[Android] Fix NRE on Picker (#834)

diff --git a/Xamarin.Forms.Platform.Android/AppCompat/PickerRenderer.cs b/Xamarin.Forms.Platform.Android/AppCompat/PickerRenderer.cs
index 9587d0a..0727807 100644 (file)
--- a/Xamarin.Forms.Platform.Android/AppCompat/PickerRenderer.cs
+++ b/Xamarin.Forms.Platform.Android/AppCompat/PickerRenderer.cs
@@ -111,7 +111,7 @@ namespace Xamarin.Forms.Platform.Android.AppCompat
                                _dialog.SetCanceledOnTouchOutside(true);
                                _dialog.DismissEvent += (sender, args) =>
                                {
-                                       ((IElementController)Element).SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
+                                       (Element as IElementController)?.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, false);
                                        _dialog.Dispose();
                                        _dialog = null;
                                };