vk_location_sharing 0.0.1

A Flutter package for implementing location sharing with foreground streams and periodic background updates.

example/lib/main.dart

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

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Location Sharing Example',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const LocationHome(),
    );
  }
}

class LocationHome extends StatefulWidget {
  const LocationHome({super.key});

  @override
  State<LocationHome> createState() => _LocationHomeState();
}

class _LocationHomeState extends State<LocationHome> {
  final _vkLocation = VkLocationSharing();
  Position? _currentPosition;
  bool _isForegroundRunning = false;
  bool _isBackgroundRunning = false;

  @override
  void initState() {
    super.initState();
    _initBackground();
  }

  Future<void> _initBackground() async {
    await _vkLocation.initializeBackground();
  }

  void _startForeground() async {
    final stream = await _vkLocation.startForegroundSharing(
      accuracy: LocationAccuracy.best,
      distanceFilter: 5,
      onLocationUpdate: (position) {
        setState(() {
          _currentPosition = position;
        });
      },
    );

    if (stream != null) {
      setState(() {
        _isForegroundRunning = true;
      });
    }
  }

  void _stopForeground() async {
    await _vkLocation.stopForegroundSharing();
    setState(() {
      _isForegroundRunning = false;
    });
  }

  void _startBackground() async {
    try {
      await _vkLocation.startBackgroundSharing();
      setState(() {
        _isBackgroundRunning = true;
      });
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Background Sharing Started')),
        );
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Error: $e')),
        );
      }
    }
  }

  void _stopBackground() async {
    await _vkLocation.stopBackgroundSharing();
    setState(() {
      _isBackgroundRunning = false;
    });
    if (mounted) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Background Sharing Stopped')),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Location Sharing'),
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
      ),
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(20.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              if (_currentPosition != null)
                Card(
                  child: Padding(
                    padding: const EdgeInsets.all(16.0),
                    child: Column(
                      children: [
                        Text('Lat: ${_currentPosition!.latitude}'),
                        Text('Lng: ${_currentPosition!.longitude}'),
                        Text('Time: ${_currentPosition!.timestamp}'),
                      ],
                    ),
                  ),
                )
              else
                const Text('No location data yet'),
              const SizedBox(height: 30),
              ElevatedButton(
                onPressed:
                    _isForegroundRunning ? _stopForeground : _startForeground,
                style: ElevatedButton.styleFrom(
                  backgroundColor:
                      _isForegroundRunning ? Colors.red.shade100 : null,
                ),
                child: Text(_isForegroundRunning
                    ? 'Stop Foreground Sharing'
                    : 'Start Foreground Sharing'),
              ),
              const SizedBox(height: 10),
              ElevatedButton(
                onPressed:
                    _isBackgroundRunning ? _stopBackground : _startBackground,
                style: ElevatedButton.styleFrom(
                  backgroundColor:
                      _isBackgroundRunning ? Colors.orange.shade100 : null,
                ),
                child: Text(_isBackgroundRunning
                    ? 'Stop Background Sharing'
                    : 'Start Background Sharing'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}