How to make a GPS Tracking App with Kivy and using it on android

[Marco Lange]

I'm not sure what the issue is, but the app is active on my phone, however it won't display my location. Any ideas?

Source Code, only one class:
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.utils import platform
from jnius import autoclass, PythonJavaClass, java_method
import traceback

# Prüfe, ob die App auf Android läuft
if platform == 'android':
    # Importiere benötigte Klassen aus der Android-API
    PythonActivity = autoclass('org.kivy.android.PythonActivity')
    LocationManager = autoclass('android.location.LocationManager')
    Criteria = autoclass('android.location.Criteria')

class LocationApp(App):
    def build(self):
        layout = BoxLayout(orientation='vertical')

        self.label = Label(text="Standort wird ermittelt...")
        layout.add_widget(self.label)

        # Füge einen Button hinzu, um den Standort manuell abzurufen
        self.button = Button(text="Standort abrufen", on_press=self.get_location)
        layout.add_widget(self.button)

        return layout

    def get_location(self, instance):
        try:
            # Erstelle einen LocationManager
            self.location_manager = PythonActivity.mActivity.getSystemService(PythonActivity.LOCATION_SERVICE)

            # Erstelle ein Criteria-Objekt, um den besten Anbieter zu wählen
            criteria = Criteria()
            best_provider = self.location_manager.getBestProvider(criteria, True)

            # Fordere die Standortaktualisierungen an
            self.location_listener = MyLocationListener(self.label)
            self.location_manager.requestLocationUpdates(best_provider, 0, 0, self.location_listener)
        except Exception as e:
            traceback.print_exc()

class MyLocationListener(PythonJavaClass):
    __javainterfaces__ = ['android/location/LocationListener']

    def __init__(self, label):
        super().__init__()
        self.label = label

    # Implementiere die Methode onLocationChanged
    @java_method(' (Landroid/location/Location;)V')
    def onLocationChanged(self, location):
        try:
            # Aktualisiere die Label-Anzeige mit den aktuellen Koordinaten
            self.label.text = f"Breitengrad: {location.getLatitude()}\nLängengrad: {location.getLongitude()}"
        except Exception as e:
            traceback.print_exc()

    # Weitere Methoden wie onStatusChanged, onProviderEnabled, onProviderDisabled können ebenfalls implementiert werden, je nach Bedarf

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

[Tomek CEDRO]

Can you make sure that application has been granted location
permission (Settings / Applications)?

--
CeDeROM, SQ7MHZ, http://www.tomek.cedro.info

[Marco Lange]

Yes, when i start the app for the first time i will asked to give permission for location.

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