如何在没有kv语言的情况下使用KivyMD创建导航栏?

Question

我想在我的安卓应用程序中创建一个导航栏。我在谷歌上搜索了很多。我得到了解决方案，但它基于 kv 语言。我需要在不使用 kv 语言的情况下进行创建。

我不喜欢基维语言。我只喜欢蟒蛇

欢迎提出各种意见

提前非常感谢

Answer 1

带有KivyMD导航抽屉的应用程序(带有kv代码(：

from kivy.lang import Builder
from kivymd.app import MDApp
from kivymd.uix.navigationdrawer import NavigationLayout  # Do not remove
root_kv = """
<ContentNavigationDrawer@MDNavigationDrawer>:
drawer_logo: "drawer_logo.png"
NavigationDrawerSubheader:
text: "Menu:"
NavigationDrawerIconButton:
icon: "access-point"
text: "First"
NavigationDrawerIconButton:
icon: "account"
text: "Second"

NavigationLayout:
id: nav_layout
ContentNavigationDrawer:
id: nav_drawer
BoxLayout:
orientation: "vertical"
MDToolbar:
id: toolbar
title: "Toolbar title"
md_bg_color: app.theme_cls.primary_color
background_palette: "Primary"
background_hue: "500"
elevation: 10
left_action_items:
[["menu", lambda x: app.root.toggle_nav_drawer()]]
BoxLayout:
orientation: "vertical"
padding: dp(16)
MDRaisedButton:
text: "Click me!"
Widget:
"""

class MainApp(MDApp):
def build(self):
self.root = Builder.load_string(root_kv)

if __name__ == "__main__":
MainApp().run()

没有kv代码的同一应用程序(也没有绑定到应用程序主题颜色，没有id，也没有其他有用的东西(。(仅适用于主分支的KivyMD，请参阅如何安装(：

from kivy.metrics import dp
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.widget import Widget
from kivymd.app import MDApp
from kivymd.uix.navigationdrawer import (
NavigationLayout,
MDNavigationDrawer,
NavigationDrawerSubheader,
NavigationDrawerIconButton,
)
from kivymd.uix.toolbar import MDToolbar
from kivymd.uix.button import MDRaisedButton

class MainApp(MDApp):
def build(self):
nav_layout = NavigationLayout()
nav_drawer = MDNavigationDrawer(drawer_logo="drawer_logo.png")
nav_drawer.add_widget(NavigationDrawerSubheader(text="Menu:"))
nav_drawer.add_widget(
NavigationDrawerIconButton(icon="access-point", text="First")
)
nav_drawer.add_widget(NavigationDrawerIconButton(icon="account", text="Second"))
box_layout = BoxLayout(orientation="vertical")
toolbar = MDToolbar(
title="Toolbar title",
md_bg_color=self.theme_cls.primary_color,
background_palette="Primary",
background_hue="500",
elevation=10,
)
toolbar.left_action_items = [["menu", lambda x: self.root.toggle_nav_drawer()]]
box_layout.add_widget(toolbar)
box_layout_content = BoxLayout(orientation="vertical", padding=dp(16))
box_layout_content.add_widget(MDRaisedButton(text="Click me!"))
box_layout_content.add_widget(Widget())
box_layout.add_widget(box_layout_content)
nav_layout.add_widget(nav_drawer)
nav_layout.add_widget(box_layout)
self.root = nav_layout

if __name__ == "__main__":
MainApp().run()

我认为使用kv语言的应用程序代码更具可读性并且看起来不错。如果你在没有kv语言的情况下编写所有应用程序代码，它看起来会很糟糕，难以编辑，以后会有很多错误。出于这个原因，我建议你学习kv语言并用它编写程序。