commit 9e90a9953b65ae575ec8db3989857e0c145724b1
author Chet Haase <chet@google.com> Tue Jan 04 16:23:21 2011 -0800
committer Chet Haase <chet@google.com> Wed Jan 05 15:13:16 2011 -0800
tree d3ea56f2cf2bbdb0cf0ac9470829eb1c18ab77d9
parent a74c22b7ef1250922d88aafc82bd7458db3f9cf5

Reuse display lists at the java level.

Objects are invalidated and reset instead of being nulled out
and recreated. This avoids creating small amounts of garbage for
the display list and canvas objects.

Change-Id: I464fac7ea8944c19ad6d03f13a95d9017e3f4262

core/java/android/view/View.java

diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 48f9e81..3cacbe3 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -7783,9 +7783,12 @@
         }
 
         if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED &&
-                ((mPrivateFlags & DRAWING_CACHE_VALID) == 0 || mDisplayList == null)) {
+                ((mPrivateFlags & DRAWING_CACHE_VALID) == 0 ||
+                        mDisplayList == null || !mDisplayList.isValid())) {
 
-            mDisplayList = mAttachInfo.mHardwareRenderer.createDisplayList();
+            if (mDisplayList == null) {
+                mDisplayList = mAttachInfo.mHardwareRenderer.createDisplayList();
+            }
 
             final HardwareCanvas canvas = mDisplayList.start();
             try {
@@ -7886,7 +7889,7 @@
             mUnscaledDrawingCache = null;
         }
         if (mDisplayList != null) {
-            mDisplayList = null;
+            mDisplayList.invalidate();
         }
     }