Flutter - Open Location in Maps

If you want to use address instead of lat, long, you can use the following.

Referencing https://developers.google.com/maps/documentation/urls/ios-urlscheme, daddr Sets the end point for directions searches

final url = 'comgooglemaps://?daddr=${Uri.encodeFull(address)}&directionsmode=driving';
    if (await canLaunch(url)) {
      await launch(url);
    } else {
      throw 'Could not launch $url';
    }

and don't forget to add to Info.plist

<key>LSApplicationQueriesSchemes</key>
<array>
    <string>comgooglemaps</string>
</array>

I created a plugin Map Launcher for that.

To find installed maps on a device you can use:

import 'package:map_launcher/map_launcher.dart';

final availableMaps = await MapLauncher.installedMaps;

And then launch by calling showMarker on it

await availableMaps.first.showMarker(
  coords: Coords(31.233568, 121.505504),
  title: "Shanghai Tower",
  description: "Asia's tallest building",
);

Or just check if map available and launch it if so

if (await MapLauncher.isMapAvailable(MapType.google)) {
  await MapLauncher.launchMap(
    mapType: MapType.google,
    coords: coords,
    title: title,
    description: description,
  );
}

This solution will work on both Android and iOS platforms.

import 'dart:io' show Platform;

import 'package:flutter/foundation.dart';
import 'package:url_launcher/url_launcher.dart';

class MapsLauncher {

 static String createQueryUrl(String query) {
  var uri;

  if (kIsWeb) {
   uri = Uri.https(
      'www.google.com', '/maps/search/', {'api': '1', 'query': query});
  } else if (Platform.isAndroid) {
   uri = Uri(scheme: 'geo', host: '0,0', queryParameters: {'q': query});
  } else if (Platform.isIOS) {
   uri = Uri.https('maps.apple.com', '/', {'q': query});
  } else {
   uri = Uri.https(
      'www.google.com', '/maps/search/', {'api': '1', 'query': query});
 }

 return uri.toString();
 }

static String createCoordinatesUrl(double latitude, double longitude,
  [String? label]) {
 var uri;

 if (kIsWeb) {
   uri = Uri.https('www.google.com', '/maps/search/',
      {'api': '1', 'query': '$latitude,$longitude'});
 } else if (Platform.isAndroid) {
   var query = '$latitude,$longitude';

   if (label != null) query += '($label)';

   uri = Uri(scheme: 'geo', host: '0,0', queryParameters: {'q': query});
 } else if (Platform.isIOS) {
   var params = {'ll': '$latitude,$longitude'};

   if (label != null) params['q'] = label;

   uri = Uri.https('maps.apple.com', '/', params);
 } else {
   uri = Uri.https('www.google.com', '/maps/search/',
      {'api': '1', 'query': '$latitude,$longitude'});
 }

 return uri.toString();
 }

 static Future<bool> launchQuery(String query) {
  return launch(createQueryUrl(query));
 }

 static Future<bool> launchCoordinates(double latitude, double longitude,
  [String? label]) {
 return launch(createCoordinatesUrl(latitude, longitude, label));
 }
}

Call it like this: MapsLauncher.launchCoordinates( 37.4220041, -122.0862462, "address");

Yes you can do that using the url_launcher plugin. The following code will open Google Maps when the app is installed on the phone (otherwise it will open the browser):

void _launchMapsUrl(double lat, double lon) async {
  final url = 'https://www.google.com/maps/search/?api=1&query=$lat,$lon';
  if (await canLaunch(url)) {
    await launch(url);
  } else {
    throw 'Could not launch $url';
  }
}