[ExposedDropdownMenu] Fix MaterialAutoCompleteTextView.setDropDownBackgroundDrawable(Drawable).

Material Design Team · paulfthomas · commit db115f0a1f04 · 2022-10-21T16:23:52.000Z
[TextField] MaterialAutoCompleteTextView uses a ListPopupWindow to show a modal dropdown menu when in "Accessibility Touch Exploration" mode. This popup also should respond to setDropDownBackgroundDrawable(Drawable).

PiperOrigin-RevId: 482233381
diff --git a/lib/java/com/google/android/material/textfield/MaterialAutoCompleteTextView.java b/lib/java/com/google/android/material/textfield/MaterialAutoCompleteTextView.java
@@ -281,6 +281,14 @@ public ColorStateList getSimpleItemSelectedRippleColor() {
     return simpleItemSelectedRippleColor;
   }
 
+  @Override
+  public void setDropDownBackgroundDrawable(Drawable d) {
+    super.setDropDownBackgroundDrawable(d);
+    if (modalListPopup != null) {
+      modalListPopup.setBackgroundDrawable(d);
+    }
+  }
+
   /**
    * Returns the elevation of the dropdown popup.
    *

Original file line number	Diff line number	Diff line change
`@@ -281,6 +281,14 @@ public ColorStateList getSimpleItemSelectedRippleColor() {`
`281`	`281`	`return simpleItemSelectedRippleColor;`
`282`	`282`	`}`
`283`	`283`
	`284`	`+ @Override`
	`285`	`+ public void setDropDownBackgroundDrawable(Drawable d) {`
	`286`	`+ super.setDropDownBackgroundDrawable(d);`
	`287`	`+ if (modalListPopup != null) {`
	`288`	`+ modalListPopup.setBackgroundDrawable(d);`
	`289`	`+ }`
	`290`	`+ }`
	`291`	`+`
`284`	`292`	`/**`
`285`	`293`	`* Returns the elevation of the dropdown popup.`
`286`	`294`	`*`