Why would google maps not show up in flutter?

Question

I have generated an API key from google cloud and also enabled Maps SDK for android and ios. Also i entered the API key in : AndroidManifest.xml. But the map won't show up, just a grey screen. Like the one below. Therefore what is the ultimate solution to this problem?

AndroidManifest.xml

gmap.dart() file:

import 'dart:collection';

import 'package:flutter/material.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';

class GMap extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
        appBar: AppBar(
          backgroundColor: Colors.deepPurple,
        ),
        body: SingleChildScrollView(
          child: Column(
            children: [
              Padding(
                padding: const EdgeInsets.only(top: 8.0),
                child: Container(
                  height: MediaQuery.of(context).size.height / 2,
                  width: MediaQuery.of(context).size.width,
                  child: GoogleMap(
                    initialCameraPosition:
                        CameraPosition(target: LatLng(29.9792, 31.1342)),
                    zoomGesturesEnabled: true,
                  ),
                ),
              )
            ],
          ),
        ),
      ),
    );
  }
}

main.dart()

import 'package:ambulance_tracker/Screens/gmap.dart';
import 'package:flutter/material.dart';
import 'package:location/location.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'GMap Try',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.deepPurple,
      ),
      home: GMap(),
    );
  }
}

pubspec.yaml:

name: ambulance_tracker
description: A new Flutter project.

# The following line prevents the package from being accidentally published to
# pub.dev using `pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.7.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.3
  firebase_auth: ^0.18.0+1
  firebase_core: ^0.5.0
  flutter_svg: ^0.18.0
  google_maps_flutter: ^0.5.32
  location: ^2.5.0
  
dev_dependencies:
  flutter_test:
    sdk: flutter

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  assets:
    - assets/images/
  #   - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages

Image of the app screen:

enter image description here

jabamataro · Accepted Answer

You defined on your API key on your AndroidManifest.xml file like this:

This is causing error because of the key= in the string which makes the Google Maps SDK recognize an invalid API key that is why your map is only showing a grey screen.

The API key should be defined like this instead, removing the key= from the string itself:

Why would google maps not show up in flutter?

Answers (2)

Related Questions