android: protect screen (#1425)

* android: protect screen

* hide screen, translations

apps/android/app/src/main/java/chat/simplex/app/MainActivity.kt

@@ -7,6 +7,7 @@ import android.os.Bundle
 import android.os.Parcelable
 import android.os.SystemClock.elapsedRealtime
 import android.util.Log
+import android.view.WindowManager
 import androidx.activity.compose.setContent
 import androidx.activity.viewModels
 import androidx.compose.animation.core.*
@@ -73,6 +74,13 @@ class MainActivity: FragmentActivity() {
       processIntent(intent, m)
       processExternalIntent(intent, m)
     }
+    if (m.controller.appPrefs.privacyProtectScreen.get()) {
+      Log.d(TAG, "onCreate: set FLAG_SECURE")
+      window.setFlags(
+        WindowManager.LayoutParams.FLAG_SECURE,
+        WindowManager.LayoutParams.FLAG_SECURE
+      )
+    }
     setContent {
       SimpleXTheme {
         Surface(

apps/android/app/src/main/java/chat/simplex/app/model/SimpleXAPI.kt

@@ -101,6 +101,7 @@ class AppPreferences(val context: Context) {
   val performLA = mkBoolPreference(SHARED_PREFS_PERFORM_LA, false)
   val laNoticeShown = mkBoolPreference(SHARED_PREFS_LA_NOTICE_SHOWN, false)
   val webrtcIceServers = mkStrPreference(SHARED_PREFS_WEBRTC_ICE_SERVERS, null)
+  val privacyProtectScreen = mkBoolPreference(SHARED_PREFS_PRIVACY_PROTECT_SCREEN, true)
   val privacyAcceptImages = mkBoolPreference(SHARED_PREFS_PRIVACY_ACCEPT_IMAGES, true)
   val privacyTransferImagesInline = mkBoolPreference(SHARED_PREFS_PRIVACY_TRANSFER_IMAGES_INLINE, false)
   val privacyLinkPreviews = mkBoolPreference(SHARED_PREFS_PRIVACY_LINK_PREVIEWS, true)
@@ -203,6 +204,7 @@ class AppPreferences(val context: Context) {
     private const val SHARED_PREFS_PERFORM_LA = "PerformLA"
     private const val SHARED_PREFS_LA_NOTICE_SHOWN = "LANoticeShown"
     private const val SHARED_PREFS_WEBRTC_ICE_SERVERS = "WebrtcICEServers"
+    private const val SHARED_PREFS_PRIVACY_PROTECT_SCREEN = "PrivacyProtectScreen"
     private const val SHARED_PREFS_PRIVACY_ACCEPT_IMAGES = "PrivacyAcceptImages"
     private const val SHARED_PREFS_PRIVACY_TRANSFER_IMAGES_INLINE = "PrivacyTransferImagesInline"
     private const val SHARED_PREFS_PRIVACY_LINK_PREVIEWS = "PrivacyLinkPreviews"

apps/android/app/src/main/java/chat/simplex/app/views/usersettings/PrivacySettings.kt

@@ -29,6 +29,8 @@ fun PrivacySettingsView(
     AppBarTitle(stringResource(R.string.your_privacy))
     SectionView(stringResource(R.string.settings_section_title_device)) {
       ChatLockItem(chatModel.performLA, setPerformLA)
+      SectionDivider()
+      SettingsPreferenceItem(Icons.Outlined.VisibilityOff, stringResource(R.string.protect_app_screen), chatModel.controller.appPrefs.privacyProtectScreen)
     }
     SectionSpacer()
 

apps/android/app/src/main/res/values-de/strings.xml

@@ -609,6 +609,7 @@
   <!-- Privacy settings -->
   <string name="privacy_and_security">Datenschutz &amp; Sicherheit</string>
   <string name="your_privacy">Meine Privatsphäre</string>
+  <string name="protect_app_screen">***Protect app screen</string>
   <string name="auto_accept_images">Bilder automatisch akzeptieren</string>
   <string name="transfer_images_faster">Bilder schneller übertragen</string>
   <string name="send_link_previews">Link-Vorschau senden</string>

apps/android/app/src/main/res/values-ru/strings.xml

@@ -609,6 +609,7 @@
     <!-- Privacy settings -->
     <string name="privacy_and_security">Конфиденциальность</string>
     <string name="your_privacy">Конфиденциальность</string>
+    <string name="protect_app_screen">Защитить экран приложения</string>
     <string name="auto_accept_images">Автоприем изображений</string>
     <string name="transfer_images_faster">Передавать изображения быстрее</string>
     <string name="send_link_previews">Отправлять картинки ссылок</string>

apps/android/app/src/main/res/values/strings.xml

@@ -609,6 +609,7 @@
   <!-- Privacy settings -->
   <string name="privacy_and_security">Privacy &amp; security</string>
   <string name="your_privacy">Your privacy</string>
+  <string name="protect_app_screen">Protect app screen</string>
   <string name="auto_accept_images">Auto-accept images</string>
   <string name="transfer_images_faster">Transfer images faster</string>
   <string name="send_link_previews">Send link previews</string>