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precision medium - more fast geolocation

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This commit is contained in:
Valentin CZERYBA 2024-11-20 23:19:35 +01:00
parent 4d3533eb8a
commit 4a313fc725
2 changed files with 77 additions and 45 deletions
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82
covas_mobile/lib/pages/ListItemMenu.dart
View File

@ -1,3 +1,4 @@
import 'package:covas_mobile/classes/alert.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:flutter_dotenv/flutter_dotenv.dart'; // Import dotenv
@ -50,46 +51,63 @@ class _MyHomePageState extends State<ListItemMenu> {
// Fetching events from API
static Future<List<Events>> getPosts() async {
PermissionStatus status = await Permission.location.status;
final List<Events> body = [];
var url = Uri.parse("${globals.api}/events");
if (status.isGranted) {
print("Location permission granted");
// Get the current position with high accuracy
LocationSettings locationSettings = LocationSettings(
accuracy: LocationAccuracy.high,
distanceFilter:
10, // Optional: Minimum distance (in meters) to trigger location update
);
Position position = await Geolocator.getCurrentPosition(
locationSettings: locationSettings,
const LocationSettings locationSettings = LocationSettings(
accuracy: LocationAccuracy.medium,
timeLimit: Duration(seconds: 5),
);
// Calculate the boundaries
double radiusInKm = 50;
double latDistance = radiusInKm / 111.0;
double lonDistance =
radiusInKm / (111.0 * cos(position.latitude * pi / 180));
Position? position;
try {
position = await Geolocator.getCurrentPosition(
locationSettings: locationSettings);
} on LocationServiceDisabledException {
// Handle location services disabled
print('Location services are disabled.');
position = await Geolocator.getLastKnownPosition();
if (position == null) {
print('No last known position available.');
}
} catch (e) {
// Handle other errors
print('Failed to get location: $e');
position = await Geolocator.getLastKnownPosition();
if (position == null) {
print('No last known position available.');
}
}
if (position != null) {
// Calculate the boundaries
double radiusInKm = 50;
double latDistance = radiusInKm / 111.0;
double lonDistance =
radiusInKm / (111.0 * cos(position.latitude * pi / 180));
double minLat = position.latitude - latDistance;
double maxLat = position.latitude + latDistance;
double minLon = position.longitude - lonDistance;
double maxLon = position.longitude + lonDistance;
DateTime currentDatetime = DateTime.now();
url = Uri.parse("${globals.api}/events/search"
"?min_lat=$minLat&max_lat=$maxLat"
"&min_lon=$minLon&max_lon=$maxLon&current_datetime=${currentDatetime.toString()}");
}
SharedPreferences prefs = await SharedPreferences.getInstance();
var accessToken = prefs.getString("access_token") ?? "";
final List<Events> body = [];
if (accessToken.isNotEmpty) {
final response = await http.get(url, headers: {
"Content-Type": "application/json",
HttpHeaders.cookieHeader: "access_token=${accessToken}"
});
final List body = json.decode(utf8.decode(response.bodyBytes));
return body.map((e) => Events.fromJson(e)).toList();
double minLat = position.latitude - latDistance;
double maxLat = position.latitude + latDistance;
double minLon = position.longitude - lonDistance;
double maxLon = position.longitude + lonDistance;
DateTime currentDatetime = DateTime.now();
url = Uri.parse("${globals.api}/events/search"
"?min_lat=$minLat&max_lat=$maxLat"
"&min_lon=$minLon&max_lon=$maxLon&current_datetime=${currentDatetime.toString()}");
}
SharedPreferences prefs = await SharedPreferences.getInstance();
var accessToken = prefs.getString("access_token") ?? "";
if (accessToken.isNotEmpty) {
final response = await http.get(url, headers: {
"Content-Type": "application/json",
HttpHeaders.cookieHeader: "access_token=${accessToken}"
});
final List body = json.decode(utf8.decode(response.bodyBytes));
return body.map((e) => Events.fromJson(e)).toList();
}
}
return body;
}

40
covas_mobile/lib/pages/MapboxPages.dart
View File

@ -141,19 +141,33 @@ class _MapboxPagesState extends State<MapboxPages> with ShowErrorDialog {
"Location permissions are permanently denied. Enable them in settings.");
return;
}
LocationSettings locationSettings = LocationSettings(
accuracy: LocationAccuracy.high,
distanceFilter:
10, // Optional: Minimum distance (in meters) to trigger location update
);
Position position = await Geolocator.getCurrentPosition(
locationSettings: locationSettings,
);
setState(() {
userPosition = LatLng(position.latitude, position.longitude);
isUserPositionInitialized = true;
});
const LocationSettings locationSettings = LocationSettings(
accuracy: LocationAccuracy.medium, timeLimit: Duration(seconds: 5));
Position? position;
try {
position = await Geolocator.getCurrentPosition(
locationSettings: locationSettings);
} on LocationServiceDisabledException {
// Handle location services disabled
print('Location services are disabled.');
position = await Geolocator.getLastKnownPosition();
if (position == null) {
print('No last known position available.');
}
} catch (e) {
// Handle other errors
print('Failed to get location: $e');
position = await Geolocator.getLastKnownPosition();
if (position == null) {
print('No last known position available.');
}
}
if (position != null) {
setState(() {
userPosition = LatLng(position!.latitude, position!.longitude);
isUserPositionInitialized = true;
});
}
_initToken();
_getEventInfo();
} catch (e) {