innacurate getCurrentPosition

sergiomartell commented 4 days ago

Your Environment

Plugin version: 4.16.0
Platform: Android
OS version: 13
Device manufacturer / model: Google Pixel 4
Flutter info (flutter doctor): Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel stable, 3.24.0, on macOS 15.0 24A335 darwin-arm64, locale en-MX) [✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0-rc1) [!] Xcode - develop for iOS and macOS (Xcode 16.0) ! iOS 18.0 Simulator not installed; this may be necessary for iOS and macOS development. To download and install the platform, open Xcode, select Xcode > Settings > Platforms, and click the GET button for the required platform.

For more information, please visit: https://developer.apple.com/documentation/xcode/installing-additional-simulator-runtimes [✓] Chrome - develop for the web [✓] Android Studio (version 2024.1) [✓] VS Code (version 1.93.1) [✓] Connected device (5 available) [✓] Network resources

Plugin config:


Future<bg.Location> getCurrentLoc() {
return bg.BackgroundGeolocation.getCurrentPosition(
  maximumAge: 0,
  persist: false, // <-- do not persist this location
  desiredAccuracy: 50, // <-- desire best possible accuracy
  timeout: 3000, // <-- wait 30s before giving up.
  samples: 1,
);
}

bg.BackgroundGeolocation.ready(bg.Config(
    desiredAccuracy: bg.Config.DESIRED_ACCURACY_HIGH,
    distanceFilter: 100.0,
    stopOnTerminate: false,
    stopOnStationary: true,
    startOnBoot: true,
    stationaryRadius: 50,
    debug: false,
    logLevel: bg.Config.LOG_LEVEL_WARNING,
    reset: true,
    params: params,
    url: '${Global.endpoint}/BackgroundGeolocation',
  )).then((bg.State state) {
    if (!state.enabled) {
      ////
      // 3.  Start the plugin.
      //
      bg.BackgroundGeolocation.start();
    }
  });
} catch (error) {
  debugPrint(error.toString());
}
}


## Expected Behavior
<!--- Tell us what should happen -->
I need to get lat long pairs that are with 10 meter accuracy

## Actual Behavior
<!--- Tell us what happens instead -->
[Location {odometer: 0.0, activity: {confidence: 100, type: still}, extras: {}, battery: {level: 0.99, is_charging: false}, uuid: ...., sample: true, age: 15, coords: {altitude: -1.0, heading: -1.0, latitude: 19.423423423423422, accuracy: 2000.0, heading_accuracy: -1.0, altitude_accuracy: 0.0, speed_accuracy: -1.0, speed: -1.0, age: 18, longitude: -99.17595377344381, ellipsoidal_altitude: -1.0}, is_moving: false, timestamp: 2024-09-29T23:57:15.385Z}]

Getting a location ~2km away

## Steps to Reproduce
<!--- reproduce this issue; include code to reproduce, if relevant -->
1.
2.
3.
4.

## Context
<!--- What were you trying to do? -->

## Debug logs
<!-- include iOS / Android logs
- ios XCode logs,
- use #getLog #emailLog methods (@see docs)
- Android: $ adb logcat -s TSLocationManager
-->
<details>
    <summary>Logs</summary>

``` <!-- syntax-highligting:  DO NOT REMOVE -->
PASTE_YOUR_LOGS_HERE

christocracy commented 4 days ago

go outside. GPS only works outdoors.
Ensure you’ve not disabled wifi.
.getCurrentPosition automatically requests highest possible accuracy. Your device is simply failing to provide an accurate location.

sergiomartell commented 4 days ago

I know how GPS works, but a 2 kilometer discrepancy is not normal, 50 meters being inside is acceptable.

christocracy commented 4 days ago

It’s due to your device (settings) and / or environment.

open Google maps and you’ll experience the same phenomenon.

sergiomartell commented 3 days ago

Google Maps is getting my location to 5 meters on the device, and we are getting the same result (of an accuracy of 2km) in 2 devices a Pixel 4 and a Samsung Galaxy. And I have tested with the device outside getting also the same result. Any idea why this is happening?

christocracy commented 3 days ago

I have no idea. Are you observing the plug-in logs in adb logcat? See wiki “Debugging”.

I field test almost every day for the last 10 years. I see nothing but excellent accuracy.

sergiomartell commented 3 days ago

These are the logs: I/flutter (12202): "notification": { I/flutter (12202): "layout": "", I/flutter (12202): "title": "", I/flutter (12202): "text": "Location Service activated", I/flutter (12202): "color": "", I/flutter (12202): "channelName": "TSLocationManager", I/flutter (12202): "channelId": "", I/flutter (12202): "smallIcon": "", I/flutter (12202): "largeIcon": "", I/flutter (12202): "priority": -1, I/flutter (12202): "sticky": false, I/flutter (12202): "strings": {}, I/flutter (12202): "actions": [] I/flutter (12202): }, I/flutter (12202): "params": {}, I/flutter (12202): "persist": true, I/flutter (12202): "persistMode": 2, I/flutter (12202): "schedule": [], I/flutter (12202): "scheduleUseAlarmManager": false, I/flutter (12202): "speedJumpFilter": 300, I/flutter (12202): "startOnBoot": true, I/flutter (12202): "stationaryRadius": 50, I/flutter (12202): "stopAfterElapsedMinutes": 0, I/flutter (12202): "stopOnStationary": true, I/flutter (12202): "stopOnTerminate": false, I/flutter (12202): "stopTimeout": 5, I/flutter (12202): "triggerActivities": "in_vehicle, on_bicycle, on_foot, running, walking", I/flutter (12202): "url": "https:\/\/us-central1-aqui-no-d98af.cloudfunctions.net\/\/BackgroundGeolocation", I/flutter (12202): "useSignificantChangesOnly": false, I/flutter (12202): "enabled": true, I/flutter (12202): "schedulerEnabled": false, I/flutter (12202): "trackingMode": 1, I/flutter (12202): "odometer": 0, I/flutter (12202): "isFirstBoot": false, I/flutter (12202): "didLaunchInBackground": false, I/flutter (12202): "didDeviceReboot": false I/flutter (12202): } I/flutter (12202): ╠═════════════════════════════════════════════ I/flutter (12202): I/flutter (12202): 09-30 11:17:31.134 DEBUG [LocationAuthorization withBackgroundPermission] I/flutter (12202): ℹ️ LocationAuthorization: Permission granted I/flutter (12202): 09-30 11:17:31.140 DEBUG [HttpService startMonitoringConnectivityChanges] I/flutter (12202): 🎾 Start monitoring connectivity changes I/flutter (12202): 09-30 11:17:31.141 DEBUG [DeviceSettings startMonitoringPowerSaveChanges] I/flutter (12202): 🎾 Start monitoring powersave changes I/flutter (12202): 09-30 11:17:31.145 INFO [ActivityRecognitionService start] I/flutter (12202): 🎾 Start motion-activity updates I/flutter (12202): 09-30 11:17:31.149 INFO [HeartbeatService stop] I/flutter (12202): 🔴 Stop heartbeat I/flutter (12202): 09-30 11:17:31.170 INFO [TSLocationManager a] I/flutter (12202): ╔═════════════════════════════════════════════ I/flutter (12202): ║ motionchange LocationResult: 1 (343508ms old) I/flutter (12202): ╠═════════════════════════════════════════════ I/flutter (12202): ╟─ 📍 Location[fused 19.423423,-99.175954 hAcc=2000.0 et=+5d5h13m25s942ms], time: 1727716307661 I/flutter (12202): I/flutter (12202): 09-30 11:17:31.171 DEBUG [TSLocationManager a] Median accuracy: 2000.0 I/flutter (12202): 09-30 11:17:31.188 DEBUG [LocationAuthorization withPermission] I/flutter (12202): ℹ️ LocationAuthorization: Permission granted I/flutter (12202): 09-30 11:17:31.213 DEBUG [AbstractService a] I/flutter (12202): 🎾 start [LocationRequestService startId: 1, eventCount: 1] I/flutter (12202): 09-30 11:17:31.215 INFO [SingleLocationRequest startUpdatingLocation] I/flutter (12202): 🔵 [SingleLocationRequest start, action: 1, requestId: 1] I/flutter (12202): 09-30 11:17:31.217 DEBUG [AbstractService a] I/flutter (12202): ⚙️︎ FINISH [LocationRequestService startId: 1, eventCount: 0, sticky: true] I/flutter (12202): 09-30 11:17:31.254 DEBUG [AbstractService a] I/flutter (12202): 🎾 1:1 [LocationRequestService startId: 2, eventCount: 1] I/flutter (12202): 09-30 11:17:31.256 INFO [TSLocationManager a] I/flutter (12202): ╔═════════════════════════════════════════════ I/flutter (12202): ║ motionchange LocationResult: 1 (26ms old) I/flutter (12202): ╠═════════════════════════════════════════════ I/flutter (12202): ╟─ 📍 Location[fused 19.423423,-99.175954 hAcc=2000.0 et=+5d5h19m9s510ms], time: 1727716651229 I/flutter (12202): I/flutter (12202): 09-30 11:17:31.256 DEBUG [TSLocationManager a] Median accuracy: 2000.0 I/flutter (12202): 09-30 11:17:31.259 DEBUG [AbstractService a] I/flutter (12202): ⚙️︎ FINISH [LocationRequestService startId: 2, eventCount: 0, sticky: true] I/flutter (12202): 09-30 11:17:31.421 DEBUG [TSLocationManagerActivity a] locationsettings I/flutter (12202): 09-30 11:17:31.422 DEBUG [TSConfig translateDesiredAccuracy] translateDesiredAccuracy (true): -2 I/flutter (12202): 09-30 11:17:31.477 DEBUG [TSLocationManagerActivity c] eventCount: 0 I/flutter (12202): 09-30 11:17:31.579 DEBUG [TSLocationManagerActivity onDestroy] I/flutter (12202): D/TSLocationManager(12202): [c.t.l.service.AbstractService a] D/TSLocationManager(12202): 🎾 start [ActivityRecognitionService startId: 1, eventCount: 1] D/TSLocationManager(12202): [c.t.l.s.ActivityRecognitionService a] D/TSLocationManager(12202): 🚘 ️DetectedActivity [type=STILL, confidence=100] D/TSLocationManager(12202): [c.t.l.service.AbstractService a] D/TSLocationManager(12202): ⚙️︎ FINISH [ActivityRecognitionService startId: 1, eventCount: 0, sticky: false] D/TSLocationManager(12202): [c.t.l.service.AbstractService f] D/TSLocationManager(12202): ⚙️︎ ActivityRecognitionService.stopSelfResult(1): true D/TSLocationManager(12202): [c.t.l.service.AbstractService onDestroy] D/TSLocationManager(12202): 🔴 ActivityRecognitionService stopped I/TRuntime.CctTransportBackend(12202): Making request to: https://firebaselogging-pa.googleapis.com/v1/firelog/legacy/batchlog D/TrafficStats(12202): tagSocket(130) with statsTag=0xffffffff, statsUid=-1 I/TRuntime.CctTransportBackend(12202): Status Code: 200

sergiomartell commented 3 days ago

I am still getting the hAcc=2000.0 And the request is for "High Accuracy"

christocracy commented 3 days ago

[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0-rc1)

I suggest you update your Android SDK to latest (35). Play Store Console won't even allow apps with targetSdkVersion < 33.

Also, ensure you're using the latest version of play-services-location (see your android/build.gradle ext.playServicesLocationVersion. The latest version is 21.3.0.

christocracy commented 3 days ago

After doing all that, go outside for a 1km walk. Once you return, use Logger.emailLog to fetch the plugin's log database (which saves 3 days worth of logs).

christocracy commented 3 days ago

And try installing the /example app from this repo on your device.

You can also install it from the Play Store: https://play.google.com/store/apps/details?id=com.transistorsoft.flutterbackgroundgeolocationexample&pli=1

The demo app posts locations to the demo server at https://tracker.transistorsoft.com

sergiomartell commented 3 days ago

I am getting this error when moving to SDK 35 Note: /Users/sergiomartell/.pub-cache/hosted/pub.dev/background_fetch-1.3.5/android/src/main/java/com/transistorsoft/flutter/backgroundfetch/BackgroundFetchPlugin.java uses or overrides a deprecated API.

christocracy commented 3 days ago

It's not an error, it's a warning. It was fixed in 1.3.7

transistorsoft / flutter_background_geolocation

innacurate getCurrentPosition #1358

Your Environment