minSdkVersion = Android 10 (API level 29)

FlowCrypt/build.gradle.kts

@@ -40,6 +40,7 @@ android {
     versionCode = extra["appVersionCode"] as Int
     versionName = extra["appVersionName"] as String
     testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    buildConfigField("int", "MIN_SDK_VERSION", "$minSdk")
 
     /*
      The following argument makes the Android Test Orchestrator run its

FlowCrypt/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?><!--
   ~ © 2016-present FlowCrypt a.s. Limitations apply. Contact human@flowcrypt.com
-  ~ Contributors: DenBond7
+  ~ Contributors: denbond7
   -->
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
@@ -13,11 +13,6 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <!-- android.permission.ACCESS_NETWORK_STATE is used to check is internet connection available-->
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-    <!-- android.permission.WRITE_EXTERNAL_STORAGE is used to save attachments for Build.VERSION.SDK_INT <= Build.VERSION_CODES.P -->
-    <uses-permission
-        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
-        android:maxSdkVersion="28"
-        tools:ignore="ScopedStorage" />
     <!-- android.permission.WAKE_LOCK will be used by classes which extend JobIntentService -->
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <!-- Request the foreground service permission. Details here

FlowCrypt/src/main/java/com/flowcrypt/email/extensions/Context.kt

@@ -8,7 +8,6 @@ package com.flowcrypt.email.extensions
 import android.content.Context
 import android.net.ConnectivityManager
 import android.net.NetworkCapabilities
-import android.os.Build
 import android.widget.Toast
 import com.flowcrypt.email.FlowCryptApplication
 
@@ -23,18 +22,11 @@ fun Context.toast(resId: Int, duration: Int = Toast.LENGTH_SHORT) {
   Toast.makeText(this, resId, duration).show()
 }
 
-@SuppressWarnings("deprecation")
-@Suppress("DEPRECATION")
 fun Context?.hasActiveConnection(): Boolean {
   return this?.let {
     val cm = getSystemService(Context.CONNECTIVITY_SERVICE) as? ConnectivityManager
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-      val cap = cm?.getNetworkCapabilities(cm.activeNetwork) ?: return false
-      return cap.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
-    } else {
-      val activeNetwork: android.net.NetworkInfo? = cm?.activeNetworkInfo
-      activeNetwork?.isConnectedOrConnecting == true
-    }
+    val cap = cm?.getNetworkCapabilities(cm.activeNetwork) ?: return false
+    return cap.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
   } ?: false
 }
 

FlowCrypt/src/main/java/com/flowcrypt/email/extensions/android/webkit/WebViewExt.kt

@@ -1,13 +1,12 @@
 /*
  * © 2016-present FlowCrypt a.s. Limitations apply. Contact human@flowcrypt.com
- * Contributors: DenBond7
+ * Contributors: denbond7
  */
 
 package com.flowcrypt.email.extensions.android.webkit
 
 import android.content.res.Configuration
 import android.graphics.Color
-import android.os.Build
 import android.webkit.WebView
 import androidx.webkit.WebSettingsCompat
 import androidx.webkit.WebViewFeature
@@ -18,9 +17,7 @@ import androidx.webkit.WebViewFeature
 fun WebView.setupDayNight() {
   setBackgroundColor(Color.TRANSPARENT)
   if (WebViewFeature.isFeatureSupported(WebViewFeature.ALGORITHMIC_DARKENING)) {
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-      WebSettingsCompat.setAlgorithmicDarkeningAllowed(settings, true)
-    }
+    WebSettingsCompat.setAlgorithmicDarkeningAllowed(settings, true)
   } else {
     if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
       when (resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK) {

FlowCrypt/src/main/java/com/flowcrypt/email/service/attachment/AttachmentDownloadManagerService.kt

@@ -10,8 +10,6 @@ import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import android.os.Binder
-import android.os.Build
-import android.os.Environment
 import android.os.Handler
 import android.os.HandlerThread
 import android.os.IBinder
@@ -22,11 +20,8 @@ import android.os.RemoteException
 import android.provider.MediaStore
 import android.text.TextUtils
 import android.widget.Toast
-import androidx.annotation.RequiresApi
-import androidx.core.content.FileProvider
 import androidx.lifecycle.LifecycleService
 import com.flowcrypt.email.BuildConfig
-import com.flowcrypt.email.Constants
 import com.flowcrypt.email.R
 import com.flowcrypt.email.api.email.gmail.GmailApiHelper
 import com.flowcrypt.email.api.email.model.AttachmentInfo
@@ -40,7 +35,6 @@ import com.flowcrypt.email.extensions.kotlin.toHex
 import com.flowcrypt.email.security.KeysStorageImpl
 import com.flowcrypt.email.security.SecurityUtils
 import com.flowcrypt.email.security.pgp.PgpDecryptAndOrVerify
-import com.flowcrypt.email.util.FileAndDirectoryUtils
 import com.flowcrypt.email.util.GeneralUtil
 import com.flowcrypt.email.util.LogsUtil
 import com.flowcrypt.email.util.exception.ExceptionUtil
@@ -510,7 +504,7 @@ class AttachmentDownloadManagerService : LifecycleService() {
             FileUtils.copyInputStreamToFile(inputStream, attTempFile)
             attTempFile = decryptFileIfNeeded(context, attTempFile)
             if (!Thread.currentThread().isInterrupted) {
-              val uri = storeFileToSharedFolder(context, attTempFile)
+              val uri = storeFileUsingScopedStorage(context, attTempFile)
               listener?.onAttDownloaded(
                 attInfo = att.copy(
                   name = finalFileName,
@@ -600,7 +594,7 @@ class AttachmentDownloadManagerService : LifecycleService() {
         if (Thread.currentThread().isInterrupted) {
           listener?.onCanceled(att.copy(name = finalFileName))
         } else {
-          val uri = storeFileToSharedFolder(context, attTempFile)
+          val uri = storeFileUsingScopedStorage(context, attTempFile)
           listener?.onAttDownloaded(
             attInfo = att.copy(
               name = finalFileName,
@@ -615,15 +609,6 @@ class AttachmentDownloadManagerService : LifecycleService() {
       }
     }
 
-    private fun storeFileToSharedFolder(context: Context, attFile: File): Uri {
-      return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-        storeFileUsingScopedStorage(context, attFile)
-      } else {
-        storeLegacy(attFile, context)
-      }
-    }
-
-    @RequiresApi(Build.VERSION_CODES.Q)
     private fun storeFileUsingScopedStorage(context: Context, attFile: File): Uri {
       val resolver = context.contentResolver
       val mimeType = finalFileName.getPossibleAndroidMimeType()
@@ -670,43 +655,6 @@ class AttachmentDownloadManagerService : LifecycleService() {
       return fileUri
     }
 
-    /**
-     * We use this method to support saving files on Android 9 and less which uses an old approach.
-     */
-    private fun storeLegacy(attFile: File, context: Context): Uri {
-      val fileName = finalFileName
-      val flowCryptDirectoryForDownloadsName = "FlowCrypt"
-      val fileDir =
-        Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).apply {
-          if (!exists()) {
-            if (!mkdir()) {
-              error("Creating ${Environment.DIRECTORY_DOWNLOADS} failed!")
-            }
-          }
-        }
-
-      val flowCryptDirectoryForDownloads = File(fileDir, flowCryptDirectoryForDownloadsName).apply {
-        if (!exists()) {
-          if (!mkdir()) {
-            error("Creating FlowCrypt directory in ${Environment.DIRECTORY_DOWNLOADS} failed!")
-          }
-        }
-      }
-
-      var downloadedFile = File(flowCryptDirectoryForDownloads, fileName)
-      downloadedFile = if (downloadedFile.exists()) {
-        FileAndDirectoryUtils.createFileWithIncreasedIndex(flowCryptDirectoryForDownloads, fileName)
-      } else {
-        downloadedFile
-      }
-
-      finalFileName = downloadedFile.name
-      attFile.inputStream().use { srcStream ->
-        FileUtils.openOutputStream(downloadedFile).use { outStream -> srcStream.copyTo(outStream) }
-      }
-      return FileProvider.getUriForFile(context, Constants.FILE_PROVIDER_AUTHORITY, downloadedFile)
-    }
-
     fun setListener(listener: OnDownloadAttachmentListener) {
       this.listener = listener
     }

FlowCrypt/src/main/java/com/flowcrypt/email/ui/activity/fragment/MessageDetailsFragment.kt

@@ -5,19 +5,16 @@
 
 package com.flowcrypt.email.ui.activity.fragment
 
-import android.Manifest
 import android.accounts.AuthenticatorException
 import android.content.ActivityNotFoundException
 import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
 import android.content.ServiceConnection
-import android.content.pm.PackageManager
 import android.content.res.ColorStateList
 import android.graphics.Shader
 import android.graphics.drawable.GradientDrawable
 import android.graphics.drawable.LayerDrawable
-import android.os.Build
 import android.os.Bundle
 import android.os.IBinder
 import android.text.Html
@@ -33,7 +30,6 @@ import android.widget.CompoundButton
 import android.widget.ListView
 import android.widget.TextView
 import android.widget.Toast
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.annotation.ColorRes
 import androidx.appcompat.widget.PopupMenu
 import androidx.core.content.ContextCompat
@@ -182,15 +178,6 @@ class MessageDetailsFragment : BaseFragment<FragmentMessageDetailsBinding>(), Pr
     }
   }
 
-  private val requestPermissionLauncher =
-    registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted: Boolean ->
-      if (isGranted) {
-        downloadAttachment()
-      } else {
-        toast(R.string.cannot_save_attachment_without_permission, Toast.LENGTH_LONG)
-      }
-    }
-
   private val attachmentsRecyclerViewAdapter = AttachmentsRecyclerViewAdapter(
     isDeleteEnabled = false,
     attachmentActionListener = object : AttachmentsRecyclerViewAdapter.AttachmentActionListener {
@@ -2011,16 +1998,7 @@ class MessageDetailsFragment : BaseFragment<FragmentMessageDetailsBinding>(), Pr
       }
     }
 
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q ||
-      ContextCompat.checkSelfPermission(
-        requireContext(),
-        Manifest.permission.WRITE_EXTERNAL_STORAGE
-      ) == PackageManager.PERMISSION_GRANTED
-    ) {
-      downloadAttachment()
-    } else {
-      requestPermissionLauncher.launch(Manifest.permission.WRITE_EXTERNAL_STORAGE)
-    }
+    downloadAttachment()
   }
 
   companion object {

FlowCrypt/src/main/java/com/flowcrypt/email/ui/activity/fragment/ThreadDetailsFragment.kt

@@ -5,12 +5,9 @@
 
 package com.flowcrypt.email.ui.activity.fragment
 
-import android.Manifest
 import android.content.ActivityNotFoundException
 import android.content.Intent
-import android.content.pm.PackageManager
 import android.content.res.ColorStateList
-import android.os.Build
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.Menu
@@ -19,8 +16,6 @@ import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
 import android.widget.ListView
-import android.widget.Toast
-import androidx.activity.result.contract.ActivityResultContracts
 import androidx.core.content.ContextCompat
 import androidx.core.view.MenuHost
 import androidx.core.view.MenuProvider
@@ -141,16 +136,6 @@ class ThreadDetailsFragment : BaseFragment<FragmentThreadDetailsBinding>(), Prog
       }
     }
   }
-  private val requestPermissionLauncher =
-    registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted: Boolean ->
-      toast(
-        if (isGranted) {
-          R.string.permissions_granted_and_now_you_can_download_attachments
-        } else {
-          R.string.cannot_save_attachment_without_permission
-        }, Toast.LENGTH_LONG
-      )
-    }
 
   private val messagesInThreadListAdapter = MessagesInThreadListAdapter(
     object : MessagesInThreadListAdapter.AdapterListener {
@@ -1328,16 +1313,7 @@ class ThreadDetailsFragment : BaseFragment<FragmentThreadDetailsBinding>(), Prog
       )
     ) return
 
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q ||
-      ContextCompat.checkSelfPermission(
-        requireContext(),
-        Manifest.permission.WRITE_EXTERNAL_STORAGE
-      ) == PackageManager.PERMISSION_GRANTED
-    ) {
-      downloadAttachment(attachmentInfo, message)
-    } else {
-      requestPermissionLauncher.launch(Manifest.permission.WRITE_EXTERNAL_STORAGE)
-    }
+    downloadAttachment(attachmentInfo, message)
   }
 
   private fun downloadAttachment(

FlowCrypt/src/main/java/com/flowcrypt/email/ui/activity/fragment/base/BaseFragment.kt

@@ -1,13 +1,12 @@
 /*
  * © 2016-present FlowCrypt a.s. Limitations apply. Contact human@flowcrypt.com
- * Contributors: DenBond7
+ * Contributors: denbond7
  */
 
 package com.flowcrypt.email.ui.activity.fragment.base
 
 import android.content.Context
 import android.content.Intent
-import android.os.Build
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -18,7 +17,6 @@ import androidx.viewbinding.ViewBinding
 import com.flowcrypt.email.R
 import com.flowcrypt.email.database.entity.AccountEntity
 import com.flowcrypt.email.extensions.androidx.fragment.app.doBaseUISetup
-import com.flowcrypt.email.extensions.hasActiveConnection
 import com.flowcrypt.email.jetpack.lifecycle.ConnectionLifecycleObserver
 import com.flowcrypt.email.jetpack.viewmodel.AccountViewModel
 import com.flowcrypt.email.jetpack.viewmodel.RoomBasicViewModel
@@ -212,11 +210,7 @@ abstract class BaseFragment<T : ViewBinding> : Fragment(), UiUxSettings, IdlingC
   }
 
   protected fun isConnected(): Boolean {
-    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
-      connectionLifecycleObserver.connectionLiveData.value ?: false
-    } else {
-      context.hasActiveConnection()
-    }
+    return connectionLifecycleObserver.connectionLiveData.value ?: false
   }
 
   protected fun showAuthIssueHint(

FlowCrypt/src/main/res/values-ru/strings.xml

@@ -139,7 +139,6 @@
     <string name="source_has_wrong_pgp_structure">Предоставленное вами содержимое не похоже на действительный %1$s ключ PGP.</string>
     <string name="file_has_wrong_pgp_structure">Содержимое Вашего файла не похоже на действительный %1$s ключ PGP.</string>
     <string name="attachment_not_found">Вложение не найдено</string>
-    <string name="cannot_save_attachment_without_permission">Вложение нельзя сохранить без разрешения на запись во внешнее хранилище</string>
     <string name="sync">Синхронизация</string>
     <string name="switch_to_secure_email">Переключиться на безопасное сообщение</string>
     <string name="supported_public_key_not_found">Поддерживаемый открытый ключ не найден</string>
@@ -642,7 +641,6 @@
     <string name="make_backup_in_the_email_box">Сделайте резервную копию в почтовом ящике</string>
     <string name="make_backup_explanation_text">Сохранить предоставленные закрытые ключи PGP, защищенные парольной фразой, в качестве резервной копии в папке «Входящие». Это поможет Вам получить доступ к Вашим зашифрованным сообщениям с других устройств (при условии предоставление Вашей парольной фразы). Вы можете безопасно оставить его в своем почтовом ящике или заархивировать.\n\nЕсли Вам не нужна такая резервная копия, отключите эту опцию.</string>
     <string name="draft">Черновик</string>
-    <string name="permissions_granted_and_now_you_can_download_attachments">Разрешения предоставлены и теперь Вы можете загружать вложения.</string>
     <string name="delete_draft">Удалить черновик?</string>
     <string name="thread_was_deleted_or_moved">Переписка удалена или перемещена</string>
     <plurals name="drafts_count">

FlowCrypt/src/main/res/values-uk/strings.xml

@@ -140,7 +140,6 @@
     <string name="source_has_wrong_pgp_structure">Наданий Вами вміст не схожий на дійсний %1$s ключ PGP.</string>
     <string name="file_has_wrong_pgp_structure">Вміст Вашого файлу не схожий на дійсний %1$s ключ PGP.</string>
     <string name="attachment_not_found">Вкладення не знайдене</string>
-    <string name="cannot_save_attachment_without_permission">Вкладення неможливо зберегти без дозволу на запис до зовнішнього сховища</string>
     <string name="sync">Синхронізація</string>
     <string name="switch_to_secure_email">Переключитись на безпечне повідомлення</string>
     <string name="supported_public_key_not_found">Підтримуваний відкритий ключ не знайдено</string>
@@ -643,7 +642,6 @@
     <string name="make_backup_in_the_email_box">Зробіть резервну копію в електронній скриньці</string>
     <string name="make_backup_explanation_text">Зберегти надані секретні ключі PGP, захищені парольною фразою, як резервну копію в папці «Вхідні». Це допоможе отримати Вам доступ до Ваших зашифрованих повідомлень з інших пристроїв (за умови надання Вашої парольної фрази). Ви можете спокійно залишити його у папці "Вхідні" або заархівувати.\n\nЯкщо Вам не потрібна така резервна копія, вимкніть цю опцію.</string>
     <string name="draft">Чорновик</string>
-    <string name="permissions_granted_and_now_you_can_download_attachments">Дозволи надано, і тепер ви можете завантажити вкладені файли</string>
     <string name="delete_draft">Видалити чернетку?</string>
     <string name="thread_was_deleted_or_moved">Бесіду видалено або переміщено</string>
     <plurals name="drafts_count">

FlowCrypt/src/main/res/values/strings.xml

@@ -124,8 +124,6 @@
     <string name="waiting_to_load">Waiting to load</string>
     <string name="download_complete">Download complete</string>
     <string name="template_attachment_already_loading">Attachment \"%1$s\" is already loading</string>
-    <string name="cannot_save_attachment_without_permission">The attachment cannot be saved without the write external
-        storage permission</string>
     <string name="can_not_attach_this_file">Can\'t attach this file!</string>
     <string name="template_warning_max_total_attachments_size">Total size of added attachments should be under
         %1$s</string>
@@ -653,7 +651,6 @@
     <string name="make_backup_in_the_email_box">Make a backup in the email box</string>
     <string name="make_backup_explanation_text">Save the given passphrase-protected PGP private keys as a backup in the inbox. It will help you access your encrypted messages from other devices (along with your pass phrase). You can safely leave it in your inbox or archive it.\n\nIf you don\'t need to have such a backup, please disable this option.</string>
     <string name="draft">Draft</string>
-    <string name="permissions_granted_and_now_you_can_download_attachments">The permissions have been granted, and now you can download attachments</string>
     <string name="delete_draft">Delete draft?</string>
     <string name="thread_was_deleted_or_moved">The thread was deleted or moved</string>
     <plurals name="drafts_count">