Revert "[ChipGroup] Fix ChipGroup.getCheckedChipIds() returns wrong state"

This reverts commit ba9803a.

Author: pekingme

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

@@ -54,7 +54,6 @@
 import android.view.ViewParent;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityNodeInfo;
-import android.widget.CompoundButton;
 import androidx.annotation.AnimatorRes;
 import androidx.annotation.BoolRes;
 import androidx.annotation.CallSuper;
@@ -152,7 +151,6 @@ public class Chip extends AppCompatCheckBox
   @Nullable private RippleDrawable ripple;
 
   @Nullable private OnClickListener onCloseIconClickListener;
-  @Nullable private CompoundButton.OnCheckedChangeListener onCheckedChangeListener;
   @Nullable private MaterialCheckable.OnCheckedChangeListener<Chip> onCheckedChangeListenerInternal;
   private boolean deferredCheckedValue;
   private boolean closeIconPressed;
@@ -253,16 +251,6 @@ public Chip(Context context, AttributeSet attrs, int defStyleAttr) {
       setMinHeight(minTouchTargetSize);
     }
     lastLayoutDirection = ViewCompat.getLayoutDirection(this);
-
-    super.setOnCheckedChangeListener(
-        (buttonView, isChecked) -> {
-          if (onCheckedChangeListenerInternal != null) {
-            onCheckedChangeListenerInternal.onCheckedChanged(Chip.this, isChecked);
-          }
-          if (onCheckedChangeListener != null) {
-            onCheckedChangeListener.onCheckedChanged(buttonView, isChecked);
-          }
-        });
   }
 
   @Override
@@ -719,15 +707,15 @@ public void setChecked(boolean checked) {
       // Defer the setChecked() call until after initialization.
       deferredCheckedValue = checked;
     } else if (chipDrawable.isCheckable()) {
+      boolean wasChecked = isChecked();
       super.setChecked(checked);
-    }
-  }
 
-  @Override
-  public void setOnCheckedChangeListener(
-      @Nullable CompoundButton.OnCheckedChangeListener listener) {
-    // Do not call super here - the wrapped listener set in the constructor will call the listener.
-    onCheckedChangeListener = listener;
+      if (wasChecked != checked) {
+        if (onCheckedChangeListenerInternal != null) {
+          onCheckedChangeListenerInternal.onCheckedChanged(this, checked);
+        }
+      }
+    }
   }
 
   /** Register a callback to be invoked when the close icon is clicked. */

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

@@ -15,18 +15,15 @@
  */
 package com.google.android.material.chip;
 
-import android.widget.CompoundButton.OnCheckedChangeListener;
-import com.google.android.material.test.R;
+import com.google.android.material.R;
 
-import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 import android.content.Context;
 import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
-import android.widget.CompoundButton;
 import androidx.core.view.ViewCompat;
 import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
 import androidx.core.view.accessibility.AccessibilityNodeInfoCompat.CollectionInfoCompat;
@@ -199,41 +196,6 @@ public void onCheckedChanged(ChipGroup group, List<Integer> checkedIds) {
     assertThat(checkedIds).contains(second.getId());
   }
 
-  @Test
-  public void multipleSelection_chipListener() {
-    chipgroup.setSingleSelection(false);
-
-    Chip first = (Chip) chipgroup.getChildAt(0);
-    first.setOnCheckedChangeListener(
-        new OnCheckedChangeListener() {
-          @Override
-          public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-            onChipCheckedStateChanged(buttonView, isChecked);
-          }
-        });
-
-    Chip second = (Chip) chipgroup.getChildAt(1);
-    second.setOnCheckedChangeListener(
-        new OnCheckedChangeListener() {
-          @Override
-          public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
-            onChipCheckedStateChanged(buttonView, isChecked);
-          }
-        });
-
-    first.performClick();
-    getInstrumentation().waitForIdleSync();
-
-    assertThat(checkedChangeCallCount).isEqualTo(1);
-    assertThat(checkedIds).containsExactly(first.getId());
-
-    second.performClick();
-    getInstrumentation().waitForIdleSync();
-
-    assertThat(checkedChangeCallCount).isEqualTo(2);
-    assertThat(checkedIds).containsExactly(first.getId(), second.getId());
-  }
-
   @Test
   public void multiSelection_withSelectionRequired_unSelectsIfTwo() {
     chipgroup.setSingleSelection(false);
@@ -298,9 +260,4 @@ public void isNotSingleLine_initializesAccessibilityNodeInfo() {
     assertEquals(1, itemInfo.getRowIndex());
     assertTrue(itemInfo.isSelected());
   }
-
-  private void onChipCheckedStateChanged(CompoundButton chip, boolean checked) {
-    checkedChangeCallCount++;
-    checkedIds = chipgroup.getCheckedChipIds();
-  }
 }