Added IME flag asking Android not to process user input in secured chat rooms

CHANGELOG.md

@@ -18,6 +18,7 @@ Group changes to describe their impact on the project, as follows:
 - Allow video recording in chat file sharing
 - Unread messages indicator in chat conversation that separates read & unread messages
 - Notify incoming/outgoing calls on bluetooth devices using self-managed connections from telecom manager API (disables SDK audio focus)
+- Ask Android to not process what user types in an encrypted chat room to improve privacy, see [IME_FLAG_NO_PERSONALIZED_LEARNING](https://developer.android.com/reference/android/view/inputmethod/EditorInfo#IME_FLAG_NO_PERSONALIZED_LEARNING)
 - New video call UI on foldable device like Galaxy Z Fold
 - Setting to automatically record all calls
 

app/src/main/java/org/linphone/activities/main/chat/viewmodels/ChatMessageSendingViewModel.kt

@@ -19,6 +19,7 @@
  */
 package org.linphone.activities.main.chat.viewmodels
 
+import android.view.inputmethod.EditorInfo
 import android.widget.Toast
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
@@ -37,6 +38,7 @@ import org.linphone.LinphoneApplication.Companion.corePreferences
 import org.linphone.R
 import org.linphone.activities.main.chat.data.ChatMessageAttachmentData
 import org.linphone.activities.main.chat.data.ChatMessageData
+import org.linphone.compatibility.Compatibility
 import org.linphone.core.*
 import org.linphone.core.tools.Log
 import org.linphone.utils.AppUtils
@@ -88,6 +90,13 @@ class ChatMessageSendingViewModel(private val chatRoom: ChatRoom) : ViewModel()
 
     val voiceRecordPlayingPosition = MutableLiveData<Int>()
 
+    val imeFlags: Int = if (chatRoom.hasCapability(ChatRoomCapabilities.Encrypted.toInt())) {
+        // IME_FLAG_NO_PERSONALIZED_LEARNING is only available on Android 8 and newer
+        Compatibility.getImeFlagsForSecureChatRoom()
+    } else {
+        EditorInfo.IME_FLAG_NO_EXTRACT_UI
+    }
+
     private val recorder: Recorder
 
     private var voiceRecordAudioFocusRequest: AudioFocusRequestCompat? = null

app/src/main/java/org/linphone/compatibility/Api21Compatibility.kt

@@ -34,6 +34,7 @@ import android.os.Vibrator
 import android.provider.MediaStore
 import android.provider.Settings
 import android.view.WindowManager
+import android.view.inputmethod.EditorInfo
 import org.linphone.R
 import org.linphone.core.Content
 import org.linphone.core.tools.Log
@@ -45,6 +46,7 @@ import org.linphone.utils.PermissionHelper
 @TargetApi(21)
 class Api21Compatibility {
     companion object {
+        @SuppressLint("MissingPermission")
         fun getDeviceName(context: Context): String {
             var name = BluetoothAdapter.getDefaultAdapter().name
             if (name == null) {
@@ -212,5 +214,9 @@ class Api21Compatibility {
         fun getUpdateCurrentPendingIntentFlag(): Int {
             return PendingIntent.FLAG_UPDATE_CURRENT
         }
+
+        fun getImeFlagsForSecureChatRoom(): Int {
+            return EditorInfo.IME_FLAG_NO_EXTRACT_UI
+        }
     }
 }

app/src/main/java/org/linphone/compatibility/Api26Compatibility.kt

@@ -32,6 +32,7 @@ import android.media.AudioAttributes
 import android.os.VibrationEffect
 import android.os.Vibrator
 import android.view.WindowManager
+import android.view.inputmethod.EditorInfo
 import androidx.core.app.NotificationManagerCompat
 import org.linphone.R
 import org.linphone.core.tools.Log
@@ -149,5 +150,9 @@ class Api26Compatibility {
                 code
             )
         }
+
+        fun getImeFlagsForSecureChatRoom(): Int {
+            return EditorInfo.IME_FLAG_NO_EXTRACT_UI or EditorInfo.IME_FLAG_NO_PERSONALIZED_LEARNING
+        }
     }
 }

app/src/main/java/org/linphone/compatibility/Compatibility.kt

@@ -261,5 +261,12 @@ class Compatibility {
             }
             return Api21Compatibility.getUpdateCurrentPendingIntentFlag()
         }
+
+        fun getImeFlagsForSecureChatRoom(): Int {
+            if (Version.sdkAboveOrEqual(Version.API26_O_80)) {
+                return Api26Compatibility.getImeFlagsForSecureChatRoom()
+            }
+            return Api21Compatibility.getImeFlagsForSecureChatRoom()
+        }
     }
 }

app/src/main/res/layout/chat_bubble_activity.xml

@@ -97,6 +97,7 @@
                 android:id="@+id/message"
                 android:enabled="@{!chatSendingViewModel.isReadOnly}"
                 android:text="@={chatSendingViewModel.textToSend}"
+                android:imeOptions="@{chatSendingViewModel.imeFlags}"
                 android:hint="@string/chat_room_sending_message_hint"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
@@ -106,7 +107,6 @@
                 android:layout_marginStart="10dp"
                 android:layout_weight="1"
                 android:background="@drawable/resizable_text_field"
-                android:imeOptions="flagNoExtractUi"
                 android:inputType="textShortMessage|textMultiLine|textAutoComplete|textAutoCorrect|textCapSentences"
                 android:maxLines="6"
                 android:padding="5dp"

app/src/main/res/layout/chat_room_detail_fragment.xml

@@ -229,6 +229,7 @@
                     android:id="@+id/message"
                     android:text="@={chatSendingViewModel.textToSend}"
                     android:hint="@{chatSendingViewModel.isPendingAnswer ? @string/chat_room_sending_reply_hint : @string/chat_room_sending_message_hint}"
+                    android:imeOptions="@{chatSendingViewModel.imeFlags}"
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_gravity="center_vertical"
@@ -236,7 +237,6 @@
                     android:layout_marginBottom="10dp"
                     android:layout_weight="1"
                     android:background="@drawable/resizable_text_field"
-                    android:imeOptions="flagNoExtractUi"
                     android:inputType="textShortMessage|textMultiLine|textAutoComplete|textAutoCorrect|textCapSentences"
                     android:maxLines="6"
                     android:padding="5dp"