1 files changed, 17 insertions, 5 deletions
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 8efaeab..ed0ceb2 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -14711,11 +14711,11 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null);
     }
 
-    RenderNode updateDisplayListIfDirty() {
+    private void updateDisplayListIfDirty() {
         final RenderNode renderNode = mRenderNode;
         if (!canHaveDisplayList()) {
             // can't populate RenderNode, don't try
-            return renderNode;
+            return;
         }
 
         if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0
@@ -14729,7 +14729,7 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
                 mPrivateFlags &= ~PFLAG_DIRTY_MASK;
                 dispatchGetDisplayList();
 
-                return renderNode; // no work needed
+                return; // no work needed
             }
 
             // If we got here, we're recreating it. Mark it as such to ensure that
@@ -14778,7 +14778,19 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
             mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID;
             mPrivateFlags &= ~PFLAG_DIRTY_MASK;
         }
-        return renderNode;
+    }
+
+    /**
+     * Returns a RenderNode with View draw content recorded, which can be
+     * used to draw this view again without executing its draw method.
+     *
+     * @return A RenderNode ready to replay, or null if caching is not enabled.
+     *
+     * @hide
+     */
+    public RenderNode getDisplayList() {
+        updateDisplayListIfDirty();
+        return mRenderNode;
     }
 
     private void resetDisplayList() {
@@ -15540,7 +15552,7 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         if (drawingWithRenderNode) {
             // Delay getting the display list until animation-driven alpha values are
             // set up and possibly passed on to the view
-            renderNode = updateDisplayListIfDirty();
+            renderNode = getDisplayList();
             if (!renderNode.isValid()) {
                 // Uncommon, but possible. If a view is removed from the hierarchy during the call
                 // to getDisplayList(), the display list will be marked invalid and we should not