google-mapsflutter

Open Google Maps app if available with flutter

I'm trying to detect whether Google Maps app is installed on iOS, and if so, launch it, if not, launch Apple Maps. Here is what I have so far, but on my phone with Google Maps installed, it isn't detecting it and launching appropriately.

Any ideas?

import 'package:url_launcher/url_launcher.dart';

_launchMaps() async {
  String googleUrl =
    'comgooglemaps://?center=${trip.origLocationObj.lat},${trip.origLocationObj.lon}';
  String appleUrl =
    'https://maps.apple.com/?sll=${trip.origLocationObj.lat},${trip.origLocationObj.lon}';
  if (await canLaunch("comgooglemaps://")) {
    print('launching com googleUrl');
    await launch(googleUrl);
  } else if (await canLaunch(appleUrl)) {
    print('launching apple url');
    await launch(appleUrl);
  } else {
    throw 'Could not launch url';
  }
}

I pulled the url scheme from here: How would I be able to open google maps when I press a button in my app?

Solution

  • I found my issue: this needs to be in the plist file. The code in the question above is fine. (The SO answer referenced in the question only mentioned the "comgooglemaps" string.)

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

    Docs: https://developers.google.com/maps/documentation/ios-sdk/start#step_7_declare_the_url_schemes_used_by_the_api