Android Question Run GPS Tracker Service in Sleep Mode

AndroidMadhu · Oct 28, 2020

Hello,
I am trying to develop GPS Tracker Service, and my app is running fine when the App is Alive.
But when the App is in Sleep mode or in background the GPS tracker is not working and not providing any lat/long after some time.

The below link I am following but it is not working. After 1 minute of sleep the GPS tracking stop sending lat/long.

https://www.b4x.com/android/forum/threads/continous-background-gps-tracking.110628/#content

https://www.b4x.com/android/forum/threads/background-location-tracking.99873/

The below is the code block:

B4X:

 Sub Service_Create
Service.AutomaticForegroundMode = Service.AUTOMATIC_FOREGROUND_NEVER 'we are handling it ourselves
GPS.Initialize("gps")
lock.PartialLock
End Sub

Sub Service_Start (StartingIntent As Intent)
Service.StartForeground(nid, CreateNotification("..."))
StartServiceAt(Me, DateTime.Now + 30 * DateTime.TicksPerMinute, True)
Track
End Sub

B4X:

 Public Sub Track
If Tracking Then Return
If Main.rp.Check(Main.rp.PERMISSION_ACCESS_FINE_LOCATION) = False Then
Log("No permission")
Return
End If
GPS.Start(0, 0)
Tracking = True
End Sub

Sub GPS_LocationChanged (Location1 As Location)
Dim strLoc As String
If DateTime.Now > LastUpdateTime + 10 * DateTime.TicksPerSecond Then
Dim n As Notification = CreateNotification($"$2.5{Location1.Latitude} / $2.5{Location1.Longitude}"$)
n.Notify(nid)
LastUpdateTime = DateTime.Now
gpslat = Location1.Latitude
gpslong = Location1.Longitude
If gpslat>0 And gpslong>0 Then
'CallSubDelayed2(Main,"Update_Location",Location1)
Dim bc As ByteConverter

strLoc=gpslat & "/" &gpslong '& qrActivity.sessionId ''''"newloc_" &
If Starter.mqtt.Connected Then

Starter.mqtt.Publish("driver_" & qrActivity.sessionId,bc.StringToBytes(strLoc ,"UTF8"))

Else
Log("MQTT not connected")
End If
ToastMessageShow(gpslat & "/" &gpslong,True)
End If
End If
End Sub

Please advice on this.....

Thanks

TILogistic · Oct 28, 2020

Read:

Background Location/Tracking and Android 10+

Hello community, In this (https://www.b4x.com/android/forum/threads/background-location-tracking.99873/#content) thread, @Erel talks about the new implementation of GPS background tracking and Android 10+, which requires the line SetServiceAttribute(Tracker, android:foregroundServiceType...

www.b4x.com

AndroidMadhu · Oct 28, 2020

Hello,
@oparra ..... I have read the above doc.
But when I am adding the below parameter at manifest file I am getting the error during build:

B4X:

SetServiceAttribute(Tracker, android:foregroundServiceType, "location")

The Error :

B4X:

AndroidManifest.xml:67: error: No resource identifier found for attribute 'foregroundServiceType' in package 'android'

AAPT path: C:\Android_B4A\tools\..\build-tools\27.0.1\aapt.exe
Exit code:1

Please advice

TILogistic · Oct 28, 2020

you are using this method

Background location tracking

Simple example of a foreground service that keeps the process running in the background. The current location is shown in the persistent notification. The app starts at boot and theoretically should run all the time. It also schedules itself to run with StartServiceAt. This can help in cases...

www.b4x.com

AndroidMadhu · Oct 28, 2020

oparra said:
you are using this method

@oparra .... I am confused a bit...... Do you point that I am following the wrong one?

Thanks

DonManfred · Oct 28, 2020

You targetsdk is set to 29?

TILogistic · Oct 28, 2020

DonManfred said:
You targetsdk is set to 29?

yes

AndroidMadhu · Oct 28, 2020

DonManfred said:
You targetsdk is set to 29?

B4X:

<uses-sdk android:minSdkVersion="24" android:targetSdkVersion="29"/>
<supports-screens android:largeScreens="true"
      android:normalScreens="true"
      android:smallScreens="true"
      android:anyDensity="true"/>)

Thanks

TILogistic · Oct 28, 2020

test away from home to detect GPS positions

AndroidMadhu · Oct 28, 2020

oparra said:
yes

I am using B4A v 9.80

AndroidMadhu · Oct 28, 2020

oparra said:
test away from home to detect GPS positions

Initially the App is running fine for 2 or 5 minutes in background. But after that GPS stop providing the location Lat/long

TILogistic · Oct 28, 2020

DonManfred · Oct 28, 2020

AndroidMadhu said:
I am using B4A v 9.80

Start with updating to 10.2
Also reinstall the SDK as described in the 10.2 Update

Also note that you need to set the path to android.jar from platform 29 in Tools-Configure Paths

Follow the installations instructions cartefully: https://www.b4x.com/b4a.html

TILogistic · Oct 28, 2020

version 10.2

B4X:

'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: https://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="29"/>
<supports-screens android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
CreateResourceFromFile(Macro, Themes.DarkTheme)
'End of default text.

SetServiceAttribute(Tracker, android:foregroundServiceType, "location")

TILogistic · Oct 28, 2020

DonManfred said:
You targetsdk is set to 29?

you do not sleep.

I had not slept for 2 days working.

and today I woke up early like new

DonManfred · Oct 28, 2020

oparra said:
you do not sleep

Surely i do. 8 hours a day since i know i do have SleepApnea.

TILogistic · Oct 28, 2020

DonManfred said:
Surely i do. 8 hours a day since i know i do have SleepApnea.

AndroidMadhu · Oct 28, 2020

DonManfred said:
Start with updating to 10.2
Also reinstall the SDK as described in the 10.2 Update

I have updated to 10.2. Now after going to background the App working for 5 mins. Then GPS stop working.

please advice on this please....

Alex_197 · Oct 28, 2020

AndroidMadhu said:
I have updated to 10.2. Now after going to background the App working for 5 mins. Then GPS stop working.

please advice on this please....

Did you run your code in Debug mode or in Release? In Debug - it will not work in background more than 5 minutes.
If it's 5 minutes in Release mode - try to implement a time into Starter - I played with it and it works for for 30 minutes (I don't need more).

Also see this thread - similar to your problem how to add a timer https://www.b4x.com/android/forum/t...g-put-to-sleep-by-android.123903/#post-774138

AndroidMadhu · Oct 28, 2020

Alex_197 said:
try to implement a time into Starter

@Alex_197 .. Could you please provide some sudo code as how to implement a Timer and call GPS service into starter.

Thanks

Android Question Run GPS Tracker Service in Sleep Mode

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