How keep track of a walk in a google map in kotlin - google-maps

Question

I' m trying to keep track of a walk using google maps API in kotlin.
For now I get only the last known current location ( which actually is not the real current one)
This is mine MapsActivity code:
import android.content.pm.PackageManager
import android.location.Location
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import com.example.macc_project.R
import com.google.android.gms.location.FusedLocationProviderClient
import com.google.android.gms.location.LocationServices
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.Marker
class MapsActivity : AppCompatActivity(), OnMapReadyCallback, GoogleMap.OnMarkerClickListener {
override fun onMarkerClick(p0: Marker?): Boolean {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
companion object {
private const val LOCATION_PERMISSION_REQUEST_CODE = 1
}
private lateinit var map: GoogleMap
private lateinit var lastLocation: Location
private lateinit var fusedLocationClient: FusedLocationProviderClient
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_maps_google)
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
val mapFragment = supportFragmentManager
.findFragmentById(R.id.map) as SupportMapFragment
mapFragment.getMapAsync(this)
fusedLocationClient = LocationServices.getFusedLocationProviderClient(this)
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
override fun onMapReady(googleMap: GoogleMap) {
map = googleMap
map.uiSettings.isZoomControlsEnabled = true
map.setOnMarkerClickListener(this)
setUpMap()
}
private fun setUpMap() {
if (ActivityCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
arrayOf(android.Manifest.permission.ACCESS_FINE_LOCATION), LOCATION_PERMISSION_REQUEST_CODE)
return
}
// 1
map.isMyLocationEnabled = true
// 2
fusedLocationClient.lastLocation.addOnSuccessListener(this) { location ->
// Got last known location. In some rare situations this can be null.
// 3
if (location != null) {
lastLocation = location
val currentLatLng = LatLng(location.latitude, location.longitude)
map.animateCamera(CameraUpdateFactory.newLatLngZoom(currentLatLng, 12f))
}
}
}
}
How can I keep track of the entire walk that I do? For example painting a blue line that follows my walk, from an initial state to a final one