Программа для прослушивания mp3 на основе местоположения

так, добавив його там, де сказав чат GPT, але далі маю помилку

Доброго вечора, дякую за підказку! Якщо мені не вдасться чи я можу Вас допомогти мені (за грогі)? Бо я тільки почав працювати з Android Studio і не знаю чи я на вірному шляху.

Привіт

import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  Position? _currentPosition;  // Declare a Position variable to store the location

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  // Asynchronous method to get the current location
  _getCurrentLocation() async {
    Position position = await Geolocator.getCurrentPosition(
        desiredAccuracy: LocationAccuracy.high);
    setState(() {
      _currentPosition = position;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text('You have pushed the button this many times:'),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
            // Display the current location if available
            if (_currentPosition != null)
              Text(
                  "LAT: ${_currentPosition!.latitude}, LNG: ${_currentPosition!.longitude}"),
            ElevatedButton(
              onPressed: () {
                _getCurrentLocation();  // Call this method when the button is pressed
              },
              child: const Text("Get location"),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ),
    );
  }
}