Exposes Location updates from Android's LocationManager as a Flow. Also see https://gist.github.com/LouisCAD/0a648e2b49942acd2acbb693adfaa03a

AndroidLocationFlow.kt

import android.location.Criteria
import android.location.Location
import android.location.LocationListener
import android.Manifest
import android.os.Bundle
import androidx.annotation.RequiresApi
import kotlinx.coroutines.*
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.callbackFlow
import splitties.systemservices.locationManager // See https://splitties.louiscad.com/modules/systemservices/

@RequiresApi(anyOf = [Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION])
fun androidLocationFlow(
    providerCriteria: Criteria,
    minTime: Long,
    minDistance: Float
): Flow<Location> = callbackFlow {

    val provider = locationManager.getBestProvider(providerCriteria, true /* enabled only */)

    val listener = object : LocationListener {
        override fun onLocationChanged(location: Location) {
            trySend(location)
        }

        override fun onStatusChanged(provider: String?, status: Int, extras: Bundle?) = Unit
        override fun onProviderEnabled(provider: String?) = Unit
        override fun onProviderDisabled(provider: String?) = Unit
    }
    locationManager.requestLocationUpdates(provider, minTime, minDistance, listener)
    launch {
        val lastKnownLocation = Dispatchers.IO {
            locationManager.getLastKnownLocation(provider)
        }
        trySend(lastKnownLocation)
    }
    awaitClose {
        locationManager.removeUpdates(listener)
    }
}