Merge pull request yuyakaido#33 from yuyakaido/visible-count

yuyakaido · web-flow · commit 42462bef3ca1 · 2017-10-18T12:36:49.000+09:00
Fixed yuyakaido#32
diff --git a/README.md b/README.md
@@ -82,6 +82,8 @@ CardStackView#setStackFrom(StackFrom.Bottom);
 
 ## VisibleCount
 
+This value must be greater than 0.
+
 | Default | Value | Sample |
 | :----: | :----: | :----: |
 | ✅ | 3 | ![VisibleCount-3](https://github.com/yuyakaido/CardStackView/blob/master/images/visible-count-3.png) |
diff --git a/cardstackview/src/main/java/com/yuyakaido/android/cardstackview/CardStackView.java b/cardstackview/src/main/java/com/yuyakaido/android/cardstackview/CardStackView.java
@@ -321,8 +321,10 @@ private void reorderForReverse(View prevView) {
     private void executePreSwipeTask() {
         containers.getFirst().setContainerEventListener(null);
         containers.getFirst().setDraggable(false);
-        containers.get(1).setContainerEventListener(containerEventListener);
-        containers.get(1).setDraggable(true);
+        if (containers.size() > 1) {
+            containers.get(1).setContainerEventListener(containerEventListener);
+            containers.get(1).setDraggable(true);
+        }
     }
 
     private void executePostSwipeTask(Point point, SwipeDirection direction) {
