[FloatingActionButton] Add an accessibility role to FloatingActionButton and ExtendedFloatingActionButton.

PiperOrigin-RevId: 663363115

Author: Material Design Team

lib/java/com/google/android/material/floatingactionbutton/ExtendedFloatingActionButton.java

@@ -532,6 +532,11 @@ public void setPadding(int left, int top, int right, int bottom) {
     }
   }
 
+  @Override
+  public CharSequence getAccessibilityClassName() {
+    return FloatingActionButton.ACCESSIBIILTY_FAB_ROLE;
+  }
+
   /**
    * Add a listener that will be invoked when this ExtendedFloatingActionButton is shown. See {@link
    * AnimatorListener}.

lib/java/com/google/android/material/floatingactionbutton/FloatingActionButton.java

@@ -110,6 +110,8 @@ public class FloatingActionButton extends VisibilityAwareImageButton
         Shapeable,
         CoordinatorLayout.AttachedBehavior {
 
+  static final String ACCESSIBIILTY_FAB_ROLE =
+      "com.google.android.material.floatingactionbutton.FloatingActionButton";
   private static final String LOG_TAG = "FloatingActionButton";
   private static final String EXPANDABLE_WIDGET_HELPER_KEY = "expandableWidgetHelper";
   private static final int DEF_STYLE_RES = R.style.Widget_Design_FloatingActionButton;
@@ -936,6 +938,11 @@ public boolean onTouchEvent(@NonNull MotionEvent ev) {
     return super.onTouchEvent(ev);
   }
 
+  @Override
+  public CharSequence getAccessibilityClassName() {
+    return ACCESSIBIILTY_FAB_ROLE;
+  }
+
   /**
    * Behavior designed for use with {@link FloatingActionButton} instances. Its main function is to
    * move {@link FloatingActionButton} views so that any displayed {@link

tests/javatests/com/google/android/material/floatingactionbutton/FloatingActionButtonTest.java

@@ -46,6 +46,7 @@
 import static com.google.android.material.testutils.TestUtilsMatchers.withFabContentHeight;
 import static com.google.android.material.testutils.TestUtilsMatchers.withFabCustomSize;
 import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertEquals;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -309,4 +310,12 @@ public void testSetCustomSize() {
         .perform(setCustomSize(20))
         .check(matches(withFabCustomSize(20)));
   }
+
+  @Test
+  @SmallTest
+  public void testA11yClassName() {
+    FloatingActionButton fab = activityTestRule.getActivity().findViewById(R.id.fab_standard);
+    assertEquals(
+        FloatingActionButton.ACCESSIBIILTY_FAB_ROLE, fab.getAccessibilityClassName().toString());
+  }
 }