如何在android python kivy上全屏显示图片？

from kivy.app import App
from kivy.uix.image import Image
from kivy.core.window import Window


class MyApp(App):
    def build(self):
        # 设置窗口全屏显示
        Window.fullscreen = True
        # 加载并显示图片
        image = Image(source='path_to_image', allow_stretch=True)
        return image


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