commit 362adb84d95fb069c3890274f3ae95d4539b00e5
author Chris Craik <ccraik@google.com> Tue Nov 05 17:41:21 2013 -0800
committer Chris Craik <ccraik@google.com> Tue Nov 05 17:41:21 2013 -0800
tree 5cb8c671c81ebecbec84ef95f5994e5b8ad1b3f8
parent 194271565399a9216b8e0dece118874fc5f7e474

Work around nested SaveLayerAlpha bug

bug:11481077

Because TextView marquee and KeyguardSecurityViewFlipper use SaveLayer
(for the marquee fading effect and view alpha, respectively), both can
be nested, which hits a bug in the renderer resulting in artifacts.

Workaround this by setting a hardware layer on the marquee, so that
those marquee effects are drawn outside of the ViewFlipper.

Change-Id: If8b7ebb20d3959cb930a8bea2146ba3f8e659612

packages/Keyguard/src/com/android/keyguard/KeyguardMessageArea.java

diff --git a/packages/Keyguard/src/com/android/keyguard/KeyguardMessageArea.java b/packages/Keyguard/src/com/android/keyguard/KeyguardMessageArea.java
index 69075ec..751572c 100644
--- a/packages/Keyguard/src/com/android/keyguard/KeyguardMessageArea.java
+++ b/packages/Keyguard/src/com/android/keyguard/KeyguardMessageArea.java
@@ -177,6 +177,7 @@
 
     public KeyguardMessageArea(Context context, AttributeSet attrs) {
         super(context, attrs);
+        setLayerType(LAYER_TYPE_HARDWARE, null); // work around nested unclipped SaveLayer bug
 
         mLockPatternUtils = new LockPatternUtils(context);