从回收视图-kivy 将回收视图项目添加到另一个屏幕

Question

我有两个屏幕。 MainScreen 和 Playlist。 MainScreen 添加了 RecycleView 方法来显示项目列表。这些项目是从 文件夹名称 （目录）创建的。我希望每个文件夹（目录）中的文件根据单击的目录名称在 Playlist 屏幕上打开。

我打算在用户离开屏幕后立即清屏。

from kivymd.app import MDApp
from kivymd.uix.button import MDFlatButton, MDRectangleFlatButton
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.recycleview import RecycleView
from kivy.uix.screenmanager import ScreenManager, Screen
from kivymd.uix.screen import MDScreen

from pathlib import Path, PurePath

# Music Path
storageLocation = Path.cwd()
if Path('Books').is_dir():
    storageLocation = Path.cwd() / 'Books'

class RecycleViewRow(BoxLayout):
    text = StringProperty()


class MainScreen(MDScreen):
    def __init__(self, **kwargs):
        super(MainScreen, self).__init__(**kwargs)

        booksdir = [f for f in storageLocation.iterdir() if f.is_dir()]
        self.children[0].data = [{'text': str(x), 'id': str(x)} for x in booksdir]
       # print(self.children[0].data)

class Playlist(MDScreen):
    def on_pre_enter(self, *args):
        self.ids.Box.clear_widgets()
        #self.ids.Box.add_widget(MDRectangleFlatButton(text="done", ))
        print(self.manager.ids)
        return


class Main(MDApp):
    def build(self):
        sm = ScreenManager()
        sm.add_widget(MainScreen(name='MainScreen'))
        sm.add_widget(Playlist(name='Playlist'))
        sm.add_widget(Test(name="Test"))
        return sm  
Main().run()

.kv

<RecycleViewRow>:
    orientation: 'vertical'

    Button:
        text: root.text
        #on_press: app.root.message_box(root.text)
        on_release:app.root.current = 'Playlist'

<MainScreen>:


    RecycleView:
        id: rv
        viewclass: 'RecycleViewRow'
        RecycleBoxLayout:
            default_size: None, dp(56)
            default_size_hint: 1, None
            size_hint_y: None
            height: self.minimum_height
            orientation: 'vertical'


<Playlist>
    BoxLayout:
        orientation: 'vertical'
        id:Box

Answer 1

您可以从您的 RecycleViewRow 触发方法，如下所示：

<RecycleViewRow>:
    orientation: 'vertical'

    Button:
        text: root.text
        on_release: app.fill_playlist(root.text)

然后，fill_playlist()方法。你可以填写 PlayList:

def fill_playlist(self, dir):
    self.root.current = 'Playlist'  # this also clears the play list
    playlist = self.root.get_screen('Playlist')
    for sub in os.listdir(dir):
        playlist.ids.Box.add_widget(MDRectangleFlatButton(text=sub))

从回收视图-kivy 将回收视图项目添加到另一个屏幕

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