Add a non-dismissable verification banner

library/ui-strings/src/main/res/values/strings.xml

@@ -2717,6 +2717,8 @@
     <string name="review_unverified_sessions_description">Review to ensure your account is safe</string>
     <!-- Argument will be replaced by the other session name (e.g, Desktop, mobile) -->
     <string name="verify_this_session">Verify the new login accessing your account: %1$s</string>
+    <string name="verify_this_session_content">As of April 2026 unverified devices will not be able to send and receive messages.</string>
+    <string name="verify_now">Verify now</string>
 
     <string name="cross_signing_verify_by_text">Manually Verify by Text</string>
     <!-- TODO TO BE REMOVED -->

vector/src/main/java/im/vector/app/core/ui/views/VerifyDeviceBanner.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2026 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package im.vector.app.core.ui.views
+
+import android.content.Context
+import android.util.AttributeSet
+import androidx.constraintlayout.widget.ConstraintLayout
+import im.vector.app.R
+import im.vector.app.databinding.ViewVerifySessionBannerBinding
+
+class VerifyDeviceBanner @JvmOverloads constructor(
+        context: Context,
+        attrs: AttributeSet? = null,
+        defStyleAttr: Int = 0
+) : ConstraintLayout(context, attrs, defStyleAttr) {
+    var delegate: Delegate? = null
+
+    init {
+        setupView()
+    }
+
+    private fun setupView() {
+        inflate(context, R.layout.view_verify_session_banner, this)
+        val views = ViewVerifySessionBannerBinding.bind(this)
+        views.learnMore.setOnClickListener { delegate?.onVerificationLearnMoreClicked() }
+        views.verifyButton.setOnClickListener { delegate?.onVerifySession() }
+    }
+
+    interface Delegate {
+        fun onVerificationLearnMoreClicked()
+        fun onVerifySession()
+    }
+}

vector/src/main/java/im/vector/app/features/home/HomeActivityViewModel.kt

@@ -362,11 +362,13 @@ class HomeActivityViewModel @AssistedInject constructor(
             // cross signing keys have been reset
             // Trigger a popup to re-verify
             // Note: user can be unknown in case of logout
-            session.getUserOrDefault(session.myUserId)
-                    .toMatrixItem()
-                    .let { user ->
-                        _viewEvents.post(HomeActivityViewEvents.OnCrossSignedInvalidated(user))
-                    }
+
+            // This is now handled by the banner in the HomeFragment
+            // session.getUserOrDefault(session.myUserId)
+            //         .toMatrixItem()
+            //         .let { user ->
+            //             _viewEvents.post(HomeActivityViewEvents.OnCrossSignedInvalidated(user))
+            //         }
         }
     }
 
@@ -441,12 +443,13 @@ class HomeActivityViewModel @AssistedInject constructor(
                             val is4Ssetup = session.sharedSecretStorageService().isRecoverySetup()
                             if (hasTargetDeviceToVerifyAgainst || is4Ssetup) {
                                 // New session
-                                _viewEvents.post(
-                                        HomeActivityViewEvents.CurrentSessionNotVerified(
-                                                session.getUserOrDefault(session.myUserId).toMatrixItem(),
-                                                vectorPreferences.isOnRustCrypto() && vectorPreferences.hadExistingLegacyData()
-                                        )
-                                )
+                                // This is now handled by the banner in the HomeFragment
+                                // _viewEvents.post(
+                                //         HomeActivityViewEvents.CurrentSessionNotVerified(
+                                //                 session.getUserOrDefault(session.myUserId).toMatrixItem(),
+                                //                 vectorPreferences.isOnRustCrypto() && vectorPreferences.hadExistingLegacyData()
+                                //         )
+                                // )
                             } else {
                                 _viewEvents.post(
                                         HomeActivityViewEvents.CurrentSessionCannotBeVerified(

vector/src/main/java/im/vector/app/features/home/HomeDetailViewModel.kt

@@ -93,6 +93,7 @@ class HomeDetailViewModel @AssistedInject constructor(
         observeRoomSummaries()
         updatePstnSupportFlag()
         observeDataStore()
+        observeCrossSigningState()
         callManager.addProtocolsCheckerListener(this)
         session.flow().liveUser(session.myUserId).execute {
             copy(
@@ -101,6 +102,21 @@ class HomeDetailViewModel @AssistedInject constructor(
         }
     }
 
+    private fun observeCrossSigningState() {
+        session
+                .flow()
+                .liveCrossSigningInfo(session.myUserId)
+                .onEach { info ->
+                    val isVerified = info.getOrNull()?.isTrusted() ?: false
+                    setState {
+                        copy(
+                                isSessionVerified = isVerified,
+                        )
+                    }
+                }
+                .launchIn(viewModelScope)
+    }
+
     private fun observeDataStore() {
         vectorDataStore.pushCounterFlow.setOnEach { nbOfPush ->
             copy(

vector/src/main/java/im/vector/app/features/home/HomeDetailViewState.kt

@@ -33,7 +33,9 @@ data class HomeDetailViewState(
         val incrementalSyncRequestState: SyncRequestState.IncrementalSyncRequestState? = null,
         val pushCounter: Int = 0,
         val pstnSupportFlag: Boolean = false,
-        val forceDialPadTab: Boolean = false
+        val forceDialPadTab: Boolean = false,
+        // Set to true by default to avoid glitch
+        val isSessionVerified: Boolean = true,
 ) : MavericksState {
     val showDialPadTab = forceDialPadTab || pstnSupportFlag
 }

vector/src/main/java/im/vector/app/features/home/NewHomeDetailFragment.kt

@@ -14,6 +14,7 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
 import com.airbnb.mvrx.activityViewModel
@@ -33,6 +34,8 @@ import im.vector.app.core.resources.ColorProvider
 import im.vector.app.core.ui.views.CurrentCallsView
 import im.vector.app.core.ui.views.CurrentCallsViewPresenter
 import im.vector.app.core.ui.views.KeysBackupBanner
+import im.vector.app.core.ui.views.VerifyDeviceBanner
+import im.vector.app.core.utils.openUrlInChromeCustomTab
 import im.vector.app.databinding.FragmentNewHomeDetailBinding
 import im.vector.app.features.call.SharedKnownCallsViewModel
 import im.vector.app.features.call.VectorCallActivity
@@ -66,7 +69,8 @@ class NewHomeDetailFragment :
         KeysBackupBanner.Delegate,
         CurrentCallsView.Callback,
         OnBackPressed,
-        VectorMenuProvider {
+        VectorMenuProvider,
+        VerifyDeviceBanner.Delegate {
 
     @Inject lateinit var avatarRenderer: AvatarRenderer
     @Inject lateinit var colorProvider: ColorProvider
@@ -132,6 +136,7 @@ class NewHomeDetailFragment :
         sharedCallActionViewModel = activityViewModelProvider.get(SharedKnownCallsViewModel::class.java)
         setupToolbar()
         setupKeysBackupBanner()
+        setupVerificationBanner()
         setupActiveCallView()
         setupDebugButton()
         setupFabs()
@@ -323,6 +328,10 @@ class NewHomeDetailFragment :
         views.homeKeysBackupBanner.delegate = this
     }
 
+    private fun setupVerificationBanner() {
+        views.homeVerifyDevice.delegate = this
+    }
+
     private fun setupActiveCallView() {
         currentCallsViewPresenter.bind(views.currentCallsView, this)
     }
@@ -355,9 +364,9 @@ class NewHomeDetailFragment :
         })
     }
 
-/* ==========================================================================================
- * KeysBackupBanner Listener
- * ========================================================================================== */
+    /* ==========================================================================================
+     * KeysBackupBanner Listener
+     * ========================================================================================== */
 
     override fun onCloseClicked() {
         serverBackupStatusViewModel.handle(ServerBackupStatusAction.OnBannerClosed)
@@ -378,7 +387,7 @@ class NewHomeDetailFragment :
                 it.pushCounter,
                 vectorPreferences.developerShowDebugInfo()
         )
-
+        views.homeVerifyDevice.isGone = it.isSessionVerified
         refreshAvatar()
         hasUnreadRooms = it.hasUnreadMessages
     }
@@ -419,6 +428,21 @@ class NewHomeDetailFragment :
 
     private fun SpaceStateHandler.isRoot() = getSpaceBackstack().isEmpty()
 
+    override fun onVerificationLearnMoreClicked() {
+        openUrlInChromeCustomTab(
+                context = requireContext(),
+                session = null,
+                url = "https://docs.element.io/latest/element-support/device-verification/how-to-verify-devices",
+        )
+    }
+
+    override fun onVerifySession() {
+        (activity as? VectorBaseActivity<*>)?.let { vectorBaseActivity ->
+            vectorBaseActivity.navigator
+                    .requestSelfSessionVerification(vectorBaseActivity)
+        }
+    }
+
     companion object {
         private const val HOME_ROOM_LIST_FRAGMENT_TAG = "TAG_HOME_ROOM_LIST"
     }

vector/src/main/res/drawable/banner_background.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <solid android:color="?vctr_content_quinary" />
+
+    <corners android:radius="12dp" />
+
+</shape>

vector/src/main/res/layout/fragment_new_home_detail.xml

@@ -44,12 +44,11 @@
         <com.google.android.material.appbar.AppBarLayout
             android:id="@+id/appBarLayout"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            app:layout_constraintTop_toBottomOf="@id/syncStateView">
+            android:layout_height="wrap_content">
 
             <com.google.android.material.appbar.CollapsingToolbarLayout
-                style="?attr/collapsingToolbarLayoutMediumStyle"
                 android:id="@+id/collapsing_toolbar"
+                style="?attr/collapsingToolbarLayoutMediumStyle"
                 android:layout_width="match_parent"
                 android:layout_height="?attr/collapsingToolbarLayoutMediumSize"
                 app:layout_scrollFlags="scroll|exitUntilCollapsed">
@@ -89,13 +88,26 @@
 
         </com.google.android.material.appbar.AppBarLayout>
 
-        <androidx.fragment.app.FragmentContainerView
-            android:id="@+id/roomListContainer"
+        <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
+            android:orientation="vertical"
+            app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">
+
+            <im.vector.app.core.ui.views.VerifyDeviceBanner
+                android:id="@+id/homeVerifyDevice"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:padding="16dp"
+                android:visibility="gone"
+                tools:visibility="visible" />
+
+            <androidx.fragment.app.FragmentContainerView
+                android:id="@+id/roomListContainer"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" />
+
+        </LinearLayout>
 
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 

vector/src/main/res/layout/view_verify_session_banner.xml

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="utf-8"?>
+<merge xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="16dp"
+    tools:parentTag="androidx.constraintlayout.widget.ConstraintLayout">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/banner_background"
+        android:padding="16dp">
+
+        <TextView
+            android:id="@+id/title"
+            style="@style/Widget.Vector.TextView.HeadlineMedium"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:text="@string/crosssigning_verify_this_session"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <TextView
+            android:id="@+id/content"
+            style="@style/Widget.Vector.TextView.Body"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="4dp"
+            android:text="@string/verify_this_session_content"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/title" />
+
+        <TextView
+            android:id="@+id/learn_more"
+            style="@style/Widget.Vector.TextView.Subtitle"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="4dp"
+            android:text="@string/action_learn_more"
+            android:textColor="?android:textColorPrimary"
+            android:textStyle="bold"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/content" />
+
+        <Button
+            android:id="@+id/verify_button"
+            style="@style/Widget.Vector.Button.Positive"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/verify_now"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/learn_more" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</merge>