@sowouldyoutech/google-maps

@capacitor/google-maps

Google maps on Capacitor

Install

npm install @sowouldyoutech/google-maps
npx cap sync

API Keys

To use the Google Maps SDK on any platform, API keys associated with an account with billing enabled are required. These can be obtained from the Google Cloud Console. This is required for all three platforms, Android, iOS, and Javascript. Additional information about obtaining these API keys can be found in the Google Maps documentation for each platform.

iOS

The Google Maps SDK supports the use of showing the users current location via enableCurrentLocation(bool). To use this, Apple requires privacy descriptions to be specified in Info.plist:

• NSLocationAlwaysUsageDescription (Privacy - Location Always Usage Description)
• NSLocationWhenInUseUsageDescription (Privacy - Location When In Use Usage Description)

Read about Configuring Info.plist in the iOS Guide for more information on setting iOS permissions in Xcode.

The Google Maps SDK currently does not support running on simulators using the new M1-based Macbooks. This is a known and acknowledged issue and requires a fix from Google. If you are developing on a M1 Macbook, building and running on physical devices is still supported and is the recommended approach.

Android

The Google Maps SDK for Android requires you to add your API key to the AndroidManifest.xml file in your project.

<meta-data android:name="com.google.android.geo.API_KEY" android:value="YOUR_API_KEY_HERE"/>

To use certain location features, the SDK requires the following permissions to also be added to your AndroidManifest.xml:

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

Variables

This plugin will use the following project variables (defined in your app's variables.gradle file):

• $googleMapsPlayServicesVersion: version of com.google.android.gms:play-services-maps (default: 18.0.2)
• $googleMapsUtilsVersion: version of com.google.maps.android:android-maps-utils (default: 2.3.0)
• $googleMapsKtxVersion: version of com.google.maps.android:maps-ktx (default: 3.4.0)
• $googleMapsUtilsKtxVersion: version of com.google.maps.android:maps-utils-ktx (default: 3.4.0)
• $kotlinxCoroutinesVersion: version of org.jetbrains.kotlinx:kotlinx-coroutines-android and org.jetbrains.kotlinx:kotlinx-coroutines-core (default: 1.6.3)
• $androidxCoreKTXVersion: version of androidx.core:core-ktx (default: 1.8.0)
• $kotlin_version: version of org.jetbrains.kotlin:kotlin-stdlib-jdk7 (default: 1.7.0)

Usage

The Google Maps Capacitor plugin ships with a web component that must be used to render the map in your application as it enables us to embed the native view more effectively on iOS. The plugin will automatically register this web component for use in your application.

For Angular users, you will get an error warning that this web component is unknown to the Angular compiler. This is resolved by modifying the module that declares your component to allow for custom web components.

import { CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';

@NgModule({
  schemas: [CUSTOM_ELEMENTS_SCHEMA]
})

Include this component in your HTML and assign it an ID so that you can easily query for that element reference later.

<capacitor-google-map id="map"></capacitor-google-map>

On Android, the map is rendered beneath the entire webview, and uses this component to manage its positioning during scrolling events. This means that as the developer, you must ensure that the webview is transparent all the way through the layers to the very bottom. In a typically Ionic application, that means setting transparency on elements such as IonContent and the root HTML tag to ensure that it can be seen. If you can't see your map on Android, this should be the first thing you check.

On iOS, we render the map directly into the webview and so the same transparency effects are not required. We are investigating alternate methods for Android still and hope to resolve this better in a future update.

The Google Map element itself comes unstyled, so you should style it to fit within the layout of your page structure. Because we're rendering a view into this slot, by itself the element has no width or height, so be sure to set those explicitly.

capacitor-google-map {
    display: inline-block;
    width: 275px;
    height: 400px;
}

Next, we should create the map reference. This is done by importing the GoogleMap class from the Capacitor plugin and calling the create method, and passing in the required parameters.

import { GoogleMap } from '@capacitor/google-maps';

const apiKey = 'YOUR_API_KEY_HERE';

const mapRef = document.getElementById('map');

const newMap = await GoogleMap.create({
    id: 'my-map', // Unique identifier for this map instance
    element: mapRef, // reference to the capacitor-google-map element
    apiKey: apiKey, // Your Google Maps API Key
    config: {
        center: {
            // The initial position to be rendered by the map
            lat: 33.6,
            lng: -117.9,
        },
        zoom: 8, // The initial zoom level to be rendered by the map
    },
});

At this point, your map should be created within your application. Using the returned reference to the map, you can easily interact with your map in a number of way, a few of which are shown here.

const newMap = await GoogleMap.create({...});

// Add a marker to the map
const markerId = await newMap.addMarker({
    coordinate: {
        lat: 33.6,
        lng: -117.9
    }
});

// Move the map programmatically
await newMap.setCamera({
    coordinate: {
        lat: 33.6,
        lng: -117.9
    }
});

// Enable marker clustering
await newMap.enableClustering();

// Handle marker click
await newMap.setOnMarkerClickListener((event) => {...});

// Clean up map reference
await newMap.destroy();

Full Examples

Angular

import { GoogleMap } from '@capacitor/google-maps';

@Component({
    template: `
    <capacitor-google-map #map></capacitor-google-map>
    <button (click)="createMap()">Create Map</button>
  `,
    styles: [
        `
      capacitor-google-map {
        display: inline-block;
        width: 275px;
        height: 400px;
      }
    `,
    ],
})
export class MyMap {
    @ViewChild('map')
    mapRef: ElementRef<HTMLElement>;
    newMap: GoogleMap;

    async createMap() {
        this.newMap = await GoogleMap.create({
            id: 'my-cool-map',
            element: this.mapRef.nativeElement,
            apiKey: environment.apiKey,
            config: {
                center: {
                    lat: 33.6,
                    lng: -117.9,
                },
                zoom: 8,
            },
        });
    }
}

React

import { GoogleMap } from '@capacitor/google-maps';
import { useRef } from 'react';

const MyMap: React.FC = () => {
    const mapRef = useRef<HTMLElement>();
    let newMap: GoogleMap;

    async function createMap() {
        if (!mapRef.current) return;

        newMap = await GoogleMap.create({
            id: 'my-cool-map',
            element: mapRef.current,
            apiKey: process.env.REACT_APP_YOUR_API_KEY_HERE,
            config: {
                center: {
                    lat: 33.6,
                    lng: -117.9
                },
                zoom: 8
            }
        })
    }

    return (
        <div className="component-wrapper">
            <capacitor-google-map ref={mapRef} style={{
                display: 'inline-block',
                width: 275,
                height: 400
            }}></capacitor-google-map>

            <button onClick={createMap}>Create Map</button>
        </div>
    )
}

export default MyMap;

Javascript

<capacitor-google-map id="map"></capacitor-google-map>
<button onclick="createMap()">Create Map</button>

<style>
    capacitor-google-map {
        display: inline-block;
        width: 275px;
        height: 400px;
    }
</style>

<script>
    import { GoogleMap } from '@capacitor/google-maps';

    const createMap = async () => {
        const mapRef = document.getElementById('map');

        const newMap = await GoogleMap.create({
            id: 'my-map', // Unique identifier for this map instance
            element: mapRef, // reference to the capacitor-google-map element
            apiKey: 'YOUR_API_KEY_HERE', // Your Google Maps API Key
            config: {
                center: {
                    // The initial position to be rendered by the map
                    lat: 33.6,
                    lng: -117.9,
                },
                zoom: 8, // The initial zoom level to be rendered by the map
            },
        });
    };
</script>

API

• create(...)
• resize(...)
• addMarker(...)
• addMarkers(...)
• removeMarker(...)
• removeOverlayPositionChangeListener(...)
• removeMarkers(...)
• enableClustering(...)
• disableClustering(...)
• destroy(...)
• setCamera(...)
• setMapType(...)
• enableIndoorMaps(...)
• toScreenLocation(...)
• enableTrafficLayer(...)
• enableAccessibilityElements(...)
• enableCurrentLocation(...)
• setPadding(...)
• onScroll(...)
• dispatchMapEvent(...)
• getMapBounds(...)
• Interfaces
• Enums

create(...)

create(options: CreateMapArgs) => Promise<void>

Param	Type
options	CreateMapArgs

---

resize(...)

resize(options: ResizeArgs) => Promise<void>

Param	Type
options	ResizeArgs

---

addMarker(...)

addMarker(args: AddMarkerArgs) => Promise<{ id: string; }>

Param	Type
args	AddMarkerArgs

Returns: Promise<{ id: string; }>

---

addMarkers(...)

addMarkers(args: AddMarkersArgs) => Promise<{ ids: string[]; }>

Param	Type
args	AddMarkersArgs

Returns: Promise<{ ids: string[]; }>

---

removeMarker(...)

removeMarker(args: RemoveMarkerArgs) => Promise<void>

Param	Type
args	RemoveMarkerArgs

---

removeOverlayPositionChangeListener(...)

removeOverlayPositionChangeListener(args: RemoveOverlay) => Promise<void>

Param	Type
args	RemoveOverlay

---

removeMarkers(...)

removeMarkers(args: RemoveMarkersArgs) => Promise<void>

Param	Type
args	RemoveMarkersArgs

---

enableClustering(...)

enableClustering(args: { id: string; }) => Promise<void>

Param	Type
args	{ id: string; }

---

disableClustering(...)

disableClustering(args: { id: string; }) => Promise<void>

Param	Type
args	{ id: string; }

---

destroy(...)

destroy(args: DestroyMapArgs) => Promise<void>

Param	Type
args	DestroyMapArgs

---

setCamera(...)

setCamera(args: CameraArgs) => Promise<void>

Param	Type
args	CameraArgs

---

setMapType(...)

setMapType(args: MapTypeArgs) => Promise<void>

Param	Type
args	MapTypeArgs

---

enableIndoorMaps(...)

enableIndoorMaps(args: IndoorMapArgs) => Promise<void>

Param	Type
args	IndoorMapArgs

---

toScreenLocation(...)

toScreenLocation(args: ToScreenLocationArgs) => Promise<any>

Param	Type
args	ToScreenLocationArgs

Returns: Promise<any>

---

enableTrafficLayer(...)

enableTrafficLayer(args: TrafficLayerArgs) => Promise<void>

Param	Type
args	TrafficLayerArgs

---

enableAccessibilityElements(...)

enableAccessibilityElements(args: AccElementsArgs) => Promise<void>

Param	Type
args	AccElementsArgs

---

enableCurrentLocation(...)

enableCurrentLocation(args: CurrentLocArgs) => Promise<void>

Param	Type
args	CurrentLocArgs

---

setPadding(...)

setPadding(args: PaddingArgs) => Promise<void>

Param	Type
args	PaddingArgs

---

onScroll(...)

onScroll(args: OnScrollArgs) => Promise<void>

Param	Type
args	OnScrollArgs

---

dispatchMapEvent(...)

dispatchMapEvent(args: { id: string; focus: boolean; }) => Promise<void>

Param	Type
args	{ id: string; focus: boolean; }

---

getMapBounds(...)

getMapBounds(args: { id: string; }) => Promise<LatLngBounds>

Param	Type
args	{ id: string; }

Returns: Promise<LatLngBounds>

---

Interfaces

CreateMapArgs

An interface containing the options used when creating a map.

Prop	Type	Description	Default
id	string	A unique identifier for the map instance.
apiKey	string	The Google Maps SDK API Key.
config	GoogleMapConfig	The initial configuration settings for the map.
element	HTMLElement	The DOM element that the Google Map View will be mounted on which determines size and positioning.
forceCreate	boolean	Destroy and re-create the map instance if a map with the supplied id already exists	false

GoogleMapConfig

For web, all the javascript Google Maps options are available as GoogleMapConfig extends google.maps.MapOptions. For iOS and Android only the config options declared on GoogleMapConfig are available.

Prop	Type	Description	Default	Since
width	number	Override width for native map.
height	number	Override height for native map.
x	number	Override absolute x coordinate position for native map.
y	number	Override absolute y coordinate position for native map.
center	LatLng	Default location on the Earth towards which the camera points.
zoom	number	Sets the zoom of the map.
androidLiteMode	boolean	Enables image-based lite mode on Android.	false
devicePixelRatio	number	Override pixel ratio for native map.
styles	MapTypeStyle[] | null	Styles to apply to each of the default map types. Note that for satellite, hybrid and terrain modes, these styles will only apply to labels and geometry.		4.3.0

LatLng

An interface representing a pair of latitude and longitude coordinates.

Prop	Type	Description
lat	number	Coordinate latitude, in degrees. This value is in the range [-90, 90].
lng	number	Coordinate longitude, in degrees. This value is in the range [-180, 180].

ResizeArgs

Prop	Type
id	string
bounds	DOMRect

AddMarkerArgs

Prop	Type
id	string
marker	Marker

Marker

A marker is an icon placed at a particular point on the map's surface.

Prop	Type	Description	Default	Since
coordinate	LatLng	Marker position
opacity	number	Sets the opacity of the marker, between 0 (completely transparent) and 1 inclusive.	1
title	string	Title, a short description of the overlay.
snippet	string	Snippet text, shown beneath the title in the info window when selected.
isFlat	boolean	Controls whether this marker should be flat against the Earth's surface or a billboard facing the camera.	false
iconUrl	string	Path to a marker icon to render. It can be relative to the web app public directory, or a https url of a remote marker icon. SVGs are not supported on native platforms.		4.2.0
iconSize	Size	Controls the scaled size of the marker image set in iconUrl.		4.2.0
iconOrigin	Point	The position of the image within a sprite, if any. By default, the origin is located at the top left corner of the image .		4.2.0
iconAnchor	Point	The position at which to anchor an image in correspondence to the location of the marker on the map. By default, the anchor is located along the center point of the bottom of the image.		4.2.0
tintColor	{ r: number; g: number; b: number; a: number; }	Customizes the color of the default marker image. Each value must be between 0 and 255. Only for iOS and Android.		4.2.0
draggable	boolean	Controls whether this marker can be dragged interactively	false

Size

Prop	Type
width	number
height	number

Point

Prop	Type
x	number
y	number

AddMarkersArgs

Prop	Type
id	string
markers	Marker[]

RemoveMarkerArgs

Prop	Type
id	string
markerId	string

RemoveOverlay

Prop	Type
id	string
callbackId	string

RemoveMarkersArgs

Prop	Type
id	string
markerIds	string[]

DestroyMapArgs

Prop	Type
id	string

CameraArgs

Prop	Type
id	string
config	CameraConfig

CameraConfig

Configuration properties for a Google Map Camera

Prop	Type	Description	Default
coordinate	LatLng	Location on the Earth towards which the camera points.
zoom	number	Sets the zoom of the map.
bearing	number	Bearing of the camera, in degrees clockwise from true north.	0
angle	number	The angle, in degrees, of the camera from the nadir (directly facing the Earth). The only allowed values are 0 and 45.	0
animate	boolean	Animate the transition to the new Camera properties.	false
animationDuration	number	This configuration option is not being used.

MapTypeArgs

Prop	Type
id	string
mapType	MapType

IndoorMapArgs

Prop	Type
id	string
enabled	boolean

ToScreenLocationArgs

Prop	Type
id	string
lat	number
lng	number

TrafficLayerArgs

Prop	Type
id	string
enabled	boolean

AccElementsArgs

Prop	Type
id	string
enabled	boolean

CurrentLocArgs

Prop	Type
id	string
enabled	boolean

PaddingArgs

Prop	Type
id	string
padding	MapPadding

MapPadding

Controls for setting padding on the 'visible' region of the view.

Prop	Type
top	number
left	number
right	number
bottom	number

OnScrollArgs

Prop	Type
id	string
mapBounds	{ x: number; y: number; width: number; height: number; }

LatLngBounds

An interface representing the viewports latitude and longitude bounds.

Prop	Type
southwest	LatLng
center	LatLng
northeast	LatLng

Enums

MapType

Members	Value	Description
Normal	'Normal'	Basic map.
Hybrid	'Hybrid'	Satellite imagery with roads and labels.
Satellite	'Satellite'	Satellite imagery with no labels.
Terrain	'Terrain'	Topographic data.
None	'None'	No base map tiles.