Skip LayoutTransition animations on objects of size (0,0)

LayoutTransition runs changing animations on all objects that change between
now and the next layout. This works in most normal situations, but when a container
is becoming visible, or being added to its container, or other first-time situations,
then some of the views and parent hierarchy may be of size (0,0). The user really
shouldn't need to see an animation up from these nonsense values, so we just
skip running the animation on these objects and simply place the objects where they
need to go.

Issue #6597648 view should not animate up from size (0,0)

Change-Id: I2c355a68bf1ce3b41fbec01ad95c78d83562ba32

1 files changed, 8 insertions, 0 deletions

diff --git a/core/java/android/animation/LayoutTransition.java b/core/java/android/animation/LayoutTransition.java
index bdcb2af..4d3a519 100644
--- a/core/java/android/animation/LayoutTransition.java
+++ b/core/java/android/animation/LayoutTransition.java
@@ -831,6 +831,14 @@ public class LayoutTransition {
             return;
         }
 
+        // Don't animate items up from size(0,0); this is likely because the objects
+        // were offscreen/invisible or otherwise measured to be infinitely small. We don't
+        // want to see them animate into their real size; just ignore animation requests
+        // on these views
+        if (child.getWidth() == 0 && child.getHeight() == 0) {
+            return;
+        }
+
         // Make a copy of the appropriate animation
         final Animator anim = baseAnimator.clone();