Update the comment for setBackgroundResource that 0 removes the background.
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 829f68e..1dd0096 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -6913,7 +6913,7 @@
 
     /**
      * Set the background to a given resource. The resource should refer to
-     * a Drawable object.
+     * a Drawable object or 0 to remove the background.
      * @param resid The identifier of the resource.
      * @attr ref android.R.styleable#View_background
      */