[Search] sync SearchBar text and placeholder for contained animations

Previously, the SearchBar placeholder text could be updated independently of the main TextView to handle transitions where SearchView.EditText differed from SearchBar.TextView.

However, for contained animations, having these texts out of sync complicates the translation logic and causes incorrect offset calculations. Since the contained style uses cross-fading, keeping the TextView and placeholder in sync provides a smoother transition without the positioning bugs.

PiperOrigin-RevId: 881635003

Author: Material Design Team

lib/java/com/google/android/material/search/SearchView.java

@@ -174,6 +174,7 @@ public class SearchView extends FrameLayout
   private boolean useWindowInsetsController;
   private boolean statusBarSpacerEnabledOverride;
   private final boolean dividerVisible;
+  private final boolean containedAnimationEnabled;
   @NonNull private TransitionState currentTransitionState = TransitionState.HIDDEN;
   private Map<View, Integer> childImportantForAccessibilityMap;
   private final OnTouchModeChangeListener touchModeChangeListener =
@@ -224,7 +225,7 @@ public SearchView(@NonNull Context context, @Nullable AttributeSet attrs, int de
     autoShowKeyboard = a.getBoolean(R.styleable.SearchView_autoShowKeyboard, true);
     backHandlingEnabled = a.getBoolean(R.styleable.SearchView_backHandlingEnabled, true);
     dividerVisible = a.getBoolean(R.styleable.SearchView_dividerVisible, true);
-    boolean containedAnimationEnabled =
+    containedAnimationEnabled =
         a.getBoolean(R.styleable.SearchView_containedAnimationEnabled, false);
 
     a.recycle();
@@ -326,7 +327,7 @@ public void startBackProgress(@NonNull BackEventCompat backEvent) {
     if (isHiddenOrHiding() || searchBar == null) {
       return;
     }
-    if (searchBar != null) {
+    if (!containedAnimationEnabled) {
       searchBar.setPlaceholderText(editText.getText().toString());
     }
     searchViewAnimationHelper.startBackProgress(backEvent);
@@ -964,7 +965,9 @@ public void hide() {
       return;
     }
     if (searchBar != null && searchBar.isAttachedToWindow()) {
-      searchBar.setPlaceholderText(editText.getText().toString());
+      if (!containedAnimationEnabled) {
+        searchBar.setPlaceholderText(editText.getText().toString());
+      }
       searchBar.post(searchViewAnimationHelper::hide);
     } else {
       searchViewAnimationHelper.hide();