如何使用 Flutter 和地理位置 API 构建基于位置的移动应用程序？

import 'package:flutter/material.dart';
import 'package:location/location.dart';
 
void main() => runApp(MyApp());
 
class MyApp extends StatelessWidget {
  // 此处可以添加必要的初始化代码
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomePage(),
    );
  }
}
 
class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}
 
class _HomePageState extends State<HomePage> {
  Location location = Location();
  String _currentLocation = 'Unknown';
 
  void getLocation() async {
    try {
      LocationData locationData = await location.getLocation();
      setState(() {
        _currentLocation = 
          'Latitude: ${locationData.latitude}, Longitude: ${locationData.longitude}';
      });
    } catch (e) {
      print('Error: $e');
      setState(() {
        _currentLocation = 'Failed to get location';
      });
    }
  }
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Location App'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('Current Location:'),
            Text(_currentLocation),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: getLocation,
        tooltip: 'Get Location',
        child: Icon(Icons.location_searching),
      ),
    );
  }
}

这段代码使用了Flutter的location插件来获取设备的当前位置，并在界面上显示。用户可以点击浮动按钮来触发位置获取功能。这个例子展示了如何在Flutter应用中集成地理位置服务，并简单地处理位置数据。