Example of asynchronous image loading and stopping

gistfile1.py

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.image import AsyncImage, Image
from kivy.loader import Loader
from kivy.clock import Clock


class TestApp(App):
    '''Demonstrate the mechanics of managing asynchronous image loading'''

    def _image_loaded(self, proxyImage):
        '''Fired once the image is loaded and ready to use'''
        if proxyImage.image.texture:
            self.image.texture = proxyImage.image.texture

    def _cancel_loading(self, dt):
        '''Stop the image from loading'''
        Loader.stop()  # It looks like this would stop all other
                       # ProxyImages loading too.

    def build(self):
        '''Build and return the main Image widget'''
        proxyImage = Loader.image("e:/Zen/My Pictures/Computer/Aqua Blue.jpg")
        proxyImage.bind(on_load=self._image_loaded)
        self.image = Image()

        # Uncomment the line below to close the background loading threads
        # Clock.schedule_once(self._cancel_loading, 0.1)
        return self.image

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