app/src/main/java/com/stoutner/privacybrowser/fragments/AboutVersionFragment.kt

   1 /*
   2  * Copyright © 2016-2021 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.PackageManager
  30 import android.net.Uri
  31 import android.os.Build
  32 import android.os.Bundle
  33 import android.os.Handler
  34 import android.os.Looper
  35 import android.provider.OpenableColumns
  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 androidx.activity.result.contract.ActivityResultContracts
  49 import androidx.fragment.app.Fragment
  50 import androidx.webkit.WebViewCompat
  51
  52 import com.google.android.material.snackbar.Snackbar
  53
  54 import com.stoutner.privacybrowser.R
  55 import com.stoutner.privacybrowser.BuildConfig
  56 import com.stoutner.privacybrowser.asynctasks.SaveAboutVersionImage
  57
  58 import java.io.ByteArrayInputStream
  59 import java.io.InputStream
  60 import java.lang.Exception
  61 import java.nio.charset.StandardCharsets
  62 import java.security.cert.CertificateException
  63 import java.security.cert.CertificateFactory
  64 import java.security.cert.X509Certificate
  65 import java.text.DateFormat
  66 import java.text.NumberFormat
  67
  68 import kotlin.text.StringBuilder
  69
  70 // Define the class constants.
  71 private const val BLOCKLIST_VERSIONS = "blocklist_versions"
  72 private const val MEBIBYTE = 1048576
  73
  74 class AboutVersionFragment : Fragment() {
  75     // Define the class variables.
  76     private var updateMemoryUsageBoolean = true
  77
  78     // Declare the class variables.
  79     private lateinit var blocklistVersions: Array<String>
  80     private lateinit var aboutVersionLayout: View
  81     private lateinit var appConsumedMemoryLabel: String
  82     private lateinit var appAvailableMemoryLabel: String
  83     private lateinit var appTotalMemoryLabel: String
  84     private lateinit var appMaximumMemoryLabel: String
  85     private lateinit var systemConsumedMemoryLabel: String
  86     private lateinit var systemAvailableMemoryLabel: String
  87     private lateinit var systemTotalMemoryLabel: String
  88     private lateinit var runtime: Runtime
  89     private lateinit var activityManager: ActivityManager
  90     private lateinit var memoryInfo: ActivityManager.MemoryInfo
  91     private lateinit var numberFormat: NumberFormat
  92     private lateinit var blueColorSpan: ForegroundColorSpan
  93
  94     // Declare the class views.
  95     private lateinit var privacyBrowserTextView: TextView
  96     private lateinit var versionTextView: TextView
  97     private lateinit var hardwareTextView: TextView
  98     private lateinit var brandTextView: TextView
  99     private lateinit var manufacturerTextView: TextView
 100     private lateinit var modelTextView: TextView
 101     private lateinit var deviceTextView: TextView
 102     private lateinit var bootloaderTextView: TextView
 103     private lateinit var radioTextView: TextView
 104     private lateinit var softwareTextView: TextView
 105     private lateinit var androidTextView: TextView
 106     private lateinit var securityPatchTextView: TextView
 107     private lateinit var buildTextView: TextView
 108     private lateinit var webViewProviderTextView: TextView
 109     private lateinit var webViewVersionTextView: TextView
 110     private lateinit var orbotTextView: TextView
 111     private lateinit var i2pTextView: TextView
 112     private lateinit var openKeychainTextView: TextView
 113     private lateinit var memoryUsageTextView: TextView
 114     private lateinit var appConsumedMemoryTextView: TextView
 115     private lateinit var appAvailableMemoryTextView: TextView
 116     private lateinit var appTotalMemoryTextView: TextView
 117     private lateinit var appMaximumMemoryTextView: TextView
 118     private lateinit var systemConsumedMemoryTextView: TextView
 119     private lateinit var systemAvailableMemoryTextView: TextView
 120     private lateinit var systemTotalMemoryTextView: TextView
 121     private lateinit var blocklistsTextView: TextView
 122     private lateinit var easyListTextView: TextView
 123     private lateinit var easyPrivacyTextView: TextView
 124     private lateinit var fanboyAnnoyanceTextView: TextView
 125     private lateinit var fanboySocialTextView: TextView
 126     private lateinit var ultraListTextView: TextView
 127     private lateinit var ultraPrivacyTextView: TextView
 128     private lateinit var packageSignatureTextView: TextView
 129     private lateinit var certificateIssuerDnTextView: TextView
 130     private lateinit var certificateSubjectDnTextView: TextView
 131     private lateinit var certificateStartDateTextView: TextView
 132     private lateinit var certificateEndDateTextView: TextView
 133     private lateinit var certificateVersionTextView: TextView
 134     private lateinit var certificateSerialNumberTextView: TextView
 135     private lateinit var certificateSignatureAlgorithmTextView: TextView
 136
 137     companion object {
 138         fun createTab(blocklistVersions: Array<String>): AboutVersionFragment {
 139             // Create an arguments bundle.
 140             val argumentsBundle = Bundle()
 141
 142             // Store the arguments in the bundle.
 143             argumentsBundle.putStringArray(BLOCKLIST_VERSIONS, blocklistVersions)
 144
 145             // Create a new instance of the tab fragment.
 146             val aboutVersionFragment = AboutVersionFragment()
 147
 148             // Add the arguments bundle to the fragment.
 149             aboutVersionFragment.arguments = argumentsBundle
 150
 151             // Return the new fragment.
 152             return aboutVersionFragment
 153         }
 154     }
 155
 156     // Define the save about version text activity result launcher.  It must be defined before `onCreate()` is run or the app will crash.
 157     private val saveAboutVersionTextActivityResultLauncher = registerForActivityResult(ActivityResultContracts.CreateDocument()) { fileNameUri: Uri? ->
 158         // Only save the file if the URI is not null, which happens if the user exited the file picker by pressing back.
 159         if (fileNameUri != null) {
 160             try {
 161                 // Get the about version string.
 162                 val aboutVersionString = getAboutVersionString()
 163
 164                 // Open an output stream.
 165                 val outputStream = requireActivity().contentResolver.openOutputStream(fileNameUri)!!
 166
 167                 // Write the about version string to the output stream.
 168                 outputStream.write(aboutVersionString.toByteArray(StandardCharsets.UTF_8))
 169
 170                 // Close the output stream.
 171                 outputStream.close()
 172
 173                 // Initialize the file name string from the file name URI last path segment.
 174                 var fileNameString = fileNameUri.lastPathSegment
 175
 176                 // Query the exact file name if the API >= 26.
 177                 if (Build.VERSION.SDK_INT >= 26) {
 178                     // Get a cursor from the content resolver.
 179                     val contentResolverCursor = requireActivity().contentResolver.query(fileNameUri, null, null, null)!!
 180
 181                     // Move to the first row.
 182                     contentResolverCursor.moveToFirst()
 183
 184                     // Get the file name from the cursor.
 185                     fileNameString = contentResolverCursor.getString(contentResolverCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME))
 186
 187                     // Close the cursor.
 188                     contentResolverCursor.close()
 189                 }
 190
 191                 // Display a snackbar with the saved logcat information.
 192                 Snackbar.make(aboutVersionLayout, getString(R.string.saved, fileNameString), Snackbar.LENGTH_SHORT).show()
 193             } catch (exception: Exception) {
 194                 // Display a snackbar with the error message.
 195                 Snackbar.make(aboutVersionLayout, getString(R.string.error_saving_file) + "  " + exception.toString(), Snackbar.LENGTH_INDEFINITE).show()
 196             }
 197         }
 198     }
 199
 200     // Define the save about version image activity result launcher.  It must be defined before `onCreate()` is run or the app will crash.
 201     private val saveAboutVersionImageActivityResultLauncher = registerForActivityResult(ActivityResultContracts.CreateDocument()) { fileNameUri: Uri? ->
 202         // Only save the file if the URI is not null, which happens if the user exited the file picker by pressing back.
 203         if (fileNameUri != null) {
 204             // Save the about version image.
 205             SaveAboutVersionImage(requireActivity(), fileNameUri, aboutVersionLayout.findViewById(R.id.about_version_linearlayout)).execute()
 206         }
 207     }
 208
 209     override fun onCreate(savedInstanceState: Bundle?) {
 210         // Run the default commands.
 211         super.onCreate(savedInstanceState)
 212
 213         // Store the arguments in class variables.
 214         blocklistVersions = requireArguments().getStringArray(BLOCKLIST_VERSIONS)!!
 215
 216         // Enable the options menu for this fragment.
 217         setHasOptionsMenu(true)
 218     }
 219
 220     override fun onCreateView(layoutInflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
 221         // 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.
 222         aboutVersionLayout = layoutInflater.inflate(R.layout.about_version_scrollview, container, false)
 223
 224         // Get handles for the views.
 225         privacyBrowserTextView = aboutVersionLayout.findViewById(R.id.privacy_browser_textview)
 226         versionTextView = aboutVersionLayout.findViewById(R.id.version)
 227         hardwareTextView = aboutVersionLayout.findViewById(R.id.hardware)
 228         brandTextView = aboutVersionLayout.findViewById(R.id.brand)
 229         manufacturerTextView = aboutVersionLayout.findViewById(R.id.manufacturer)
 230         modelTextView = aboutVersionLayout.findViewById(R.id.model)
 231         deviceTextView = aboutVersionLayout.findViewById(R.id.device)
 232         bootloaderTextView = aboutVersionLayout.findViewById(R.id.bootloader)
 233         radioTextView = aboutVersionLayout.findViewById(R.id.radio)
 234         softwareTextView = aboutVersionLayout.findViewById(R.id.software)
 235         androidTextView = aboutVersionLayout.findViewById(R.id.android)
 236         securityPatchTextView = aboutVersionLayout.findViewById(R.id.security_patch)
 237         buildTextView = aboutVersionLayout.findViewById(R.id.build)
 238         webViewProviderTextView = aboutVersionLayout.findViewById(R.id.webview_provider)
 239         webViewVersionTextView = aboutVersionLayout.findViewById(R.id.webview_version)
 240         orbotTextView = aboutVersionLayout.findViewById(R.id.orbot)
 241         i2pTextView = aboutVersionLayout.findViewById(R.id.i2p)
 242         openKeychainTextView = aboutVersionLayout.findViewById(R.id.open_keychain)
 243         memoryUsageTextView = aboutVersionLayout.findViewById(R.id.memory_usage)
 244         appConsumedMemoryTextView = aboutVersionLayout.findViewById(R.id.app_consumed_memory)
 245         appAvailableMemoryTextView = aboutVersionLayout.findViewById(R.id.app_available_memory)
 246         appTotalMemoryTextView = aboutVersionLayout.findViewById(R.id.app_total_memory)
 247         appMaximumMemoryTextView = aboutVersionLayout.findViewById(R.id.app_maximum_memory)
 248         systemConsumedMemoryTextView = aboutVersionLayout.findViewById(R.id.system_consumed_memory)
 249         systemAvailableMemoryTextView = aboutVersionLayout.findViewById(R.id.system_available_memory)
 250         systemTotalMemoryTextView = aboutVersionLayout.findViewById(R.id.system_total_memory)
 251         blocklistsTextView = aboutVersionLayout.findViewById(R.id.blocklists)
 252         easyListTextView = aboutVersionLayout.findViewById(R.id.easylist)
 253         easyPrivacyTextView = aboutVersionLayout.findViewById(R.id.easyprivacy)
 254         fanboyAnnoyanceTextView = aboutVersionLayout.findViewById(R.id.fanboy_annoyance)
 255         fanboySocialTextView = aboutVersionLayout.findViewById(R.id.fanboy_social)
 256         ultraListTextView = aboutVersionLayout.findViewById(R.id.ultralist)
 257         ultraPrivacyTextView = aboutVersionLayout.findViewById(R.id.ultraprivacy)
 258         packageSignatureTextView = aboutVersionLayout.findViewById(R.id.package_signature)
 259         certificateIssuerDnTextView = aboutVersionLayout.findViewById(R.id.certificate_issuer_dn)
 260         certificateSubjectDnTextView = aboutVersionLayout.findViewById(R.id.certificate_subject_dn)
 261         certificateStartDateTextView = aboutVersionLayout.findViewById(R.id.certificate_start_date)
 262         certificateEndDateTextView = aboutVersionLayout.findViewById(R.id.certificate_end_date)
 263         certificateVersionTextView = aboutVersionLayout.findViewById(R.id.certificate_version)
 264         certificateSerialNumberTextView = aboutVersionLayout.findViewById(R.id.certificate_serial_number)
 265         certificateSignatureAlgorithmTextView = aboutVersionLayout.findViewById(R.id.certificate_signature_algorithm)
 266
 267         // Setup the labels.
 268         val version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + BuildConfig.VERSION_CODE + ")"
 269         val brandLabel = getString(R.string.brand) + "  "
 270         val manufacturerLabel = getString(R.string.manufacturer) + "  "
 271         val modelLabel = getString(R.string.model) + "  "
 272         val deviceLabel = getString(R.string.device) + "  "
 273         val bootloaderLabel = getString(R.string.bootloader) + "  "
 274         val androidLabel = getString(R.string.android) + "  "
 275         val buildLabel = getString(R.string.build) + "  "
 276         val webViewVersionLabel = getString(R.string.webview_version) + "  "
 277         appConsumedMemoryLabel = getString(R.string.app_consumed_memory) + "  "
 278         appAvailableMemoryLabel = getString(R.string.app_available_memory) + "  "
 279         appTotalMemoryLabel = getString(R.string.app_total_memory) + "  "
 280         appMaximumMemoryLabel = getString(R.string.app_maximum_memory) + "  "
 281         systemConsumedMemoryLabel = getString(R.string.system_consumed_memory) + "  "
 282         systemAvailableMemoryLabel = getString(R.string.system_available_memory) + "  "
 283         systemTotalMemoryLabel = getString(R.string.system_total_memory) + "  "
 284         val easyListLabel = getString(R.string.easylist_label) + "  "
 285         val easyPrivacyLabel = getString(R.string.easyprivacy_label) + "  "
 286         val fanboyAnnoyanceLabel = getString(R.string.fanboy_annoyance_label) + "  "
 287         val fanboySocialLabel = getString(R.string.fanboy_social_label) + "  "
 288         val ultraListLabel = getString(R.string.ultralist_label) + "  "
 289         val ultraPrivacyLabel = getString(R.string.ultraprivacy_label) + "  "
 290         val issuerDNLabel = getString(R.string.issuer_dn) + "  "
 291         val subjectDNLabel = getString(R.string.subject_dn) + "  "
 292         val startDateLabel = getString(R.string.start_date) + "  "
 293         val endDateLabel = getString(R.string.end_date) + "  "
 294         val certificateVersionLabel = getString(R.string.certificate_version) + "  "
 295         val serialNumberLabel = getString(R.string.serial_number) + "  "
 296         val signatureAlgorithmLabel = getString(R.string.signature_algorithm) + "  "
 297
 298         // 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.
 299         // Once the minimum API >= 26 this can be accomplished with the WebView package info.
 300         val webViewLayout = layoutInflater.inflate(R.layout.bare_webview, container, false)
 301         val tabLayoutWebView = webViewLayout.findViewById<WebView>(R.id.bare_webview)
 302         val userAgentString = tabLayoutWebView.settings.userAgentString
 303
 304         // Get the device's information and store it in strings.
 305         val brand = Build.BRAND
 306         val manufacturer = Build.MANUFACTURER
 307         val model = Build.MODEL
 308         val device = Build.DEVICE
 309         val bootloader = Build.BOOTLOADER
 310         val radio = Build.getRadioVersion()
 311         val android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Build.VERSION.SDK_INT + ")"
 312         val build = Build.DISPLAY
 313         // Select the substring that begins after `Chrome/` and goes until the next ` `.
 314         val webView = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")))
 315
 316         // Get the Orbot version name if Orbot is installed.
 317         val orbot: String = try {
 318             // Store the version name.
 319             requireContext().packageManager.getPackageInfo("org.torproject.android", 0).versionName
 320         } catch (exception: PackageManager.NameNotFoundException) {  // Orbot is not installed.
 321             // Store an empty string.
 322             ""
 323         }
 324
 325         // Get the I2P version name if I2P is installed.
 326         val i2p: String = try {
 327             // Store the version name.
 328             requireContext().packageManager.getPackageInfo("net.i2p.android.router", 0).versionName
 329         } catch (exception: PackageManager.NameNotFoundException) {  // I2P is not installed.
 330             // Store an empty string.
 331             ""
 332         }
 333
 334         // Get the OpenKeychain version name if it is installed.
 335         val openKeychain: String = try {
 336             // Store the version name.
 337             requireContext().packageManager.getPackageInfo("org.sufficientlysecure.keychain", 0).versionName
 338         } catch (exception: PackageManager.NameNotFoundException) {  // OpenKeychain is not installed.
 339             // Store an empty string.
 340             ""
 341         }
 342
 343         // Create a spannable string builder for the hardware and software text views that need multiple colors of text.
 344         val brandStringBuilder = SpannableStringBuilder(brandLabel + brand)
 345         val manufacturerStringBuilder = SpannableStringBuilder(manufacturerLabel + manufacturer)
 346         val modelStringBuilder = SpannableStringBuilder(modelLabel + model)
 347         val deviceStringBuilder = SpannableStringBuilder(deviceLabel + device)
 348         val bootloaderStringBuilder = SpannableStringBuilder(bootloaderLabel + bootloader)
 349         val androidStringBuilder = SpannableStringBuilder(androidLabel + android)
 350         val buildStringBuilder = SpannableStringBuilder(buildLabel + build)
 351         val webViewVersionStringBuilder = SpannableStringBuilder(webViewVersionLabel + webView)
 352         val easyListStringBuilder = SpannableStringBuilder(easyListLabel + blocklistVersions[0])
 353         val easyPrivacyStringBuilder = SpannableStringBuilder(easyPrivacyLabel + blocklistVersions[1])
 354         val fanboyAnnoyanceStringBuilder = SpannableStringBuilder(fanboyAnnoyanceLabel + blocklistVersions[2])
 355         val fanboySocialStringBuilder = SpannableStringBuilder(fanboySocialLabel + blocklistVersions[3])
 356         val ultraListStringBuilder = SpannableStringBuilder(ultraListLabel + blocklistVersions[4])
 357         val ultraPrivacyStringBuilder = SpannableStringBuilder(ultraPrivacyLabel + blocklistVersions[5])
 358
 359         // Set the blue color span according to the theme.  The deprecated `getColor()` must be used until the minimum API >= 23.
 360         blueColorSpan = ForegroundColorSpan(resources.getColor(R.color.about_version_blue_text))
 361
 362         // Set the spans to display the device information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 363         brandStringBuilder.setSpan(blueColorSpan, brandLabel.length, brandStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 364         manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length, manufacturerStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 365         modelStringBuilder.setSpan(blueColorSpan, modelLabel.length, modelStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 366         deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length, deviceStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 367         bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length, bootloaderStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 368         androidStringBuilder.setSpan(blueColorSpan, androidLabel.length, androidStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 369         buildStringBuilder.setSpan(blueColorSpan, buildLabel.length, buildStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 370         webViewVersionStringBuilder.setSpan(blueColorSpan, webViewVersionLabel.length, webViewVersionStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 371         easyListStringBuilder.setSpan(blueColorSpan, easyListLabel.length, easyListStringBuilder.length, Spanned.SPAN_INCLUSIVE_EXCLUSIVE)
 372         easyPrivacyStringBuilder.setSpan(blueColorSpan, easyPrivacyLabel.length, easyPrivacyStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 373         fanboyAnnoyanceStringBuilder.setSpan(blueColorSpan, fanboyAnnoyanceLabel.length, fanboyAnnoyanceStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 374         fanboySocialStringBuilder.setSpan(blueColorSpan, fanboySocialLabel.length, fanboySocialStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 375         ultraListStringBuilder.setSpan(blueColorSpan, ultraListLabel.length, ultraListStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 376         ultraPrivacyStringBuilder.setSpan(blueColorSpan, ultraPrivacyLabel.length, ultraPrivacyStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 377
 378         // Display the strings in the text boxes.
 379         versionTextView.text = version
 380         brandTextView.text = brandStringBuilder
 381         manufacturerTextView.text = manufacturerStringBuilder
 382         modelTextView.text = modelStringBuilder
 383         deviceTextView.text = deviceStringBuilder
 384         bootloaderTextView.text = bootloaderStringBuilder
 385         androidTextView.text = androidStringBuilder
 386         buildTextView.text = buildStringBuilder
 387         webViewVersionTextView.text = webViewVersionStringBuilder
 388         easyListTextView.text = easyListStringBuilder
 389         easyPrivacyTextView.text = easyPrivacyStringBuilder
 390         fanboyAnnoyanceTextView.text = fanboyAnnoyanceStringBuilder
 391         fanboySocialTextView.text = fanboySocialStringBuilder
 392         ultraListTextView.text = ultraListStringBuilder
 393         ultraPrivacyTextView.text = ultraPrivacyStringBuilder
 394
 395         // Only populate the radio text view if there is a radio in the device.
 396         // 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>
 397         if (radio != null && radio.isNotEmpty()) {
 398             // Setup the label.
 399             val radioLabel = getString(R.string.radio) + "  "
 400
 401             // Create a spannable string builder.
 402             val radioStringBuilder = SpannableStringBuilder(radioLabel + radio)
 403
 404             // Set the span to display the radio in blue.
 405             radioStringBuilder.setSpan(blueColorSpan, radioLabel.length, radioStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 406
 407             // Display the string in the text view.
 408             radioTextView.text = radioStringBuilder
 409         } else {  // This device does not have a radio.
 410             // Hide the radio text view.
 411             radioTextView.visibility = View.GONE
 412         }
 413
 414         // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
 415         if (Build.VERSION.SDK_INT >= 23) {
 416             // Setup the label.
 417             val securityPatchLabel = getString(R.string.security_patch) + "  "
 418
 419             // Get the security patch version.
 420             val securityPatch = Build.VERSION.SECURITY_PATCH
 421
 422             // Create a spannable string builder.
 423             val securityPatchStringBuilder = SpannableStringBuilder(securityPatchLabel + securityPatch)
 424
 425             // Set the span to display the security patch version in blue.
 426             securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length, securityPatchStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 427
 428             // Display the string in the text view.
 429             securityPatchTextView.text = securityPatchStringBuilder
 430         } else {  // The API < 23.
 431             // Hide the security patch text view.
 432             securityPatchTextView.visibility = View.GONE
 433         }
 434
 435         // Only populate the WebView provider if the SDK >= 21.
 436         if (Build.VERSION.SDK_INT >= 21) {
 437             // Create the WebView provider label.
 438             val webViewProviderLabel = getString(R.string.webview_provider) + "  "
 439
 440             // Get the current WebView package info.
 441             val webViewPackageInfo = WebViewCompat.getCurrentWebViewPackage(requireContext())!!
 442
 443             // Get the WebView provider name.
 444             val webViewPackageName = webViewPackageInfo.packageName
 445
 446             // Create the spannable string builder.
 447             val webViewProviderStringBuilder = SpannableStringBuilder(webViewProviderLabel + webViewPackageName)
 448
 449             // Apply the coloration.
 450             webViewProviderStringBuilder.setSpan(blueColorSpan, webViewProviderLabel.length, webViewProviderStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 451
 452             // Display the WebView provider.
 453             webViewProviderTextView.text = webViewProviderStringBuilder
 454         } else {  // The API < 21.
 455             // Hide the WebView provider text view.
 456             webViewProviderTextView.visibility = View.GONE
 457         }
 458
 459         // Only populate the Orbot text view if it is installed.
 460         if (orbot.isNotEmpty()) {
 461             // Setup the label.
 462             val orbotLabel = getString(R.string.orbot) + "  "
 463
 464             // Create a spannable string builder.
 465             val orbotStringBuilder = SpannableStringBuilder(orbotLabel + orbot)
 466
 467             // Set the span to display the Orbot version.
 468             orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length, orbotStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 469
 470             // Display the string in the text view.
 471             orbotTextView.text = orbotStringBuilder
 472         } else {  // Orbot is not installed.
 473             // Hide the Orbot text view.
 474             orbotTextView.visibility = View.GONE
 475         }
 476
 477         // Only populate the I2P text view if it is installed.
 478         if (i2p.isNotEmpty()) {
 479             // Setup the label.
 480             val i2pLabel = getString(R.string.i2p) + "  "
 481
 482             // Create a spannable string builder.
 483             val i2pStringBuilder = SpannableStringBuilder(i2pLabel + i2p)
 484
 485             // Set the span to display the I2P version.
 486             i2pStringBuilder.setSpan(blueColorSpan, i2pLabel.length, i2pStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 487
 488             // Display the string in the text view.
 489             i2pTextView.text = i2pStringBuilder
 490         } else {  // I2P is not installed.
 491             // Hide the I2P text view.
 492             i2pTextView.visibility = View.GONE
 493         }
 494
 495         // Only populate the OpenKeychain text view if it is installed.
 496         if (openKeychain.isNotEmpty()) {
 497             // Setup the label.
 498             val openKeychainLabel = getString(R.string.openkeychain) + "  "
 499
 500             // Create a spannable string builder.
 501             val openKeychainStringBuilder = SpannableStringBuilder(openKeychainLabel + openKeychain)
 502
 503             // Set the span to display the OpenKeychain version.
 504             openKeychainStringBuilder.setSpan(blueColorSpan, openKeychainLabel.length, openKeychainStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 505
 506             // Display the string in the text view.
 507             openKeychainTextView.text = openKeychainStringBuilder
 508         } else {  //OpenKeychain is not installed.
 509             // Hide the OpenKeychain text view.
 510             openKeychainTextView.visibility = View.GONE
 511         }
 512
 513         // Display the package signature.
 514         try {
 515             // Get the first package signature.  Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
 516             // Once the minimum API >= 28, `GET_SIGNING_CERTIFICATES` can be used instead.
 517             @SuppressLint("PackageManagerGetSignatures") val packageSignature = requireContext().packageManager.getPackageInfo(requireContext().packageName,PackageManager.GET_SIGNATURES)
 518                 .signatures[0]
 519
 520             // Convert the signature to a byte array input stream.
 521             val certificateByteArrayInputStream: InputStream = ByteArrayInputStream(packageSignature.toByteArray())
 522
 523             // Display the certificate information on the screen.
 524             try {
 525                 // Instantiate a certificate factory.
 526                 val certificateFactory = CertificateFactory.getInstance("X509")
 527
 528                 // Generate an X509 certificate.
 529                 val x509Certificate = certificateFactory.generateCertificate(certificateByteArrayInputStream) as X509Certificate
 530
 531                 // Store the individual sections of the certificate.
 532                 val issuerDNPrincipal = x509Certificate.issuerDN
 533                 val subjectDNPrincipal = x509Certificate.subjectDN
 534                 val startDate = x509Certificate.notBefore
 535                 val endDate = x509Certificate.notAfter
 536                 val certificateVersion = x509Certificate.version
 537                 val serialNumberBigInteger = x509Certificate.serialNumber
 538                 val signatureAlgorithmNameString = x509Certificate.sigAlgName
 539
 540                 // Create a spannable string builder for each text view that needs multiple colors of text.
 541                 val issuerDNStringBuilder = SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString())
 542                 val subjectDNStringBuilder = SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString())
 543                 val startDateStringBuilder = SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate))
 544                 val endDataStringBuilder = SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate))
 545                 val certificateVersionStringBuilder = SpannableStringBuilder(certificateVersionLabel + certificateVersion)
 546                 val serialNumberStringBuilder = SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger)
 547                 val signatureAlgorithmStringBuilder = SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString)
 548
 549                 // Setup the spans to display the device information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 550                 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length, issuerDNStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 551                 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length, subjectDNStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 552                 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length, startDateStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 553                 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length, endDataStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 554                 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length, certificateVersionStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 555                 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length, serialNumberStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 556                 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length, signatureAlgorithmStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 557
 558                 // Display the strings in the text boxes.
 559                 certificateIssuerDnTextView.text = issuerDNStringBuilder
 560                 certificateSubjectDnTextView.text = subjectDNStringBuilder
 561                 certificateStartDateTextView.text = startDateStringBuilder
 562                 certificateEndDateTextView.text = endDataStringBuilder
 563                 certificateVersionTextView.text = certificateVersionStringBuilder
 564                 certificateSerialNumberTextView.text = serialNumberStringBuilder
 565                 certificateSignatureAlgorithmTextView.text = signatureAlgorithmStringBuilder
 566             } catch (certificateException: CertificateException) {
 567                 // Do nothing if there is a certificate error.
 568             }
 569
 570             // Get a handle for the runtime.
 571             runtime = Runtime.getRuntime()
 572
 573             // Get a handle for the activity manager.
 574             activityManager = requireActivity().getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
 575
 576             // Instantiate a memory info variable.
 577             memoryInfo = ActivityManager.MemoryInfo()
 578
 579             // Define a number format.
 580             numberFormat = NumberFormat.getInstance()
 581
 582             // Set the minimum and maximum number of fraction digits.
 583             numberFormat.minimumFractionDigits = 2
 584             numberFormat.maximumFractionDigits = 2
 585
 586             // Update the memory usage.
 587             updateMemoryUsage(requireActivity())
 588         } catch (e: PackageManager.NameNotFoundException) {
 589             // Do nothing if the package manager says Privacy Browser isn't installed.
 590         }
 591
 592         // Scroll the tab if the saved instance state is not null.
 593         if (savedInstanceState != null) {
 594             aboutVersionLayout.post {
 595                 aboutVersionLayout.scrollX = savedInstanceState.getInt("scroll_x")
 596                 aboutVersionLayout.scrollY = savedInstanceState.getInt("scroll_y")
 597             }
 598         }
 599
 600         // Return the tab layout.
 601         return aboutVersionLayout
 602     }
 603
 604     override fun onCreateOptionsMenu(menu: Menu, menuInflater: MenuInflater) {
 605         // Inflate the about version menu.
 606         menuInflater.inflate(R.menu.about_version_options_menu, menu)
 607
 608         // Run the default commands.
 609         super.onCreateOptionsMenu(menu, menuInflater)
 610     }
 611
 612     override fun onOptionsItemSelected(menuItem: MenuItem): Boolean {
 613         // Run the appropriate commands.
 614         when (menuItem.itemId) {
 615             R.id.copy -> {  // Copy.
 616                 // Get the about version string.
 617                 val aboutVersionString = getAboutVersionString()
 618
 619                 // Get a handle for the clipboard manager.
 620                 val clipboardManager = (requireActivity().getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager)
 621
 622                 // Save the about version string in a clip data.
 623                 val aboutVersionClipData = ClipData.newPlainText(getString(R.string.about), aboutVersionString)
 624
 625                 // Place the clip data on the clipboard.
 626                 clipboardManager.setPrimaryClip(aboutVersionClipData)
 627
 628                 // Display a snackbar.
 629                 Snackbar.make(aboutVersionLayout, R.string.version_info_copied, Snackbar.LENGTH_SHORT).show()
 630
 631                 // Consume the event.
 632                 return true
 633             }
 634
 635             R.id.share -> {  // Share.
 636                 // Get the about version string.
 637                 val aboutString = getAboutVersionString()
 638
 639                 // Create an email intent.
 640                 val emailIntent = Intent(Intent.ACTION_SEND)
 641
 642                 // Add the about version string to the intent.
 643                 emailIntent.putExtra(Intent.EXTRA_TEXT, aboutString)
 644
 645                 // Set the MIME type.
 646                 emailIntent.type = "text/plain"
 647
 648                 // Set the intent to open in a new task.
 649                 emailIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
 650
 651                 // Make it so.
 652                 startActivity(Intent.createChooser(emailIntent, getString(R.string.share)))
 653
 654                 // Consume the event.
 655                 return true
 656             }
 657
 658             R.id.save_text -> {  // Save text.
 659                 // Open the file picker.
 660                 saveAboutVersionTextActivityResultLauncher.launch(getString(R.string.privacy_browser_version_txt, BuildConfig.VERSION_NAME))
 661
 662                 // Consume the event.
 663                 return true
 664             }
 665
 666             R.id.save_image -> {  // Save image.
 667                 // Open the file picker.
 668                 saveAboutVersionImageActivityResultLauncher.launch(getString(R.string.privacy_browser_version_png, BuildConfig.VERSION_NAME))
 669
 670                 // Consume the event.
 671                 return true
 672             }
 673             else -> {  // The home button was selected.
 674                 // Run the parents class on return.
 675                 return super.onOptionsItemSelected(menuItem)
 676             }
 677         }
 678     }
 679
 680     override fun onSaveInstanceState(savedInstanceState: Bundle) {
 681         // Run the default commands.
 682         super.onSaveInstanceState(savedInstanceState)
 683
 684         // Save the scroll positions.
 685         savedInstanceState.putInt("scroll_x", aboutVersionLayout.scrollX)
 686         savedInstanceState.putInt("scroll_y", aboutVersionLayout.scrollY)
 687     }
 688
 689     override fun onPause() {
 690         // Run the default commands.
 691         super.onPause()
 692
 693         // Pause the updating of the memory usage.
 694         updateMemoryUsageBoolean = false
 695     }
 696
 697     override fun onResume() {
 698         // Run the default commands.
 699         super.onResume()
 700
 701         // Resume the updating of the memory usage.
 702         updateMemoryUsageBoolean = true
 703     }
 704
 705     fun updateMemoryUsage(activity: Activity) {
 706         try {
 707             // Update the memory usage if enabled.
 708             if (updateMemoryUsageBoolean) {
 709                 // Populate the memory info variable.
 710                 activityManager.getMemoryInfo(memoryInfo)
 711
 712                 // Get the app memory information.
 713                 val appAvailableMemoryLong = runtime.freeMemory()
 714                 val appTotalMemoryLong = runtime.totalMemory()
 715                 val appMaximumMemoryLong = runtime.maxMemory()
 716
 717                 // Calculate the app consumed memory.
 718                 val appConsumedMemoryLong = appTotalMemoryLong - appAvailableMemoryLong
 719
 720                 // Get the system memory information.
 721                 val systemTotalMemoryLong = memoryInfo.totalMem
 722                 val systemAvailableMemoryLong = memoryInfo.availMem
 723
 724                 // Calculate the system consumed memory.
 725                 val systemConsumedMemoryLong = systemTotalMemoryLong - systemAvailableMemoryLong
 726
 727                 // Convert the memory information into mebibytes.
 728                 val appConsumedMemoryFloat = appConsumedMemoryLong.toFloat() / MEBIBYTE
 729                 val appAvailableMemoryFloat = appAvailableMemoryLong.toFloat() / MEBIBYTE
 730                 val appTotalMemoryFloat = appTotalMemoryLong.toFloat() / MEBIBYTE
 731                 val appMaximumMemoryFloat = appMaximumMemoryLong.toFloat() / MEBIBYTE
 732                 val systemConsumedMemoryFloat = systemConsumedMemoryLong.toFloat() / MEBIBYTE
 733                 val systemAvailableMemoryFloat = systemAvailableMemoryLong.toFloat() / MEBIBYTE
 734                 val systemTotalMemoryFloat = systemTotalMemoryLong.toFloat() / MEBIBYTE
 735
 736                 // Get the mebibyte string.
 737                 val mebibyte = getString(R.string.mebibyte)
 738
 739                 // Calculate the mebibyte length.
 740                 val mebibyteLength = mebibyte.length
 741
 742                 // Create spannable string builders.
 743                 val appConsumedMemoryStringBuilder = SpannableStringBuilder(appConsumedMemoryLabel + numberFormat.format(appConsumedMemoryFloat.toDouble()) + " " + mebibyte)
 744                 val appAvailableMemoryStringBuilder = SpannableStringBuilder(appAvailableMemoryLabel + numberFormat.format(appAvailableMemoryFloat.toDouble()) + " " + mebibyte)
 745                 val appTotalMemoryStringBuilder = SpannableStringBuilder(appTotalMemoryLabel + numberFormat.format(appTotalMemoryFloat.toDouble()) + " " + mebibyte)
 746                 val appMaximumMemoryStringBuilder = SpannableStringBuilder(appMaximumMemoryLabel + numberFormat.format(appMaximumMemoryFloat.toDouble()) + " " + mebibyte)
 747                 val systemConsumedMemoryStringBuilder = SpannableStringBuilder(systemConsumedMemoryLabel + numberFormat.format(systemConsumedMemoryFloat.toDouble()) + " " + mebibyte)
 748                 val systemAvailableMemoryStringBuilder = SpannableStringBuilder(systemAvailableMemoryLabel + numberFormat.format(systemAvailableMemoryFloat.toDouble()) + " " + mebibyte)
 749                 val systemTotalMemoryStringBuilder = SpannableStringBuilder(systemTotalMemoryLabel + numberFormat.format(systemTotalMemoryFloat.toDouble()) + " " + mebibyte)
 750
 751                 // Setup the spans to display the memory information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 752                 appConsumedMemoryStringBuilder.setSpan(blueColorSpan, appConsumedMemoryLabel.length, appConsumedMemoryStringBuilder.length - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 753                 appAvailableMemoryStringBuilder.setSpan(blueColorSpan, appAvailableMemoryLabel.length, appAvailableMemoryStringBuilder.length - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 754                 appTotalMemoryStringBuilder.setSpan(blueColorSpan, appTotalMemoryLabel.length, appTotalMemoryStringBuilder.length - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 755                 appMaximumMemoryStringBuilder.setSpan(blueColorSpan, appMaximumMemoryLabel.length, appMaximumMemoryStringBuilder.length - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 756                 systemConsumedMemoryStringBuilder.setSpan(blueColorSpan, systemConsumedMemoryLabel.length, systemConsumedMemoryStringBuilder.length - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 757                 systemAvailableMemoryStringBuilder.setSpan(blueColorSpan, systemAvailableMemoryLabel.length, systemAvailableMemoryStringBuilder.length - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 758                 systemTotalMemoryStringBuilder.setSpan(blueColorSpan, systemTotalMemoryLabel.length, systemTotalMemoryStringBuilder.length - mebibyteLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
 759
 760                 // Display the string in the text boxes.
 761                 appConsumedMemoryTextView.text = appConsumedMemoryStringBuilder
 762                 appAvailableMemoryTextView.text = appAvailableMemoryStringBuilder
 763                 appTotalMemoryTextView.text = appTotalMemoryStringBuilder
 764                 appMaximumMemoryTextView.text = appMaximumMemoryStringBuilder
 765                 systemConsumedMemoryTextView.text = systemConsumedMemoryStringBuilder
 766                 systemAvailableMemoryTextView.text = systemAvailableMemoryStringBuilder
 767                 systemTotalMemoryTextView.text = systemTotalMemoryStringBuilder
 768             }
 769
 770             // Schedule another memory update if the activity has not been destroyed.
 771             if (!activity.isDestroyed) {
 772                 // Create a handler to update the memory usage.
 773                 val updateMemoryUsageHandler = Handler(Looper.getMainLooper())
 774
 775                 // Create a runnable to update the memory usage.
 776                 val updateMemoryUsageRunnable = Runnable { updateMemoryUsage(activity) }
 777
 778                 // Update the memory usage after 1000 milliseconds
 779                 updateMemoryUsageHandler.postDelayed(updateMemoryUsageRunnable, 1000)
 780             }
 781         } catch (exception: Exception) {
 782             // Do nothing.
 783         }
 784     }
 785
 786     fun getAboutVersionString(): String {
 787         // Initialize an about version string builder.
 788         val aboutVersionStringBuilder = StringBuilder()
 789
 790         // Populate the about version string builder.
 791         aboutVersionStringBuilder.append(privacyBrowserTextView.text)
 792         aboutVersionStringBuilder.append("\n")
 793         aboutVersionStringBuilder.append(versionTextView.text)
 794         aboutVersionStringBuilder.append("\n\n")
 795         aboutVersionStringBuilder.append(hardwareTextView.text)
 796         aboutVersionStringBuilder.append("\n")
 797         aboutVersionStringBuilder.append(brandTextView.text)
 798         aboutVersionStringBuilder.append("\n")
 799         aboutVersionStringBuilder.append(manufacturerTextView.text)
 800         aboutVersionStringBuilder.append("\n")
 801         aboutVersionStringBuilder.append(modelTextView.text)
 802         aboutVersionStringBuilder.append("\n")
 803         aboutVersionStringBuilder.append(deviceTextView.text)
 804         aboutVersionStringBuilder.append("\n")
 805         aboutVersionStringBuilder.append(bootloaderTextView.text)
 806         aboutVersionStringBuilder.append("\n")
 807         if (radioTextView.visibility == View.VISIBLE) {
 808             aboutVersionStringBuilder.append(radioTextView.text)
 809             aboutVersionStringBuilder.append("\n")
 810         }
 811         aboutVersionStringBuilder.append("\n")
 812         aboutVersionStringBuilder.append(softwareTextView.text)
 813         aboutVersionStringBuilder.append("\n")
 814         aboutVersionStringBuilder.append(androidTextView.text)
 815         aboutVersionStringBuilder.append("\n")
 816         if (securityPatchTextView.visibility == View.VISIBLE) {
 817             aboutVersionStringBuilder.append(securityPatchTextView.text)
 818             aboutVersionStringBuilder.append("\n")
 819         }
 820         aboutVersionStringBuilder.append(buildTextView.text)
 821         aboutVersionStringBuilder.append("\n")
 822         if (webViewProviderTextView.visibility == View.VISIBLE) {
 823             aboutVersionStringBuilder.append(webViewProviderTextView.text)
 824             aboutVersionStringBuilder.append("\n")
 825         }
 826         aboutVersionStringBuilder.append(webViewVersionTextView.text)
 827         aboutVersionStringBuilder.append("\n")
 828         if (orbotTextView.visibility == View.VISIBLE) {
 829             aboutVersionStringBuilder.append(orbotTextView.text)
 830             aboutVersionStringBuilder.append("\n")
 831         }
 832         if (i2pTextView.visibility == View.VISIBLE) {
 833             aboutVersionStringBuilder.append(i2pTextView.text)
 834             aboutVersionStringBuilder.append("\n")
 835         }
 836         if (openKeychainTextView.visibility == View.VISIBLE) {
 837             aboutVersionStringBuilder.append(openKeychainTextView.text)
 838             aboutVersionStringBuilder.append("\n")
 839         }
 840         aboutVersionStringBuilder.append("\n")
 841         aboutVersionStringBuilder.append(memoryUsageTextView.text)
 842         aboutVersionStringBuilder.append("\n")
 843         aboutVersionStringBuilder.append(appConsumedMemoryTextView.text)
 844         aboutVersionStringBuilder.append("\n")
 845         aboutVersionStringBuilder.append(appAvailableMemoryTextView.text)
 846         aboutVersionStringBuilder.append("\n")
 847         aboutVersionStringBuilder.append(appTotalMemoryTextView.text)
 848         aboutVersionStringBuilder.append("\n")
 849         aboutVersionStringBuilder.append(appMaximumMemoryTextView.text)
 850         aboutVersionStringBuilder.append("\n")
 851         aboutVersionStringBuilder.append(systemConsumedMemoryTextView.text)
 852         aboutVersionStringBuilder.append("\n")
 853         aboutVersionStringBuilder.append(systemAvailableMemoryTextView.text)
 854         aboutVersionStringBuilder.append("\n")
 855         aboutVersionStringBuilder.append(systemTotalMemoryTextView.text)
 856         aboutVersionStringBuilder.append("\n\n")
 857         aboutVersionStringBuilder.append(blocklistsTextView.text)
 858         aboutVersionStringBuilder.append("\n")
 859         aboutVersionStringBuilder.append(easyListTextView.text)
 860         aboutVersionStringBuilder.append("\n")
 861         aboutVersionStringBuilder.append(easyPrivacyTextView.text)
 862         aboutVersionStringBuilder.append("\n")
 863         aboutVersionStringBuilder.append(fanboyAnnoyanceTextView.text)
 864         aboutVersionStringBuilder.append("\n")
 865         aboutVersionStringBuilder.append(fanboySocialTextView.text)
 866         aboutVersionStringBuilder.append("\n")
 867         aboutVersionStringBuilder.append(ultraListTextView.text)
 868         aboutVersionStringBuilder.append("\n")
 869         aboutVersionStringBuilder.append(ultraPrivacyTextView.text)
 870         aboutVersionStringBuilder.append("\n\n")
 871         aboutVersionStringBuilder.append(packageSignatureTextView.text)
 872         aboutVersionStringBuilder.append("\n")
 873         aboutVersionStringBuilder.append(certificateIssuerDnTextView.text)
 874         aboutVersionStringBuilder.append("\n")
 875         aboutVersionStringBuilder.append(certificateSubjectDnTextView.text)
 876         aboutVersionStringBuilder.append("\n")
 877         aboutVersionStringBuilder.append(certificateStartDateTextView.text)
 878         aboutVersionStringBuilder.append("\n")
 879         aboutVersionStringBuilder.append(certificateEndDateTextView.text)
 880         aboutVersionStringBuilder.append("\n")
 881         aboutVersionStringBuilder.append(certificateVersionTextView.text)
 882         aboutVersionStringBuilder.append("\n")
 883         aboutVersionStringBuilder.append(certificateSerialNumberTextView.text)
 884         aboutVersionStringBuilder.append("\n")
 885         aboutVersionStringBuilder.append(certificateSignatureAlgorithmTextView.text)
 886
 887         // Return the string.
 888         return aboutVersionStringBuilder.toString()
 889     }
 890 }