Agfdhyk

I want to bind the esc key so i can switch screens on android back button press.
My understanding is that I have done screen management through the kv file and it has caused me trouble getting the online binding examples (that use management done in the py file) to work.
This is what I have:
weather.kv

ScreenManager:

    id: screen_manager



    SearchScreen:

        id: search_screen

        name: 'SearchScreen'

        manager: screen_manager

    ForecastScreen:

        id: forecast_screen

        name: 'ForecastScreen'

        manager: screen_manager

<SearchScreen>:



<ForecastScreen>:

Then in the main.py

class SearchScreen(Screen):

    location = StringProperty('No location')   

    def set_location(self, address):

        self.location = str(address)

        self.manager.current = "ForecastScreen"





class ForecastScreen(Screen):

    #code



sm=Builder.load_file('weather.kv')

class WeatherApp(App):

    def build(self):

        Window.bind(on_keyboard=self.on_key)

        return sm



    def on_key(self, window, key, *args):

        if key == 27:  # the esc key

            if self.screen_manager.current_screen.name == "SearchScreen":

                return False  # exit the app from this page

            elif self.screen_manager.current_screen.name == "ForecastScreen":

                self.screen_manager.current = "SearchScreen"

                return True



if __name__ == "__main__":

    WeatherApp().run()

Let me know if you need to see more of my code. Button based screen switching works but the self.screen_manager says that screen_manager is not part of the self object.