Invalidate when Drawable.setState() returns true

Ensures views that manage drawables follow the contract set forth in
the Drawable.setState() documentation.

Bug: 23792020
Change-Id: I4e5a449cd6535487873fd8443da50555c38e8ed9

1 files changed, 4 insertions, 4 deletions

diff --git a/core/java/android/widget/NumberPicker.java b/core/java/android/widget/NumberPicker.java
index b5fae4ed17a9..c3ddec787bfa 100644
--- a/core/java/android/widget/NumberPicker.java
+++ b/core/java/android/widget/NumberPicker.java
@@ -1528,10 +1528,10 @@ public class NumberPicker extends LinearLayout {
     protected void drawableStateChanged() {
         super.drawableStateChanged();
 
-        final int[] state = getDrawableState();
-
-        if (mSelectionDivider != null && mSelectionDivider.isStateful()) {
-            mSelectionDivider.setState(state);
+        final Drawable selectionDivider = mSelectionDivider;
+        if (selectionDivider != null && selectionDivider.isStateful()
+                && selectionDivider.setState(getDrawableState())) {
+            invalidateDrawable(selectionDivider);
         }
     }