Bug 1823316 - Use 'Snackbar' themed Dialog to notify on making app full-screen

app/src/main/java/org/mozilla/fenix/browser/BaseBrowserFragment.kt

@@ -17,7 +17,6 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.accessibility.AccessibilityManager
-import android.widget.Toast
 import androidx.activity.result.ActivityResultLauncher
 import androidx.annotation.CallSuper
 import androidx.annotation.VisibleForTesting
@@ -76,6 +75,7 @@ import mozilla.components.feature.prompts.PromptFeature
 import mozilla.components.feature.prompts.PromptFeature.Companion.PIN_REQUEST
 import mozilla.components.feature.prompts.address.AddressDelegate
 import mozilla.components.feature.prompts.creditcard.CreditCardDelegate
+import mozilla.components.feature.prompts.dialog.FullScreenNotificationDialog
 import mozilla.components.feature.prompts.identitycredential.DialogColors
 import mozilla.components.feature.prompts.identitycredential.DialogColorsProvider
 import mozilla.components.feature.prompts.login.LoginDelegate
@@ -1493,9 +1493,11 @@ abstract class BaseBrowserFragment :
         if (inFullScreen) {
             // Close find in page bar if opened
             findInPageIntegration.onBackPressed()
-            Toast
-                .makeText(requireContext(), R.string.full_screen_notification, Toast.LENGTH_SHORT)
-                .show()
+
+            FullScreenNotificationDialog(R.layout.full_screen_notification_dialog).show(
+                parentFragmentManager,
+            )
+
             activity?.enterImmersiveMode()
             (view as? SwipeGestureLayout)?.isSwipeEnabled = false
             browserToolbarView.collapse()

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

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
+<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/full_screen_notification"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="8dp"
+    android:background="@drawable/fenix_snackbar_background"
+    android:elevation="4dp"
+    android:minHeight="48dp"
+    android:orientation="horizontal"
+    android:paddingStart="16dp"
+    android:paddingEnd="16dp">
+
+    <TextView
+        android:id="@+id/full_screen_notification_text"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:ellipsize="end"
+        android:letterSpacing="0.05"
+        android:maxLines="2"
+        android:minHeight="46dp"
+        android:paddingTop="8dp"
+        android:paddingBottom="8dp"
+        android:text="@string/full_screen_notification"
+        android:textAlignment="textStart"
+        android:textColor="@color/photonWhite"
+        android:textSize="18sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="@string/full_screen_notification" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>