PolarClock: Don't draw on invisible surfacesstable/cm-11.0-XNG3Cstable/cm-11.0-XNG2Scm-11.0

This sometimes crashes the device when the activity is recreated
due to rotation or other reconfigurations.

In some events, namely when the surface visibility changes we
were drawing a frame which, depending on timing, might end up
locking/drawing/unlocking a surface that was previously destroyed
which would crash the app.

Change-Id: I6c4381ce03882658307386a351336894845966e3

1 files changed, 4 insertions, 0 deletions

diff --git a/src/com/android/wallpaper/polarclock/PolarClockWallpaper.java b/src/com/android/wallpaper/polarclock/PolarClockWallpaper.java
index cba7b11..2ea62de 100644
--- a/src/com/android/wallpaper/polarclock/PolarClockWallpaper.java
+++ b/src/com/android/wallpaper/polarclock/PolarClockWallpaper.java
@@ -462,6 +462,10 @@ public class PolarClockWallpaper extends WallpaperService {
                 return;
             }
 
+            if (!mVisible) {
+                return;
+            }
+
             final SurfaceHolder holder = getSurfaceHolder();
             final Rect frame = holder.getSurfaceFrame();
             final int width = frame.width();