commit d0d495f5083b5acf93a3de9b28e87d7dcad8f6f4
author Sunny Goyal <sunnygoyal@google.com> Wed Sep 07 14:39:41 2016 -0700
committer Sunny Goyal <sunnygoyal@google.com> Wed Sep 07 14:40:46 2016 -0700
tree 4b48fd874642c5b4a2b693ede9e8ca3eb1dcc927
parent 9b7149db401959f0c3fc5f6bcb46c5d424858955

Preventing concurrentmodification exception when dragging a icon
with shortcuts from inside a folder

When dragging the icon, DeepShortcutContainer removes itself as a
dragListener causing the exception

Change-Id: Ifb2b4a3045caa54aa0b6a9b525055ffdcfaa04a6

src/com/android/launcher3/dragndrop/DragController.java

diff --git a/src/com/android/launcher3/dragndrop/DragController.java b/src/com/android/launcher3/dragndrop/DragController.java
index b67d3b8..29e33e9 100644
--- a/src/com/android/launcher3/dragndrop/DragController.java
+++ b/src/com/android/launcher3/dragndrop/DragController.java
@@ -260,7 +260,7 @@
         dragView.show(mMotionDownX, mMotionDownY);
         mDistanceSinceScroll = 0;
 
-        for (DragListener listener : mListeners) {
+        for (DragListener listener : new ArrayList<>(mListeners)) {
             listener.onDragStart(mDragObject, mOptions);
         }