[Snackbar] Add an accessibility pane title of "Alert"

PiperOrigin-RevId: 655638807

Author: Material Design Team

lib/java/com/google/android/material/snackbar/BaseTransientBottomBar.java

@@ -388,6 +388,8 @@ protected BaseTransientBottomBar(
 
     view.setAccessibilityLiveRegion(View.ACCESSIBILITY_LIVE_REGION_POLITE);
     view.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
+    ViewCompat.setAccessibilityPaneTitle(
+        view, getContext().getString(R.string.snackbar_accessibility_pane_title));
 
     // Make sure that we fit system windows and have a listener to apply any insets
     view.setFitsSystemWindows(true);

lib/java/com/google/android/material/snackbar/res/values/strings.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2024 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+-->
+<resources xmlns:tools="http://schemas.android.com/tools">
+  <!-- An accessibility pane title for a Snackbar. [CHAR LIMIT=NONE] -->
+  <string name="snackbar_accessibility_pane_title">Alert</string>
+</resources>

tests/javatests/com/google/android/material/snackbar/SnackbarTest.java

@@ -29,6 +29,7 @@
 import static com.google.android.material.testutils.TestUtilsActions.setLayoutDirection;
 import static org.hamcrest.Matchers.not;
 import static org.hamcrest.core.AllOf.allOf;
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
@@ -399,6 +400,16 @@ public void testMultipleCallbacksWithRemoval() throws Throwable {
         .onDismissed(snackbar, BaseTransientBottomBar.BaseCallback.DISMISS_EVENT_MANUAL);
   }
 
+  @Test
+  public void testAccessibilityPaneTitle() throws Throwable {
+    final Snackbar snackbar =
+        Snackbar.make(coordinatorLayout, MESSAGE_TEXT, Snackbar.LENGTH_INDEFINITE)
+            .setAction(ACTION_TEXT, mock(View.OnClickListener.class));
+    assertEquals(
+        snackbar.getContext().getString(R.string.snackbar_accessibility_pane_title),
+        ViewCompat.getAccessibilityPaneTitle(snackbar.getView()).toString());
+  }
+
   @Test
   public void testDefaultContext_usesAppCompat() throws Throwable {
     final Snackbar snackbar =