direct location using google maps application - flutter

Question

// custom function to locate the location to direct using google maps app
Future<void> openMap(List<CustAddressModel>latitude,longitude) async {
String googleUrl = 'https://www.google.com/maps/search/?api=1&query=$latitude,$longitude';
await canLaunchUrlString(googleUrl)
? await launchUrlString(googleUrl)
: throw 'Could not launch google map $googleUrl';
}
#override
void initState() {
// TODO: implement initState
super.initState();
custLocation();
}
}
Here i want to custom function openMap() where user can click button to direct the location using google maps app. Location 1 where the seller location i retrieve from database and the location 2 is customer location i retrieve from database also. Now i want to pass the lat and long from both location 1 and 2, so that user can direct to google maps app to direct to seller location

Answer 1

you can use the packege url_launcher and then add following code:
import 'package:url_launcher/url_launcher.dart';
class MapUtils {
MapUtils._();
static Future<void> openMap(double latitude, double longitude) async {
String googleUrl = 'https://www.google.com/maps/search/?api=1&query=$latitude,$longitude';
if (await canLaunch(googleUrl)) {
await launch(googleUrl);
} else {
throw 'Could not open the map.';
}
}
}
Now you can open google maps in your app just call this method:
onTap: () {
final snapshot = await Firestore.instance.collection("collectionName").document('docId').get();
final lat = snapshot.data['latitude'];
final long = snapshot.data['longitude'];
MapUtils.openMap(lat, long);
};
On iOS you need to do some extra steps is that, write following lines in info.plist file
<key>LSApplicationQueriesSchemes</key>
<array>
<string>googlechromes</string>
<string>comgooglemaps</string>
</array>