void Grid_Focused(object sender, Xamarin.Forms.FocusEventArgs e)
{
Debug.WriteLine("ListView_Focused");
MessageEntry.Unfocus();
}
void Handle_Clicked(object sender, System.EventArgs e)
{
MessageEntry.Unfocus();
}
void ListView_ItemTapped(object sender, Xamarin.Forms.ItemTappedEventArgs e)
{
MessageEntry.Unfocus();
listView.SelectedItem = null;
}