[MaterialButton] Updated the shapes of buttons when the orientation is changed.

Resolves #4809

PiperOrigin-RevId: 772043388
(cherry picked from commit bbd942c)

Author: pekingme

lib/java/com/google/android/material/button/MaterialButtonGroup.java

@@ -131,7 +131,7 @@ public class MaterialButtonGroup extends LinearLayout {
   @Px private int spacing;
   @Nullable private StateListSizeChange buttonSizeChange;
 
-  private boolean isChildrenShapeInvalidated = true;
+  private boolean childShapesDirty = true;
 
   public MaterialButtonGroup(@NonNull Context context) {
     this(context, null);
@@ -209,7 +209,7 @@ public void addView(@NonNull View child, int index, @Nullable ViewGroup.LayoutPa
     // Recover the original layout params of all children before adding the new child.
     recoverAllChildrenLayoutParams();
 
-    isChildrenShapeInvalidated = true;
+    childShapesDirty = true;
     super.addView(child, index, params);
     MaterialButton buttonChild = (MaterialButton) child;
     setGeneratedIdIfNeeded(buttonChild);
@@ -237,7 +237,7 @@ public void onViewRemoved(View child) {
       originalChildStateListShapeAppearanceModels.remove(indexOfChild);
     }
 
-    isChildrenShapeInvalidated = true;
+    childShapesDirty = true;
     updateChildShapes();
 
     // Recover the original layout params of all children before updating the child layout.
@@ -274,11 +274,10 @@ protected void onLayout(boolean changed, int l, int t, int r, int b) {
   @VisibleForTesting
   void updateChildShapes() {
     // No need to update shape if no inside corners or outer corners are specified.
-    if ((innerCornerSize == null && groupStateListShapeAppearance == null)
-        || !isChildrenShapeInvalidated) {
+    if ((innerCornerSize == null && groupStateListShapeAppearance == null) || !childShapesDirty) {
       return;
     }
-    isChildrenShapeInvalidated = false;
+    childShapesDirty = false;
     int childCount = getChildCount();
     int firstVisibleChildIndex = getFirstVisibleChildIndex();
     int lastVisibleChildIndex = getLastVisibleChildIndex();
@@ -547,6 +546,14 @@ private int getButtonAllowedWidthIncrease(int index) {
 
   // ================ Getters and setters ===================
 
+  @Override
+  public void setOrientation(int orientation) {
+    if (getOrientation() != orientation) {
+      childShapesDirty = true;
+    }
+    super.setOrientation(orientation);
+  }
+
   /**
    * Returns the {@link StateListSizeChange} of child buttons on state changes.
    *
@@ -608,7 +615,7 @@ public CornerSize getInnerCornerSize() {
    */
   public void setInnerCornerSize(@NonNull CornerSize cornerSize) {
     innerCornerSize = StateListCornerSize.create(cornerSize);
-    isChildrenShapeInvalidated = true;
+    childShapesDirty = true;
     updateChildShapes();
     invalidate();
   }
@@ -637,7 +644,7 @@ public StateListCornerSize getInnerCornerSizeStateList() {
   @RestrictTo(Scope.LIBRARY_GROUP)
   public void setInnerCornerSizeStateList(@NonNull StateListCornerSize cornerSizeStateList) {
     innerCornerSize = cornerSizeStateList;
-    isChildrenShapeInvalidated = true;
+    childShapesDirty = true;
     updateChildShapes();
     invalidate();
   }
@@ -658,7 +665,7 @@ public ShapeAppearanceModel getShapeAppearance() {
   public void setShapeAppearance(@Nullable ShapeAppearanceModel shapeAppearance) {
     groupStateListShapeAppearance =
         new StateListShapeAppearanceModel.Builder(shapeAppearance).build();
-    isChildrenShapeInvalidated = true;
+    childShapesDirty = true;
     updateChildShapes();
     invalidate();
   }
@@ -684,7 +691,7 @@ public StateListShapeAppearanceModel getStateListShapeAppearance() {
   public void setStateListShapeAppearance(
       @Nullable StateListShapeAppearanceModel stateListShapeAppearance) {
     groupStateListShapeAppearance = stateListShapeAppearance;
-    isChildrenShapeInvalidated = true;
+    childShapesDirty = true;
     updateChildShapes();
     invalidate();
   }