Bubble expand/collapse accessibility announcement

* When the bubble expands/collapses the Talkback will announce `expand/collapse <bubble title>`
* Video attached in bug comments

Bug: 283709905
Test: manual
Flag: none
Change-Id: I807b8f165bc6cc628b728405b83a555b294799d8

2 files changed, 33 insertions, 0 deletions

diff --git a/libs/WindowManager/Shell/res/values/strings.xml b/libs/WindowManager/Shell/res/values/strings.xml
index eabe3a4eca0b..b556150e2ab9 100644
--- a/libs/WindowManager/Shell/res/values/strings.xml
+++ b/libs/WindowManager/Shell/res/values/strings.xml
@@ -142,6 +142,10 @@
     <string name="bubble_accessibility_action_move_bottom_left">Move bottom left</string>
     <!-- Action in accessibility menu to move the stack of bubbles to the bottom right of the screen. [CHAR LIMIT=30]-->
     <string name="bubble_accessibility_action_move_bottom_right">Move bottom right</string>
+    <!-- Accessibility announcement when the stack of bubbles expands. [CHAR LIMIT=NONE]-->
+    <string name="bubble_accessibility_announce_expand">expand <xliff:g id="bubble_title" example="Messages">%1$s</xliff:g></string>
+    <!-- Accessibility announcement when the stack of bubbles collapses. [CHAR LIMIT=NONE]-->
+    <string name="bubble_accessibility_announce_collapse">collapse <xliff:g id="bubble_title" example="Messages">%1$s</xliff:g></string>
     <!-- Label for the button that takes the user to the notification settings for the given app. -->
     <string name="bubbles_app_settings"><xliff:g id="notification_title" example="Android Messages">%1$s</xliff:g> settings</string>
     <!-- Text used for the bubble dismiss area. Bubbles dragged to, or flung towards, this area will go away. [CHAR LIMIT=30] -->
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java b/libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java
index d10de833ab89..df77cb73f386 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java
@@ -2038,6 +2038,7 @@ public class BubbleStackView extends FrameLayout
             });
         }
         notifyExpansionChanged(mExpandedBubble, mIsExpanded);
+        announceExpandForAccessibility(mExpandedBubble, mIsExpanded);
     }
 
     /**
@@ -2054,6 +2055,34 @@ public class BubbleStackView extends FrameLayout
         }
     }
 
+    private void announceExpandForAccessibility(BubbleViewProvider bubble, boolean expanded) {
+        if (bubble instanceof Bubble) {
+            String contentDescription = getBubbleContentDescription((Bubble) bubble);
+            String message = getResources().getString(
+                    expanded
+                            ? R.string.bubble_accessibility_announce_expand
+                            : R.string.bubble_accessibility_announce_collapse, contentDescription);
+            announceForAccessibility(message);
+        }
+    }
+
+    @NonNull
+    private String getBubbleContentDescription(Bubble bubble) {
+        final String appName = bubble.getAppName();
+        final String title = bubble.getTitle() != null
+                ? bubble.getTitle()
+                : getResources().getString(R.string.notification_bubble_title);
+
+        if (appName == null || title.equals(appName)) {
+            // App bubble title equals the app name, so return only the title to avoid having
+            // content description like: `<app> from <app>`.
+            return title;
+        } else {
+            return getResources().getString(
+                    R.string.bubble_content_description_single, title, appName);
+        }
+    }
+
     private boolean isGestureNavEnabled() {
         return mContext.getResources().getInteger(
                 com.android.internal.R.integer.config_navBarInteractionMode)