location line

android/GPSMapDemo/app/src/main/java/ee/taltech/mobile2020/gpsmapdemo/MapsActivity.kt

@@ -29,9 +29,9 @@ class MapsActivity : AppCompatActivity(), OnMapReadyCallback, LocationListener {
     private lateinit var locationManager: LocationManager;
     private var provider : String? = ""
     private var location: Location? = null
-    private val polylineOptions = PolylineOptions().width(5f)
+    private val polylineOptions = PolylineOptions().width(10f)
             .color(Color.RED)
-    private lateinit var polyLine : Polyline
+    private  var polyLine : Polyline? = null;
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -116,7 +116,7 @@ class MapsActivity : AppCompatActivity(), OnMapReadyCallback, LocationListener {
         // remove the old polyline from map
         // or you will just add lines on top of each other and run out of memory
         if (polyLine != null) {
-            polyLine.remove();
+            polyLine!!.remove()
         }
         polylineOptions.add(markerLatLng)
         polyLine = mMap.addPolyline(polylineOptions)