Fix something wrong while inputting.

AwesomeUIWidgets/Assets/Scripts/DateAndTimePicker.cs

 {
     
     
-    public class DatePickerDemo : UIWidgetsPanel
+    public class DateAndTimePicker : UIWidgetsPanel
     {
         protected void OnEnable()
         {

AwesomeUIWidgets/Assets/Scripts/Widgets/chat_list.cs

             _oldData = new List<object>();
             _oldData.AddRange(widget.items);
             _oldIndex = new List<string>();
-            foreach (var item in widget.items)
-            {
-                if (item is Dictionary<string, object>)
-                {
-                    var message1 = ((Dictionary<string, object>) item)["message"] as ChatComponents.Message;
-                    _oldIndex.Add(message1.id);
-                }
-            }
+           
         }
 
         public override void didUpdateWidget(StatefulWidget oldWidget)
                    int test = widget.items.IndexOf(item);
                    if (message1 != null)
                    {
-                       _listKey.currentState?.insertItem(0);
+                       if (_oldIndex != null && !_oldIndex.Contains(message1.id))
+                       {
+                           _listKey.currentState?.insertItem(0);
+                       }
+
+                       
                    }
                 }
             }
+            List<string> _newIndex = new List<string>();
+            foreach (var item in widget.items)
+            {
+                if (item is Dictionary<string, object> ) 
+                {
+                    var message1 = ((Dictionary<string, object>)item)["message"] as ChatComponents.Message;
+                    if (message1 != null)
+                        _newIndex.Add(message1.id);
+                }
+            }
-           
+            _oldIndex = _newIndex;
+
         }