How can i store locations even when device is not moving?

[wemersonrv]

Your Environment

• Plugin version: flutter_background_geolocation: ^1.7.1
• Platform: iOS or Android
• OS version: 8
• Device manufacturer / model: Motorola Moto G 5
• Flutter info (flutter doctor):

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.12.13+hotfix.8, on Microsoft Windows [versão 10.0.17763.678], locale pt-BR)

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[√] Android Studio (version 3.6)
[√] VS Code (version 1.43.2)
[√] Connected device (1 available)

• Plugin config:

bg.Config(
        desiredAccuracy: bg.Config.DESIRED_ACCURACY_MEDIUM,
        logLevel: bg.Config.LOG_LEVEL_OFF,
        disableElasticity: true,
        distanceFilter: 10,
        stopOnTerminate: false,
        startOnBoot: true,
        heartbeatInterval: 300,
        minimumActivityRecognitionConfidence: 40,
        persistMode: bg.Config.PERSIST_MODE_LOCATION,
        allowIdenticalLocations: true,
        debug: debug,
        notification: bg.Notification(
          priority: bg.Config.NOTIFICATION_PRIORITY_MIN,
          text: 'Suas horas estão sendo registradas!',
        ),
        extras: {
          'user': user, // Email do usuário
        },
      )

Expected Behavior

Need to capture points even when device is not moving.

Actual Behavior

Get location only when users walks.

Steps to Reproduce

Context

I only need to detect the user's position every X minutes, even if the device is not moving.

Debug logs

Logs

PASTE_YOUR_LOGS_HERE

[christocracy]

implement background_fetch callback. This plugin (also managed by Transistor Software) is already included as a dependency.

Execute BackgroundGeolocation.getCurrentPosition in your fetch callback.

[wemersonrv]

implement background_fetch callback. This plugin (also managed by Transistor Software) is already included as a dependency.

Execute BackgroundGeolocation.getCurrentPosition in your fetch callback.

Just need to implement background_fetch to awake the app and run BackgroundGeolocation.getCurrentPosition ?

I was trying it on heartBeat but only works when app is working. Understand now.

One last question: We use Firestore. So need to buy license for flutter_background_geolocationand background_geolocation_firebase ?

[christocracy]

One last question: We use Firestore. So need to buy license for flutter_background_geolocation and background_geolocation_firebase

Yes. The background_geolocation_firebase adapter is optional. You are, of course, free to manage your own firebase inserts using background-geolocation's onLocation event-handler in addition to a headless-task for the case where your Android app is terminated. It just a convenience adapter to make your life easier.

[wemersonrv]

questions:

1. Headeless task can work with a normal app? or only in apps without views? Works only on Android?
2. background_fetch works with Android and IOS ?

[christocracy]

Headeless task can work with a normal app?

Any Android app that has been terminated.

Works only on Android?

Yes, iOS has no such concept of running “headless”

[wemersonrv]

Headeless task can work with a normal app?

Any Android app that has been terminated.

Works only on Android?

Yes, iOS has no such concept of running “headless”

Ok, and about background_fetch... solve the problem on both OS ?

[christocracy]

Fetch has similar Android headless mechanism. If user terminates app, iOS stops firing fetch events. You absolutely have no ability to keep periodically requesting location when user explicitly terminates the iOS app.

However, the iOS background-geolocation plugin will automatically initiate location tracking in a terminated app when device moves about 200 meters.

[wemersonrv]

So, i cannot make my app to IOS if i expect capture user home position, if app is closed?

[christocracy]

So, i cannot make my app to IOS if i expect capture user home position, if app is closed?

If the iOS device is sitting stationary in the same place, correct. However, once the user moves ~200 meters, the background_geolocation plugin will cause the iOS app to automatically re-launch in the background and tracking will resume. Read the API docs for Config.stopOnTerminate.

[wemersonrv]

Hello @christocracy . There is a thing i don't understan.

You told me here that when device became stationary, and app closes, i can use background_fetch to make periodic captures in Androi but not in iOS, because background_fetch uses headless android specific feature... Ok, i understand that.

But, in background_fetch pub.dev page, it has an iOS badge... So, did you found a way to implement it in ios too ??

[christocracy]

Where did I tell you that?

[wemersonrv]

Here..

If the iOS device is sitting stationary in the same place, correct.

After i ask about not works on ios, even with background_fetch.

[christocracy]

Where did I say:

to make periodic captures in Androi but not in iOS

[wemersonrv]

Where did I say:

to make periodic captures in Androi but not in iOS

I make a short resume about all stuffs we discuss here... just that... at least, as I understand it.

The point is:

Your plugin is amazing, far beyond others. This is a fact and I congratulate you for that

But, my solution needs to capture positions every 15 (or 30) minutes even when device is in a fixed position all day. In Android is fine with background_fetch but in ios only when user moves ~200 meters, so i do nout found how to implement it,.. and in our interactions here i understand that is not possible in ios.

[christocracy]

iOS background_fetch will completely re-launch an app that was terminated by the os to service the event, just as if launched from the home-screen. However, If the user terminates the app, iOS halts fetch events. In that case, it’s impossible to do any time-based location tracking.

Sometimes, what you want on mobile (particularly iOS) is simply impossible.

[christocracy]

Also for iOS background_fetch, if the user doesn’t open your app daily, iOS will halt fetch events.