diff --git a/android-pickerdialog/src/main/java/com/sunjian/android_pickview_lib/view/WheelView.java b/android-pickerdialog/src/main/java/com/sunjian/android_pickview_lib/view/WheelView.java
index 9def807..2c1c5a5 100755
--- a/android-pickerdialog/src/main/java/com/sunjian/android_pickview_lib/view/WheelView.java
+++ b/android-pickerdialog/src/main/java/com/sunjian/android_pickview_lib/view/WheelView.java
@@ -644,6 +644,10 @@ public boolean onKeyDown(int keyCode, KeyEvent event) {
             if (!(count == 0 || nextItem >= count)) {
                 setCurrentItem(nextItem);
                 handler.sendEmptyMessage(MessageHandler.WHAT_ITEM_SELECTED);
+            } else if (isLoop) {
+                nextItem = getLoopMappingIndex(getCurrentItem() + 1);
+                setCurrentItem(nextItem);
+                handler.sendEmptyMessage(MessageHandler.WHAT_ITEM_SELECTED);
             }
             return true;
         } else if (keyCode == KeyEvent.KEYCODE_DPAD_UP) {
@@ -653,6 +657,10 @@ public boolean onKeyDown(int keyCode, KeyEvent event) {
             if (!(count == 0 || preItem < 0)) {
                 setCurrentItem(preItem);
                 handler.sendEmptyMessage(MessageHandler.WHAT_ITEM_SELECTED);
+            } else if (isLoop) {
+                preItem = getLoopMappingIndex(getCurrentItem() - 1);
+                setCurrentItem(preItem);
+                handler.sendEmptyMessage(MessageHandler.WHAT_ITEM_SELECTED);
             }
             return true;
         }
@@ -663,4 +671,4 @@ private float dp2px(Context context, float dipValue) {
         final float scale = context.getResources().getDisplayMetrics().density;
         return dipValue * scale + 0.5f;
     }
-}
\ No newline at end of file
+}