Using Google Maps in Flutter application Using Url Launcher

First of all we need the Url Launcher dependices from pub dev:

url_launcher: ^6.0.7

Then we define a class as such:

import 'package:url_launcher/url_launcher.dart';

// if we need to use lat long we use the first function
class MapUtils {
  MapUtils._();

  static Future<void> openMap(double latitude, double longitude) async {
    String googleUrl =
        'https://www.google.com/maps/dir/?api=1&destination=$latitude,$longitude';
    if (await canLaunch(googleUrl)) {
      await launch(googleUrl);
    } else {
      throw 'Could not open the map.';
    }
  } 

// if a normal query is to be resolved use the second function
  void launchMap(String address) async {
    String query = Uri.encodeComponent(address);
    String googleUrl = "https://www.google.com/maps/search/?api=1&query=$query";

    if (await canLaunch(googleUrl)) {
      await launch(googleUrl);
    }
  }

All that is left to do just call the function from wherever u want to launch google maps directions and if you want something else go through the Google maps Url documentation.