[Chip][a11y] Make multi-selection Chips announced as Buttons

PiperOrigin-RevId: 447993125

Author: paulfthomas

lib/java/com/google/android/material/chip/Chip.java

@@ -165,8 +165,6 @@ public class Chip extends AppCompatCheckBox
 
   @Nullable private CharSequence accessibilityClassName;
   private static final String BUTTON_ACCESSIBILITY_CLASS_NAME = "android.widget.Button";
-  private static final String COMPOUND_BUTTON_ACCESSIBILITY_CLASS_NAME =
-      "android.widget.CompoundButton";
   private static final String RADIO_BUTTON_ACCESSIBILITY_CLASS_NAME =
       "android.widget.RadioButton";
   private static final String GENERIC_VIEW_ACCESSIBILITY_CLASS_NAME = "android.view.View";
@@ -2335,7 +2333,7 @@ public CharSequence getAccessibilityClassName() {
       if (parent instanceof ChipGroup && ((ChipGroup) parent).isSingleSelection()) {
         return RADIO_BUTTON_ACCESSIBILITY_CLASS_NAME;
       } else {
-        return COMPOUND_BUTTON_ACCESSIBILITY_CLASS_NAME;
+        return BUTTON_ACCESSIBILITY_CLASS_NAME;
       }
     } else if (isClickable()) {
       return BUTTON_ACCESSIBILITY_CLASS_NAME;

lib/javatests/com/google/android/material/chip/ChipGroupTest.java

@@ -260,4 +260,17 @@ public void isNotSingleLine_initializesAccessibilityNodeInfo() {
     assertEquals(1, itemInfo.getRowIndex());
     assertTrue(itemInfo.isSelected());
   }
+
+  @Test
+  public void getChipAccessibilityClassName_multipleChecked_buttonName() {
+    Chip chip = (Chip) chipgroup.getChildAt(0);
+    assertEquals("android.widget.Button", chip.getAccessibilityClassName().toString());
+  }
+
+  @Test
+  public void getChipAccessibilityClassName_singleChecked_radioButtonName() {
+    chipgroup.setSingleSelection(true);
+    Chip chip = (Chip) chipgroup.getChildAt(0);
+    assertEquals("android.widget.RadioButton", chip.getAccessibilityClassName().toString());
+  }
 }

lib/javatests/com/google/android/material/chip/ChipTest.java

@@ -19,6 +19,7 @@
 
 import static com.google.android.material.internal.ViewUtils.dpToPx;
 import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.assertEquals;
 
 import android.content.Context;
 import android.graphics.RectF;
@@ -225,4 +226,15 @@ public void testZeroChipCornerRadius() {
         .isWithin(DELTA)
         .of(0);
   }
+
+  @Test
+  public void getChipAccessibilityClassName_clickable_buttonName() {
+    assertEquals("android.widget.Button", chip.getAccessibilityClassName().toString());
+  }
+
+  @Test
+  public void getChipAccessibilityClassName_nonClickable_viewName() {
+    chip.setClickable(false);
+    assertEquals("android.view.View", chip.getAccessibilityClassName().toString());
+  }
 }