在kivy中单击时如何更改按钮颜色

Question

I am trying to change the button color when pressed to green. But it is somehow not working? Could anybody help?

            Button:
               pos_hint:{"top": 1,"left": 1}
               size_hint:1,1
               text: "20"
               size: 30,30
               on_release:
                  background_color:1, 0, 0, 0

Answer 1

Try this:

               on_release:
                  self.background_color = 1, 0, 0, 0