如何在KivyMD中创建选择列表

from kivymd.app import MDApp
from kivymd.uix.list import MDList, OneLineListItem

class MyApp(MDApp):
    def build(self):
        pass

class MyApp(MDApp):
    def build(self):
        list_view = MDList()
        self.root.add_widget(list_view)

class MyApp(MDApp):
    def build(self):
        list_view = MDList()
        list_item1 = OneLineListItem(text="Item 1")
        list_item2 = OneLineListItem(text="Item 2")
        list_view.add_widget(list_item1)
        list_view.add_widget(list_item2)
        self.root.add_widget(list_view)

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