= 23.
229 if (currentThemeStatus == Configuration.UI_MODE_NIGHT_YES) {
230 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.violet_500));
232 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
235 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
236 brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
237 manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
238 modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
239 deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
240 bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
241 androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
242 buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
243 webViewVersionStringBuilder.setSpan(blueColorSpan, webViewVersionLabel.length(), webViewVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
244 easyListStringBuilder.setSpan(blueColorSpan, easyListLabel.length(), easyListStringBuilder.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
245 easyPrivacyStringBuilder.setSpan(blueColorSpan, easyPrivacyLabel.length(), easyPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
246 fanboyAnnoyanceStringBuilder.setSpan(blueColorSpan, fanboyAnnoyanceLabel.length(), fanboyAnnoyanceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
247 fanboySocialStringBuilder.setSpan(blueColorSpan, fanboySocialLabel.length(), fanboySocialStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
248 ultraListStringBuilder.setSpan(blueColorSpan, ultraListLabel.length(), ultraListStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
249 ultraPrivacyStringBuilder.setSpan(blueColorSpan, ultraPrivacyLabel.length(), ultraPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
251 // Display the strings in the text boxes.
252 versionTextView.setText(version);
253 brandTextView.setText(brandStringBuilder);
254 manufacturerTextView.setText(manufacturerStringBuilder);
255 modelTextView.setText(modelStringBuilder);
256 deviceTextView.setText(deviceStringBuilder);
257 bootloaderTextView.setText(bootloaderStringBuilder);
258 androidTextView.setText(androidStringBuilder);
259 buildTextView.setText(buildStringBuilder);
260 webViewVersionTextView.setText(webViewVersionStringBuilder);
261 easyListTextView.setText(easyListStringBuilder);
262 easyPrivacyTextView.setText(easyPrivacyStringBuilder);
263 fanboyAnnoyanceTextView.setText(fanboyAnnoyanceStringBuilder);
264 fanboySocialTextView.setText(fanboySocialStringBuilder);
265 ultraListTextView.setText(ultraListStringBuilder);
266 ultraPrivacyTextView.setText(ultraPrivacyStringBuilder);
268 // Only populate the radio text view if there is a radio in the device.
269 if (!radio.isEmpty()) {
270 String radioLabel = getString(R.string.radio) + " ";
271 SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
272 radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
273 radioTextView.setText(radioStringBuilder);
274 } else { // This device does not have a radio.
275 radioTextView.setVisibility(View.GONE);
278 // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
279 if (Build.VERSION.SDK_INT >= 23) {
280 String securityPatchLabel = getString(R.string.security_patch) + " ";
281 String securityPatch = Build.VERSION.SECURITY_PATCH;
282 SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
283 securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
284 securityPatchTextView.setText(securityPatchStringBuilder);
285 } else { // The API < 23.
286 // Hide the security patch text view.
287 securityPatchTextView.setVisibility(View.GONE);
290 // Only populate the WebView provider if the SDK >= 21.
291 if (Build.VERSION.SDK_INT >= 21) {
292 // Create the WebView provider label.
293 String webViewProviderLabel = getString(R.string.webview_provider) + " ";
295 // Get the current WebView package info.
296 PackageInfo webViewPackageInfo = WebViewCompat.getCurrentWebViewPackage(context);
298 // Remove the warning below that the package info might be null.
299 assert webViewPackageInfo != null;
301 // Get the WebView provider name.
302 String webViewPackageName = webViewPackageInfo.packageName;
304 // Create the spannable string builder.
305 SpannableStringBuilder webViewProviderStringBuilder = new SpannableStringBuilder(webViewProviderLabel + webViewPackageName);
307 // Apply the coloration.
308 webViewProviderStringBuilder.setSpan(blueColorSpan, webViewProviderLabel.length(), webViewProviderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
310 // Display the WebView provider.
311 webViewProviderTextView.setText(webViewProviderStringBuilder);
312 } else { // The API < 21.
313 // Hide the WebView provider text view.
314 webViewProviderTextView.setVisibility(View.GONE);
317 // Only populate the Orbot text view if it is installed.
318 if (!orbot.isEmpty()) {
319 String orbotLabel = getString(R.string.orbot) + " ";
320 SpannableStringBuilder orbotStringBuilder = new SpannableStringBuilder(orbotLabel + orbot);
321 orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length(), orbotStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
322 orbotTextView.setText(orbotStringBuilder);
323 } else { // Orbot is not installed.
324 orbotTextView.setVisibility(View.GONE);
327 // Only populate the I2P text view if it is installed.
328 if (!i2p.isEmpty()) {
329 String i2pLabel = getString(R.string.i2p) + " ";
330 SpannableStringBuilder i2pStringBuilder = new SpannableStringBuilder(i2pLabel + i2p);
331 i2pStringBuilder.setSpan(blueColorSpan, i2pLabel.length(), i2pStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
332 i2pTextView.setText(i2pStringBuilder);
333 } else { // I2P is not installed.
334 i2pTextView.setVisibility(View.GONE);
337 // Only populate the OpenKeychain text view if it is installed.
338 if (!openKeychain.isEmpty()) {
339 String openKeychainLabel = getString(R.string.openkeychain) + " ";
340 SpannableStringBuilder openKeychainStringBuilder = new SpannableStringBuilder(openKeychainLabel + openKeychain);
341 openKeychainStringBuilder.setSpan(blueColorSpan, openKeychainLabel.length(), openKeychainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
342 openKeychainTextView.setText(openKeychainStringBuilder);
343 } else { //OpenKeychain is not installed.
344 openKeychainTextView.setVisibility(View.GONE);
347 // Display the package signature.
349 // Get the first package signature. Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
350 @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(),
351 PackageManager.GET_SIGNATURES).signatures[0];
353 // Convert the signature to a byte array input stream.
354 InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
356 // Display the certificate information on the screen.
358 // Instantiate a `CertificateFactory`.
359 CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
361 // Generate an `X509Certificate`.
362 X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
364 // Store the individual sections of the certificate that we are interested in.
365 Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
366 Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
367 Date startDate = x509Certificate.getNotBefore();
368 Date endDate = x509Certificate.getNotAfter();
369 int certificateVersion = x509Certificate.getVersion();
370 BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
371 String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
373 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
374 SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
375 SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
376 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
377 SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
378 SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
379 SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
380 SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
382 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
383 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
384 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
385 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
386 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
387 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
388 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
389 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
391 // Display the strings in the text boxes.
392 certificateIssuerDNTextView.setText(issuerDNStringBuilder);
393 certificateSubjectDNTextView.setText(subjectDNStringBuilder);
394 certificateStartDateTextView.setText(startDateStringBuilder);
395 certificateEndDateTextView.setText(endDataStringBuilder);
396 certificateVersionTextView.setText(certificateVersionStringBuilder);
397 certificateSerialNumberTextView.setText(serialNumberStringBuilder);
398 certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
399 } catch (CertificateException e) {
400 // Do nothing if there is a certificate error.
402 } catch (PackageManager.NameNotFoundException e) {
403 // Do nothing if `PackageManager` says Privacy Browser isn't installed.
405 } else { // load a WebView for all the other tabs. Tab numbers start at 0.
406 // 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.
407 tabLayout = layoutInflater.inflate(R.layout.bare_webview, container, false);
409 // Get a handle for `tabWebView`.
410 WebView tabWebView = (WebView) tabLayout;
412 // Load the tabs according to the theme.
413 if (currentThemeStatus == Configuration.UI_MODE_NIGHT_YES) { // The dark theme is applied.
414 // Set the background color. The deprecated `.getColor()` must be used until the minimum API >= 23.
415 tabWebView.setBackgroundColor(getResources().getColor(R.color.gray_850));
419 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_dark.html");
423 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_dark.html");
427 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_dark.html");
431 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_dark.html");
435 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_dark.html");
439 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_dark.html");
442 } else { // The light theme is applied.
445 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_light.html");
449 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_light.html");
453 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_light.html");
457 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_light.html");
461 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_light.html");
465 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_light.html");
471 // Scroll the tab if the saved instance state is not null.
472 if (savedInstanceState != null) {
473 tabLayout.post(() -> {
474 tabLayout.setScrollX(savedInstanceState.getInt("scroll_x"));
475 tabLayout.setScrollY(savedInstanceState.getInt("scroll_y"));
479 // Return the formatted `tabLayout`.
484 public void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
485 // Run the default commands.
486 super.onSaveInstanceState(savedInstanceState);
488 // Save the scroll positions if the tab layout is not null, which can happen if a tab is not currently selected.
489 if (tabLayout != null) {
490 savedInstanceState.putInt("scroll_x", tabLayout.getScrollX());
491 savedInstanceState.putInt("scroll_y", tabLayout.getScrollY());