按钮宽度在 pc 上是对称的，但在 android python/kivy 上不是对称的

Question

I created a custom Toggle Button, setting size_hint_x to None to put width . The button is perfect on pc but on android it is as if the width of the button had been reset.

MyWidget.kv:

#:import Window kivy.core.window.Window

<MyButton>:
    size_hint_x: None
    width: Window.width/3
    font_name: "path/to/font.ttf"
    md_bg_color: app.theme_cls.bg_dark
    background_down: get_color_from_hex("#2e5871")
    font_color_normal: app.theme_cls.primary_color
    font_color_down: app.theme_cls.primary_light
    allow_no_selection: False

MyWidget.py

from kivymd.uix.behaviors.toggle_behavior import MDToggleButton
from kivymd.uix.button import MDRectangleFlatButton

class MyButton(MDRectangleFlatButton, MDToggleButton):
    def __init__(self, **kwargs):
        self.background_normal = 1, 1, 1, 1
        super().__init__(**kwargs)

Location I'm using the button:

MDRelativeLayout:
    size_hint: 1, None
    height: dp(45)

    MyButton:
        text: "List 1"
        group: "list"
        pos_hint: {"top":1, "left":1}

    MyButton:
        text: "List 2"
        group: "list"
        pos_hint: {"top":1, "center_x":.5}

    MyButton:
        text: "List 3"
        group: "list"
        pos_hint: {"top":1, "right":1}

Here is the app images

Application on PC

Application on Android

Answer 1

The issue was resolved by changing the size_hint_x instead of the width .

Obrigado @ApuCoder