在Kivy Launcher上运行Kivy代码时崩溃

Question

以下代码在Windows上可以正常运行，但是当我尝试在kivy启动器上运行它时，它立即崩溃。 有一个kv文件以及脚本。 不幸的是，我一直在试图解决这个问题，但没有成功。 感谢任何帮助。

python脚本

# -*- coding: utf-8 -*-
import kivy
kivy.require('1.1.3')
from kivy.app import App
#kivy.require("1.8.0")
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen, FadeTransition
from kivy.uix.widget import Widget


class Painter(Widget):
    pass


class MainScreen(Screen):
    pass


class AnotherScreen(Screen):

    pass


class AnotherScreen2(Screen):
    pass


class AnotherScreen3(Screen):
    pass


class ScreenManagement(ScreenManager):
    pass


presentation = Builder.load_file("showcase.kv")


class MainApp(App):

    def build(self):
            return presentation

if __name__ in ('__main__', '__android__'):
    MainApp().run()

kv文件

哪个python脚本加载 名称：show.kv

#: import FadeTransition kivy.uix.screenmanager.FadeTransition

ScreenManagement:
    transition: FadeTransition()
    MainScreen:
    AnotherScreen:
    AnotherScreen2:
    AnotherScreen3:

<MainScreen>:
    name: "main"

    FloatLayout:
        Painter
        Button:
            text: "1"
            on_release: app.root.current = "other"
            color: 0,1,0,1
            font_size: 40
            size_hint: 0.3,0.2
            pos_hint: {"right":1, "top":1}

        Button:
            text: "2"
            on_release: app.root.current = "power"
            color: 0,1,0,1
            font_size: 40
            size_hint: 0.3,0.2
            pos_hint: {"x": 0, "top": 1}

        Button:
            text: "3"
            on_release: app.root.current = "tube"
            color: 0,1,0,1
            font_size: 40
            size_hint: 0.3,0.2
            pos_hint: {"x": .5, "top": 1}

<AnotherScreen>:
    name: "other"

    FloatLayout:

        Painter
        Button:
            color: 0,1,0,1
            font_size: 40
            size_hint: 0.3,0.2
            text: "Back Home"
            on_release: app.root.current = "main"
            pos_hint: {"right":0.5, "top":1}

<AnotherScreen2>:
    name: "power"

    FloatLayout:
        Painter
        Button:
            color: 0,1,0,1
            font_size: 40
            size_hint: 0.3,0.2
            text: "Back Home"
            on_release: app.root.current = "main"
            pos_hint: {"right":0.5, "top":1}


<AnotherScreen3>:
    name: "tube"

    FloatLayout:
        Painter
        Button:
            color: 0,1,0,1
            font_size: 40
            size_hint: 0.3,0.2
            text: "Back Home"
            on_release: app.root.current = "main"
            pos_hint: {"right":0.5, "top":1}