python-3.x - kivymdのテキスト入力からデータを取得する方法

Question

私はkivyに不慣れで、kivymd.iはテキスト入力からテキストを取得したいのですが、ボタンからpythonファイルのsubmit関数を呼び出す問題に直面しています.iはナビゲーションドロワーコードを使用しました。クラス ContentNavigationDrawerまたは クラス TestNavigationDrawerで送信関数を定義する必要がありますか? 以下はコードです

.py

from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivy.properties import StringProperty, ListProperty
from kivymd.uix.list import OneLineIconListItem, MDList

from kivymd.app import MDApp




class ItemDrawer(OneLineIconListItem):
    icon = StringProperty()
    text_color = ListProperty((0, 0, 0, 1))


class ContentNavigationDrawer(BoxLayout):
    screen_manager = ObjectProperty()
    nav_drawer = ObjectProperty()



class TestNavigationDrawer(MDApp):
    namee = ObjectProperty()


    def build(self):
        kv= Builder.load_file("screenmd.kv")
        self.theme_cls.primary_palette = "Red"
        return kv

    def submit(self):
        print(self.namee.text)




TestNavigationDrawer().run()

.kv

<ContentNavigationDrawer>:
    orientation: "vertical"
    padding: "8dp"
    spacing: "8dp"

    AnchorLayout:
        anchor_x: "left"
        size_hint_y: None
        height: avatar.height

        Image:
            id: avatar
            size_hint: None, None
            size: "56dp", "56dp"
            source: "data/logo/kivy-icon-256.png"

    MDLabel:
        text: "KivyMD library"
        font_style: "Button"
        size_hint_y: None
        height: self.texture_size[1]

    MDLabel:
        text: "kivydevelopment@gmail.com"
        font_style: "Caption"
        size_hint_y: None
        height: self.texture_size[1]

    ScrollView:

        MDList:

            OneLineListItem:
                text: "Screen 1"
                on_press:
                    root.nav_drawer.set_state("close")
                    root.screen_manager.current = "scr 1"

            OneLineListItem:
                text: "Screen 2"
                on_press:
                    root.nav_drawer.set_state("close")
                    root.screen_manager.current = "scr 2"


Screen:

    MDToolbar:
        id: toolbar
        background_color: app.theme_cls.primary_dark
        pos_hint: {"top": 1}
        elevation: 10
        title: "Iota World"
        left_action_items: [["menu", lambda x: nav_drawer.set_state("open")]]

    NavigationLayout:
        x: toolbar.height

        ScreenManager:
            id: screen_manager

            Screen:
                name: "scr 1"

                namee:namee


                MDTextField:
                    id:namee
                    hint_text: "Name"
                    helper_text:"forget"
                    pos_hint : {'center_x':0.5 ,'center_y':0.5}
                    size_hint_x : None
                    width: 300
                MDRectangleFlatButton:
                    text: "Submit"
                    pos_hint : {'center_x':0.5 ,'center_y':0.4}
                    text_color: 0, 0, 1, 1
                    md_bg_color: 1, 1, 0, 1
                    on_release:
                        print("success")
                        app.submit()


            Screen:
                name: "scr 2"

                MDLabel:
                    text: "Screen 2"
                    halign: "center"

        MDNavigationDrawer:
            id: nav_drawer

            ContentNavigationDrawer:
                screen_manager: screen_manager
                nav_drawer: nav_drawer
                id: content_drawer

エラー

print(self.namee.text)
 AttributeError: 'NoneType' object has no attribute 'text'