commit 7e2a3608b6fa51c884e051625e10d13597cb8796
author Sunny Goyal <sunnygoyal@google.com> Mon Apr 20 18:19:25 2015 -0700
committer Sunny Goyal <sunnygoyal@google.com> Mon Apr 20 18:19:25 2015 -0700
tree 590f8fabf034acd97e79ac02fa1122e4cd6289d0
parent d5a03eb0b3015e8d307299ea2c8771b3b204a6ea

Preventing concurrent modification exception during widget restore

Change-Id: If896c5ea7136d132f30be8127b651449bde17447

src/com/android/launcher3/LauncherAppWidgetHost.java

diff --git a/src/com/android/launcher3/LauncherAppWidgetHost.java b/src/com/android/launcher3/LauncherAppWidgetHost.java
index a28fd25..583f85a 100644
--- a/src/com/android/launcher3/LauncherAppWidgetHost.java
+++ b/src/com/android/launcher3/LauncherAppWidgetHost.java
@@ -84,8 +84,10 @@
         mLauncher.bindPackagesUpdated(LauncherModel.getSortedWidgetsAndShortcuts(mLauncher,
                 true /* refresh */));
 
-        for (Runnable callback : mProviderChangeListeners) {
-            callback.run();
+        if (!mProviderChangeListeners.isEmpty()) {
+            for (Runnable callback : new ArrayList<>(mProviderChangeListeners)) {
+                callback.run();
+            }
         }
     }