Added route poly lines to map

lib/main.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:google_map/polygone_screen.dart';
+import 'package:google_map/polyline_screen.dart';
 
 void main() {
   runApp(const MyApp());
@@ -16,7 +16,7 @@ class MyApp extends StatelessWidget {
       theme: ThemeData(
         primarySwatch: Colors.blue,
       ),
-      home: const PolygoneScreen(),
+      home: const PolylineScreen(),
     );
   }
 }

lib/polyline_screen.dart

@@ -0,0 +1,81 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:google_maps_flutter/google_maps_flutter.dart';
+
+class PolylineScreen extends StatefulWidget {
+  const PolylineScreen({super.key});
+
+  @override
+  State<PolylineScreen> createState() => _PolylineScreenState();
+}
+
+class _PolylineScreenState extends State<PolylineScreen> {
+  final Completer<GoogleMapController> _controller = Completer();
+
+  static const CameraPosition _kGooglePlex = CameraPosition(
+    target: LatLng(
+      33.738045,
+      73.084488,
+    ),
+    zoom: 14,
+  );
+
+  final Set<Marker> _markers = {};
+  final Set<Polyline> _polyline = {};
+
+  List<LatLng> latlng = [
+    const LatLng(
+      33.738045,
+      73.084488,
+    ),
+    const LatLng(
+      33.567997728,
+      72.635997456,
+    )
+  ];
+
+  @override
+  void initState() {
+    super.initState();
+    for (int i = 0; i < latlng.length; i++) {
+      _markers.add(
+        Marker(
+          markerId: MarkerId(
+            i.toString(),
+          ),
+          position: latlng[i],
+          infoWindow: const InfoWindow(
+            title: "Really cool place",
+            snippet: "5 star rating",
+          ),
+          icon: BitmapDescriptor.defaultMarker,
+        ),
+      );
+      setState(() {});
+      _polyline.add(
+        Polyline(
+          polylineId: const PolylineId('1'),
+          points: latlng,
+          color: Colors.orange,
+        ),
+      );
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: GoogleMap(
+        myLocationEnabled: true,
+        mapType: MapType.normal,
+        polylines: _polyline,
+        initialCameraPosition: _kGooglePlex,
+        markers: _markers,
+        onMapCreated: (GoogleMapController controller) {
+          _controller.complete(controller);
+        },
+      ),
+    );
+  }
+}